[PATCH] D76976: Make NewGVN aware of aligned_alloc

[Uday Bondhugula via Phabricator via llvm-commits]

bondhugula created this revision.
bondhugula added reviewers: jdoerfert, xbolva00.
Herald added subscribers: llvm-commits, hiraditya, Prazek.
Herald added a project: LLVM.

Make the New GVN pass aware of aligned_alloc.

Signed-off-by: Uday Bondhugula <uday at polymagelabs.com>

Depends on D76975 <https://reviews.llvm.org/D76975>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D76976

Files:
  llvm/lib/Transforms/Scalar/NewGVN.cpp


Index: llvm/lib/Transforms/Scalar/NewGVN.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/NewGVN.cpp
+++ llvm/lib/Transforms/Scalar/NewGVN.cpp
@@ -1470,7 +1470,8 @@
   // undef value.  This can happen when loading for a fresh allocation with no
   // intervening stores, for example.  Note that this is only true in the case
   // that the result of the allocation is pointer equal to the load ptr.
-  if (isa<AllocaInst>(DepInst) || isMallocLikeFn(DepInst, TLI)) {
+  if (isa<AllocaInst>(DepInst) || isMallocLikeFn(DepInst, TLI) ||
+      isAlignedAllocLikeFn(DepInst, TLI)) {
     return createConstantExpression(UndefValue::get(LoadType));
   }
   // If this load occurs either right after a lifetime begin,


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