From: Chris Lattner <sabre@nondot.org>
Date: Tue, 13 Apr 2004 19:28:20 +0000 (+0000)
Subject: Constant propagation should remove the dead instructions
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4647b7cd6929990ff174f0dd7cbfda5ab40df850;p=oota-llvm.git

Constant propagation should remove the dead instructions


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12917 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/ConstantProp.cpp b/lib/Transforms/Scalar/ConstantProp.cpp
index d9a297cdf1f..f1f7a442221 100644
--- a/lib/Transforms/Scalar/ConstantProp.cpp
+++ b/lib/Transforms/Scalar/ConstantProp.cpp
@@ -67,6 +67,10 @@ bool ConstantPropagation::runOnFunction(Function &F) {
         // Replace all of the uses of a variable with uses of the constant.
         I->replaceAllUsesWith(C);
 
+        // Remove the dead instruction.
+        WorkList.erase(I);
+        I->getParent()->getInstList().erase(I);
+
         // We made a change to the function...
         Changed = true;
         ++NumInstKilled;