commit 0638c20e7c6a084e454368c072f4bbe44c571479
author Evan Cheng <evan.cheng@apple.com> Fri Jan 07 21:08:26 2011 +0000
committer Evan Cheng <evan.cheng@apple.com> Fri Jan 07 21:08:26 2011 +0000
tree b22793dee7202f40e1ef224652b90f419c009645
parent 134cde912a9ae7103d6c3bf7f2c1a6b2758b1ab3

DBG_VALUE does not have any side effects; it also makes no sense to mark it cheap as a copy.

llvm-svn: 123031

llvm/lib/CodeGen/PeepholeOptimizer.cpp

diff --git a/llvm/lib/CodeGen/PeepholeOptimizer.cpp b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
index 07c2b80..1ddfe8b 100644
--- a/llvm/lib/CodeGen/PeepholeOptimizer.cpp
+++ b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
@@ -336,7 +336,9 @@
       MachineInstr *MI = &*MII++;
       LocalMIs.insert(MI);
 
-      if (MI->getDesc().hasUnmodeledSideEffects())
+      if (MI->isLabel() || MI->isPHI() || MI->isImplicitDef() ||
+          MI->isKill() || MI->isInlineAsm() || MI->isDebugValue() ||
+          MI->getDesc().hasUnmodeledSideEffects())
         continue;
 
       if (MI->getDesc().isCompare()) {