[llvm-commits] [llvm] r156778 - /llvm/trunk/lib/CodeGen/RegAllocFast.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Mon May 14 16:30:58 2012
New Revision: 156778

URL: http://llvm.org/viewvc/llvm-project?rev=156778&view=rev
Log:
Don't access MO reference after invalidating operand list.

This should unbreak llvm-x86_64-linux.

Modified:
    llvm/trunk/lib/CodeGen/RegAllocFast.cpp

Modified: llvm/trunk/lib/CodeGen/RegAllocFast.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/RegAllocFast.cpp?rev=156778&r1=156777&r2=156778&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/RegAllocFast.cpp (original)
+++ llvm/trunk/lib/CodeGen/RegAllocFast.cpp Mon May 14 16:30:58 2012
@@ -659,9 +659,10 @@
 // Return true if the operand kills its register.
 bool RAFast::setPhysReg(MachineInstr *MI, unsigned OpNum, unsigned PhysReg) {
   MachineOperand &MO = MI->getOperand(OpNum);
+  bool Dead = MO.isDead();
   if (!MO.getSubReg()) {
     MO.setReg(PhysReg);
-    return MO.isKill() || MO.isDead();
+    return MO.isKill() || Dead;
   }
 
   // Handle subregister index.
@@ -680,7 +681,7 @@
   if (MO.isDef() && MO.isUndef())
     MI->addRegisterDefined(PhysReg, TRI);
 
-  return MO.isDead();
+  return Dead;
 }
 
 // Handle special instruction operand like early clobbers and tied ops when