[PATCH] D106017: [InstCombine] Look through invariant group intrinsics when removing malloc

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks updated this revision to Diff 358751.
aeubanks added a comment.

precommit test


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D106017/new/

https://reviews.llvm.org/D106017

Files:
  llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
  llvm/test/Transforms/InstCombine/malloc-free-delete.ll


Index: llvm/test/Transforms/InstCombine/malloc-free-delete.ll
===================================================================
--- llvm/test/Transforms/InstCombine/malloc-free-delete.ll
+++ llvm/test/Transforms/InstCombine/malloc-free-delete.ll
@@ -440,11 +440,6 @@
 
 define void @test17() {
 ; CHECK-LABEL: @test17(
-; CHECK-NEXT:    [[NW1:%.*]] = call dereferenceable(32) i8* @_Znwm(i64 32) #[[ATTR10]]
-; CHECK-NEXT:    [[NW2:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* nonnull [[NW1]])
-; CHECK-NEXT:    [[TMP1:%.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* nonnull [[NW1]])
-; CHECK-NEXT:    store i8 1, i8* [[TMP1]], align 1
-; CHECK-NEXT:    call void @_ZdlPv(i8* [[NW2]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret void
 ;
   %nw1 = call i8* @_Znwm(i64 32) builtin
Index: llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
===================================================================
--- llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -2600,6 +2600,11 @@
           case Intrinsic::objectsize:
             Users.emplace_back(I);
             continue;
+          case Intrinsic::launder_invariant_group:
+          case Intrinsic::strip_invariant_group:
+            Users.emplace_back(I);
+            Worklist.push_back(I);
+            continue;
           }
         }
 


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