From 7b3392326c40c3c20697816acae597ba7b3144eb Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Thu, 20 Oct 2011 21:10:27 +0000
Subject: Vendor import of llvm release_30 branch r142614:
 http://llvm.org/svn/llvm-project/llvm/branches/release_30@142614

---
 lib/CodeGen/PeepholeOptimizer.cpp | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

(limited to 'lib/CodeGen/PeepholeOptimizer.cpp')

diff --git a/lib/CodeGen/PeepholeOptimizer.cpp b/lib/CodeGen/PeepholeOptimizer.cpp
index c523e39..bbc7ce2 100644
--- a/lib/CodeGen/PeepholeOptimizer.cpp
+++ b/lib/CodeGen/PeepholeOptimizer.cpp
@@ -295,7 +295,6 @@ bool PeepholeOptimizer::OptimizeBitcastInstr(MachineInstr *MI,
   if (!DefMI || !DefMI->getDesc().isBitcast())
     return false;
 
-  unsigned SrcDef = 0;
   unsigned SrcSrc = 0;
   NumDefs = DefMI->getDesc().getNumDefs();
   NumSrcs = DefMI->getDesc().getNumOperands() - NumDefs;
@@ -308,13 +307,13 @@ bool PeepholeOptimizer::OptimizeBitcastInstr(MachineInstr *MI,
     unsigned Reg = MO.getReg();
     if (!Reg)
       continue;
-    if (MO.isDef())
-      SrcDef = Reg;
-    else if (SrcSrc)
-      // Multiple sources?
-      return false;
-    else
-      SrcSrc = Reg;
+    if (!MO.isDef()) {
+      if (SrcSrc)
+        // Multiple sources?
+        return false;
+      else
+        SrcSrc = Reg;
+    }
   }
 
   if (MRI->getRegClass(SrcSrc) != MRI->getRegClass(Def))
@@ -434,6 +433,7 @@ bool PeepholeOptimizer::runOnMachineFunction(MachineFunction &MF) {
       if (MCID.isBitcast()) {
         if (OptimizeBitcastInstr(MI, MBB)) {
           // MI is deleted.
+          LocalMIs.erase(MI);
           Changed = true;
           MII = First ? I->begin() : llvm::next(PMII);
           continue;
@@ -441,6 +441,7 @@ bool PeepholeOptimizer::runOnMachineFunction(MachineFunction &MF) {
       } else if (MCID.isCompare()) {
         if (OptimizeCmpInstr(MI, MBB)) {
           // MI is deleted.
+          LocalMIs.erase(MI);
           Changed = true;
           MII = First ? I->begin() : llvm::next(PMII);
           continue;
-- 
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