user/llvm14: Fix GCC 13-adjacent bugs

Backport the GCC miscompile workaround from LLVM 18.

Use the old x87 excess precision behaviour to fix most of the tests.
Still no idea why 32-bit Intel wants new shiny colours for the graph.

Closes: #1200, #1202, #1204, #1223

1 files changed, 22 insertions, 0 deletions

diff --git a/user/llvm14/ppc-gcc-bug.patch b/user/llvm14/ppc-gcc-bug.patch
new file mode 100644
index 000000000..4fe2f34f4
--- /dev/null
+++ b/user/llvm14/ppc-gcc-bug.patch
@@ -0,0 +1,22 @@
+Upstream: https://github.com/llvm/llvm-project/issues/95594
+Ref: #1204
+
+--- llvm/include/llvm/ExecutionEngine/Orc/Shared/SimplePackedSerialization.h.old	2024-06-15 12:21:32.000000000 -0500
++++ llvm/include/llvm/ExecutionEngine/Orc/Shared/SimplePackedSerialization.h	2024-06-25 21:42:07.495284340 -0500
+@@ -378,6 +378,8 @@
+     return Size;
+   }
+ 
++#pragma GCC push_options
++#pragma GCC optimize("no-tree-ch")
+   static bool serialize(SPSOutputBuffer &OB, const SequenceT &S) {
+     if (!SPSArgList<uint64_t>::serialize(OB, static_cast<uint64_t>(S.size())))
+       return false;
+@@ -386,6 +388,7 @@
+         return false;
+     return true;
+   }
++#pragma GCC pop_options
+ 
+   static bool deserialize(SPSInputBuffer &IB, SequenceT &S) {
+     using TBSD = TrivialSPSSequenceDeserialization<SPSElementTagT, SequenceT>;