user/llvm8: Move to legacy/

We don't need LLVM 8 in-tree any more.  The last dependent was Qt
Creator.  LLVM 14 is the new hotness.

Closes: #460, #871

10 files changed, 729 insertions, 0 deletions

diff --git a/legacy/llvm8/APKBUILD b/legacy/llvm8/APKBUILD
new file mode 100644
index 000000000..a7a2a44d3
--- /dev/null
+++ b/legacy/llvm8/APKBUILD
@@ -0,0 +1,241 @@
+# Contributor: Travis Tilley <ttilley@gmail.com>
+# Contributor: Mitch Tishmack <mitch.tishmack@gmail.com>
+# Contributor: Jakub Jirutka <jakub@jirutka.cz>
+# Maintainer: A. Wilcox <awilfox@adelielinux.org>
+_pkgname=llvm
+pkgver=8.0.1
+_majorver=${pkgver%%.*}
+pkgname=$_pkgname$_majorver
+pkgrel=3
+pkgdesc="Low Level Virtual Machine compiler system, version $_majorver"
+arch="all"
+options="!checkroot !dbg"
+url="https://llvm.org/"
+license="NCSA"
+depends_dev="$pkgname=$pkgver-r$pkgrel libexecinfo-dev libxml2-dev"
+makedepends="binutils-dev chrpath cmake file libexecinfo-dev libffi-dev
+	libxml2-dev python3 zlib-dev"
+subpackages="$pkgname-static $pkgname-libs $pkgname-dev
+	$pkgname-test-utils:_test_utils"
+source="https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver/llvm-$pkgver.src.tar.xz
+	llvm-fix-build-with-musl-libc.patch
+	disable-FileSystemTest.CreateDir-perms-assert.patch
+	disable-dlclose-test.patch
+	musl-ppc64-elfv2.patch
+	more-secure-plt.patch
+	even-more-secure-plt.patch
+	python3-test.patch
+	scc-insertion.patch
+	fix-memory-mf_exec-on-aarch64.patch
+	"
+builddir="$srcdir/$_pkgname-$pkgver.src"
+
+# ARM has few failures in test suite that we don't care about currently and
+# also it takes forever to run them on the builder.
+case "$CARCH" in
+	arm*) options="$options !check";;
+esac
+
+# Whether is this package the default (latest) LLVM version.
+_default_llvm="no"
+
+if [ "$_default_llvm" = yes ]; then
+	provides="llvm=$pkgver-r$pkgrel"
+	replaces="llvm"
+fi
+
+# NOTE: It seems that there's no (sane) way how to change includedir, sharedir
+# etc. separately, just the CMAKE_INSTALL_PREFIX. Standard CMake variables and
+# even  LLVM-specific variables, that are related to these paths, actually
+# don't work (in llvm 3.7).
+#
+# When building a software that depends on LLVM, utility llvm-config should be
+# used to discover where is LLVM installed. It provides options to print
+# path of bindir, includedir, and libdir separately, but in its source, all
+# these paths are actually hard-coded against INSTALL_PREFIX. We can patch it
+# and move paths manually, but I'm really not sure what it may break...
+#
+# Also note that we should *not* add version suffix to files in llvm bindir!
+# It breaks build system of some software that depends on LLVM, because they
+# don't expect these files to have a sufix.
+#
+# So, we install all the LLVM files into /usr/lib/llvm$_majorver.
+# BTW, Fedora and Debian do the same thing.
+#
+_prefix="usr/lib/llvm$_majorver"
+
+prepare() {
+	default_prepare
+
+	# https://bugs.llvm.org//show_bug.cgi?id=31870
+	rm test/tools/llvm-symbolizer/print_context.c
+}
+
+build() {
+	# Auto-detect it by guessing either.
+	local ffi_include_dir="$(pkg-config --cflags-only-I libffi | sed 's|^-I||g')"
+
+	cmake -G "Unix Makefiles" -Wno-dev \
+		-DCMAKE_BUILD_TYPE=Release \
+		-DCMAKE_INSTALL_PREFIX=/$_prefix \
+		-DCMAKE_VERBOSE_MAKEFILE=NO \
+		-DFFI_INCLUDE_DIR="$ffi_include_dir" \
+		-DLLVM_BINUTILS_INCDIR=/usr/include \
+		-DLLVM_BUILD_DOCS=OFF \
+		-DLLVM_BUILD_EXAMPLES=OFF \
+		-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON \
+		-DLLVM_BUILD_LLVM_DYLIB=ON \
+		-DLLVM_BUILD_TESTS=ON \
+		-DLLVM_DEFAULT_TARGET_TRIPLE="$CBUILD" \
+		-DLLVM_ENABLE_ASSERTIONS=OFF \
+		-DLLVM_ENABLE_CXX1Y=ON \
+		-DLLVM_ENABLE_FFI=ON \
+		-DLLVM_ENABLE_LIBCXX=OFF \
+		-DLLVM_ENABLE_PIC=ON \
+		-DLLVM_ENABLE_RTTI=ON \
+		-DLLVM_ENABLE_SPHINX=OFF \
+		-DLLVM_ENABLE_TERMINFO=ON \
+		-DLLVM_ENABLE_ZLIB=ON \
+		-DLLVM_HOST_TRIPLE="$CHOST" \
+		-DLLVM_INCLUDE_EXAMPLES=OFF \
+		-DLLVM_LINK_LLVM_DYLIB=ON \
+		-DLLVM_TARGETS_TO_BUILD='AArch64;AMDGPU;ARM;BPF;Hexagon;Lanai;Mips;MSP430;PowerPC;Sparc;SystemZ;WebAssembly;X86;XCore' \
+		-DPYTHON_EXECUTABLE=/usr/bin/python3 \
+		-Bbuild .
+
+	make -C build llvm-tblgen
+	make -C build
+
+	python3 utils/lit/setup.py build
+}
+
+check() {
+	# appears to be an issue on musl and glibc, but only fails on musl:
+	# https://github.com/NixOS/nixpkgs/blob/bb7e9e46/pkgs/development/compilers/llvm/8/llvm.nix#L74
+	rm -f "$builddir"/test/CodeGen/AArch64/wineh4.mir
+	make -C build check-llvm
+}
+
+package() {
+	make DESTDIR="$pkgdir" -C build install
+
+	cd "$pkgdir"/$_prefix
+
+	# Remove RPATHs.
+	file lib/*.so bin/* \
+		| awk -F: '$2~/ELF/{print $1}' \
+		| xargs -r chrpath -d
+
+	# Symlink files from /usr/lib/llvm*/bin to /usr/bin.
+	mkdir -p "$pkgdir"/usr/bin
+	local name newname path
+	for path in bin/*; do
+		name=${path##*/}
+		# Add version infix/suffix to the executable name.
+		case "$name" in
+			llvm-*) newname="llvm$_majorver-${name#llvm-}";;
+			*) newname="$name$_majorver";;
+		esac
+		# If this package provides=llvm (i.e. it's the default/latest
+		# llvm package), omit version infix/suffix.
+		if [ "$_default_llvm" = yes ]; then
+			newname=$name
+		fi
+		case "$name" in
+			FileCheck | obj2yaml | yaml2obj) continue;;
+		esac
+		ln -s ../lib/llvm$_majorver/bin/$name "$pkgdir"/usr/bin/$newname
+	done
+
+	# Move /usr/lib/$pkgname/include/ into /usr/include/$pkgname/
+	# and symlink it back.
+	_mv include/* "$pkgdir"/usr/include/$pkgname/
+	rmdir include
+	ln -s ../../include/$pkgname include
+
+	ln -s "$pkgdir"/usr/lib/cmake/llvm ../$pkgname/lib/cmake/llvm
+}
+
+static() {
+	pkgdesc="LLVM $_majorver static libraries"
+	_common_subpkg
+
+	_mv "$pkgdir"/$_prefix/lib/*.a "$subpkgdir"/$_prefix/lib/
+	strip -d "$subpkgdir"/$_prefix/lib/*.a
+}
+
+libs() {
+	pkgdesc="LLVM $_majorver runtime library"
+	local soname="libLLVM-$_majorver.so"
+	local soname2="libLLVM-$pkgver.so"
+	_common_subpkg
+
+	mkdir -p "$subpkgdir"
+	cd "$subpkgdir"
+
+	# libLLVM should be in /usr/lib. This is needed for binaries that are
+	# dynamically linked with libLLVM, so they can find it on default path.
+	_mv "$pkgdir"/$_prefix/lib/$soname usr/lib/
+	ln -s $soname usr/lib/$soname2
+
+	# And also symlink it back to the LLVM prefix.
+	mkdir -p $_prefix/lib
+	ln -s ../../$soname $_prefix/lib/$soname
+	ln -s ../../$soname $_prefix/lib/$soname2
+}
+
+dev() {
+	_common_subpkg
+	default_dev
+	cd "$subpkgdir"
+
+	_mv "$pkgdir"/$_prefix/lib $_prefix/
+	_mv "$pkgdir"/$_prefix/include $_prefix/
+
+	_mv "$pkgdir"/$_prefix/bin/llvm-config $_prefix/bin/
+}
+
+_test_utils() {
+	pkgdesc="LLVM $_majorver utilities for executing LLVM and Clang style test suites"
+	depends="python3"
+	_common_subpkg
+	replaces=""
+
+	local litver="$(python3 "$builddir"/utils/lit/setup.py --version 2>/dev/null \
+		| sed 's/\.dev.*$//')"
+	test -n "$litver" || return 1
+	provides="$provides lit=$litver-r$pkgrel"
+
+	cd "$builddir"/build
+
+	install -D -m 755 bin/FileCheck "$subpkgdir"/$_prefix/bin/FileCheck
+	install -D -m 755 bin/count "$subpkgdir"/$_prefix/bin/count
+	install -D -m 755 bin/not "$subpkgdir"/$_prefix/bin/not
+
+	python3 ../utils/lit/setup.py install --prefix=/usr --root="$subpkgdir"
+	ln -s ../../../bin/lit "$subpkgdir"/$_prefix/bin/lit
+}
+
+_common_subpkg() {
+	if [ "$_default_llvm" = yes ]; then
+		replaces="llvm${subpkgname#$pkgname}"
+		provides="$replaces=$pkgver-r$pkgrel"
+	fi
+}
+
+_mv() {
+	local dest; for dest; do true; done  # get last argument
+	mkdir -p "$dest"
+	mv $@
+}
+
+sha512sums="82e120be5cabdfd5111aebbea68a663fe229c8861d73802d6ab09a3bf48f60de333e07e61f8fb61beaa14ac2bea24fcd74fa6f761acaf62469f536b79fcb1e16  llvm-8.0.1.src.tar.xz
+f84cd65d7042e89826ba6e8d48c4c302bf4980da369d7f19a55f217e51c00ca8ed178d453df3a3cee76598a7cecb94aed0775a6d24fe73266f82749913fc3e71  llvm-fix-build-with-musl-libc.patch
+49c47f125014b60d0ea7870f981a2c1708ad705793f89287ed846ee881a837a4dc0170bf467e03f2ef56177473128945287749ac80dc2d13cfabcf8b929ba58a  disable-FileSystemTest.CreateDir-perms-assert.patch
+caeec8e4dbd92f5f74940780b69075f3879a267a8623822cbdc193fd14706eb089071e3a5a20d60cc2eca59e4c5b2a61d29827a2f3362ee7c5f74f11d9ace200  disable-dlclose-test.patch
+e5ddbc4b6c4928e79846dc3c022eb7928aaa8fed40515c78f5f03b8ab8264f34f1eb8aa8bfc0f436450932f4917e54ad261603032092ea271d9590f11a37cf1e  musl-ppc64-elfv2.patch
+7ba7f5b396e1afb49ea53fdc16729f0709fbba88de433cc8a8e2f751d13733011d4121318f68d7f8a16a6c57c3a1bee727cc3e0da0f5c6cae38eff70d3a539cf  more-secure-plt.patch
+deb71762721ebc73bfdf23143b582f40c70eddcef3e337ed14499e8e336bee2906292d38d64fe98fa633430c1bcb66cf6a2e067258c8fbe6e931f99f6d10a6f7  even-more-secure-plt.patch
+53cc0d13dd871e9b775bb4e7567de4f9a97d91b8246cd7ce74607fd88d6e3e2ab9455f5b4195bc7f9dbdedbc77d659d43e98ec0b7cd78cd395aaea6919510287  python3-test.patch
+4422a83ea953a6b30cb447a448d246956abd6b0cbd2451247e5f2c41318b2c0d18c7b6781155ea40a5558bbd66e9e1482cec0875d95776545fd0d87356b5e4bd  scc-insertion.patch
+c9ef3cd95c4bd1d6ac69bbcd471b01755126d00f59d27d4a2a2ef5623943be73f8407e2fd731294d1a9d81a66e459f45f3f1d5dc5f9646f4f2fb2d8d891b5279  fix-memory-mf_exec-on-aarch64.patch"
diff --git a/legacy/llvm8/disable-FileSystemTest.CreateDir-perms-assert.patch b/legacy/llvm8/disable-FileSystemTest.CreateDir-perms-assert.patch
new file mode 100644
index 000000000..e73ce9b6f
--- /dev/null
+++ b/legacy/llvm8/disable-FileSystemTest.CreateDir-perms-assert.patch
@@ -0,0 +1,61 @@
+Do not assert permissions of file created in /tmp directory.
+
+This assertion fails, probably due to some specific setup of /tmp
+on build servers.
+
+    FAIL: LLVM-Unit :: Support/SupportTests/FileSystemTest.CreateDir (1293 of 17222)
+    ******************** TEST 'LLVM-Unit :: Support/SupportTests/FileSystemTest.CreateDir' FAILED ********************
+    Note: Google Test filter = FileSystemTest.CreateDir
+    [==========] Running 1 test from 1 test case.
+    [----------] Global test environment set-up.
+    [----------] 1 test from FileSystemTest
+    [ RUN      ] FileSystemTest.CreateDir
+    /home/buildozer/aports/testing/llvm3.9/src/llvm-3.9.1.src/unittests/Support/Path.cpp:591: Failure
+    Value of: fs::perms::owner_read | fs::perms::owner_exe
+      Actual: 320
+    Expected: Status.permissions() & fs::perms::all_all
+    Which is: 448
+
+--- a/unittests/Support/Path.cpp
++++ b/unittests/Support/Path.cpp
+@@ -579,23 +579,23 @@
+   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
+ 
+ #ifdef LLVM_ON_UNIX
+-  // Set a 0000 umask so that we can test our directory permissions.
+-  mode_t OldUmask = ::umask(0000);
+-
+-  fs::file_status Status;
+-  ASSERT_NO_ERROR(
+-      fs::create_directory(Twine(TestDirectory) + "baz500", false,
+-                           fs::perms::owner_read | fs::perms::owner_exe));
+-  ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz500", Status));
+-  ASSERT_EQ(Status.permissions() & fs::perms::all_all,
+-            fs::perms::owner_read | fs::perms::owner_exe);
+-  ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "baz777", false,
+-                                       fs::perms::all_all));
+-  ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz777", Status));
+-  ASSERT_EQ(Status.permissions() & fs::perms::all_all, fs::perms::all_all);
+-
+-  // Restore umask to be safe.
+-  ::umask(OldUmask);
++//  // Set a 0000 umask so that we can test our directory permissions.
++//  mode_t OldUmask = ::umask(0000);
++//
++//  fs::file_status Status;
++//  ASSERT_NO_ERROR(
++//      fs::create_directory(Twine(TestDirectory) + "baz500", false,
++//                           fs::perms::owner_read | fs::perms::owner_exe));
++//  ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz500", Status));
++//  ASSERT_EQ(Status.permissions() & fs::perms::all_all,
++//            fs::perms::owner_read | fs::perms::owner_exe);
++//  ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "baz777", false,
++//                                       fs::perms::all_all));
++//  ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz777", Status));
++//  ASSERT_EQ(Status.permissions() & fs::perms::all_all, fs::perms::all_all);
++//
++//  // Restore umask to be safe.
++//  ::umask(OldUmask);
+ #endif
+ 
+ #ifdef LLVM_ON_WIN32
diff --git a/legacy/llvm8/disable-dlclose-test.patch b/legacy/llvm8/disable-dlclose-test.patch
new file mode 100644
index 000000000..b70cd4d4d
--- /dev/null
+++ b/legacy/llvm8/disable-dlclose-test.patch
@@ -0,0 +1,18 @@
+--- llvm-6.0.1.src/unittests/Support/DynamicLibrary/DynamicLibraryTest.cpp.old	2017-07-12 21:22:45.000000000 +0000
++++ llvm-6.0.1.src/unittests/Support/DynamicLibrary/DynamicLibraryTest.cpp	2018-09-13 04:43:37.240000000 +0000
+@@ -107,6 +107,7 @@
+   EXPECT_TRUE(DynamicLibrary::SearchOrder == DynamicLibrary::SO_Linker);
+ }
+ 
++#if 0
+ TEST(DynamicLibrary, Shutdown) {
+   std::string A("PipSqueak"), B, C("SecondLib");
+   std::vector<std::string> Order;
+@@ -162,6 +163,7 @@
+   EXPECT_EQ(Order.front(), "SecondLib");
+   EXPECT_EQ(Order.back(), "PipSqueak");
+ }
++#endif
+ 
+ #else
+ 
diff --git a/legacy/llvm8/even-more-secure-plt.patch b/legacy/llvm8/even-more-secure-plt.patch
new file mode 100644
index 000000000..112e111b8
--- /dev/null
+++ b/legacy/llvm8/even-more-secure-plt.patch
@@ -0,0 +1,101 @@
+Index: lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
+===================================================================
+--- a/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
++++ b/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
+@@ -442,13 +442,22 @@
+   // On PPC64, VariantKind is VK_None, but on PPC32, it's VK_PLT, and it must
+   // come at the _end_ of the expression.
+   const MCOperand &Op = MI->getOperand(OpNo);
+-  const MCSymbolRefExpr &refExp = cast<MCSymbolRefExpr>(*Op.getExpr());
+-  O << refExp.getSymbol().getName();
++  const MCSymbolRefExpr *RefExp = nullptr;
++  const MCConstantExpr *ConstExp = nullptr;
++  if (const MCBinaryExpr *BinExpr = dyn_cast<MCBinaryExpr>(Op.getExpr())) {
++    RefExp = cast<MCSymbolRefExpr>(BinExpr->getLHS());
++    ConstExp = cast<MCConstantExpr>(BinExpr->getRHS());
++  } else
++    RefExp = cast<MCSymbolRefExpr>(Op.getExpr());
++
++  O << RefExp->getSymbol().getName();
+   O << '(';
+   printOperand(MI, OpNo+1, O);
+   O << ')';
+-  if (refExp.getKind() != MCSymbolRefExpr::VK_None)
+-    O << '@' << MCSymbolRefExpr::getVariantKindName(refExp.getKind());
++  if (RefExp->getKind() != MCSymbolRefExpr::VK_None)
++    O << '@' << MCSymbolRefExpr::getVariantKindName(RefExp->getKind());
++  if (ConstExp != nullptr)
++    O << '+' << ConstExp->getValue();
+ }
+ 
+ /// showRegistersWithPercentPrefix - Check if this register name should be
+Index: lib/Target/PowerPC/PPCAsmPrinter.cpp
+===================================================================
+--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
++++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
+@@ -487,8 +487,14 @@
+   if (!Subtarget->isPPC64() && !Subtarget->isDarwin() &&
+       isPositionIndependent())
+     Kind = MCSymbolRefExpr::VK_PLT;
+-  const MCSymbolRefExpr *TlsRef =
++  const MCExpr *TlsRef =
+     MCSymbolRefExpr::create(TlsGetAddr, Kind, OutContext);
++
++  // Add 32768 offset to the symbol so we follow up the latest GOT/PLT ABI.
++  if (Kind == MCSymbolRefExpr::VK_PLT && Subtarget->isSecurePlt())
++    TlsRef = MCBinaryExpr::createAdd(TlsRef,
++                                     MCConstantExpr::create(32768, OutContext),
++                                     OutContext);
+   const MachineOperand &MO = MI->getOperand(2);
+   const GlobalValue *GValue = MO.getGlobal();
+   MCSymbol *MOSymbol = getSymbol(GValue);
+Index: lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+===================================================================
+--- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
++++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+@@ -4054,7 +4054,20 @@
+     if (trySETCC(N))
+       return;
+     break;
+-
++  // These nodes will be transformed into GETtlsADDR32 node, which
++  // later becomes BL_TLS __tls_get_addr(sym at tlsgd)@PLT
++  case PPCISD::ADDI_TLSLD_L_ADDR:
++  case PPCISD::ADDI_TLSGD_L_ADDR: {
++    const Module *Mod = MF->getFunction().getParent();
++    if (PPCLowering->getPointerTy(CurDAG->getDataLayout()) != MVT::i32 ||
++        !PPCSubTarget->isSecurePlt() || !PPCSubTarget->isTargetELF() ||
++        Mod->getPICLevel() == PICLevel::SmallPIC)
++      break;
++      // Attach global base pointer on GETtlsADDR32 node in order to
++      // generate secure plt code for TLS symbols.
++      getGlobalBaseReg();
++  }
++    break;
+   case PPCISD::CALL: {
+     const Module *M = MF->getFunction().getParent();
+ 
+Index: test/CodeGen/PowerPC/ppc32-secure-plt-tls.ll
+===================================================================
+--- a/test/CodeGen/PowerPC/ppc32-secure-plt-tls.ll
++++ b/test/CodeGen/PowerPC/ppc32-secure-plt-tls.ll
+@@ -0,0 +1,18 @@
++; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu -mattr=+secure-plt -relocation-model=pic | FileCheck -check-prefix=SECURE-PLT-TLS %s
++
++@a = thread_local local_unnamed_addr global i32 6, align 4
++define i32 @main() local_unnamed_addr #0 {
++entry:
++  %0 = load i32, i32* @a, align 4
++  ret i32 %0
++}
++
++
++!llvm.module.flags = !{!0}
++!0 = !{i32 7, !"PIC Level", i32 2}
++
++; SECURE-PLT-TLS:       mflr 30
++; SECURE-PLT-TLS-NEXT:  addis 30, 30, .LTOC-.L0$pb@ha
++; SECURE-PLT-TLS-NEXT:  addi 30, 30, .LTOC-.L0$pb@l
++; SECURE-PLT-TLS-NEXT:  bl .L{{.*}}
++; SECURE-PLT-TLS:       bl __tls_get_addr(a@tlsgd)@PLT+32768
+\ No newline at end of file
diff --git a/legacy/llvm8/fix-memory-mf_exec-on-aarch64.patch b/legacy/llvm8/fix-memory-mf_exec-on-aarch64.patch
new file mode 100644
index 000000000..a70b39733
--- /dev/null
+++ b/legacy/llvm8/fix-memory-mf_exec-on-aarch64.patch
@@ -0,0 +1,33 @@
+Fix failures in AllocationTests/MappedMemoryTest.* on aarch64:
+
+    Failing Tests (8):
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.AllocAndRelease/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.DuplicateNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.EnabledWrite/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.MultipleAllocAndRelease/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.SuccessiveNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.UnalignedNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.ZeroNear/3
+        LLVM-Unit :: Support/./SupportTests/AllocationTests/MappedMemoryTest.ZeroSizeNear/3
+
+Upstream-Issue: https://bugs.llvm.org/show_bug.cgi?id=14278#c10
+
+--- a/lib/Support/Unix/Memory.inc
++++ b/lib/Support/Unix/Memory.inc
+@@ -54,7 +54,7 @@
+       llvm::sys::Memory::MF_EXEC:
+     return PROT_READ | PROT_WRITE | PROT_EXEC;
+   case llvm::sys::Memory::MF_EXEC:
+-#if defined(__FreeBSD__)
++#if defined(__FreeBSD__) || (defined(__linux__) && (defined(__aarch64__) || defined(__powerpc64__)))
+     // On PowerPC, having an executable page that has no read permission
+     // can have unintended consequences.  The function InvalidateInstruction-
+     // Cache uses instructions dcbf and icbi, both of which are treated by
+@@ -62,6 +62,7 @@
+     // executing these instructions will result in a segmentation fault.
+     // Somehow, this problem is not present on Linux, but it does happen
+     // on FreeBSD.
++    // The same problem is present even on aarch64 Linux (at least on musl).
+     return PROT_READ | PROT_EXEC;
+ #else
+     return PROT_EXEC;
diff --git a/legacy/llvm8/llvm-fix-build-with-musl-libc.patch b/legacy/llvm8/llvm-fix-build-with-musl-libc.patch
new file mode 100644
index 000000000..6ee91ea44
--- /dev/null
+++ b/legacy/llvm8/llvm-fix-build-with-musl-libc.patch
@@ -0,0 +1,46 @@
+From 5c571082fdaf61f6df19d9b7137dc26d71334058 Mon Sep 17 00:00:00 2001
+From: Natanael Copa <ncopa@alpinelinux.org>
+Date: Thu, 18 Feb 2016 10:33:04 +0100
+Subject: [PATCH 2/3] Fix build with musl libc
+
+On musl libc the fopen64 and fopen are the same thing, but for
+compatibility they have a `#define fopen64 fopen`. Same applies for
+fseek64, fstat64, fstatvfs64, ftello64, lstat64, stat64 and tmpfile64.
+---
+ include/llvm/Analysis/TargetLibraryInfo.h | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/include/llvm/Analysis/TargetLibraryInfo.h b/include/llvm/Analysis/TargetLibraryInfo.h
+index 7becdf0..7f14427 100644
+--- a/include/llvm/Analysis/TargetLibraryInfo.h
++++ b/include/llvm/Analysis/TargetLibraryInfo.h
+@@ -18,6 +18,26 @@
+ #include "llvm/IR/Module.h"
+ #include "llvm/Pass.h"
+ 
++#undef fopen64
++#undef fseeko64
++#undef fstat64
++#undef fstatvfs64
++#undef ftello64
++#undef lstat64
++#undef stat64
++#undef tmpfile64
++#undef F_GETLK64
++#undef F_SETLK64
++#undef F_SETLKW64
++#undef flock64
++#undef open64
++#undef openat64
++#undef creat64
++#undef lockf64
++#undef posix_fadvise64
++#undef posix_fallocate64
++#undef off64_t
++
+ namespace llvm {
+ /// VecDesc - Describes a possible vectorization of a function.
+ /// Function 'VectorFnName' is equivalent to 'ScalarFnName' vectorized
+-- 
+2.7.3
+
diff --git a/legacy/llvm8/more-secure-plt.patch b/legacy/llvm8/more-secure-plt.patch
new file mode 100644
index 000000000..8b18a6db2
--- /dev/null
+++ b/legacy/llvm8/more-secure-plt.patch
@@ -0,0 +1,145 @@
+--- llvm/lib/Target/PowerPC/PPCISelLowering.cpp
++++ llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+@@ -2769,8 +2769,12 @@ SDValue PPCTargetLowering::LowerGlobalTLSAddress(SDValue Op,
+       SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
+       GOTPtr = DAG.getNode(PPCISD::ADDIS_GOT_TPREL_HA, dl,
+                            PtrVT, GOTReg, TGA);
+-    } else
+-      GOTPtr = DAG.getNode(PPCISD::PPC32_GOT, dl, PtrVT);
++    } else {
++      if (isPositionIndependent())
++        GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
++      else
++        GOTPtr = DAG.getNode(PPCISD::PPC32_GOT, dl, PtrVT);
++    }
+     SDValue TPOffset = DAG.getNode(PPCISD::LD_GOT_TPREL_L, dl,
+                                    PtrVT, TGA, GOTPtr);
+     return DAG.getNode(PPCISD::ADD_TLS, dl, PtrVT, TPOffset, TGATLS);
+@@ -4941,7 +4945,8 @@ PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag, SDValue &Chain,
+   if (auto *G = dyn_cast<GlobalAddressSDNode>(Callee))
+     GV = G->getGlobal();
+   bool Local = TM.shouldAssumeDSOLocal(*Mod, GV);
+-  bool UsePlt = !Local && Subtarget.isTargetELF() && !isPPC64;
++  bool UsePlt = !Local && Subtarget.isTargetELF() && !isPPC64 &&
++                TM.isPositionIndependent();
+ 
+   if (isFunctionGlobalAddress(Callee)) {
+     GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Callee);
+--- llvm/lib/Target/PowerPC/PPCSubtarget.cpp
++++ llvm/lib/Target/PowerPC/PPCSubtarget.cpp
+@@ -138,7 +138,8 @@ void PPCSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
+   if (isDarwin())
+     HasLazyResolverStubs = true;
+ 
+-  if (TargetTriple.isOSNetBSD() || TargetTriple.isOSOpenBSD())
++  if (TargetTriple.isOSNetBSD() || TargetTriple.isOSOpenBSD() ||
++      TargetTriple.isMusl())
+     SecurePlt = true;
+ 
+   if (HasSPE && IsPPC64)
+--- llvm/test/CodeGen/PowerPC/2008-10-28-f128-i32.ll
++++ llvm/test/CodeGen/PowerPC/2008-10-28-f128-i32.ll
+@@ -62,7 +62,7 @@ define i64 @__fixunstfdi(ppc_fp128 %a) nounwind readnone {
+ ; CHECK-NEXT:    lfd 4, 328(1)
+ ; CHECK-NEXT:    fmr 1, 31
+ ; CHECK-NEXT:    fmr 2, 30
+-; CHECK-NEXT:    bl __gcc_qmul@PLT
++; CHECK-NEXT:    bl __gcc_qmul
+ ; CHECK-NEXT:    lis 3, 16864
+ ; CHECK-NEXT:    stfd 1, 280(1)
+ ; CHECK-NEXT:    fmr 29, 1
+@@ -84,7 +84,7 @@ define i64 @__fixunstfdi(ppc_fp128 %a) nounwind readnone {
+ ; CHECK-NEXT:    lfd 4, 360(1)
+ ; CHECK-NEXT:    lfd 1, 352(1)
+ ; CHECK-NEXT:    lfd 2, 344(1)
+-; CHECK-NEXT:    bl __gcc_qsub@PLT
++; CHECK-NEXT:    bl __gcc_qsub
+ ; CHECK-NEXT:    mffs 0
+ ; CHECK-NEXT:    mtfsb1 31
+ ; CHECK-NEXT:    lis 3, .LCPI0_1@ha
+@@ -117,7 +117,7 @@ define i64 @__fixunstfdi(ppc_fp128 %a) nounwind readnone {
+ ; CHECK-NEXT:  .LBB0_5: # %bb1
+ ; CHECK-NEXT:    li 4, 0
+ ; CHECK-NEXT:    mr 3, 30
+-; CHECK-NEXT:    bl __floatditf@PLT
++; CHECK-NEXT:    bl __floatditf
+ ; CHECK-NEXT:    lis 3, 17392
+ ; CHECK-NEXT:    stfd 1, 208(1)
+ ; CHECK-NEXT:    fmr 29, 1
+@@ -140,7 +140,7 @@ define i64 @__fixunstfdi(ppc_fp128 %a) nounwind readnone {
+ ; CHECK-NEXT:    lfd 4, 232(1)
+ ; CHECK-NEXT:    lfd 1, 224(1)
+ ; CHECK-NEXT:    lfd 2, 216(1)
+-; CHECK-NEXT:    bl __gcc_qadd@PLT
++; CHECK-NEXT:    bl __gcc_qadd
+ ; CHECK-NEXT:    blt 2, .LBB0_7
+ ; CHECK-NEXT:  # %bb.6: # %bb1
+ ; CHECK-NEXT:    fmr 2, 28
+@@ -163,7 +163,7 @@ define i64 @__fixunstfdi(ppc_fp128 %a) nounwind readnone {
+ ; CHECK-NEXT:    stw 3, 248(1)
+ ; CHECK-NEXT:    lfd 3, 256(1)
+ ; CHECK-NEXT:    lfd 4, 248(1)
+-; CHECK-NEXT:    bl __gcc_qsub@PLT
++; CHECK-NEXT:    bl __gcc_qsub
+ ; CHECK-NEXT:    stfd 2, 176(1)
+ ; CHECK-NEXT:    fcmpu 0, 2, 27
+ ; CHECK-NEXT:    stfd 1, 168(1)
+@@ -205,7 +205,7 @@ define i64 @__fixunstfdi(ppc_fp128 %a) nounwind readnone {
+ ; CHECK-NEXT:    lfd 4, 72(1)
+ ; CHECK-NEXT:    lfd 1, 64(1)
+ ; CHECK-NEXT:    lfd 2, 56(1)
+-; CHECK-NEXT:    bl __gcc_qsub@PLT
++; CHECK-NEXT:    bl __gcc_qsub
+ ; CHECK-NEXT:    mffs 0
+ ; CHECK-NEXT:    mtfsb1 31
+ ; CHECK-NEXT:    lis 3, .LCPI0_2@ha
+@@ -260,7 +260,7 @@ define i64 @__fixunstfdi(ppc_fp128 %a) nounwind readnone {
+ ; CHECK-NEXT:    lfd 4, 136(1)
+ ; CHECK-NEXT:    lfd 1, 128(1)
+ ; CHECK-NEXT:    lfd 2, 120(1)
+-; CHECK-NEXT:    bl __gcc_qsub@PLT
++; CHECK-NEXT:    bl __gcc_qsub
+ ; CHECK-NEXT:    mffs 0
+ ; CHECK-NEXT:    mtfsb1 31
+ ; CHECK-NEXT:    lis 3, .LCPI0_0@ha
+--- llvm/test/CodeGen/PowerPC/2010-02-12-saveCR.ll
++++ llvm/test/CodeGen/PowerPC/2010-02-12-saveCR.ll
+@@ -11,7 +11,7 @@ entry:
+ ; CHECK-DAG: ori [[T2:[0-9]+]], [[T2]], 34492
+ ; CHECK-DAG: stwx [[T1]], 1, [[T2]]
+ ; CHECK-DAG: addi 3, 1, 28
+-; CHECK: bl bar@PLT
++; CHECK: bl bar
+   %x = alloca [100000 x i8]                       ; <[100000 x i8]*> [#uses=1]
+   %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+   %x1 = bitcast [100000 x i8]* %x to i8*          ; <i8*> [#uses=1]
+--- llvm/test/CodeGen/PowerPC/available-externally.ll
++++ llvm/test/CodeGen/PowerPC/available-externally.ll
+@@ -14,7 +14,7 @@ target triple = "powerpc-unknown-linux-gnu"
+ define i32 @foo(i64 %x) nounwind {
+ entry:
+ ; STATIC: foo:
+-; STATIC: bl exact_log2@PLT
++; STATIC: bl exact_log2
+ ; STATIC: blr
+ 
+ ; PIC: foo:
+--- llvm/test/CodeGen/PowerPC/stubs.ll
++++ llvm/test/CodeGen/PowerPC/stubs.ll
+@@ -6,4 +6,4 @@ entry:
+ }
+ 
+ ; CHECK: test1:
+-; CHECK: bl __floatditf@PLT
++; CHECK: bl __floatditf
+--- llvm/test/CodeGen/PowerPC/umulo-128-legalisation-lowering.ll
++++ llvm/test/CodeGen/PowerPC/umulo-128-legalisation-lowering.ll
+@@ -72,7 +72,7 @@ define { i128, i8 } @muloti_test(i128 %l, i128 %r) unnamed_addr #0 {
+ ; PPC32-NEXT: mr 28, 9
+ ; PPC32-NEXT: mr 23, 6
+ ; PPC32-NEXT: mr 24, 5
+-; PPC32-NEXT: bl __multi3@PLT
++; PPC32-NEXT: bl __multi3
+ ; PPC32-NEXT: mr 7, 4
+ ; PPC32-NEXT: mullw 4, 24, 30
+ ; PPC32-NEXT: mullw 8, 29, 23
diff --git a/legacy/llvm8/musl-ppc64-elfv2.patch b/legacy/llvm8/musl-ppc64-elfv2.patch
new file mode 100644
index 000000000..016be5dad
--- /dev/null
+++ b/legacy/llvm8/musl-ppc64-elfv2.patch
@@ -0,0 +1,43 @@
+From 750d323a6060ad92c3d247f85d6555041f55b4a5 Mon Sep 17 00:00:00 2001
+From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
+Date: Thu, 4 Oct 2018 15:26:59 -0500
+Subject: [PATCH] Add support for powerpc64-*-linux-musl targets
+
+This patch ensures that 64-bit PowerPC musl targets use ELFv2 ABI on both
+endians.  It additionally adds a test that big endian PPC64 uses ELFv2 on
+musl.
+---
+ lib/Target/PowerPC/PPCTargetMachine.cpp | 4 ++++
+ test/CodeGen/PowerPC/ppc64-elf-abi.ll   | 1 +
+ 2 files changed, 5 insertions(+)
+
+diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp
+index 34410393ef6..c583fba8cab 100644
+--- a/lib/Target/PowerPC/PPCTargetMachine.cpp
++++ b/lib/Target/PowerPC/PPCTargetMachine.cpp
+@@ -199,6 +199,10 @@ static PPCTargetMachine::PPCABI computeTargetABI(const Triple &TT,
+   case Triple::ppc64le:
+     return PPCTargetMachine::PPC_ABI_ELFv2;
+   case Triple::ppc64:
++    // musl uses ELFv2 ABI on both endians.
++    if (TT.getEnvironment() == Triple::Musl)
++      return PPCTargetMachine::PPC_ABI_ELFv2;
++
+     return PPCTargetMachine::PPC_ABI_ELFv1;
+   default:
+     return PPCTargetMachine::PPC_ABI_UNKNOWN;
+diff --git a/test/CodeGen/PowerPC/ppc64-elf-abi.ll b/test/CodeGen/PowerPC/ppc64-elf-abi.ll
+index 1e17930304b..aa594b37b47 100644
+--- a/test/CodeGen/PowerPC/ppc64-elf-abi.ll
++++ b/test/CodeGen/PowerPC/ppc64-elf-abi.ll
+@@ -1,6 +1,7 @@
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -target-abi elfv1 < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -target-abi elfv2 < %s | FileCheck %s -check-prefix=CHECK-ELFv2
++; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-musl < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv1 < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+ ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv2 < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+-- 
+2.18.0
+
diff --git a/legacy/llvm8/python3-test.patch b/legacy/llvm8/python3-test.patch
new file mode 100644
index 000000000..746313317
--- /dev/null
+++ b/legacy/llvm8/python3-test.patch
@@ -0,0 +1,8 @@
+--- llvm-7.0.1.src/test/BugPoint/compile-custom.ll.py.old	2014-03-13 00:10:37.000000000 +0000
++++ llvm-7.0.1.src/test/BugPoint/compile-custom.ll.py	2019-03-10 03:48:48.600000000 +0000
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/env python3
+ 
+ import sys
+ 
diff --git a/legacy/llvm8/scc-insertion.patch b/legacy/llvm8/scc-insertion.patch
new file mode 100644
index 000000000..b2d7d511a
--- /dev/null
+++ b/legacy/llvm8/scc-insertion.patch
@@ -0,0 +1,33 @@
+From f7e9f4f4c50245d10ca9869a9f8f3d431dfb6948 Mon Sep 17 00:00:00 2001
+From: Warren Ristow <warren_ristow@playstation.sony.com>
+Date: Tue, 14 Jan 2020 10:30:24 -0800
+Subject: [PATCH] SCC: Allow ReplaceNode to safely support insertion
+
+If scc_iterator::ReplaceNode is inserting a new entry in the map,
+rather than replacing an existing entry, the possibility of growing
+the map could cause a failure.  This change safely implements the
+insertion.
+
+Reviewed By: probinson
+
+Differential Revision: https://reviews.llvm.org/D72469
+---
+ include/llvm/ADT/SCCIterator.h | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/include/llvm/ADT/SCCIterator.h b/include/llvm/ADT/SCCIterator.h
+index eb1a5d0938cf..1e642b9f75d3 100644
+--- a/include/llvm/ADT/SCCIterator.h
++++ b/include/llvm/ADT/SCCIterator.h
+@@ -134,7 +134,10 @@ class scc_iterator : public iterator_facade_base<
+   /// has been deleted, and \c New is to be used in its place.
+   void ReplaceNode(NodeRef Old, NodeRef New) {
+     assert(nodeVisitNumbers.count(Old) && "Old not in scc_iterator?");
+-    nodeVisitNumbers[New] = nodeVisitNumbers[Old];
++    // Do the assignment in two steps, in case 'New' is not yet in the map, and
++    // inserting it causes the map to grow.
++    auto tempVal = nodeVisitNumbers[Old];
++    nodeVisitNumbers[New] = tempVal;
+     nodeVisitNumbers.erase(Old);
+   }
+ };