[clang] [llvm] [DXIL] Remove incompatible metadata types when preparing DXIL. (PR #136386)

[Joshua Batista via cfe-commits]

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@@ -189,6 +189,26 @@ class DXILPrepareModule : public ModulePass {
       for (auto &BB : F) {
         IRBuilder<> Builder(&BB);
         for (auto &I : make_early_inc_range(BB)) {
+
+          // TODO: Audit this list - is it enough? Too much?
+          static unsigned DXILCompatibleMDs[] = {
+              LLVMContext::MD_dbg,
+              LLVMContext::MD_tbaa,
+              LLVMContext::MD_prof,
+              LLVMContext::MD_fpmath,
+              LLVMContext::MD_range,
+              LLVMContext::MD_tbaa_struct,
+              LLVMContext::MD_invariant_load,
+              LLVMContext::MD_alias_scope,
+              LLVMContext::MD_noalias,
+              LLVMContext::MD_nontemporal,
+              LLVMContext::MD_mem_parallel_loop_access,
+              LLVMContext::MD_nonnull,
+              LLVMContext::MD_dereferenceable,
+              LLVMContext::MD_dereferenceable_or_null,
+          };
+          I.dropUnknownNonDebugMetadata(DXILCompatibleMDs);
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bob80905 wrote:

https://github.com/llvm/llvm-project/issues/137386
https://github.com/llvm/llvm-project/issues/137387
Created

https://github.com/llvm/llvm-project/pull/136386