Zap dead instructions harder.

llvm-svn: 122645

1 files changed, 2 insertions, 7 deletions

diff --git a/llvm/lib/Transforms/Utils/SimplifyInstructions.cpp b/llvm/lib/Transforms/Utils/SimplifyInstructions.cpp
index 4e0078425bf..4205622037a 100644
--- a/llvm/lib/Transforms/Utils/SimplifyInstructions.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyInstructions.cpp
@@ -83,13 +83,8 @@ namespace {
 
       // Finally, run over the function zapping any dead instructions.
       for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
-        for (BasicBlock::iterator BI = BB->begin(), BE = BB->end(); BI != BE;) {
-          Instruction *I = BI++;
-          if (isInstructionTriviallyDead(I)) {
-            I->eraseFromParent();
-            Changed = true;
-          }
-        }
+        for (BasicBlock::iterator BI = BB->begin(), BE = BB->end(); BI != BE;)
+          Changed |= RecursivelyDeleteTriviallyDeadInstructions(BI++);
 
       return Changed;
     }