Check void type before using RAUWd.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84049 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp
index 89120a6..1574115 100644
--- a/lib/Transforms/Scalar/LICM.cpp
+++ b/lib/Transforms/Scalar/LICM.cpp
@@ -487,7 +487,10 @@ void LICM::sink(Instruction &I) {
       // Instruction is not used, just delete it.
       CurAST->deleteValue(&I);
       // If I has users in unreachable blocks, eliminate.
-      I.replaceAllUsesWith(UndefValue::get(I.getType()));
+      // If I is not void type then replaceAllUsesWith undef.
+      // This allows ValueHandlers and custom metadata to adjust itself.
+      if (I.getType() != Type::getVoidTy(I.getContext()))
+        I.replaceAllUsesWith(UndefValue::get(I.getType()));
       I.eraseFromParent();
     } else {
       // Move the instruction to the start of the exit block, after any PHI
@@ -500,7 +503,10 @@ void LICM::sink(Instruction &I) {
     // The instruction is actually dead if there ARE NO exit blocks.
     CurAST->deleteValue(&I);
     // If I has users in unreachable blocks, eliminate.
-    I.replaceAllUsesWith(UndefValue::get(I.getType()));
+    // If I is not void type then replaceAllUsesWith undef.
+    // This allows ValueHandlers and custom metadata to adjust itself.
+    if (I.getType() != Type::getVoidTy(I.getContext()))
+      I.replaceAllUsesWith(UndefValue::get(I.getType()));
     I.eraseFromParent();
   } else {
     // Otherwise, if we have multiple exits, use the PromoteMem2Reg function to