path: root/system/gcc/match-split.patch

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109927#c21

From 49ed8cead428b48bf46afbbb37a4d043d00702d6 Mon Sep 17 00:00:00 2001
From: Tamar Christina <tamar.christina@arm.com>
Date: Fri, 5 May 2023 13:37:49 +0100
Subject: [PATCH 04/15] genmatch: split shared code to gimple-match-exports.cc

In preparation for automatically splitting match.pd files I split off the
non-static helper functions that are shared between the match.pd functions off
to another file.

This file can be compiled in parallel and also allows us to later avoid
duplicate symbols errors.

gcc/ChangeLog:

	PR bootstrap/84402
	* Makefile.in (OBJS): Add gimple-match-exports.o.
	* genmatch.cc (decision_tree::gen): Export gimple_gimplify helpers.
	* gimple-match-head.cc (gimple_simplify, gimple_resimplify1,
	gimple_resimplify2, gimple_resimplify3, gimple_resimplify4,
	gimple_resimplify5, constant_for_folding, convert_conditional_op,
	maybe_resimplify_conditional_op, gimple_match_op::resimplify,
	maybe_build_generic_op, build_call_internal, maybe_push_res_to_seq,
	do_valueize, try_conditional_simplification, gimple_extract,
	gimple_extract_op, canonicalize_code, commutative_binary_op_p,
	commutative_ternary_op_p, first_commutative_argument,
	associative_binary_op_p, directly_supported_p,
	get_conditional_internal_fn): Moved to gimple-match-exports.cc
	* gimple-match-exports.cc: New file.

(cherry picked from commit 27fcf994c5515e1bbf2ff03d28fd2fa927c7e7b5)
---
 gcc/Makefile.in             |    4 +-
 gcc/genmatch.cc             |    4 +-
 gcc/gimple-match-exports.cc | 1253 +++++++++++++++++++++++++++++++++++
 gcc/gimple-match-head.cc    | 1192 +--------------------------------
 4 files changed, 1260 insertions(+), 1193 deletions(-)
 create mode 100644 gcc/gimple-match-exports.cc

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 06d192fa9ed8..406856acde1c 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -223,6 +223,7 @@ libgcov-util.o-warn = -Wno-error
 libgcov-driver-tool.o-warn = -Wno-error
 libgcov-merge-tool.o-warn = -Wno-error
 gimple-match.o-warn = -Wno-unused
+gimple-match-exports.o-warn = -Wno-unused
 generic-match.o-warn = -Wno-unused
 dfp.o-warn = -Wno-strict-aliasing
 
@@ -1312,6 +1313,7 @@ ANALYZER_OBJS = \
 # the last objects to finish building.
 OBJS = \
 	gimple-match.o \
+	gimple-match-exports.o \
 	generic-match.o \
 	insn-attrtab.o \
 	insn-automata.o \
@@ -2663,7 +2665,7 @@ s-tm-texi: build/genhooks$(build_exeext) $(srcdir)/doc/tm.texi.in
 	  false; \
 	fi
 
-gimple-match.cc: s-match gimple-match-head.cc ; @true
+gimple-match.cc: s-match gimple-match-head.cc gimple-match-exports.cc ; @true
 generic-match.cc: s-match generic-match-head.cc ; @true
 
 s-match: build/genmatch$(build_exeext) $(srcdir)/match.pd cfn-operators.pd
diff --git a/gcc/genmatch.cc b/gcc/genmatch.cc
index a17ef8a23ed5..665d7e2106ff 100644
--- a/gcc/genmatch.cc
+++ b/gcc/genmatch.cc
@@ -3957,7 +3957,7 @@ decision_tree::gen (FILE *f, bool gimple)
       if (! has_kids_p)
 	{
 	  if (gimple)
-	    fprintf (f, "\nstatic bool\n"
+	    fprintf (f, "\nbool\n"
 			"gimple_simplify (gimple_match_op*, gimple_seq*,\n"
 			"                 tree (*)(tree), code_helper,\n"
 			"                 const tree");
@@ -3980,7 +3980,7 @@ decision_tree::gen (FILE *f, bool gimple)
       /* Then generate the main entry with the outermost switch and
          tail-calls to the split-out functions.  */
       if (gimple)
-	fprintf (f, "\nstatic bool\n"
+	fprintf (f, "\nbool\n"
 		 "gimple_simplify (gimple_match_op *res_op, gimple_seq *seq,\n"
 		 "                 tree (*valueize)(tree) ATTRIBUTE_UNUSED,\n"
 		 "                 code_helper code, const tree type");
diff --git a/gcc/gimple-match-exports.cc b/gcc/gimple-match-exports.cc
new file mode 100644
index 000000000000..7aeb4ddb1524
--- /dev/null
+++ b/gcc/gimple-match-exports.cc
@@ -0,0 +1,1253 @@
+/* Helpers for the autogenerated gimple-match.cc file.
+   Copyright (C) 2023 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "backend.h"
+#include "target.h"
+#include "rtl.h"
+#include "tree.h"
+#include "gimple.h"
+#include "ssa.h"
+#include "cgraph.h"
+#include "vec-perm-indices.h"
+#include "fold-const.h"
+#include "fold-const-call.h"
+#include "stor-layout.h"
+#include "gimple-iterator.h"
+#include "gimple-fold.h"
+#include "calls.h"
+#include "tree-dfa.h"
+#include "builtins.h"
+#include "gimple-match.h"
+#include "tree-pass.h"
+#include "internal-fn.h"
+#include "case-cfn-macros.h"
+#include "gimplify.h"
+#include "optabs-tree.h"
+#include "tree-eh.h"
+#include "dbgcnt.h"
+#include "tm.h"
+#include "gimple-range.h"
+#include "langhooks.h"
+
+tree (*mprts_hook) (gimple_match_op *);
+
+extern bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
+			     code_helper, tree, tree);
+extern bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
+			     code_helper, tree, tree, tree);
+extern bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
+			     code_helper, tree, tree, tree, tree);
+extern bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
+			     code_helper, tree, tree, tree, tree, tree);
+extern bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
+			     code_helper, tree, tree, tree, tree, tree, tree);
+
+/* Functions that are needed by gimple-match but that are exported and used in
+   other places in the compiler.  */
+
+tree gimple_simplify (enum tree_code, tree, tree, gimple_seq *,
+		     tree (*)(tree));
+tree gimple_simplify (enum tree_code, tree, tree, tree, gimple_seq *,
+		     tree (*)(tree));
+tree gimple_simplify (enum tree_code, tree, tree, tree, tree, gimple_seq *,
+		     tree (*)(tree));
+tree gimple_simplify (combined_fn, tree, tree, gimple_seq *,
+		     tree (*)(tree));
+tree gimple_simplify (combined_fn, tree, tree, tree, gimple_seq *,
+		     tree (*)(tree));
+tree gimple_simplify (combined_fn, tree, tree, tree, tree, gimple_seq *,
+		     tree (*)(tree));
+
+tree do_valueize (tree, tree (*)(tree), bool &);
+tree do_valueize (tree (*)(tree), tree);
+
+/* Forward declarations of the private auto-generated matchers.
+   They expect valueized operands in canonical order and do not
+   perform simplification of all-constant operands.  */
+
+static bool gimple_resimplify1 (gimple_seq *, gimple_match_op *, tree (*)(tree));
+static bool gimple_resimplify2 (gimple_seq *, gimple_match_op *, tree (*)(tree));
+static bool gimple_resimplify3 (gimple_seq *, gimple_match_op *, tree (*)(tree));
+static bool gimple_resimplify4 (gimple_seq *, gimple_match_op *, tree (*)(tree));
+static bool gimple_resimplify5 (gimple_seq *, gimple_match_op *, tree (*)(tree));
+
+/* Match and simplify the toplevel valueized operation THIS.
+   Replaces THIS with a simplified and/or canonicalized result and
+   returns whether any change was made.  */
+
+bool
+gimple_match_op::resimplify (gimple_seq *seq, tree (*valueize)(tree))
+{
+  switch (num_ops)
+    {
+    case 1:
+      return gimple_resimplify1 (seq, this, valueize);
+    case 2:
+      return gimple_resimplify2 (seq, this, valueize);
+    case 3:
+      return gimple_resimplify3 (seq, this, valueize);
+    case 4:
+      return gimple_resimplify4 (seq, this, valueize);
+    case 5:
+      return gimple_resimplify5 (seq, this, valueize);
+    default:
+      gcc_unreachable ();
+    }
+}
+
+/* Return whether T is a constant that we'll dispatch to fold to
+   evaluate fully constant expressions.  */
+
+static inline bool
+constant_for_folding (tree t)
+{
+  return (CONSTANT_CLASS_P (t)
+	  /* The following is only interesting to string builtins.  */
+	  || (TREE_CODE (t) == ADDR_EXPR
+	      && TREE_CODE (TREE_OPERAND (t, 0)) == STRING_CST));
+}
+
+/* Try to convert conditional operation ORIG_OP into an IFN_COND_*
+   operation.  Return true on success, storing the new operation in NEW_OP.  */
+
+static bool
+convert_conditional_op (gimple_match_op *orig_op,
+			gimple_match_op *new_op)
+{
+  internal_fn ifn;
+  if (orig_op->code.is_tree_code ())
+    ifn = get_conditional_internal_fn ((tree_code) orig_op->code);
+  else
+    {
+      auto cfn = combined_fn (orig_op->code);
+      if (!internal_fn_p (cfn))
+	return false;
+      ifn = get_conditional_internal_fn (as_internal_fn (cfn));
+    }
+  if (ifn == IFN_LAST)
+    return false;
+  unsigned int num_ops = orig_op->num_ops;
+  new_op->set_op (as_combined_fn (ifn), orig_op->type, num_ops + 2);
+  new_op->ops[0] = orig_op->cond.cond;
+  for (unsigned int i = 0; i < num_ops; ++i)
+    new_op->ops[i + 1] = orig_op->ops[i];
+  tree else_value = orig_op->cond.else_value;
+  if (!else_value)
+    else_value = targetm.preferred_else_value (ifn, orig_op->type,
+					       num_ops, orig_op->ops);
+  new_op->ops[num_ops + 1] = else_value;
+  return true;
+}
+/* Helper for gimple_simplify valueizing OP using VALUEIZE and setting
+   VALUEIZED to true if valueization changed OP.  */
+
+inline tree
+do_valueize (tree op, tree (*valueize)(tree), bool &valueized)
+{
+  if (valueize && TREE_CODE (op) == SSA_NAME)
+    {
+      tree tem = valueize (op);
+      if (tem && tem != op)
+	{
+	  op = tem;
+	  valueized = true;
+	}
+    }
+  return op;
+}
+
+/* If in GIMPLE the operation described by RES_OP should be single-rhs,
+   build a GENERIC tree for that expression and update RES_OP accordingly.  */
+
+void
+maybe_build_generic_op (gimple_match_op *res_op)
+{
+  tree_code code = (tree_code) res_op->code;
+  tree val;
+  switch (code)
+    {
+    case REALPART_EXPR:
+    case IMAGPART_EXPR:
+    case VIEW_CONVERT_EXPR:
+      val = build1 (code, res_op->type, res_op->ops[0]);
+      res_op->set_value (val);
+      break;
+    case BIT_FIELD_REF:
+      val = build3 (code, res_op->type, res_op->ops[0], res_op->ops[1],
+		    res_op->ops[2]);
+      REF_REVERSE_STORAGE_ORDER (val) = res_op->reverse;
+      res_op->set_value (val);
+      break;
+    default:;
+    }
+}
+
+/* Try to build RES_OP, which is known to be a call to FN.  Return null
+   if the target doesn't support the function.  */
+
+static gcall *
+build_call_internal (internal_fn fn, gimple_match_op *res_op)
+{
+  if (direct_internal_fn_p (fn))
+    {
+      tree_pair types = direct_internal_fn_types (fn, res_op->type,
+						  res_op->ops);
+      if (!direct_internal_fn_supported_p (fn, types, OPTIMIZE_FOR_BOTH))
+	return NULL;
+    }
+  return gimple_build_call_internal (fn, res_op->num_ops,
+				     res_op->op_or_null (0),
+				     res_op->op_or_null (1),
+				     res_op->op_or_null (2),
+				     res_op->op_or_null (3),
+				     res_op->op_or_null (4));
+}
+
+/* RES_OP is the result of a simplification.  If it is conditional,
+   try to replace it with the equivalent UNCOND form, such as an
+   IFN_COND_* call or a VEC_COND_EXPR.  Also try to resimplify the
+   result of the replacement if appropriate, adding any new statements to
+   SEQ and using VALUEIZE as the valueization function.  Return true if
+   this resimplification occurred and resulted in at least one change.  */
+
+static bool
+maybe_resimplify_conditional_op (gimple_seq *seq, gimple_match_op *res_op,
+				 tree (*valueize) (tree))
+{
+  if (!res_op->cond.cond)
+    return false;
+
+  if (!res_op->cond.else_value
+      && res_op->code.is_tree_code ())
+    {
+      /* The "else" value doesn't matter.  If the "then" value is a
+	 gimple value, just use it unconditionally.  This isn't a
+	 simplification in itself, since there was no operation to
+	 build in the first place.  */
+      if (gimple_simplified_result_is_gimple_val (res_op))
+	{
+	  res_op->cond.cond = NULL_TREE;
+	  return false;
+	}
+
+      /* Likewise if the operation would not trap.  */
+      bool honor_trapv = (INTEGRAL_TYPE_P (res_op->type)
+			  && TYPE_OVERFLOW_TRAPS (res_op->type));
+      tree_code op_code = (tree_code) res_op->code;
+      bool op_could_trap;
+
+      /* COND_EXPR will trap if, and only if, the condition
+	 traps and hence we have to check this.  For all other operations, we
+	 don't need to consider the operands.  */
+      if (op_code == COND_EXPR)
+	op_could_trap = generic_expr_could_trap_p (res_op->ops[0]);
+      else
+	op_could_trap = operation_could_trap_p ((tree_code) res_op->code,
+						FLOAT_TYPE_P (res_op->type),
+						honor_trapv,
+						res_op->op_or_null (1));
+
+      if (!op_could_trap)
+	{
+	  res_op->cond.cond = NULL_TREE;
+	  return false;
+	}
+    }
+
+  /* If the "then" value is a gimple value and the "else" value matters,
+     create a VEC_COND_EXPR between them, then see if it can be further
+     simplified.  */
+  gimple_match_op new_op;
+  if (res_op->cond.else_value
+      && VECTOR_TYPE_P (res_op->type)
+      && gimple_simplified_result_is_gimple_val (res_op))
+    {
+      new_op.set_op (VEC_COND_EXPR, res_op->type,
+		     res_op->cond.cond, res_op->ops[0],
+		     res_op->cond.else_value);
+      *res_op = new_op;
+      return gimple_resimplify3 (seq, res_op, valueize);
+    }
+
+  /* Otherwise try rewriting the operation as an IFN_COND_* call.
+     Again, this isn't a simplification in itself, since it's what
+     RES_OP already described.  */
+  if (convert_conditional_op (res_op, &new_op))
+    *res_op = new_op;
+
+  return false;
+}
+
+/* If RES_OP is a call to a conditional internal function, try simplifying
+   the associated unconditional operation and using the result to build
+   a new conditional operation.  For example, if RES_OP is:
+
+     IFN_COND_ADD (COND, A, B, ELSE)
+
+   try simplifying (plus A B) and using the result to build a replacement
+   for the whole IFN_COND_ADD.
+
+   Return true if this approach led to a simplification, otherwise leave
+   RES_OP unchanged (and so suitable for other simplifications).  When
+   returning true, add any new statements to SEQ and use VALUEIZE as the
+   valueization function.
+
+   RES_OP is known to be a call to IFN.  */
+
+static bool
+try_conditional_simplification (internal_fn ifn, gimple_match_op *res_op,
+				gimple_seq *seq, tree (*valueize) (tree))
+{
+  code_helper op;
+  tree_code code = conditional_internal_fn_code (ifn);
+  if (code != ERROR_MARK)
+    op = code;
+  else
+    {
+      ifn = get_unconditional_internal_fn (ifn);
+      if (ifn == IFN_LAST)
+	return false;
+      op = as_combined_fn (ifn);
+    }
+
+  unsigned int num_ops = res_op->num_ops;
+  gimple_match_op cond_op (gimple_match_cond (res_op->ops[0],
+					      res_op->ops[num_ops - 1]),
+			   op, res_op->type, num_ops - 2);
+
+  memcpy (cond_op.ops, res_op->ops + 1, (num_ops - 1) * sizeof *cond_op.ops);
+  switch (num_ops - 2)
+    {
+    case 1:
+      if (!gimple_resimplify1 (seq, &cond_op, valueize))
+	return false;
+      break;
+    case 2:
+      if (!gimple_resimplify2 (seq, &cond_op, valueize))
+	return false;
+      break;
+    case 3:
+      if (!gimple_resimplify3 (seq, &cond_op, valueize))
+	return false;
+      break;
+    default:
+      gcc_unreachable ();
+    }
+  *res_op = cond_op;
+  maybe_resimplify_conditional_op (seq, res_op, valueize);
+  return true;
+}
+
+/* Helper for the autogenerated code, valueize OP.  */
+
+tree
+do_valueize (tree (*valueize)(tree), tree op)
+{
+  if (valueize && TREE_CODE (op) == SSA_NAME)
+    {
+      tree tem = valueize (op);
+      if (tem)
+	return tem;
+    }
+  return op;
+}
+
+/* Push the exploded expression described by RES_OP as a statement to
+   SEQ if necessary and return a gimple value denoting the value of the
+   expression.  If RES is not NULL then the result will be always RES
+   and even gimple values are pushed to SEQ.  */
+
+tree
+maybe_push_res_to_seq (gimple_match_op *res_op, gimple_seq *seq, tree res)
+{
+  tree *ops = res_op->ops;
+  unsigned num_ops = res_op->num_ops;
+
+  /* The caller should have converted conditional operations into an UNCOND
+     form and resimplified as appropriate.  The conditional form only
+     survives this far if that conversion failed.  */
+  if (res_op->cond.cond)
+    return NULL_TREE;
+
+  if (res_op->code.is_tree_code ())
+    {
+      if (!res
+	  && gimple_simplified_result_is_gimple_val (res_op))
+	return ops[0];
+      if (mprts_hook)
+	{
+	  tree tem = mprts_hook (res_op);
+	  if (tem)
+	    return tem;
+	}
+    }
+
+  if (!seq)
+    return NULL_TREE;
+
+  /* Play safe and do not allow abnormals to be mentioned in
+     newly created statements.  */
+  for (unsigned int i = 0; i < num_ops; ++i)
+    if (TREE_CODE (ops[i]) == SSA_NAME
+	&& SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ops[i]))
+      return NULL_TREE;
+
+  if (num_ops > 0 && COMPARISON_CLASS_P (ops[0]))
+    for (unsigned int i = 0; i < 2; ++i)
+      if (TREE_CODE (TREE_OPERAND (ops[0], i)) == SSA_NAME
+	  && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (TREE_OPERAND (ops[0], i)))
+	return NULL_TREE;
+
+  if (res_op->code.is_tree_code ())
+    {
+      auto code = tree_code (res_op->code);
+      if (!res)
+	{
+	  if (gimple_in_ssa_p (cfun))
+	    res = make_ssa_name (res_op->type);
+	  else
+	    res = create_tmp_reg (res_op->type);
+	}
+      maybe_build_generic_op (res_op);
+      gimple *new_stmt = gimple_build_assign (res, code,
+					      res_op->op_or_null (0),
+					      res_op->op_or_null (1),
+					      res_op->op_or_null (2));
+      gimple_seq_add_stmt_without_update (seq, new_stmt);
+      return res;
+    }
+  else
+    {
+      gcc_assert (num_ops != 0);
+      auto fn = combined_fn (res_op->code);
+      gcall *new_stmt = NULL;
+      if (internal_fn_p (fn))
+	{
+	  /* Generate the given function if we can.  */
+	  internal_fn ifn = as_internal_fn (fn);
+	  new_stmt = build_call_internal (ifn, res_op);
+	  if (!new_stmt)
+	    return NULL_TREE;
+	}
+      else
+	{
+	  /* Find the function we want to call.  */
+	  tree decl = builtin_decl_implicit (as_builtin_fn (fn));
+	  if (!decl)
+	    return NULL;
+
+	  /* We can't and should not emit calls to non-const functions.  */
+	  if (!(flags_from_decl_or_type (decl) & ECF_CONST))
+	    return NULL;
+
+	  new_stmt = gimple_build_call (decl, num_ops,
+					res_op->op_or_null (0),
+					res_op->op_or_null (1),
+					res_op->op_or_null (2),
+					res_op->op_or_null (3),
+					res_op->op_or_null (4));
+	}
+      if (!res)
+	{
+	  if (gimple_in_ssa_p (cfun))
+	    res = make_ssa_name (res_op->type);
+	  else
+	    res = create_tmp_reg (res_op->type);
+	}
+      gimple_call_set_lhs (new_stmt, res);
+      gimple_seq_add_stmt_without_update (seq, new_stmt);
+      return res;
+    }
+}
+
+
+/* Public API overloads follow for operation being tree_code or
+   built_in_function and for one to three operands or arguments.
+   They return NULL_TREE if nothing could be simplified or
+   the resulting simplified value with parts pushed to SEQ.
+   If SEQ is NULL then if the simplification needs to create
+   new stmts it will fail.  If VALUEIZE is non-NULL then all
+   SSA names will be valueized using that hook prior to
+   applying simplifications.  */
+
+/* Unary ops.  */
+
+tree
+gimple_simplify (enum tree_code code, tree type,
+		 tree op0,
+		 gimple_seq *seq, tree (*valueize)(tree))
+{
+  if (constant_for_folding (op0))
+    {
+      tree res = const_unop (code, type, op0);
+      if (res != NULL_TREE
+	  && CONSTANT_CLASS_P (res))
+	return res;
+    }
+
+  gimple_match_op res_op;
+  if (!gimple_simplify (&res_op, seq, valueize, code, type, op0))
+    return NULL_TREE;
+  return maybe_push_res_to_seq (&res_op, seq);
+}
+
+/* Binary ops.  */
+
+tree
+gimple_simplify (enum tree_code code, tree type,
+		 tree op0, tree op1,
+		 gimple_seq *seq, tree (*valueize)(tree))
+{
+  if (constant_for_folding (op0) && constant_for_folding (op1))
+    {
+      tree res = const_binop (code, type, op0, op1);
+      if (res != NULL_TREE
+	  && CONSTANT_CLASS_P (res))
+	return res;
+    }
+
+  /* Canonicalize operand order both for matching and fallback stmt
+     generation.  */
+  if ((commutative_tree_code (code)
+       || TREE_CODE_CLASS (code) == tcc_comparison)
+      && tree_swap_operands_p (op0, op1))
+    {
+      std::swap (op0, op1);
+      if (TREE_CODE_CLASS (code) == tcc_comparison)
+	code = swap_tree_comparison (code);
+    }
+
+  gimple_match_op res_op;
+  if (!gimple_simplify (&res_op, seq, valueize, code, type, op0, op1))
+    return NULL_TREE;
+  return maybe_push_res_to_seq (&res_op, seq);
+}
+
+/* Ternary ops.  */
+
+tree
+gimple_simplify (enum tree_code code, tree type,
+		 tree op0, tree op1, tree op2,
+		 gimple_seq *seq, tree (*valueize)(tree))
+{
+  if (constant_for_folding (op0) && constant_for_folding (op1)
+      && constant_for_folding (op2))
+    {
+      tree res = fold_ternary/*_to_constant */ (code, type, op0, op1, op2);
+      if (res != NULL_TREE
+	  && CONSTANT_CLASS_P (res))
+	return res;
+    }
+
+  /* Canonicalize operand order both for matching and fallback stmt
+     generation.  */
+  if (commutative_ternary_tree_code (code)
+      && tree_swap_operands_p (op0, op1))
+    std::swap (op0, op1);
+
+  gimple_match_op res_op;
+  if (!gimple_simplify (&res_op, seq, valueize, code, type, op0, op1, op2))
+    return NULL_TREE;
+  return maybe_push_res_to_seq (&res_op, seq);
+}
+
+/* Builtin or internal function with one argument.  */
+
+tree
+gimple_simplify (combined_fn fn, tree type,
+		 tree arg0,
+		 gimple_seq *seq, tree (*valueize)(tree))
+{
+  if (constant_for_folding (arg0))
+    {
+      tree res = fold_const_call (fn, type, arg0);
+      if (res && CONSTANT_CLASS_P (res))
+	return res;
+    }
+
+  gimple_match_op res_op;
+  if (!gimple_simplify (&res_op, seq, valueize, fn, type, arg0))
+    return NULL_TREE;
+  return maybe_push_res_to_seq (&res_op, seq);
+}
+
+/* Builtin or internal function with two arguments.  */
+
+tree
+gimple_simplify (combined_fn fn, tree type,
+		 tree arg0, tree arg1,
+		 gimple_seq *seq, tree (*valueize)(tree))
+{
+  if (constant_for_folding (arg0)
+      && constant_for_folding (arg1))
+    {
+      tree res = fold_const_call (fn, type, arg0, arg1);
+      if (res && CONSTANT_CLASS_P (res))
+	return res;
+    }
+
+  gimple_match_op res_op;
+  if (!gimple_simplify (&res_op, seq, valueize, fn, type, arg0, arg1))
+    return NULL_TREE;
+  return maybe_push_res_to_seq (&res_op, seq);
+}
+
+/* Builtin or internal function with three arguments.  */
+
+tree
+gimple_simplify (combined_fn fn, tree type,
+		 tree arg0, tree arg1, tree arg2,
+		 gimple_seq *seq, tree (*valueize)(tree))
+{
+  if (constant_for_folding (arg0)
+      && constant_for_folding (arg1)
+      && constant_for_folding (arg2))
+    {
+      tree res = fold_const_call (fn, type, arg0, arg1, arg2);
+      if (res && CONSTANT_CLASS_P (res))
+	return res;
+    }
+
+  gimple_match_op res_op;
+  if (!gimple_simplify (&res_op, seq, valueize, fn, type, arg0, arg1, arg2))
+    return NULL_TREE;
+  return maybe_push_res_to_seq (&res_op, seq);
+}
+
+/* Common subroutine of gimple_extract_op and gimple_simplify.  Try to
+   describe STMT in RES_OP, returning true on success.  Before recording
+   an operand, call:
+
+   - VALUEIZE_CONDITION for a COND_EXPR condition
+   - VALUEIZE_OP for every other top-level operand
+
+   Both routines take a tree argument and returns a tree.  */
+
+template<typename ValueizeOp, typename ValueizeCondition>
+inline bool
+gimple_extract (gimple *stmt, gimple_match_op *res_op,
+		ValueizeOp valueize_op,
+		ValueizeCondition valueize_condition)
+{
+  switch (gimple_code (stmt))
+    {
+    case GIMPLE_ASSIGN:
+      {
+	enum tree_code code = gimple_assign_rhs_code (stmt);
+	tree type = TREE_TYPE (gimple_assign_lhs (stmt));
+	switch (gimple_assign_rhs_class (stmt))
+	  {
+	  case GIMPLE_SINGLE_RHS:
+	    if (code == REALPART_EXPR
+		|| code == IMAGPART_EXPR
+		|| code == VIEW_CONVERT_EXPR)
+	      {
+		tree op0 = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0);
+		res_op->set_op (code, type, valueize_op (op0));
+		return true;
+	      }
+	    else if (code == BIT_FIELD_REF)
+	      {
+		tree rhs1 = gimple_assign_rhs1 (stmt);
+		tree op0 = valueize_op (TREE_OPERAND (rhs1, 0));
+		res_op->set_op (code, type, op0,
+				TREE_OPERAND (rhs1, 1),
+				TREE_OPERAND (rhs1, 2),
+				REF_REVERSE_STORAGE_ORDER (rhs1));
+		return true;
+	      }
+	    else if (code == SSA_NAME)
+	      {
+		tree op0 = gimple_assign_rhs1 (stmt);
+		res_op->set_op (TREE_CODE (op0), type, valueize_op (op0));
+		return true;
+	      }
+	    break;
+	  case GIMPLE_UNARY_RHS:
+	    {
+	      tree rhs1 = gimple_assign_rhs1 (stmt);
+	      res_op->set_op (code, type, valueize_op (rhs1));
+	      return true;
+	    }
+	  case GIMPLE_BINARY_RHS:
+	    {
+	      tree rhs1 = valueize_op (gimple_assign_rhs1 (stmt));
+	      tree rhs2 = valueize_op (gimple_assign_rhs2 (stmt));
+	      res_op->set_op (code, type, rhs1, rhs2);
+	      return true;
+	    }
+	  case GIMPLE_TERNARY_RHS:
+	    {
+	      tree rhs1 = gimple_assign_rhs1 (stmt);
+	      if (code == COND_EXPR && COMPARISON_CLASS_P (rhs1))
+		rhs1 = valueize_condition (rhs1);
+	      else
+		rhs1 = valueize_op (rhs1);
+	      tree rhs2 = valueize_op (gimple_assign_rhs2 (stmt));
+	      tree rhs3 = valueize_op (gimple_assign_rhs3 (stmt));
+	      res_op->set_op (code, type, rhs1, rhs2, rhs3);
+	      return true;
+	    }
+	  default:
+	    gcc_unreachable ();
+	  }
+	break;
+      }
+
+    case GIMPLE_CALL:
+      /* ???  This way we can't simplify calls with side-effects.  */
+      if (gimple_call_lhs (stmt) != NULL_TREE
+	  && gimple_call_num_args (stmt) >= 1
+	  && gimple_call_num_args (stmt) <= 5)
+	{
+	  combined_fn cfn;
+	  if (gimple_call_internal_p (stmt))
+	    cfn = as_combined_fn (gimple_call_internal_fn (stmt));
+	  else
+	    {
+	      tree fn = gimple_call_fn (stmt);
+	      if (!fn)
+		return false;
+
+	      fn = valueize_op (fn);
+	      if (TREE_CODE (fn) != ADDR_EXPR
+		  || TREE_CODE (TREE_OPERAND (fn, 0)) != FUNCTION_DECL)
+		return false;
+
+	      tree decl = TREE_OPERAND (fn, 0);
+	      if (DECL_BUILT_IN_CLASS (decl) != BUILT_IN_NORMAL
+		  || !gimple_builtin_call_types_compatible_p (stmt, decl))
+		return false;
+
+	      cfn = as_combined_fn (DECL_FUNCTION_CODE (decl));
+	    }
+
+	  unsigned int num_args = gimple_call_num_args (stmt);
+	  res_op->set_op (cfn, TREE_TYPE (gimple_call_lhs (stmt)), num_args);
+	  for (unsigned i = 0; i < num_args; ++i)
+	    res_op->ops[i] = valueize_op (gimple_call_arg (stmt, i));
+	  return true;
+	}
+      break;
+
+    case GIMPLE_COND:
+      {
+	tree lhs = valueize_op (gimple_cond_lhs (stmt));
+	tree rhs = valueize_op (gimple_cond_rhs (stmt));
+	res_op->set_op (gimple_cond_code (stmt), boolean_type_node, lhs, rhs);
+	return true;
+      }
+
+    default:
+      break;
+    }
+
+  return false;
+}
+
+/* Try to describe STMT in RES_OP, returning true on success.
+   For GIMPLE_CONDs, describe the condition that is being tested.
+   For GIMPLE_ASSIGNs, describe the rhs of the assignment.
+   For GIMPLE_CALLs, describe the call.  */
+
+bool
+gimple_extract_op (gimple *stmt, gimple_match_op *res_op)
+{
+  auto nop = [](tree op) { return op; };
+  return gimple_extract (stmt, res_op, nop, nop);
+}
+
+/* The main STMT based simplification entry.  It is used by the fold_stmt
+   and the fold_stmt_to_constant APIs.  */
+
+bool
+gimple_simplify (gimple *stmt, gimple_match_op *res_op, gimple_seq *seq,
+		 tree (*valueize)(tree), tree (*top_valueize)(tree))
+{
+  bool valueized = false;
+  auto valueize_op = [&](tree op)
+    {
+      return do_valueize (op, top_valueize, valueized);
+    };
+  auto valueize_condition = [&](tree op) -> tree
+    {
+      bool cond_valueized = false;
+      tree lhs = do_valueize (TREE_OPERAND (op, 0), top_valueize,
+			      cond_valueized);
+      tree rhs = do_valueize (TREE_OPERAND (op, 1), top_valueize,
+			      cond_valueized);
+      gimple_match_op res_op2 (res_op->cond, TREE_CODE (op),
+			       TREE_TYPE (op), lhs, rhs);
+      if ((gimple_resimplify2 (seq, &res_op2, valueize)
+	   || cond_valueized)
+	  && res_op2.code.is_tree_code ())
+	{
+	  auto code = tree_code (res_op2.code);
+	  if (TREE_CODE_CLASS (code) == tcc_comparison)
+	    {
+	      valueized = true;
+	      return build2 (code, TREE_TYPE (op),
+			     res_op2.ops[0], res_op2.ops[1]);
+	    }
+	  else if (code == SSA_NAME
+		   || code == INTEGER_CST
+		   || code == VECTOR_CST)
+	    {
+	      valueized = true;
+	      return res_op2.ops[0];
+	    }
+	}
+      return valueize_op (op);
+    };
+
+  if (!gimple_extract (stmt, res_op, valueize_op, valueize_condition))
+    return false;
+
+  if (res_op->code.is_internal_fn ())
+    {
+      internal_fn ifn = internal_fn (res_op->code);
+      if (try_conditional_simplification (ifn, res_op, seq, valueize))
+	return true;
+    }
+
+  if (!res_op->reverse
+      && res_op->num_ops
+      && res_op->resimplify (seq, valueize))
+    return true;
+
+  return valueized;
+}
+
+/* Helper that matches and simplifies the toplevel result from
+   a gimple_simplify run (where we don't want to build
+   a stmt in case it's used in in-place folding).  Replaces
+   RES_OP with a simplified and/or canonicalized result and
+   returns whether any change was made.  */
+
+static bool
+gimple_resimplify1 (gimple_seq *seq, gimple_match_op *res_op,
+		    tree (*valueize)(tree))
+{
+  if (constant_for_folding (res_op->ops[0]))
+    {
+      tree tem = NULL_TREE;
+      if (res_op->code.is_tree_code ())
+	{
+	  auto code = tree_code (res_op->code);
+	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
+	      && TREE_CODE_LENGTH (code) == 1)
+	    tem = const_unop (code, res_op->type, res_op->ops[0]);
+	}
+      else
+	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
+			       res_op->ops[0]);
+      if (tem != NULL_TREE
+	  && CONSTANT_CLASS_P (tem))
+	{
+	  if (TREE_OVERFLOW_P (tem))
+	    tem = drop_tree_overflow (tem);
+	  res_op->set_value (tem);
+	  maybe_resimplify_conditional_op (seq, res_op, valueize);
+	  return true;
+	}
+    }
+
+  /* Limit recursion, there are cases like PR80887 and others, for
+     example when value-numbering presents us with unfolded expressions
+     that we are really not prepared to handle without eventual
+     oscillation like ((_50 + 0) + 8) where _50 gets mapped to _50
+     itself as available expression.  */
+  static unsigned depth;
+  if (depth > 10)
+    {
+      if (dump_file && (dump_flags & TDF_FOLDING))
+	fprintf (dump_file, "Aborting expression simplification due to "
+		 "deep recursion\n");
+      return false;
+    }
+
+  ++depth;
+  gimple_match_op res_op2 (*res_op);
+  if (gimple_simplify (&res_op2, seq, valueize,
+		       res_op->code, res_op->type, res_op->ops[0]))
+    {
+      --depth;
+      *res_op = res_op2;
+      return true;
+    }
+  --depth;
+
+  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
+    return true;
+
+  return false;
+}
+
+/* Helper that matches and simplifies the toplevel result from
+   a gimple_simplify run (where we don't want to build
+   a stmt in case it's used in in-place folding).  Replaces
+   RES_OP with a simplified and/or canonicalized result and
+   returns whether any change was made.  */
+
+static bool
+gimple_resimplify2 (gimple_seq *seq, gimple_match_op *res_op,
+		    tree (*valueize)(tree))
+{
+  if (constant_for_folding (res_op->ops[0])
+      && constant_for_folding (res_op->ops[1]))
+    {
+      tree tem = NULL_TREE;
+      if (res_op->code.is_tree_code ())
+	{
+	  auto code = tree_code (res_op->code);
+	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
+	      && TREE_CODE_LENGTH (code) == 2)
+	    tem = const_binop (code, res_op->type,
+			       res_op->ops[0], res_op->ops[1]);
+	}
+      else
+	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
+			       res_op->ops[0], res_op->ops[1]);
+      if (tem != NULL_TREE
+	  && CONSTANT_CLASS_P (tem))
+	{
+	  if (TREE_OVERFLOW_P (tem))
+	    tem = drop_tree_overflow (tem);
+	  res_op->set_value (tem);
+	  maybe_resimplify_conditional_op (seq, res_op, valueize);
+	  return true;
+	}
+    }
+
+  /* Canonicalize operand order.  */
+  bool canonicalized = false;
+  bool is_comparison
+    = (res_op->code.is_tree_code ()
+       && TREE_CODE_CLASS (tree_code (res_op->code)) == tcc_comparison);
+  if ((is_comparison || commutative_binary_op_p (res_op->code, res_op->type))
+      && tree_swap_operands_p (res_op->ops[0], res_op->ops[1]))
+    {
+      std::swap (res_op->ops[0], res_op->ops[1]);
+      if (is_comparison)
+	res_op->code = swap_tree_comparison (tree_code (res_op->code));
+      canonicalized = true;
+    }
+
+  /* Limit recursion, see gimple_resimplify1.  */
+  static unsigned depth;
+  if (depth > 10)
+    {
+      if (dump_file && (dump_flags & TDF_FOLDING))
+	fprintf (dump_file, "Aborting expression simplification due to "
+		 "deep recursion\n");
+      return false;
+    }
+
+  ++depth;
+  gimple_match_op res_op2 (*res_op);
+  if (gimple_simplify (&res_op2, seq, valueize,
+		       res_op->code, res_op->type,
+		       res_op->ops[0], res_op->ops[1]))
+    {
+      --depth;
+      *res_op = res_op2;
+      return true;
+    }
+  --depth;
+
+  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
+    return true;
+
+  return canonicalized;
+}
+
+/* Helper that matches and simplifies the toplevel result from
+   a gimple_simplify run (where we don't want to build
+   a stmt in case it's used in in-place folding).  Replaces
+   RES_OP with a simplified and/or canonicalized result and
+   returns whether any change was made.  */
+
+static bool
+gimple_resimplify3 (gimple_seq *seq, gimple_match_op *res_op,
+		    tree (*valueize)(tree))
+{
+  if (constant_for_folding (res_op->ops[0])
+      && constant_for_folding (res_op->ops[1])
+      && constant_for_folding (res_op->ops[2]))
+    {
+      tree tem = NULL_TREE;
+      if (res_op->code.is_tree_code ())
+	{
+	  auto code = tree_code (res_op->code);
+	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
+	      && TREE_CODE_LENGTH (code) == 3)
+	    tem = fold_ternary/*_to_constant*/ (code, res_op->type,
+						res_op->ops[0], res_op->ops[1],
+						res_op->ops[2]);
+	}
+      else
+	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
+			       res_op->ops[0], res_op->ops[1], res_op->ops[2]);
+      if (tem != NULL_TREE
+	  && CONSTANT_CLASS_P (tem))
+	{
+	  if (TREE_OVERFLOW_P (tem))
+	    tem = drop_tree_overflow (tem);
+	  res_op->set_value (tem);
+	  maybe_resimplify_conditional_op (seq, res_op, valueize);
+	  return true;
+	}
+    }
+
+  /* Canonicalize operand order.  */
+  bool canonicalized = false;
+  int argno = first_commutative_argument (res_op->code, res_op->type);
+  if (argno >= 0
+      && tree_swap_operands_p (res_op->ops[argno], res_op->ops[argno + 1]))
+    {
+      std::swap (res_op->ops[argno], res_op->ops[argno + 1]);
+      canonicalized = true;
+    }
+
+  /* Limit recursion, see gimple_resimplify1.  */
+  static unsigned depth;
+  if (depth > 10)
+    {
+      if (dump_file && (dump_flags & TDF_FOLDING))
+	fprintf (dump_file, "Aborting expression simplification due to "
+		 "deep recursion\n");
+      return false;
+    }
+
+  ++depth;
+  gimple_match_op res_op2 (*res_op);
+  if (gimple_simplify (&res_op2, seq, valueize,
+		       res_op->code, res_op->type,
+		       res_op->ops[0], res_op->ops[1], res_op->ops[2]))
+    {
+      --depth;
+      *res_op = res_op2;
+      return true;
+    }
+  --depth;
+
+  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
+    return true;
+
+  return canonicalized;
+}
+
+/* Helper that matches and simplifies the toplevel result from
+   a gimple_simplify run (where we don't want to build
+   a stmt in case it's used in in-place folding).  Replaces
+   RES_OP with a simplified and/or canonicalized result and
+   returns whether any change was made.  */
+
+static bool
+gimple_resimplify4 (gimple_seq *seq, gimple_match_op *res_op,
+		    tree (*valueize)(tree))
+{
+  /* No constant folding is defined for four-operand functions.  */
+
+  /* Canonicalize operand order.  */
+  bool canonicalized = false;
+  int argno = first_commutative_argument (res_op->code, res_op->type);
+  if (argno >= 0
+      && tree_swap_operands_p (res_op->ops[argno], res_op->ops[argno + 1]))
+    {
+      std::swap (res_op->ops[argno], res_op->ops[argno + 1]);
+      canonicalized = true;
+    }
+
+  /* Limit recursion, see gimple_resimplify1.  */
+  static unsigned depth;
+  if (depth > 10)
+    {
+      if (dump_file && (dump_flags & TDF_FOLDING))
+	fprintf (dump_file, "Aborting expression simplification due to "
+		 "deep recursion\n");
+      return false;
+    }
+
+  ++depth;
+  gimple_match_op res_op2 (*res_op);
+  if (gimple_simplify (&res_op2, seq, valueize,
+		       res_op->code, res_op->type,
+		       res_op->ops[0], res_op->ops[1], res_op->ops[2],
+		       res_op->ops[3]))
+    {
+      --depth;
+      *res_op = res_op2;
+      return true;
+    }
+  --depth;
+
+  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
+    return true;
+
+  return canonicalized;
+}
+
+/* Helper that matches and simplifies the toplevel result from
+   a gimple_simplify run (where we don't want to build
+   a stmt in case it's used in in-place folding).  Replaces
+   RES_OP with a simplified and/or canonicalized result and
+   returns whether any change was made.  */
+
+static bool
+gimple_resimplify5 (gimple_seq *seq, gimple_match_op *res_op,
+		    tree (*valueize)(tree))
+{
+  /* No constant folding is defined for five-operand functions.  */
+
+  /* Canonicalize operand order.  */
+  bool canonicalized = false;
+  int argno = first_commutative_argument (res_op->code, res_op->type);
+  if (argno >= 0
+      && tree_swap_operands_p (res_op->ops[argno], res_op->ops[argno + 1]))
+    {
+      std::swap (res_op->ops[argno], res_op->ops[argno + 1]);
+      canonicalized = true;
+    }
+
+  gimple_match_op res_op2 (*res_op);
+  if (gimple_simplify (&res_op2, seq, valueize,
+		       res_op->code, res_op->type,
+		       res_op->ops[0], res_op->ops[1], res_op->ops[2],
+		       res_op->ops[3], res_op->ops[4]))
+    {
+      *res_op = res_op2;
+      return true;
+    }
+
+  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
+    return true;
+
+  return canonicalized;
+}
+
+/* Return a canonical form for CODE when operating on TYPE.  The idea
+   is to remove redundant ways of representing the same operation so
+   that code_helpers can be hashed and compared for equality.
+
+   The only current canonicalization is to replace built-in functions
+   with internal functions, in cases where internal-fn.def defines
+   such an internal function.
+
+   Note that the new code_helper cannot necessarily be used in place of
+   the original code_helper.  For example, the new code_helper might be
+   an internal function that the target does not support.  */
+
+code_helper
+canonicalize_code (code_helper code, tree type)
+{
+  if (code.is_fn_code ())
+    return associated_internal_fn (combined_fn (code), type);
+  return code;
+}
+
+/* Return true if CODE is a binary operation and if CODE is commutative when
+   operating on type TYPE.  */
+
+bool
+commutative_binary_op_p (code_helper code, tree type)
+{
+  if (code.is_tree_code ())
+    return commutative_tree_code (tree_code (code));
+  auto cfn = combined_fn (code);
+  return commutative_binary_fn_p (associated_internal_fn (cfn, type));
+}
+
+/* Return true if CODE represents a ternary operation and if the first two
+   operands are commutative when CODE is operating on TYPE.  */
+
+bool
+commutative_ternary_op_p (code_helper code, tree type)
+{
+  if (code.is_tree_code ())
+    return commutative_ternary_tree_code (tree_code (code));
+  auto cfn = combined_fn (code);
+  return commutative_ternary_fn_p (associated_internal_fn (cfn, type));
+}
+
+/* If CODE is commutative in two consecutive operands, return the
+   index of the first, otherwise return -1.  */
+
+int
+first_commutative_argument (code_helper code, tree type)
+{
+  if (code.is_tree_code ())
+    {
+      auto tcode = tree_code (code);
+      if (commutative_tree_code (tcode)
+	  || commutative_ternary_tree_code (tcode))
+	return 0;
+      return -1;
+    }
+  auto cfn = combined_fn (code);
+  return first_commutative_argument (associated_internal_fn (cfn, type));
+}
+
+/* Return true if CODE is a binary operation that is associative when
+   operating on type TYPE.  */
+
+bool
+associative_binary_op_p (code_helper code, tree type)
+{
+  if (code.is_tree_code ())
+    return associative_tree_code (tree_code (code));
+  auto cfn = combined_fn (code);
+  return associative_binary_fn_p (associated_internal_fn (cfn, type));
+}
+
+/* Return true if the target directly supports operation CODE on type TYPE.
+   QUERY_TYPE acts as for optab_for_tree_code.  */
+
+bool
+directly_supported_p (code_helper code, tree type, optab_subtype query_type)
+{
+  if (code.is_tree_code ())
+    {
+      direct_optab optab = optab_for_tree_code (tree_code (code), type,
+						query_type);
+      return (optab != unknown_optab
+	      && optab_handler (optab, TYPE_MODE (type)) != CODE_FOR_nothing);
+    }
+  gcc_assert (query_type == optab_default
+	      || (query_type == optab_vector && VECTOR_TYPE_P (type))
+	      || (query_type == optab_scalar && !VECTOR_TYPE_P (type)));
+  internal_fn ifn = associated_internal_fn (combined_fn (code), type);
+  return (direct_internal_fn_p (ifn)
+	  && direct_internal_fn_supported_p (ifn, type, OPTIMIZE_FOR_SPEED));
+}
+
+/* A wrapper around the internal-fn.cc versions of get_conditional_internal_fn
+   for a code_helper CODE operating on type TYPE.  */
+
+internal_fn
+get_conditional_internal_fn (code_helper code, tree type)
+{
+  if (code.is_tree_code ())
+    return get_conditional_internal_fn (tree_code (code));
+  auto cfn = combined_fn (code);
+  return get_conditional_internal_fn (associated_internal_fn (cfn, type));
+}
diff --git a/gcc/gimple-match-head.cc b/gcc/gimple-match-head.cc
index 21843d7870b3..3069ff5cb6e1 100644
--- a/gcc/gimple-match-head.cc
+++ b/gcc/gimple-match-head.cc
@@ -50,1089 +50,8 @@ along with GCC; see the file COPYING3.  If not see
 #include "attribs.h"
 #include "asan.h"
 
-/* Forward declarations of the private auto-generated matchers.
-   They expect valueized operands in canonical order and do not
-   perform simplification of all-constant operands.  */
-static bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
-			     code_helper, tree, tree);
-static bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
-			     code_helper, tree, tree, tree);
-static bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
-			     code_helper, tree, tree, tree, tree);
-static bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
-			     code_helper, tree, tree, tree, tree, tree);
-static bool gimple_simplify (gimple_match_op *, gimple_seq *, tree (*)(tree),
-			     code_helper, tree, tree, tree, tree, tree, tree);
-static bool gimple_resimplify1 (gimple_seq *, gimple_match_op *,
-				tree (*)(tree));
-static bool gimple_resimplify2 (gimple_seq *, gimple_match_op *,
-				tree (*)(tree));
-static bool gimple_resimplify3 (gimple_seq *, gimple_match_op *,
-				tree (*)(tree));
-static bool gimple_resimplify4 (gimple_seq *, gimple_match_op *,
-				tree (*)(tree));
-static bool gimple_resimplify5 (gimple_seq *, gimple_match_op *,
-				tree (*)(tree));
-
-const unsigned int gimple_match_op::MAX_NUM_OPS;
-
-/* Return whether T is a constant that we'll dispatch to fold to
-   evaluate fully constant expressions.  */
-
-static inline bool
-constant_for_folding (tree t)
-{
-  return (CONSTANT_CLASS_P (t)
-	  /* The following is only interesting to string builtins.  */
-	  || (TREE_CODE (t) == ADDR_EXPR
-	      && TREE_CODE (TREE_OPERAND (t, 0)) == STRING_CST));
-}
-
-/* Try to convert conditional operation ORIG_OP into an IFN_COND_*
-   operation.  Return true on success, storing the new operation in NEW_OP.  */
-
-static bool
-convert_conditional_op (gimple_match_op *orig_op,
-			gimple_match_op *new_op)
-{
-  internal_fn ifn;
-  if (orig_op->code.is_tree_code ())
-    ifn = get_conditional_internal_fn ((tree_code) orig_op->code);
-  else
-    {
-      auto cfn = combined_fn (orig_op->code);
-      if (!internal_fn_p (cfn))
-	return false;
-      ifn = get_conditional_internal_fn (as_internal_fn (cfn));
-    }
-  if (ifn == IFN_LAST)
-    return false;
-  unsigned int num_ops = orig_op->num_ops;
-  new_op->set_op (as_combined_fn (ifn), orig_op->type, num_ops + 2);
-  new_op->ops[0] = orig_op->cond.cond;
-  for (unsigned int i = 0; i < num_ops; ++i)
-    new_op->ops[i + 1] = orig_op->ops[i];
-  tree else_value = orig_op->cond.else_value;
-  if (!else_value)
-    else_value = targetm.preferred_else_value (ifn, orig_op->type,
-					       num_ops, orig_op->ops);
-  new_op->ops[num_ops + 1] = else_value;
-  return true;
-}
-
-/* RES_OP is the result of a simplification.  If it is conditional,
-   try to replace it with the equivalent UNCOND form, such as an
-   IFN_COND_* call or a VEC_COND_EXPR.  Also try to resimplify the
-   result of the replacement if appropriate, adding any new statements to
-   SEQ and using VALUEIZE as the valueization function.  Return true if
-   this resimplification occurred and resulted in at least one change.  */
-
-static bool
-maybe_resimplify_conditional_op (gimple_seq *seq, gimple_match_op *res_op,
-				 tree (*valueize) (tree))
-{
-  if (!res_op->cond.cond)
-    return false;
-
-  if (!res_op->cond.else_value
-      && res_op->code.is_tree_code ())
-    {
-      /* The "else" value doesn't matter.  If the "then" value is a
-	 gimple value, just use it unconditionally.  This isn't a
-	 simplification in itself, since there was no operation to
-	 build in the first place.  */
-      if (gimple_simplified_result_is_gimple_val (res_op))
-	{
-	  res_op->cond.cond = NULL_TREE;
-	  return false;
-	}
-
-      /* Likewise if the operation would not trap.  */
-      bool honor_trapv = (INTEGRAL_TYPE_P (res_op->type)
-			  && TYPE_OVERFLOW_TRAPS (res_op->type));
-      tree_code op_code = (tree_code) res_op->code;
-      bool op_could_trap;
-
-      /* COND_EXPR will trap if, and only if, the condition
-	 traps and hence we have to check this.  For all other operations, we
-	 don't need to consider the operands.  */
-      if (op_code == COND_EXPR)
-	op_could_trap = generic_expr_could_trap_p (res_op->ops[0]);
-      else
-	op_could_trap = operation_could_trap_p ((tree_code) res_op->code,
-						FLOAT_TYPE_P (res_op->type),
-						honor_trapv,
-						res_op->op_or_null (1));
-
-      if (!op_could_trap)
-	{
-	  res_op->cond.cond = NULL_TREE;
-	  return false;
-	}
-    }
-
-  /* If the "then" value is a gimple value and the "else" value matters,
-     create a VEC_COND_EXPR between them, then see if it can be further
-     simplified.  */
-  gimple_match_op new_op;
-  if (res_op->cond.else_value
-      && VECTOR_TYPE_P (res_op->type)
-      && gimple_simplified_result_is_gimple_val (res_op))
-    {
-      new_op.set_op (VEC_COND_EXPR, res_op->type,
-		     res_op->cond.cond, res_op->ops[0],
-		     res_op->cond.else_value);
-      *res_op = new_op;
-      return gimple_resimplify3 (seq, res_op, valueize);
-    }
-
-  /* Otherwise try rewriting the operation as an IFN_COND_* call.
-     Again, this isn't a simplification in itself, since it's what
-     RES_OP already described.  */
-  if (convert_conditional_op (res_op, &new_op))
-    *res_op = new_op;
-
-  return false;
-}
-
-/* Helper that matches and simplifies the toplevel result from
-   a gimple_simplify run (where we don't want to build
-   a stmt in case it's used in in-place folding).  Replaces
-   RES_OP with a simplified and/or canonicalized result and
-   returns whether any change was made.  */
-
-static bool
-gimple_resimplify1 (gimple_seq *seq, gimple_match_op *res_op,
-		    tree (*valueize)(tree))
-{
-  if (constant_for_folding (res_op->ops[0]))
-    {
-      tree tem = NULL_TREE;
-      if (res_op->code.is_tree_code ())
-	{
-	  auto code = tree_code (res_op->code);
-	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
-	      && TREE_CODE_LENGTH (code) == 1)
-	    tem = const_unop (code, res_op->type, res_op->ops[0]);
-	}
-      else
-	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
-			       res_op->ops[0]);
-      if (tem != NULL_TREE
-	  && CONSTANT_CLASS_P (tem))
-	{
-	  if (TREE_OVERFLOW_P (tem))
-	    tem = drop_tree_overflow (tem);
-	  res_op->set_value (tem);
-	  maybe_resimplify_conditional_op (seq, res_op, valueize);
-	  return true;
-	}
-    }
-
-  /* Limit recursion, there are cases like PR80887 and others, for
-     example when value-numbering presents us with unfolded expressions
-     that we are really not prepared to handle without eventual
-     oscillation like ((_50 + 0) + 8) where _50 gets mapped to _50
-     itself as available expression.  */
-  static unsigned depth;
-  if (depth > 10)
-    {
-      if (dump_file && (dump_flags & TDF_FOLDING))
-	fprintf (dump_file, "Aborting expression simplification due to "
-		 "deep recursion\n");
-      return false;
-    }
-
-  ++depth;
-  gimple_match_op res_op2 (*res_op);
-  if (gimple_simplify (&res_op2, seq, valueize,
-		       res_op->code, res_op->type, res_op->ops[0]))
-    {
-      --depth;
-      *res_op = res_op2;
-      return true;
-    }
-  --depth;
-
-  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
-    return true;
-
-  return false;
-}
-
-/* Helper that matches and simplifies the toplevel result from
-   a gimple_simplify run (where we don't want to build
-   a stmt in case it's used in in-place folding).  Replaces
-   RES_OP with a simplified and/or canonicalized result and
-   returns whether any change was made.  */
-
-static bool
-gimple_resimplify2 (gimple_seq *seq, gimple_match_op *res_op,
-		    tree (*valueize)(tree))
-{
-  if (constant_for_folding (res_op->ops[0])
-      && constant_for_folding (res_op->ops[1]))
-    {
-      tree tem = NULL_TREE;
-      if (res_op->code.is_tree_code ())
-	{
-	  auto code = tree_code (res_op->code);
-	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
-	      && TREE_CODE_LENGTH (code) == 2)
-	    tem = const_binop (code, res_op->type,
-			       res_op->ops[0], res_op->ops[1]);
-	}
-      else
-	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
-			       res_op->ops[0], res_op->ops[1]);
-      if (tem != NULL_TREE
-	  && CONSTANT_CLASS_P (tem))
-	{
-	  if (TREE_OVERFLOW_P (tem))
-	    tem = drop_tree_overflow (tem);
-	  res_op->set_value (tem);
-	  maybe_resimplify_conditional_op (seq, res_op, valueize);
-	  return true;
-	}
-    }
-
-  /* Canonicalize operand order.  */
-  bool canonicalized = false;
-  bool is_comparison
-    = (res_op->code.is_tree_code ()
-       && TREE_CODE_CLASS (tree_code (res_op->code)) == tcc_comparison);
-  if ((is_comparison || commutative_binary_op_p (res_op->code, res_op->type))
-      && tree_swap_operands_p (res_op->ops[0], res_op->ops[1]))
-    {
-      std::swap (res_op->ops[0], res_op->ops[1]);
-      if (is_comparison)
-	res_op->code = swap_tree_comparison (tree_code (res_op->code));
-      canonicalized = true;
-    }
-
-  /* Limit recursion, see gimple_resimplify1.  */
-  static unsigned depth;
-  if (depth > 10)
-    {
-      if (dump_file && (dump_flags & TDF_FOLDING))
-	fprintf (dump_file, "Aborting expression simplification due to "
-		 "deep recursion\n");
-      return false;
-    }
-
-  ++depth;
-  gimple_match_op res_op2 (*res_op);
-  if (gimple_simplify (&res_op2, seq, valueize,
-		       res_op->code, res_op->type,
-		       res_op->ops[0], res_op->ops[1]))
-    {
-      --depth;
-      *res_op = res_op2;
-      return true;
-    }
-  --depth;
-
-  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
-    return true;
-
-  return canonicalized;
-}
-
-/* Helper that matches and simplifies the toplevel result from
-   a gimple_simplify run (where we don't want to build
-   a stmt in case it's used in in-place folding).  Replaces
-   RES_OP with a simplified and/or canonicalized result and
-   returns whether any change was made.  */
-
-static bool
-gimple_resimplify3 (gimple_seq *seq, gimple_match_op *res_op,
-		    tree (*valueize)(tree))
-{
-  if (constant_for_folding (res_op->ops[0])
-      && constant_for_folding (res_op->ops[1])
-      && constant_for_folding (res_op->ops[2]))
-    {
-      tree tem = NULL_TREE;
-      if (res_op->code.is_tree_code ())
-	{
-	  auto code = tree_code (res_op->code);
-	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
-	      && TREE_CODE_LENGTH (code) == 3)
-	    tem = fold_ternary/*_to_constant*/ (code, res_op->type,
-						res_op->ops[0], res_op->ops[1],
-						res_op->ops[2]);
-	}
-      else
-	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
-			       res_op->ops[0], res_op->ops[1], res_op->ops[2]);
-      if (tem != NULL_TREE
-	  && CONSTANT_CLASS_P (tem))
-	{
-	  if (TREE_OVERFLOW_P (tem))
-	    tem = drop_tree_overflow (tem);
-	  res_op->set_value (tem);
-	  maybe_resimplify_conditional_op (seq, res_op, valueize);
-	  return true;
-	}
-    }
-
-  /* Canonicalize operand order.  */
-  bool canonicalized = false;
-  int argno = first_commutative_argument (res_op->code, res_op->type);
-  if (argno >= 0
-      && tree_swap_operands_p (res_op->ops[argno], res_op->ops[argno + 1]))
-    {
-      std::swap (res_op->ops[argno], res_op->ops[argno + 1]);
-      canonicalized = true;
-    }
-
-  /* Limit recursion, see gimple_resimplify1.  */
-  static unsigned depth;
-  if (depth > 10)
-    {
-      if (dump_file && (dump_flags & TDF_FOLDING))
-	fprintf (dump_file, "Aborting expression simplification due to "
-		 "deep recursion\n");
-      return false;
-    }
-
-  ++depth;
-  gimple_match_op res_op2 (*res_op);
-  if (gimple_simplify (&res_op2, seq, valueize,
-		       res_op->code, res_op->type,
-		       res_op->ops[0], res_op->ops[1], res_op->ops[2]))
-    {
-      --depth;
-      *res_op = res_op2;
-      return true;
-    }
-  --depth;
-
-  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
-    return true;
-
-  return canonicalized;
-}
-
-/* Helper that matches and simplifies the toplevel result from
-   a gimple_simplify run (where we don't want to build
-   a stmt in case it's used in in-place folding).  Replaces
-   RES_OP with a simplified and/or canonicalized result and
-   returns whether any change was made.  */
-
-static bool
-gimple_resimplify4 (gimple_seq *seq, gimple_match_op *res_op,
-		    tree (*valueize)(tree))
-{
-  /* No constant folding is defined for four-operand functions.  */
-
-  /* Canonicalize operand order.  */
-  bool canonicalized = false;
-  int argno = first_commutative_argument (res_op->code, res_op->type);
-  if (argno >= 0
-      && tree_swap_operands_p (res_op->ops[argno], res_op->ops[argno + 1]))
-    {
-      std::swap (res_op->ops[argno], res_op->ops[argno + 1]);
-      canonicalized = true;
-    }
-
-  /* Limit recursion, see gimple_resimplify1.  */
-  static unsigned depth;
-  if (depth > 10)
-    {
-      if (dump_file && (dump_flags & TDF_FOLDING))
-	fprintf (dump_file, "Aborting expression simplification due to "
-		 "deep recursion\n");
-      return false;
-    }
-
-  ++depth;
-  gimple_match_op res_op2 (*res_op);
-  if (gimple_simplify (&res_op2, seq, valueize,
-		       res_op->code, res_op->type,
-		       res_op->ops[0], res_op->ops[1], res_op->ops[2],
-		       res_op->ops[3]))
-    {
-      --depth;
-      *res_op = res_op2;
-      return true;
-    }
-  --depth;
-
-  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
-    return true;
-
-  return canonicalized;
-}
-
-/* Helper that matches and simplifies the toplevel result from
-   a gimple_simplify run (where we don't want to build
-   a stmt in case it's used in in-place folding).  Replaces
-   RES_OP with a simplified and/or canonicalized result and
-   returns whether any change was made.  */
-
-static bool
-gimple_resimplify5 (gimple_seq *seq, gimple_match_op *res_op,
-		    tree (*valueize)(tree))
-{
-  /* No constant folding is defined for five-operand functions.  */
-
-  /* Canonicalize operand order.  */
-  bool canonicalized = false;
-  int argno = first_commutative_argument (res_op->code, res_op->type);
-  if (argno >= 0
-      && tree_swap_operands_p (res_op->ops[argno], res_op->ops[argno + 1]))
-    {
-      std::swap (res_op->ops[argno], res_op->ops[argno + 1]);
-      canonicalized = true;
-    }
-
-  gimple_match_op res_op2 (*res_op);
-  if (gimple_simplify (&res_op2, seq, valueize,
-		       res_op->code, res_op->type,
-		       res_op->ops[0], res_op->ops[1], res_op->ops[2],
-		       res_op->ops[3], res_op->ops[4]))
-    {
-      *res_op = res_op2;
-      return true;
-    }
-
-  if (maybe_resimplify_conditional_op (seq, res_op, valueize))
-    return true;
-
-  return canonicalized;
-}
-
-/* Match and simplify the toplevel valueized operation THIS.
-   Replaces THIS with a simplified and/or canonicalized result and
-   returns whether any change was made.  */
-
-bool
-gimple_match_op::resimplify (gimple_seq *seq, tree (*valueize)(tree))
-{
-  switch (num_ops)
-    {
-    case 1:
-      return gimple_resimplify1 (seq, this, valueize);
-    case 2:
-      return gimple_resimplify2 (seq, this, valueize);
-    case 3:
-      return gimple_resimplify3 (seq, this, valueize);
-    case 4:
-      return gimple_resimplify4 (seq, this, valueize);
-    case 5:
-      return gimple_resimplify5 (seq, this, valueize);
-    default:
-      gcc_unreachable ();
-    }
-}
-
-/* If in GIMPLE the operation described by RES_OP should be single-rhs,
-   build a GENERIC tree for that expression and update RES_OP accordingly.  */
-
-void
-maybe_build_generic_op (gimple_match_op *res_op)
-{
-  tree_code code = (tree_code) res_op->code;
-  tree val;
-  switch (code)
-    {
-    case REALPART_EXPR:
-    case IMAGPART_EXPR:
-    case VIEW_CONVERT_EXPR:
-      val = build1 (code, res_op->type, res_op->ops[0]);
-      res_op->set_value (val);
-      break;
-    case BIT_FIELD_REF:
-      val = build3 (code, res_op->type, res_op->ops[0], res_op->ops[1],
-		    res_op->ops[2]);
-      REF_REVERSE_STORAGE_ORDER (val) = res_op->reverse;
-      res_op->set_value (val);
-      break;
-    default:;
-    }
-}
-
-tree (*mprts_hook) (gimple_match_op *);
-
-/* Try to build RES_OP, which is known to be a call to FN.  Return null
-   if the target doesn't support the function.  */
-
-static gcall *
-build_call_internal (internal_fn fn, gimple_match_op *res_op)
-{
-  if (direct_internal_fn_p (fn))
-    {
-      tree_pair types = direct_internal_fn_types (fn, res_op->type,
-						  res_op->ops);
-      if (!direct_internal_fn_supported_p (fn, types, OPTIMIZE_FOR_BOTH))
-	return NULL;
-    }
-  return gimple_build_call_internal (fn, res_op->num_ops,
-				     res_op->op_or_null (0),
-				     res_op->op_or_null (1),
-				     res_op->op_or_null (2),
-				     res_op->op_or_null (3),
-				     res_op->op_or_null (4));
-}
-
-/* Push the exploded expression described by RES_OP as a statement to
-   SEQ if necessary and return a gimple value denoting the value of the
-   expression.  If RES is not NULL then the result will be always RES
-   and even gimple values are pushed to SEQ.  */
-
-tree
-maybe_push_res_to_seq (gimple_match_op *res_op, gimple_seq *seq, tree res)
-{
-  tree *ops = res_op->ops;
-  unsigned num_ops = res_op->num_ops;
-
-  /* The caller should have converted conditional operations into an UNCOND
-     form and resimplified as appropriate.  The conditional form only
-     survives this far if that conversion failed.  */
-  if (res_op->cond.cond)
-    return NULL_TREE;
-
-  if (res_op->code.is_tree_code ())
-    {
-      if (!res
-	  && gimple_simplified_result_is_gimple_val (res_op))
-	return ops[0];
-      if (mprts_hook)
-	{
-	  tree tem = mprts_hook (res_op);
-	  if (tem)
-	    return tem;
-	}
-    }
-
-  if (!seq)
-    return NULL_TREE;
-
-  /* Play safe and do not allow abnormals to be mentioned in
-     newly created statements.  */
-  for (unsigned int i = 0; i < num_ops; ++i)
-    if (TREE_CODE (ops[i]) == SSA_NAME
-	&& SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ops[i]))
-      return NULL_TREE;
-
-  if (num_ops > 0 && COMPARISON_CLASS_P (ops[0]))
-    for (unsigned int i = 0; i < 2; ++i)
-      if (TREE_CODE (TREE_OPERAND (ops[0], i)) == SSA_NAME
-	  && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (TREE_OPERAND (ops[0], i)))
-	return NULL_TREE;
-
-  if (res_op->code.is_tree_code ())
-    {
-      auto code = tree_code (res_op->code);
-      if (!res)
-	{
-	  if (gimple_in_ssa_p (cfun))
-	    res = make_ssa_name (res_op->type);
-	  else
-	    res = create_tmp_reg (res_op->type);
-	}
-      maybe_build_generic_op (res_op);
-      gimple *new_stmt = gimple_build_assign (res, code,
-					      res_op->op_or_null (0),
-					      res_op->op_or_null (1),
-					      res_op->op_or_null (2));
-      gimple_seq_add_stmt_without_update (seq, new_stmt);
-      return res;
-    }
-  else
-    {
-      gcc_assert (num_ops != 0);
-      auto fn = combined_fn (res_op->code);
-      gcall *new_stmt = NULL;
-      if (internal_fn_p (fn))
-	{
-	  /* Generate the given function if we can.  */
-	  internal_fn ifn = as_internal_fn (fn);
-	  new_stmt = build_call_internal (ifn, res_op);
-	  if (!new_stmt)
-	    return NULL_TREE;
-	}
-      else
-	{
-	  /* Find the function we want to call.  */
-	  tree decl = builtin_decl_implicit (as_builtin_fn (fn));
-	  if (!decl)
-	    return NULL;
-
-	  /* We can't and should not emit calls to non-const functions.  */
-	  if (!(flags_from_decl_or_type (decl) & ECF_CONST))
-	    return NULL;
-
-	  new_stmt = gimple_build_call (decl, num_ops,
-					res_op->op_or_null (0),
-					res_op->op_or_null (1),
-					res_op->op_or_null (2),
-					res_op->op_or_null (3),
-					res_op->op_or_null (4));
-	}
-      if (!res)
-	{
-	  if (gimple_in_ssa_p (cfun))
-	    res = make_ssa_name (res_op->type);
-	  else
-	    res = create_tmp_reg (res_op->type);
-	}
-      gimple_call_set_lhs (new_stmt, res);
-      gimple_seq_add_stmt_without_update (seq, new_stmt);
-      return res;
-    }
-}
-
-
-/* Public API overloads follow for operation being tree_code or
-   built_in_function and for one to three operands or arguments.
-   They return NULL_TREE if nothing could be simplified or
-   the resulting simplified value with parts pushed to SEQ.
-   If SEQ is NULL then if the simplification needs to create
-   new stmts it will fail.  If VALUEIZE is non-NULL then all
-   SSA names will be valueized using that hook prior to
-   applying simplifications.  */
-
-/* Unary ops.  */
-
-tree
-gimple_simplify (enum tree_code code, tree type,
-		 tree op0,
-		 gimple_seq *seq, tree (*valueize)(tree))
-{
-  if (constant_for_folding (op0))
-    {
-      tree res = const_unop (code, type, op0);
-      if (res != NULL_TREE
-	  && CONSTANT_CLASS_P (res))
-	return res;
-    }
-
-  gimple_match_op res_op;
-  if (!gimple_simplify (&res_op, seq, valueize, code, type, op0))
-    return NULL_TREE;
-  return maybe_push_res_to_seq (&res_op, seq);
-}
-
-/* Binary ops.  */
-
-tree
-gimple_simplify (enum tree_code code, tree type,
-		 tree op0, tree op1,
-		 gimple_seq *seq, tree (*valueize)(tree))
-{
-  if (constant_for_folding (op0) && constant_for_folding (op1))
-    {
-      tree res = const_binop (code, type, op0, op1);
-      if (res != NULL_TREE
-	  && CONSTANT_CLASS_P (res))
-	return res;
-    }
-
-  /* Canonicalize operand order both for matching and fallback stmt
-     generation.  */
-  if ((commutative_tree_code (code)
-       || TREE_CODE_CLASS (code) == tcc_comparison)
-      && tree_swap_operands_p (op0, op1))
-    {
-      std::swap (op0, op1);
-      if (TREE_CODE_CLASS (code) == tcc_comparison)
-	code = swap_tree_comparison (code);
-    }
-
-  gimple_match_op res_op;
-  if (!gimple_simplify (&res_op, seq, valueize, code, type, op0, op1))
-    return NULL_TREE;
-  return maybe_push_res_to_seq (&res_op, seq);
-}
-
-/* Ternary ops.  */
-
-tree
-gimple_simplify (enum tree_code code, tree type,
-		 tree op0, tree op1, tree op2,
-		 gimple_seq *seq, tree (*valueize)(tree))
-{
-  if (constant_for_folding (op0) && constant_for_folding (op1)
-      && constant_for_folding (op2))
-    {
-      tree res = fold_ternary/*_to_constant */ (code, type, op0, op1, op2);
-      if (res != NULL_TREE
-	  && CONSTANT_CLASS_P (res))
-	return res;
-    }
-
-  /* Canonicalize operand order both for matching and fallback stmt
-     generation.  */
-  if (commutative_ternary_tree_code (code)
-      && tree_swap_operands_p (op0, op1))
-    std::swap (op0, op1);
-
-  gimple_match_op res_op;
-  if (!gimple_simplify (&res_op, seq, valueize, code, type, op0, op1, op2))
-    return NULL_TREE;
-  return maybe_push_res_to_seq (&res_op, seq);
-}
-
-/* Builtin or internal function with one argument.  */
-
-tree
-gimple_simplify (combined_fn fn, tree type,
-		 tree arg0,
-		 gimple_seq *seq, tree (*valueize)(tree))
-{
-  if (constant_for_folding (arg0))
-    {
-      tree res = fold_const_call (fn, type, arg0);
-      if (res && CONSTANT_CLASS_P (res))
-	return res;
-    }
-
-  gimple_match_op res_op;
-  if (!gimple_simplify (&res_op, seq, valueize, fn, type, arg0))
-    return NULL_TREE;
-  return maybe_push_res_to_seq (&res_op, seq);
-}
-
-/* Builtin or internal function with two arguments.  */
-
-tree
-gimple_simplify (combined_fn fn, tree type,
-		 tree arg0, tree arg1,
-		 gimple_seq *seq, tree (*valueize)(tree))
-{
-  if (constant_for_folding (arg0)
-      && constant_for_folding (arg1))
-    {
-      tree res = fold_const_call (fn, type, arg0, arg1);
-      if (res && CONSTANT_CLASS_P (res))
-	return res;
-    }
-
-  gimple_match_op res_op;
-  if (!gimple_simplify (&res_op, seq, valueize, fn, type, arg0, arg1))
-    return NULL_TREE;
-  return maybe_push_res_to_seq (&res_op, seq);
-}
-
-/* Builtin or internal function with three arguments.  */
-
-tree
-gimple_simplify (combined_fn fn, tree type,
-		 tree arg0, tree arg1, tree arg2,
-		 gimple_seq *seq, tree (*valueize)(tree))
-{
-  if (constant_for_folding (arg0)
-      && constant_for_folding (arg1)
-      && constant_for_folding (arg2))
-    {
-      tree res = fold_const_call (fn, type, arg0, arg1, arg2);
-      if (res && CONSTANT_CLASS_P (res))
-	return res;
-    }
-
-  gimple_match_op res_op;
-  if (!gimple_simplify (&res_op, seq, valueize, fn, type, arg0, arg1, arg2))
-    return NULL_TREE;
-  return maybe_push_res_to_seq (&res_op, seq);
-}
-
-/* Helper for gimple_simplify valueizing OP using VALUEIZE and setting
-   VALUEIZED to true if valueization changed OP.  */
-
-static inline tree
-do_valueize (tree op, tree (*valueize)(tree), bool &valueized)
-{
-  if (valueize && TREE_CODE (op) == SSA_NAME)
-    {
-      tree tem = valueize (op);
-      if (tem && tem != op)
-	{
-	  op = tem;
-	  valueized = true;
-	}
-    }
-  return op;
-}
-
-/* If RES_OP is a call to a conditional internal function, try simplifying
-   the associated unconditional operation and using the result to build
-   a new conditional operation.  For example, if RES_OP is:
-
-     IFN_COND_ADD (COND, A, B, ELSE)
-
-   try simplifying (plus A B) and using the result to build a replacement
-   for the whole IFN_COND_ADD.
-
-   Return true if this approach led to a simplification, otherwise leave
-   RES_OP unchanged (and so suitable for other simplifications).  When
-   returning true, add any new statements to SEQ and use VALUEIZE as the
-   valueization function.
-
-   RES_OP is known to be a call to IFN.  */
-
-static bool
-try_conditional_simplification (internal_fn ifn, gimple_match_op *res_op,
-				gimple_seq *seq, tree (*valueize) (tree))
-{
-  code_helper op;
-  tree_code code = conditional_internal_fn_code (ifn);
-  if (code != ERROR_MARK)
-    op = code;
-  else
-    {
-      ifn = get_unconditional_internal_fn (ifn);
-      if (ifn == IFN_LAST)
-	return false;
-      op = as_combined_fn (ifn);
-    }
-
-  unsigned int num_ops = res_op->num_ops;
-  gimple_match_op cond_op (gimple_match_cond (res_op->ops[0],
-					      res_op->ops[num_ops - 1]),
-			   op, res_op->type, num_ops - 2);
-
-  memcpy (cond_op.ops, res_op->ops + 1, (num_ops - 1) * sizeof *cond_op.ops);
-  switch (num_ops - 2)
-    {
-    case 1:
-      if (!gimple_resimplify1 (seq, &cond_op, valueize))
-	return false;
-      break;
-    case 2:
-      if (!gimple_resimplify2 (seq, &cond_op, valueize))
-	return false;
-      break;
-    case 3:
-      if (!gimple_resimplify3 (seq, &cond_op, valueize))
-	return false;
-      break;
-    default:
-      gcc_unreachable ();
-    }
-  *res_op = cond_op;
-  maybe_resimplify_conditional_op (seq, res_op, valueize);
-  return true;
-}
-
-/* Common subroutine of gimple_extract_op and gimple_simplify.  Try to
-   describe STMT in RES_OP, returning true on success.  Before recording
-   an operand, call:
-
-   - VALUEIZE_CONDITION for a COND_EXPR condition
-   - VALUEIZE_OP for every other top-level operand
-
-   Both routines take a tree argument and returns a tree.  */
-
-template<typename ValueizeOp, typename ValueizeCondition>
-inline bool
-gimple_extract (gimple *stmt, gimple_match_op *res_op,
-		ValueizeOp valueize_op,
-		ValueizeCondition valueize_condition)
-{
-  switch (gimple_code (stmt))
-    {
-    case GIMPLE_ASSIGN:
-      {
-	enum tree_code code = gimple_assign_rhs_code (stmt);
-	tree type = TREE_TYPE (gimple_assign_lhs (stmt));
-	switch (gimple_assign_rhs_class (stmt))
-	  {
-	  case GIMPLE_SINGLE_RHS:
-	    if (code == REALPART_EXPR
-		|| code == IMAGPART_EXPR
-		|| code == VIEW_CONVERT_EXPR)
-	      {
-		tree op0 = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0);
-		res_op->set_op (code, type, valueize_op (op0));
-		return true;
-	      }
-	    else if (code == BIT_FIELD_REF)
-	      {
-		tree rhs1 = gimple_assign_rhs1 (stmt);
-		tree op0 = valueize_op (TREE_OPERAND (rhs1, 0));
-		res_op->set_op (code, type, op0,
-				TREE_OPERAND (rhs1, 1),
-				TREE_OPERAND (rhs1, 2),
-				REF_REVERSE_STORAGE_ORDER (rhs1));
-		return true;
-	      }
-	    else if (code == SSA_NAME)
-	      {
-		tree op0 = gimple_assign_rhs1 (stmt);
-		res_op->set_op (TREE_CODE (op0), type, valueize_op (op0));
-		return true;
-	      }
-	    break;
-	  case GIMPLE_UNARY_RHS:
-	    {
-	      tree rhs1 = gimple_assign_rhs1 (stmt);
-	      res_op->set_op (code, type, valueize_op (rhs1));
-	      return true;
-	    }
-	  case GIMPLE_BINARY_RHS:
-	    {
-	      tree rhs1 = valueize_op (gimple_assign_rhs1 (stmt));
-	      tree rhs2 = valueize_op (gimple_assign_rhs2 (stmt));
-	      res_op->set_op (code, type, rhs1, rhs2);
-	      return true;
-	    }
-	  case GIMPLE_TERNARY_RHS:
-	    {
-	      tree rhs1 = gimple_assign_rhs1 (stmt);
-	      if (code == COND_EXPR && COMPARISON_CLASS_P (rhs1))
-		rhs1 = valueize_condition (rhs1);
-	      else
-		rhs1 = valueize_op (rhs1);
-	      tree rhs2 = valueize_op (gimple_assign_rhs2 (stmt));
-	      tree rhs3 = valueize_op (gimple_assign_rhs3 (stmt));
-	      res_op->set_op (code, type, rhs1, rhs2, rhs3);
-	      return true;
-	    }
-	  default:
-	    gcc_unreachable ();
-	  }
-	break;
-      }
-
-    case GIMPLE_CALL:
-      /* ???  This way we can't simplify calls with side-effects.  */
-      if (gimple_call_lhs (stmt) != NULL_TREE
-	  && gimple_call_num_args (stmt) >= 1
-	  && gimple_call_num_args (stmt) <= 5)
-	{
-	  combined_fn cfn;
-	  if (gimple_call_internal_p (stmt))
-	    cfn = as_combined_fn (gimple_call_internal_fn (stmt));
-	  else
-	    {
-	      tree fn = gimple_call_fn (stmt);
-	      if (!fn)
-		return false;
-
-	      fn = valueize_op (fn);
-	      if (TREE_CODE (fn) != ADDR_EXPR
-		  || TREE_CODE (TREE_OPERAND (fn, 0)) != FUNCTION_DECL)
-		return false;
-
-	      tree decl = TREE_OPERAND (fn, 0);
-	      if (DECL_BUILT_IN_CLASS (decl) != BUILT_IN_NORMAL
-		  || !gimple_builtin_call_types_compatible_p (stmt, decl))
-		return false;
-
-	      cfn = as_combined_fn (DECL_FUNCTION_CODE (decl));
-	    }
-
-	  unsigned int num_args = gimple_call_num_args (stmt);
-	  res_op->set_op (cfn, TREE_TYPE (gimple_call_lhs (stmt)), num_args);
-	  for (unsigned i = 0; i < num_args; ++i)
-	    res_op->ops[i] = valueize_op (gimple_call_arg (stmt, i));
-	  return true;
-	}
-      break;
-
-    case GIMPLE_COND:
-      {
-	tree lhs = valueize_op (gimple_cond_lhs (stmt));
-	tree rhs = valueize_op (gimple_cond_rhs (stmt));
-	res_op->set_op (gimple_cond_code (stmt), boolean_type_node, lhs, rhs);
-	return true;
-      }
-
-    default:
-      break;
-    }
-
-  return false;
-}
-
-/* Try to describe STMT in RES_OP, returning true on success.
-   For GIMPLE_CONDs, describe the condition that is being tested.
-   For GIMPLE_ASSIGNs, describe the rhs of the assignment.
-   For GIMPLE_CALLs, describe the call.  */
-
-bool
-gimple_extract_op (gimple *stmt, gimple_match_op *res_op)
-{
-  auto nop = [](tree op) { return op; };
-  return gimple_extract (stmt, res_op, nop, nop);
-}
-
-/* The main STMT based simplification entry.  It is used by the fold_stmt
-   and the fold_stmt_to_constant APIs.  */
-
-bool
-gimple_simplify (gimple *stmt, gimple_match_op *res_op, gimple_seq *seq,
-		 tree (*valueize)(tree), tree (*top_valueize)(tree))
-{
-  bool valueized = false;
-  auto valueize_op = [&](tree op)
-    {
-      return do_valueize (op, top_valueize, valueized);
-    };
-  auto valueize_condition = [&](tree op) -> tree
-    {
-      bool cond_valueized = false;
-      tree lhs = do_valueize (TREE_OPERAND (op, 0), top_valueize,
-			      cond_valueized);
-      tree rhs = do_valueize (TREE_OPERAND (op, 1), top_valueize,
-			      cond_valueized);
-      gimple_match_op res_op2 (res_op->cond, TREE_CODE (op),
-			       TREE_TYPE (op), lhs, rhs);
-      if ((gimple_resimplify2 (seq, &res_op2, valueize)
-	   || cond_valueized)
-	  && res_op2.code.is_tree_code ())
-	{
-	  auto code = tree_code (res_op2.code);
-	  if (TREE_CODE_CLASS (code) == tcc_comparison)
-	    {
-	      valueized = true;
-	      return build2 (code, TREE_TYPE (op),
-			     res_op2.ops[0], res_op2.ops[1]);
-	    }
-	  else if (code == SSA_NAME
-		   || code == INTEGER_CST
-		   || code == VECTOR_CST)
-	    {
-	      valueized = true;
-	      return res_op2.ops[0];
-	    }
-	}
-      return valueize_op (op);
-    };
-
-  if (!gimple_extract (stmt, res_op, valueize_op, valueize_condition))
-    return false;
-
-  if (res_op->code.is_internal_fn ())
-    {
-      internal_fn ifn = internal_fn (res_op->code);
-      if (try_conditional_simplification (ifn, res_op, seq, valueize))
-	return true;
-    }
-
-  if (!res_op->reverse
-      && res_op->num_ops
-      && res_op->resimplify (seq, valueize))
-    return true;
-
-  return valueized;
-}
-
-/* Helper for the autogenerated code, valueize OP.  */
-
-inline tree
-do_valueize (tree (*valueize)(tree), tree op)
-{
-  if (valueize && TREE_CODE (op) == SSA_NAME)
-    {
-      tree tem = valueize (op);
-      if (tem)
-	return tem;
-    }
-  return op;
-}
+tree do_valueize (tree, tree (*)(tree), bool &);
+tree do_valueize (tree (*)(tree), tree);
 
 /* Helper for the autogenerated code, get at the definition of NAME when
    VALUEIZE allows that.  */
@@ -1307,110 +226,3 @@ optimize_successive_divisions_p (tree divisor, tree inner_div)
     }
   return true;
 }
-
-/* Return a canonical form for CODE when operating on TYPE.  The idea
-   is to remove redundant ways of representing the same operation so
-   that code_helpers can be hashed and compared for equality.
-
-   The only current canonicalization is to replace built-in functions
-   with internal functions, in cases where internal-fn.def defines
-   such an internal function.
-
-   Note that the new code_helper cannot necessarily be used in place of
-   the original code_helper.  For example, the new code_helper might be
-   an internal function that the target does not support.  */
-
-code_helper
-canonicalize_code (code_helper code, tree type)
-{
-  if (code.is_fn_code ())
-    return associated_internal_fn (combined_fn (code), type);
-  return code;
-}
-
-/* Return true if CODE is a binary operation and if CODE is commutative when
-   operating on type TYPE.  */
-
-bool
-commutative_binary_op_p (code_helper code, tree type)
-{
-  if (code.is_tree_code ())
-    return commutative_tree_code (tree_code (code));
-  auto cfn = combined_fn (code);
-  return commutative_binary_fn_p (associated_internal_fn (cfn, type));
-}
-
-/* Return true if CODE represents a ternary operation and if the first two
-   operands are commutative when CODE is operating on TYPE.  */
-
-bool
-commutative_ternary_op_p (code_helper code, tree type)
-{
-  if (code.is_tree_code ())
-    return commutative_ternary_tree_code (tree_code (code));
-  auto cfn = combined_fn (code);
-  return commutative_ternary_fn_p (associated_internal_fn (cfn, type));
-}
-
-/* If CODE is commutative in two consecutive operands, return the
-   index of the first, otherwise return -1.  */
-
-int
-first_commutative_argument (code_helper code, tree type)
-{
-  if (code.is_tree_code ())
-    {
-      auto tcode = tree_code (code);
-      if (commutative_tree_code (tcode)
-	  || commutative_ternary_tree_code (tcode))
-	return 0;
-      return -1;
-    }
-  auto cfn = combined_fn (code);
-  return first_commutative_argument (associated_internal_fn (cfn, type));
-}
-
-/* Return true if CODE is a binary operation that is associative when
-   operating on type TYPE.  */
-
-bool
-associative_binary_op_p (code_helper code, tree type)
-{
-  if (code.is_tree_code ())
-    return associative_tree_code (tree_code (code));
-  auto cfn = combined_fn (code);
-  return associative_binary_fn_p (associated_internal_fn (cfn, type));
-}
-
-/* Return true if the target directly supports operation CODE on type TYPE.
-   QUERY_TYPE acts as for optab_for_tree_code.  */
-
-bool
-directly_supported_p (code_helper code, tree type, optab_subtype query_type)
-{
-  if (code.is_tree_code ())
-    {
-      direct_optab optab = optab_for_tree_code (tree_code (code), type,
-						query_type);
-      return (optab != unknown_optab
-	      && optab_handler (optab, TYPE_MODE (type)) != CODE_FOR_nothing);
-    }
-  gcc_assert (query_type == optab_default
-	      || (query_type == optab_vector && VECTOR_TYPE_P (type))
-	      || (query_type == optab_scalar && !VECTOR_TYPE_P (type)));
-  internal_fn ifn = associated_internal_fn (combined_fn (code), type);
-  return (direct_internal_fn_p (ifn)
-	  && direct_internal_fn_supported_p (ifn, type, OPTIMIZE_FOR_SPEED));
-}
-
-/* A wrapper around the internal-fn.cc versions of get_conditional_internal_fn
-   for a code_helper CODE operating on type TYPE.  */
-
-internal_fn
-get_conditional_internal_fn (code_helper code, tree type)
-{
-  if (code.is_tree_code ())
-    return get_conditional_internal_fn (tree_code (code));
-  auto cfn = combined_fn (code);
-  return get_conditional_internal_fn (associated_internal_fn (cfn, type));
-}
-- 
2.44.0

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109927#c21

From daac5d2f67656dcf8cc2bbff1c6eaa34f3fb55b9 Mon Sep 17 00:00:00 2001
From: Tamar Christina <tamar.christina@arm.com>
Date: Fri, 5 May 2023 13:38:50 +0100
Subject: [PATCH 05/15] match.pd: automatically partition *-match.cc files.

Following on from Richi's RFC[1] this is another attempt to split up match.pd
into multiple gimple-match and generic-match files.  This version is fully
automated and requires no human intervention.

First things first, some perf numbers.  The following shows the effect of the
patch on my desktop doing parallel compilation of gimple-match:

+--------+------------------+--------+------------------+
| splits | rel. improvement | splits | rel. improvement |
+--------+------------------+--------+------------------+
|      1 | 0.00%            |     33 | 91.03%           |
|      2 | 71.77%           |     34 | 84.02%           |
|      3 | 100.71%          |     35 | 83.42%           |
|      4 | 143.08%          |     36 | 78.80%           |
|      5 | 176.18%          |     37 | 74.06%           |
|      6 | 174.40%          |     38 | 55.76%           |
|      7 | 176.62%          |     39 | 66.90%           |
|      8 | 168.35%          |     40 | 18.25%           |
|      9 | 189.80%          |     41 | 16.55%           |
|     10 | 171.77%          |     42 | 47.02%           |
|     11 | 152.82%          |     43 | 15.29%           |
|     12 | 112.20%          |     44 | 21.63%           |
|     13 | 158.57%          |     45 | 41.53%           |
|     14 | 158.57%          |     46 | 21.98%           |
|     15 | 152.07%          |     47 | -42.74%          |
|     16 | 151.70%          |     48 | -32.62%          |
|     17 | 131.52%          |     49 | 11.81%           |
|     18 | 133.11%          |     50 | 34.07%           |
|     19 | 137.33%          |     51 | 2.71%            |
|     20 | 103.83%          |     52 | -22.23%          |
|     21 | 132.47%          |     53 | 32.30%           |
|     22 | 116.52%          |     54 | 21.45%           |
|     23 | 112.73%          |     55 | 40.02%           |
|     24 | 111.94%          |     56 | 42.83%           |
|     25 | 112.73%          |     57 | -9.98%           |
|     26 | 104.07%          |     58 | 18.01%           |
|     27 | 113.27%          |     59 | -4.91%           |
|     28 | 96.77%           |     60 | 22.94%           |
|     29 | 93.42%           |     61 | -3.73%           |
|     30 | 87.67%           |     62 | -27.43%          |
|     31 | 89.54%           |     63 | -1.05%           |
|     32 | 84.42%           |     64 | -5.44%           |
+--------+------------------+--------+------------------+

As can be seen there seems to be a point of diminishing returns in doing splits.
This comes from the fact that these match files consume a sizeable amount of
headers.  At a certain point the parsing overhead of the headers dominate and
you start losing in gains.

As such from this I've made the default 10 splits per file to allow for some
room for growth in the future without needing changes to the split amount.
Since 5-10 show roughly the same gains it means we can afford to double the
file sizes before we need to up the split amount.  This can be controlled
by the configure parameter --with-matchpd-partitions=.

At 10 splits the sizes of the files are:

 1.2M gimple-match-1.cc
 490K gimple-match-2.cc
 459K gimple-match-3.cc
 462K gimple-match-4.cc
 466K gimple-match-5.cc
 690K gimple-match-6.cc
 517K gimple-match-7.cc
 693K gimple-match-8.cc
1011K gimple-match-9.cc
 490K gimple-match-10.cc
 210K gimple-match-auto.h

The reason gimple-match-1.cc is so large is because it got allocated a very
large function: gimple_simplify_NE_EXPR.

Because of these sporadically large functions the allocation to a split happens
based on the amount of data already written to a split instead of just a simple
round robin allocation (though the patch supports that too.).   This means that
once gimple_simplify_NE_EXPR is allocated to gimple-match-1.cc nothing uses it
again until the rest of the files catch up.

To support this split a new header file *-match-auto.h is generated to allow
the individual files to compile separately.

Lastly for the auto generated files I use pragmas to silence the unused
predicate warnings instead of the previous Makefile way because I couldn't find
a way to set them without knowing the number of split files beforehand.

Finally with this change, bootstrap time has dropped 8 minutes on AArch64.

[1] https://gcc.gnu.org/legacy-ml/gcc-patches/2018-04/msg01125.html

gcc/ChangeLog:

	PR bootstrap/84402
	* genmatch.cc (emit_func, SIZED_BASED_CHUNKS, get_out_file): New.
	(decision_tree::gen): Accept list of files instead of single and update
	to write function definition to header and main file.
	(write_predicate): Likewise.
	(write_header): Emit pragmas and new includes.
	(main): Create file buffers and cleanup.
	(showUsage, write_header_includes): New.

(cherry picked from commit 703417a030b3d80f55ba1402adc3f1692d3631e5)
---
 gcc/genmatch.cc | 226 ++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 190 insertions(+), 36 deletions(-)

diff --git a/gcc/genmatch.cc b/gcc/genmatch.cc
index 665d7e2106ff..f80e4b972288 100644
--- a/gcc/genmatch.cc
+++ b/gcc/genmatch.cc
@@ -183,6 +183,33 @@ fprintf_indent (FILE *f, unsigned int indent, const char *format, ...)
   va_end (ap);
 }
 
+/* Like fprintf, but print to two files, one header one C implementation.  */
+FILE *header_file = NULL;
+
+static void
+#if GCC_VERSION >= 4001
+__attribute__((format (printf, 4, 5)))
+#endif
+emit_func (FILE *f, bool open, bool close, const char *format, ...)
+{
+  va_list ap1, ap2;
+  if (header_file != NULL)
+    {
+      if (open)
+	fprintf (header_file, "extern ");
+      va_start (ap2, format);
+      vfprintf (header_file, format, ap2);
+      va_end (ap2);
+      if (close)
+	fprintf (header_file, ";\n");
+    }
+
+  va_start (ap1, format);
+  vfprintf (f, format, ap1);
+  va_end (ap1);
+  fputc ('\n', f);
+}
+
 static void
 output_line_directive (FILE *f, location_t location,
 		       bool dumpfile = false, bool fnargs = false)
@@ -217,6 +244,37 @@ output_line_directive (FILE *f, location_t location,
     fprintf (f, "/* #line %d \"%s\" */\n", loc.line, loc.file);
 }
 
+/* Find the file to write into next.  We try to evenly distribute the contents
+   over the different files.  */
+
+#define SIZED_BASED_CHUNKS 1
+
+int current_file = 0;
+FILE *get_out_file (vec <FILE *> &parts)
+{
+#ifdef SIZED_BASED_CHUNKS
+   if (parts.length () == 1)
+     return parts[0];
+
+   FILE *f = NULL;
+   long min = 0;
+   /* We've started writing all the files at pos 0, so ftell is equivalent
+      to the size and should be much faster.  */
+   for (unsigned i = 0; i < parts.length (); i++)
+     {
+	long res = ftell (parts[i]);
+	if (!f || res < min)
+	  {
+	    min = res;
+	    f = parts[i];
+	  }
+     }
+  return f;
+#else
+  return parts[current_file++ % parts.length ()];
+#endif
+}
+
 
 /* Pull in tree codes and builtin function codes from their
    definition files.  */
@@ -1732,7 +1790,7 @@ public:
   dt_node *root;
 
   void insert (class simplify *, unsigned);
-  void gen (FILE *f, bool gimple);
+  void gen (vec <FILE *> &f, bool gimple);
   void print (FILE *f = stderr);
 
   decision_tree () { root = new dt_node (dt_node::DT_NODE, NULL); }
@@ -3832,7 +3890,7 @@ sinfo_hashmap_traits::equal_keys (const key_type &v,
    tree.  */
 
 void
-decision_tree::gen (FILE *f, bool gimple)
+decision_tree::gen (vec <FILE *> &files, bool gimple)
 {
   sinfo_map_t si;
 
@@ -3861,11 +3919,14 @@ decision_tree::gen (FILE *f, bool gimple)
 	  output_line_directive (stderr, s->s->s->result->location);
 	}
 
+      /* Cycle the file buffers.  */
+      FILE *f = get_out_file (files);
+
       /* Generate a split out function with the leaf transform code.  */
       s->fname = xasprintf ("%s_simplify_%u", gimple ? "gimple" : "generic",
 			    fcnt++);
       if (gimple)
-	fprintf (f, "\nstatic bool\n"
+	emit_func (f, true, false, "\nbool\n"
 		 "%s (gimple_match_op *res_op, gimple_seq *seq,\n"
 		 "                 tree (*valueize)(tree) ATTRIBUTE_UNUSED,\n"
 		 "                 const tree ARG_UNUSED (type), tree *ARG_UNUSED "
@@ -3873,27 +3934,28 @@ decision_tree::gen (FILE *f, bool gimple)
 		 s->fname);
       else
 	{
-	  fprintf (f, "\nstatic tree\n"
+	  emit_func (f, true, false, "\ntree\n"
 		   "%s (location_t ARG_UNUSED (loc), const tree ARG_UNUSED (type),\n",
 		   (*iter).second->fname);
 	  for (unsigned i = 0;
 	       i < as_a <expr *>(s->s->s->match)->ops.length (); ++i)
-	    fprintf (f, " tree ARG_UNUSED (_p%d),", i);
-	  fprintf (f, " tree *captures\n");
+	    emit_func (f, false, false, " tree ARG_UNUSED (_p%d),", i);
+	  emit_func (f, false, false, " tree *captures\n");
 	}
       for (unsigned i = 0; i < s->s->s->for_subst_vec.length (); ++i)
 	{
 	  if (! s->s->s->for_subst_vec[i].first->used)
 	    continue;
 	  if (is_a <operator_id *> (s->s->s->for_subst_vec[i].second))
-	    fprintf (f, ", const enum tree_code ARG_UNUSED (%s)",
+	    emit_func (f, false, false, ", const enum tree_code ARG_UNUSED (%s)",
 		     s->s->s->for_subst_vec[i].first->id);
 	  else if (is_a <fn_id *> (s->s->s->for_subst_vec[i].second))
-	    fprintf (f, ", const combined_fn ARG_UNUSED (%s)",
+	    emit_func (f, false, false, ", const combined_fn ARG_UNUSED (%s)",
 		     s->s->s->for_subst_vec[i].first->id);
 	}
 
-      fprintf (f, ")\n{\n");
+      emit_func (f, false, true, ")");
+      fprintf (f, "{\n");
       fprintf_indent (f, 2, "const bool debug_dump = "
 			    "dump_file && (dump_flags & TDF_FOLDING);\n");
       s->s->gen_1 (f, 2, gimple, s->s->s->result);
@@ -3923,8 +3985,12 @@ decision_tree::gen (FILE *f, bool gimple)
 		  && e->operation->kind != id_base::CODE))
 	    continue;
 
+
+	  /* Cycle the file buffers.  */
+	  FILE *f = get_out_file (files);
+
 	  if (gimple)
-	    fprintf (f, "\nstatic bool\n"
+	    emit_func (f, true, false,"\nbool\n"
 		     "gimple_simplify_%s (gimple_match_op *res_op,"
 		     " gimple_seq *seq,\n"
 		     "                 tree (*valueize)(tree) "
@@ -3933,13 +3999,13 @@ decision_tree::gen (FILE *f, bool gimple)
 		     "ARG_UNUSED (type)\n",
 		     e->operation->id);
 	  else
-	    fprintf (f, "\nstatic tree\n"
+	    emit_func (f, true, false, "\ntree\n"
 		     "generic_simplify_%s (location_t ARG_UNUSED (loc), enum "
 		     "tree_code ARG_UNUSED (code), const tree ARG_UNUSED (type)",
 		     e->operation->id);
 	  for (unsigned i = 0; i < n; ++i)
-	    fprintf (f, ", tree _p%d", i);
-	  fprintf (f, ")\n");
+	    emit_func (f, false, false,", tree _p%d", i);
+	  emit_func (f, false, true, ")");
 	  fprintf (f, "{\n");
 	  fprintf_indent (f, 2, "const bool debug_dump = "
 				"dump_file && (dump_flags & TDF_FOLDING);\n");
@@ -3956,18 +4022,22 @@ decision_tree::gen (FILE *f, bool gimple)
 	 with compiler warnings, by generating a simple stub.  */
       if (! has_kids_p)
 	{
+
+	  /* Cycle the file buffers.  */
+	  FILE *f = get_out_file (files);
+
 	  if (gimple)
-	    fprintf (f, "\nbool\n"
+	    emit_func (f, true, false, "\nbool\n"
 			"gimple_simplify (gimple_match_op*, gimple_seq*,\n"
 			"                 tree (*)(tree), code_helper,\n"
 			"                 const tree");
 	  else
-	    fprintf (f, "\ntree\n"
+	    emit_func (f, true, false,"\ntree\n"
 			"generic_simplify (location_t, enum tree_code,\n"
 			"                  const tree");
 	  for (unsigned i = 0; i < n; ++i)
-	    fprintf (f, ", tree");
-	  fprintf (f, ")\n");
+	    emit_func (f, false, false, ", tree");
+	  emit_func (f, false, true, ")");
 	  fprintf (f, "{\n");
 	  if (gimple)
 	    fprintf (f, "  return false;\n");
@@ -3977,20 +4047,24 @@ decision_tree::gen (FILE *f, bool gimple)
 	  continue;
 	}
 
+
+      /* Cycle the file buffers.  */
+      FILE *f = get_out_file (files);
+
       /* Then generate the main entry with the outermost switch and
          tail-calls to the split-out functions.  */
       if (gimple)
-	fprintf (f, "\nbool\n"
+	emit_func (f, true, false, "\nbool\n"
 		 "gimple_simplify (gimple_match_op *res_op, gimple_seq *seq,\n"
 		 "                 tree (*valueize)(tree) ATTRIBUTE_UNUSED,\n"
 		 "                 code_helper code, const tree type");
       else
-	fprintf (f, "\ntree\n"
+	emit_func (f, true, false, "\ntree\n"
 		 "generic_simplify (location_t loc, enum tree_code code, "
 		 "const tree type ATTRIBUTE_UNUSED");
       for (unsigned i = 0; i < n; ++i)
-	fprintf (f, ", tree _p%d", i);
-      fprintf (f, ")\n");
+	emit_func (f, false, false, ", tree _p%d", i);
+      emit_func (f, false, true, ")");
       fprintf (f, "{\n");
 
       if (gimple)
@@ -4045,11 +4119,11 @@ decision_tree::gen (FILE *f, bool gimple)
 void
 write_predicate (FILE *f, predicate_id *p, decision_tree &dt, bool gimple)
 {
-  fprintf (f, "\nbool\n"
-	   "%s%s (tree t%s%s)\n"
-	   "{\n", gimple ? "gimple_" : "tree_", p->id,
-	   p->nargs > 0 ? ", tree *res_ops" : "",
-	   gimple ? ", tree (*valueize)(tree) ATTRIBUTE_UNUSED" : "");
+  emit_func (f, true, true, "\nbool\n%s%s (tree t%s%s)",
+		gimple ? "gimple_" : "tree_", p->id,
+		p->nargs > 0 ? ", tree *res_ops" : "",
+		gimple ? ", tree (*valueize)(tree) ATTRIBUTE_UNUSED" : "");
+  fprintf (f, "{\n");
   /* Conveniently make 'type' available.  */
   fprintf_indent (f, 2, "const tree type = TREE_TYPE (t);\n");
   fprintf_indent (f, 2, "const bool debug_dump = "
@@ -4070,9 +4144,13 @@ write_header (FILE *f, const char *head)
 {
   fprintf (f, "/* Generated automatically by the program `genmatch' from\n");
   fprintf (f, "   a IL pattern matching and simplification description.  */\n");
+  fprintf (f, "#pragma GCC diagnostic push\n");
+  fprintf (f, "#pragma GCC diagnostic ignored \"-Wunused-variable\"\n");
+  fprintf (f, "#pragma GCC diagnostic ignored \"-Wunused-function\"\n");
 
   /* Include the header instead of writing it awkwardly quoted here.  */
-  fprintf (f, "\n#include \"%s\"\n", head);
+  if (head)
+    fprintf (f, "\n#include \"%s\"\n", head);
 }
 
 
@@ -5213,6 +5291,30 @@ round_alloc_size (size_t s)
 }
 
 
+/* Construct and display the help menu.  */
+
+static void
+showUsage ()
+{
+  fprintf (stderr, "Usage: genmatch [--gimple] [--generic] "
+		   "[--header=<filename>] [--include=<filename>] [-v[v]] input "
+		   "[<outputfile>...]\n");
+  fprintf (stderr, "\nWhen more then one outputfile is specified --header "
+		   "is required.\n");
+}
+
+/* Write out the correct include to the match-head fle containing the helper
+   files.  */
+
+static void
+write_header_includes (bool gimple, FILE *header_file)
+{
+  if (gimple)
+    fprintf (header_file, "#include \"gimple-match-head.cc\"\n");
+  else
+    fprintf (header_file, "#include \"generic-match-head.cc\"\n");
+}
+
 /* The genmatch generator program.  It reads from a pattern description
    and outputs GIMPLE or GENERIC IL matching and simplification routines.  */
 
@@ -5227,25 +5329,44 @@ main (int argc, char **argv)
     return 1;
 
   bool gimple = true;
-  char *input = argv[argc-1];
-  for (int i = 1; i < argc - 1; ++i)
+  char *s_header_file = NULL;
+  char *s_include_file = NULL;
+  auto_vec <char *> files;
+  char *input = NULL;
+  int last_file = argc - 1;
+  for (int i = argc - 1; i >= 1; --i)
     {
       if (strcmp (argv[i], "--gimple") == 0)
 	gimple = true;
       else if (strcmp (argv[i], "--generic") == 0)
 	gimple = false;
+      else if (strncmp (argv[i], "--header=", 9) == 0)
+	s_header_file = &argv[i][9];
+      else if (strncmp (argv[i], "--include=", 10) == 0)
+	s_include_file = &argv[i][10];
       else if (strcmp (argv[i], "-v") == 0)
 	verbose = 1;
       else if (strcmp (argv[i], "-vv") == 0)
 	verbose = 2;
+      else if (strncmp (argv[i], "--", 2) != 0 && last_file-- == i)
+	files.safe_push (argv[i]);
       else
 	{
-	  fprintf (stderr, "Usage: genmatch "
-		   "[--gimple] [--generic] [-v[v]] input\n");
+	  showUsage ();
 	  return 1;
 	}
     }
 
+  /* Validate if the combinations are valid.  */
+  if ((files.length () > 1 && !s_header_file) || files.is_empty ())
+    showUsage ();
+
+  if (!s_include_file)
+    s_include_file = s_header_file;
+
+  /* Input file is the last in the reverse list.  */
+  input = files.pop ();
+
   line_table = XCNEW (class line_maps);
   linemap_init (line_table, 0);
   line_table->reallocator = xrealloc;
@@ -5292,10 +5413,28 @@ main (int argc, char **argv)
   /* Parse ahead!  */
   parser p (r, gimple);
 
-  if (gimple)
-    write_header (stdout, "gimple-match-head.cc");
+  /* Create file buffers.  */
+  int n_parts = files.is_empty () ? 1 : files.length ();
+  auto_vec <FILE *> parts (n_parts);
+  if (files.is_empty ())
+    {
+      parts.quick_push (stdout);
+      write_header (stdout, s_include_file);
+      write_header_includes (gimple, stdout);
+    }
   else
-    write_header (stdout, "generic-match-head.cc");
+    {
+      for (char *s_file : files)
+	{
+	  parts.quick_push (fopen (s_file, "w"));
+	  write_header (parts.last (), s_include_file);
+	}
+
+      header_file = fopen (s_header_file, "w");
+      fprintf (header_file, "#ifndef GCC_GIMPLE_MATCH_AUTO_H\n"
+			    "#define GCC_GIMPLE_MATCH_AUTO_H\n");
+      write_header_includes (gimple, header_file);
+    }
 
   /* Go over all predicates defined with patterns and perform
      lowering and code generation.  */
@@ -5315,7 +5454,10 @@ main (int argc, char **argv)
       if (verbose == 2)
 	dt.print (stderr);
 
-      write_predicate (stdout, pred, dt, gimple);
+      /* Cycle the file buffers.  */
+      FILE *f = get_out_file (parts);
+
+      write_predicate (f, pred, dt, gimple);
     }
 
   /* Lower the main simplifiers and generate code for them.  */
@@ -5332,7 +5474,19 @@ main (int argc, char **argv)
   if (verbose == 2)
     dt.print (stderr);
 
-  dt.gen (stdout, gimple);
+  dt.gen (parts, gimple);
+
+  for (FILE *f : parts)
+    {
+      fprintf (f, "#pragma GCC diagnostic pop\n");
+      fclose (f);
+    }
+
+  if (header_file)
+    {
+      fprintf (header_file, "#endif /* GCC_GIMPLE_MATCH_AUTO_H.  */\n");
+      fclose (header_file);
+    }
 
   /* Finalize.  */
   cpp_finish (r, NULL);
-- 
2.44.0

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109927#c21

From dcfebe060ee266f364bb60f1cdf0cec58818c4f7 Mon Sep 17 00:00:00 2001
From: Tamar Christina <tamar.christina@arm.com>
Date: Fri, 5 May 2023 13:42:17 +0100
Subject: [PATCH 06/15] match.pd: Use splits in makefile and make configurable.

This updates the build system to split up match.pd files into chunks of 10.
This also introduces a new flag --with-matchpd-partitions which can be used to
change the number of partitions.

For the analysis of why 10 please look at the previous patch in the series.

gcc/ChangeLog:

	PR bootstrap/84402
	* Makefile.in (NUM_MATCH_SPLITS, MATCH_SPLITS_SEQ,
	GIMPLE_MATCH_PD_SEQ_SRC, GIMPLE_MATCH_PD_SEQ_O,
	GENERIC_MATCH_PD_SEQ_SRC, GENERIC_MATCH_PD_SEQ_O): New.
	(OBJS, MOSTLYCLEANFILES, .PRECIOUS): Use them.
	(s-match): Split into s-generic-match and s-gimple-match.
	* configure.ac (with-matchpd-partitions,
	DEFAULT_MATCHPD_PARTITIONS): New.
	* configure: Regenerate.

(cherry picked from commit 0a85544e1aaeca41133ecfc438cda913dbc0f122)
---
 gcc/Makefile.in  | 67 +++++++++++++++++++++++++++++++++---------------
 gcc/config.in    |  6 +++++
 gcc/configure    | 29 +++++++++++++++++++--
 gcc/configure.ac | 15 +++++++++++
 4 files changed, 95 insertions(+), 22 deletions(-)

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 406856acde1c..f0c34d00ecbc 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -214,6 +214,14 @@ rtl-ssa-warn = $(STRICT_WARN)
 GCC_WARN_CFLAGS = $(LOOSE_WARN) $(C_LOOSE_WARN) $($(@D)-warn) $(if $(filter-out $(STRICT_WARN),$($(@D)-warn)),,$(C_STRICT_WARN)) $(NOCOMMON_FLAG) $($@-warn)
 GCC_WARN_CXXFLAGS = $(LOOSE_WARN) $($(@D)-warn) $(NOCOMMON_FLAG) $($@-warn)
 
+# The number of splits to be made for the match.pd files.
+NUM_MATCH_SPLITS = @DEFAULT_MATCHPD_PARTITIONS@
+MATCH_SPLITS_SEQ = $(shell seq 1 $(NUM_MATCH_SPLITS))
+GIMPLE_MATCH_PD_SEQ_SRC = $(patsubst %, gimple-match-%.cc, $(MATCH_SPLITS_SEQ))
+GIMPLE_MATCH_PD_SEQ_O = $(patsubst %, gimple-match-%.o, $(MATCH_SPLITS_SEQ))
+GENERIC_MATCH_PD_SEQ_SRC = $(patsubst %, generic-match-%.cc, $(MATCH_SPLITS_SEQ))
+GENERIC_MATCH_PD_SEQ_O = $(patsubst %, generic-match-%.o, $(MATCH_SPLITS_SEQ))
+
 # These files are to have specific diagnostics suppressed, or are not to
 # be subject to -Werror:
 # flex output may yield harmless "no previous prototype" warnings
@@ -222,9 +230,8 @@ gengtype-lex.o-warn = -Wno-error
 libgcov-util.o-warn = -Wno-error
 libgcov-driver-tool.o-warn = -Wno-error
 libgcov-merge-tool.o-warn = -Wno-error
-gimple-match.o-warn = -Wno-unused
+gimple-match-head.o-warn = -Wno-unused
 gimple-match-exports.o-warn = -Wno-unused
-generic-match.o-warn = -Wno-unused
 dfp.o-warn = -Wno-strict-aliasing
 
 # All warnings have to be shut off in stage1 if the compiler used then
@@ -1312,9 +1319,9 @@ ANALYZER_OBJS = \
 # will build them sooner, because they are large and otherwise tend to be
 # the last objects to finish building.
 OBJS = \
-	gimple-match.o \
+	$(GIMPLE_MATCH_PD_SEQ_O) \
 	gimple-match-exports.o \
-	generic-match.o \
+	$(GENERIC_MATCH_PD_SEQ_O) \
 	insn-attrtab.o \
 	insn-automata.o \
 	insn-dfatab.o \
@@ -1807,7 +1814,8 @@ MOSTLYCLEANFILES = insn-flags.h insn-config.h insn-codes.h \
  insn-output.cc insn-recog.cc insn-emit.cc insn-extract.cc insn-peep.cc \
  insn-attr.h insn-attr-common.h insn-attrtab.cc insn-dfatab.cc \
  insn-latencytab.cc insn-opinit.cc insn-opinit.h insn-preds.cc insn-constants.h \
- tm-preds.h tm-constrs.h checksum-options gimple-match.cc generic-match.cc \
+ tm-preds.h tm-constrs.h checksum-options $(GIMPLE_MATCH_PD_SEQ_SRC) \
+ $(GENERIC_MATCH_PD_SEQ_SRC) gimple-match-auto.h generic-match-auto.h \
  tree-check.h min-insn-modes.cc insn-modes.cc insn-modes.h insn-modes-inline.h \
  genrtl.h gt-*.h gtype-*.h gtype-desc.cc gtyp-input.list \
  case-cfn-macros.h cfn-operators.pd \
@@ -2422,7 +2430,8 @@ $(common_out_object_file): $(common_out_file)
 .PRECIOUS: insn-config.h insn-flags.h insn-codes.h insn-constants.h \
   insn-emit.cc insn-recog.cc insn-extract.cc insn-output.cc insn-peep.cc \
   insn-attr.h insn-attr-common.h insn-attrtab.cc insn-dfatab.cc \
-  insn-latencytab.cc insn-preds.cc gimple-match.cc generic-match.cc \
+  insn-latencytab.cc insn-preds.cc $(GIMPLE_MATCH_PD_SEQ_SRC) \
+  $(GENERIC_MATCH_PD_SEQ_SRC) gimple-match-auto.h generic-match-auto.h \
   insn-target-def.h
 
 # Dependencies for the md file.  The first time through, we just assume
@@ -2665,19 +2674,36 @@ s-tm-texi: build/genhooks$(build_exeext) $(srcdir)/doc/tm.texi.in
 	  false; \
 	fi
 
-gimple-match.cc: s-match gimple-match-head.cc gimple-match-exports.cc ; @true
-generic-match.cc: s-match generic-match-head.cc ; @true
-
-s-match: build/genmatch$(build_exeext) $(srcdir)/match.pd cfn-operators.pd
-	$(RUN_GEN) build/genmatch$(build_exeext) --gimple $(srcdir)/match.pd \
-	    > tmp-gimple-match.cc
-	$(RUN_GEN) build/genmatch$(build_exeext) --generic $(srcdir)/match.pd \
-	    > tmp-generic-match.cc
-	$(SHELL) $(srcdir)/../move-if-change tmp-gimple-match.cc \
-	    					gimple-match.cc
-	$(SHELL) $(srcdir)/../move-if-change tmp-generic-match.cc \
-	    					generic-match.cc
-	$(STAMP) s-match
+$(GIMPLE_MATCH_PD_SEQ_SRC): s-gimple-match gimple-match-head.cc \
+		    gimple-match-exports.cc; @true
+gimple-match-auto.h: s-gimple-match gimple-match-head.cc \
+		    gimple-match-exports.cc; @true
+$(GENERIC_MATCH_PD_SEQ_SRC): s-generic-match generic-match-head.cc; @true
+generic-match-auto.h: s-generic-match generic-match-head.cc; @true
+
+s-gimple-match: build/genmatch$(build_exeext) \
+	    $(srcdir)/match.pd cfn-operators.pd
+	$(RUN_GEN) build/genmatch$(build_exeext) --gimple \
+	    --header=tmp-gimple-match-auto.h --include=gimple-match-auto.h \
+	    $(srcdir)/match.pd $(patsubst %, tmp-%, $(GIMPLE_MATCH_PD_SEQ_SRC))
+	$(foreach id, $(MATCH_SPLITS_SEQ), \
+	  $(SHELL) $(srcdir)/../move-if-change tmp-gimple-match-$(id).cc \
+	    gimple-match-$(id).cc;)
+	$(SHELL) $(srcdir)/../move-if-change tmp-gimple-match-auto.h \
+						gimple-match-auto.h
+	$(STAMP) s-gimple-match
+
+s-generic-match: build/genmatch$(build_exeext) \
+	    $(srcdir)/match.pd cfn-operators.pd
+	$(RUN_GEN) build/genmatch$(build_exeext) --generic \
+	    --header=tmp-generic-match-auto.h --include=generic-match-auto.h \
+	    $(srcdir)/match.pd $(patsubst %, tmp-%, $(GENERIC_MATCH_PD_SEQ_SRC))
+	$(foreach id, $(MATCH_SPLITS_SEQ), \
+	  $(SHELL) $(srcdir)/../move-if-change tmp-generic-match-$(id).cc \
+	    generic-match-$(id).cc;)
+	$(SHELL) $(srcdir)/../move-if-change tmp-generic-match-auto.h \
+						generic-match-auto.h
+	$(STAMP) s-generic-match
 
 GTFILES = $(CPPLIB_H) $(srcdir)/input.h $(srcdir)/coretypes.h \
   $(host_xm_file_list) \
@@ -2812,7 +2838,8 @@ generated_files = config.h tm.h $(TM_P_H) $(TM_D_H) $(TM_H) multilib.h \
        $(ALL_GTFILES_H) gtype-desc.cc gtype-desc.h version.h \
        options.h target-hooks-def.h insn-opinit.h \
        common/common-target-hooks-def.h pass-instances.def \
-       gimple-match.cc generic-match.cc \
+       $(GIMPLE_MATCH_PD_SEQ_SRC) $(GENERIC_MATCH_PD_SEQ_SRC) \
+       gimple-match-auto.h generic-match-auto.h \
        c-family/c-target-hooks-def.h d/d-target-hooks-def.h \
        case-cfn-macros.h \
        cfn-operators.pd omp-device-properties.h
diff --git a/gcc/config.in b/gcc/config.in
index 5281a12a707c..ea60c5b11fc5 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -67,6 +67,12 @@
 #endif
 
 
+/* Define to larger than one set the number of match.pd partitions to make. */
+#ifndef USED_FOR_TARGET
+#undef DEFAULT_MATCHPD_PARTITIONS
+#endif
+
+
 /* Define to larger than zero set the default stack clash protector size. */
 #ifndef USED_FOR_TARGET
 #undef DEFAULT_STK_CLASH_GUARD_SIZE
diff --git a/gcc/configure b/gcc/configure
index ade0af23e8cc..542d100c2b73 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -838,6 +838,7 @@ enable_gcov
 enable_shared
 enable_fixed_point
 enable_decimal_float
+DEFAULT_MATCHPD_PARTITIONS
 with_float
 with_cpu
 enable_multiarch
@@ -965,6 +966,7 @@ enable_valgrind_annotations
 enable_multilib
 enable_multiarch
 with_stack_clash_protection_guard_size
+with_matchpd_partitions
 enable___cxa_atexit
 enable_decimal_float
 enable_fixed_point
@@ -1832,6 +1834,9 @@ Optional Packages:
   --with-stack-clash-protection-guard-size=size
                           Set the default stack clash protection guard size
                           for specific targets as a power of two in bytes.
+  --with-matchpd-partitions=num
+                          Set the number of partitions to make for gimple and
+                          generic when splitting match.pd. [default=10]
   --with-dwarf2           force the default debug format to be DWARF 2 (or
                           later)
   --with-specs=SPECS      add SPECS to driver command-line processing
@@ -7918,6 +7923,26 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
+# Specify the number of splits of match.pd to generate.
+
+# Check whether --with-matchpd-partitions was given.
+if test "${with_matchpd_partitions+set}" = set; then :
+  withval=$with_matchpd_partitions; DEFAULT_MATCHPD_PARTITIONS="$with_matchpd_partitions"
+else
+  DEFAULT_MATCHPD_PARTITIONS=10
+fi
+
+if (test $DEFAULT_MATCHPD_PARTITIONS -lt 1); then
+  as_fn_error $? "Invalid value $DEFAULT_MATCHPD_PARTITIONS for --with-matchpd-partitions. Cannot be negative." "$LINENO" 5
+fi
+
+
+cat >>confdefs.h <<_ACEOF
+#define DEFAULT_MATCHPD_PARTITIONS $DEFAULT_MATCHPD_PARTITIONS
+_ACEOF
+
+
+
 # Enable __cxa_atexit for C++.
 # Check whether --enable-__cxa_atexit was given.
 if test "${enable___cxa_atexit+set}" = set; then :
@@ -19871,7 +19896,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 19874 "configure"
+#line 19899 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -19977,7 +20002,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 19980 "configure"
+#line 20005 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
diff --git a/gcc/configure.ac b/gcc/configure.ac
index bf8ff4d63906..31aa8566a3e7 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -943,6 +943,21 @@ fi
 AC_DEFINE_UNQUOTED(DEFAULT_STK_CLASH_GUARD_SIZE, $DEFAULT_STK_CLASH_GUARD_SIZE,
 	[Define to larger than zero set the default stack clash protector size.])
 
+# Specify the number of splits of match.pd to generate.
+AC_ARG_WITH(matchpd-partitions,
+[AS_HELP_STRING([--with-matchpd-partitions=num],
+[Set the number of partitions to make for gimple and generic when splitting match.pd. [default=10]])],
+[DEFAULT_MATCHPD_PARTITIONS="$with_matchpd_partitions"], [DEFAULT_MATCHPD_PARTITIONS=10])
+if (test $DEFAULT_MATCHPD_PARTITIONS -lt 1); then
+  AC_MSG_ERROR(m4_normalize([
+		Invalid value $DEFAULT_MATCHPD_PARTITIONS for --with-matchpd-partitions. \
+		Cannot be negative.]))
+fi
+
+AC_DEFINE_UNQUOTED(DEFAULT_MATCHPD_PARTITIONS, $DEFAULT_MATCHPD_PARTITIONS,
+	[Define to larger than one set the number of match.pd partitions to make.])
+AC_SUBST(DEFAULT_MATCHPD_PARTITIONS)
+
 # Enable __cxa_atexit for C++.
 AC_ARG_ENABLE(__cxa_atexit,
 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
-- 
2.44.0

From 2c1f550db00c7dd9abede5644a3acd915767e0ad Mon Sep 17 00:00:00 2001
From: Alexander Monakov <amonakov@ispras.ru>
Date: Fri, 5 May 2023 19:46:25 +0300
Subject: [PATCH 07/15] Makefile.in: clean up match.pd-related dependencies

Clean up confusing changes from the recent refactoring for
parallel match.pd build.

gimple-match-head.o is not built. Remove related flags adjustment.

Autogenerated gimple-match-N.o files do not depend on
gimple-match-exports.cc.

{gimple,generic)-match-auto.h only depend on the prerequisites of the
corresponding s-{gimple,generic}-match stamp file, not any .cc file.

gcc/ChangeLog:

	* Makefile.in: (gimple-match-head.o-warn): Remove.
	(GIMPLE_MATCH_PD_SEQ_SRC): Do not depend on
	gimple-match-exports.cc.
	(gimple-match-auto.h): Only depend on s-gimple-match.
	(generic-match-auto.h): Likewise.

(cherry picked from commit 31c70a7daa368767f0f58e0389deb2c69d9e14fd)
---
 gcc/Makefile.in | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index f0c34d00ecbc..fe3af5c8008c 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -230,7 +230,6 @@ gengtype-lex.o-warn = -Wno-error
 libgcov-util.o-warn = -Wno-error
 libgcov-driver-tool.o-warn = -Wno-error
 libgcov-merge-tool.o-warn = -Wno-error
-gimple-match-head.o-warn = -Wno-unused
 gimple-match-exports.o-warn = -Wno-unused
 dfp.o-warn = -Wno-strict-aliasing
 
@@ -2674,12 +2673,10 @@ s-tm-texi: build/genhooks$(build_exeext) $(srcdir)/doc/tm.texi.in
 	  false; \
 	fi
 
-$(GIMPLE_MATCH_PD_SEQ_SRC): s-gimple-match gimple-match-head.cc \
-		    gimple-match-exports.cc; @true
-gimple-match-auto.h: s-gimple-match gimple-match-head.cc \
-		    gimple-match-exports.cc; @true
+$(GIMPLE_MATCH_PD_SEQ_SRC): s-gimple-match gimple-match-head.cc; @true
+gimple-match-auto.h: s-gimple-match; @true
 $(GENERIC_MATCH_PD_SEQ_SRC): s-generic-match generic-match-head.cc; @true
-generic-match-auto.h: s-generic-match generic-match-head.cc; @true
+generic-match-auto.h: s-generic-match; @true
 
 s-gimple-match: build/genmatch$(build_exeext) \
 	    $(srcdir)/match.pd cfn-operators.pd
-- 
2.44.0

https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=319aef8d2fde32be5cfed99f321c7f90e33d1f1d

From a18a994030d16f58ebced231e778ec4e06a98abb Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Sat, 6 May 2023 02:32:17 +0200
Subject: [PATCH 08/15] build: Replace seq for portability with GNU Make
 variant

Some hosts like AIX don't have seq command, this patch replaces it
with something that uses just GNU make features we've been using
for this already before for the parallel make check.

2023-05-06  Jakub Jelinek  <jakub@redhat.com>

	* Makefile.in (check_p_numbers): Rename to one_to_9999, move
	earlier with helper variables also renamed.
	(MATCH_SPLUT_SEQ): Use $(wordlist 1,$(NUM_MATCH_SPLITS),$(one_to_9999))
	instead of $(shell seq 1 $(NUM_MATCH_SPLITS)).
	(check_p_subdirs): Use $(one_to_9999) instead of $(check_p_numbers).

(cherry picked from commit 319aef8d2fde32be5cfed99f321c7f90e33d1f1d)
---
 gcc/Makefile.in | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index fe3af5c8008c..975fbb61ea8a 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -214,9 +214,19 @@ rtl-ssa-warn = $(STRICT_WARN)
 GCC_WARN_CFLAGS = $(LOOSE_WARN) $(C_LOOSE_WARN) $($(@D)-warn) $(if $(filter-out $(STRICT_WARN),$($(@D)-warn)),,$(C_STRICT_WARN)) $(NOCOMMON_FLAG) $($@-warn)
 GCC_WARN_CXXFLAGS = $(LOOSE_WARN) $($(@D)-warn) $(NOCOMMON_FLAG) $($@-warn)
 
+# 1 2 3 ... 9999
+one_to_9999_0:=1 2 3 4 5 6 7 8 9
+one_to_9999_1:=0 $(one_to_9999_0)
+one_to_9999_2:=$(foreach i,$(one_to_9999_0),$(addprefix $(i),$(one_to_9999_1)))
+one_to_9999_3:=$(addprefix 0,$(one_to_9999_1)) $(one_to_9999_2)
+one_to_9999_4:=$(foreach i,$(one_to_9999_0),$(addprefix $(i),$(one_to_9999_3)))
+one_to_9999_5:=$(addprefix 0,$(one_to_9999_3)) $(one_to_9999_4)
+one_to_9999_6:=$(foreach i,$(one_to_9999_0),$(addprefix $(i),$(one_to_9999_5)))
+one_to_9999:=$(one_to_9999_0) $(one_to_9999_2) $(one_to_9999_4) $(one_to_9999_6)
+
 # The number of splits to be made for the match.pd files.
 NUM_MATCH_SPLITS = @DEFAULT_MATCHPD_PARTITIONS@
-MATCH_SPLITS_SEQ = $(shell seq 1 $(NUM_MATCH_SPLITS))
+MATCH_SPLITS_SEQ = $(wordlist 1,$(NUM_MATCH_SPLITS),$(one_to_9999))
 GIMPLE_MATCH_PD_SEQ_SRC = $(patsubst %, gimple-match-%.cc, $(MATCH_SPLITS_SEQ))
 GIMPLE_MATCH_PD_SEQ_O = $(patsubst %, gimple-match-%.o, $(MATCH_SPLITS_SEQ))
 GENERIC_MATCH_PD_SEQ_SRC = $(patsubst %, generic-match-%.cc, $(MATCH_SPLITS_SEQ))
@@ -4224,18 +4234,10 @@ $(patsubst %,%-subtargets,$(lang_checks)): check-%-subtargets:
 check_p_tool=$(firstword $(subst _, ,$*))
 check_p_count=$(check_$(check_p_tool)_parallelize)
 check_p_subno=$(word 2,$(subst _, ,$*))
-check_p_numbers0:=1 2 3 4 5 6 7 8 9
-check_p_numbers1:=0 $(check_p_numbers0)
-check_p_numbers2:=$(foreach i,$(check_p_numbers0),$(addprefix $(i),$(check_p_numbers1)))
-check_p_numbers3:=$(addprefix 0,$(check_p_numbers1)) $(check_p_numbers2)
-check_p_numbers4:=$(foreach i,$(check_p_numbers0),$(addprefix $(i),$(check_p_numbers3)))
-check_p_numbers5:=$(addprefix 0,$(check_p_numbers3)) $(check_p_numbers4)
-check_p_numbers6:=$(foreach i,$(check_p_numbers0),$(addprefix $(i),$(check_p_numbers5)))
-check_p_numbers:=$(check_p_numbers0) $(check_p_numbers2) $(check_p_numbers4) $(check_p_numbers6)
 check_p_subdir=$(subst _,,$*)
 check_p_subdirs=$(wordlist 1,$(check_p_count),$(wordlist 1, \
 		$(if $(GCC_TEST_PARALLEL_SLOTS),$(GCC_TEST_PARALLEL_SLOTS),128), \
-		$(check_p_numbers)))
+		$(one_to_9999)))
 
 # For parallelized check-% targets, this decides whether parallelization
 # is desirable (if -jN is used).  If desirable, recursive make is run with
-- 
2.44.0

https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=bc45e18d433f879a02e369d027829f90f9e85724

From b60091fe7d22e0cac71461dceeb804e37555b5d3 Mon Sep 17 00:00:00 2001
From: Tamar Christina <tamar.christina@arm.com>
Date: Mon, 12 Jun 2023 14:06:08 +0100
Subject: [PATCH 09/15] Remove DEFAULT_MATCHPD_PARTITIONS macro

As Jakub pointed out, DEFAULT_MATCHPD_PARTITIONS
is now unused and can be removed.

gcc/ChangeLog:

	* config.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Remove DEFAULT_MATCHPD_PARTITIONS.

(cherry picked from commit bc45e18d433f879a02e369d027829f90f9e85724)
---
 gcc/config.in    | 6 ------
 gcc/configure    | 9 ++-------
 gcc/configure.ac | 2 --
 3 files changed, 2 insertions(+), 15 deletions(-)

diff --git a/gcc/config.in b/gcc/config.in
index ea60c5b11fc5..5281a12a707c 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -67,12 +67,6 @@
 #endif
 
 
-/* Define to larger than one set the number of match.pd partitions to make. */
-#ifndef USED_FOR_TARGET
-#undef DEFAULT_MATCHPD_PARTITIONS
-#endif
-
-
 /* Define to larger than zero set the default stack clash protector size. */
 #ifndef USED_FOR_TARGET
 #undef DEFAULT_STK_CLASH_GUARD_SIZE
diff --git a/gcc/configure b/gcc/configure
index 542d100c2b73..cc8247037569 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -7937,11 +7937,6 @@ if (test $DEFAULT_MATCHPD_PARTITIONS -lt 1); then
 fi
 
 
-cat >>confdefs.h <<_ACEOF
-#define DEFAULT_MATCHPD_PARTITIONS $DEFAULT_MATCHPD_PARTITIONS
-_ACEOF
-
-
 
 # Enable __cxa_atexit for C++.
 # Check whether --enable-__cxa_atexit was given.
@@ -19896,7 +19891,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 19899 "configure"
+#line 19894 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -20002,7 +19997,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 20005 "configure"
+#line 20000 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 31aa8566a3e7..d02ffc22a3a3 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -954,8 +954,6 @@ if (test $DEFAULT_MATCHPD_PARTITIONS -lt 1); then
 		Cannot be negative.]))
 fi
 
-AC_DEFINE_UNQUOTED(DEFAULT_MATCHPD_PARTITIONS, $DEFAULT_MATCHPD_PARTITIONS,
-	[Define to larger than one set the number of match.pd partitions to make.])
 AC_SUBST(DEFAULT_MATCHPD_PARTITIONS)
 
 # Enable __cxa_atexit for C++.
-- 
2.44.0