From: Dale Johannesen <dalej@apple.com>
Date: Tue, 3 Mar 2009 23:30:00 +0000 (+0000)
Subject: Marking debug info intrinsics as not touching memory
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=127a7936dea7b86e5cad337ad4b537bc115c2588;p=oota-llvm.git

Marking debug info intrinsics as not touching memory
caused them to be considered trivially dead.  Fix this.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65979 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index 38809e5e1d7..d2cbec0226e 100644
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -159,6 +159,9 @@ bool llvm::ConstantFoldTerminator(BasicBlock *BB) {
 bool llvm::isInstructionTriviallyDead(Instruction *I) {
   if (!I->use_empty() || isa<TerminatorInst>(I)) return false;
 
+  // We don't want debug info removed by anything this general.
+  if (isa<DbgInfoIntrinsic>(I)) return false;
+    
   if (!I->mayWriteToMemory())
     return true;