[PATCH] D153400: [InstCombine] Add !noundef to match behavior of violating assume

[luxufan via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG7fc0efd0dc4d: [InstCombine] Add !noundef to match behavior of violating assume (authored by StephenFan).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D153400/new/

https://reviews.llvm.org/D153400

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
  llvm/test/Transforms/InstCombine/assume.ll


Index: llvm/test/Transforms/InstCombine/assume.ll
===================================================================
--- llvm/test/Transforms/InstCombine/assume.ll
+++ llvm/test/Transforms/InstCombine/assume.ll
@@ -266,7 +266,7 @@
 
 define i1 @nonnull1(ptr %a) {
 ; CHECK-LABEL: @nonnull1(
-; CHECK-NEXT:    [[LOAD:%.*]] = load ptr, ptr [[A:%.*]], align 8, !nonnull !6
+; CHECK-NEXT:    [[LOAD:%.*]] = load ptr, ptr [[A:%.*]], align 8, !nonnull !6, !noundef !6
 ; CHECK-NEXT:    tail call void @escape(ptr nonnull [[LOAD]])
 ; CHECK-NEXT:    ret i1 false
 ;
Index: llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
===================================================================
--- llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -2652,6 +2652,7 @@
         isValidAssumeForContext(II, LHS, &DT)) {
       MDNode *MD = MDNode::get(II->getContext(), std::nullopt);
       LHS->setMetadata(LLVMContext::MD_nonnull, MD);
+      LHS->setMetadata(LLVMContext::MD_noundef, MD);
       return RemoveConditionFromAssume(II);
 
       // TODO: apply nonnull return attributes to calls and invokes


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