Remove preexisting kill flags in RegAllocLocal, just like LiveVariables does.

This should make it possible to start producing kill flags in isel without
breaking stuff.

llvm-svn: 102976

1 files changed, 4 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/RegAllocLocal.cpp b/llvm/lib/CodeGen/RegAllocLocal.cpp
index 920ba5732ad..94456d14385 100644
--- a/llvm/lib/CodeGen/RegAllocLocal.cpp
+++ b/llvm/lib/CodeGen/RegAllocLocal.cpp
@@ -643,7 +643,10 @@ void RALocal::ComputeLocalLiveness(MachineBasicBlock& MBB) {
       // uses regs before it defs them.
       if (!MO.isReg() || !MO.getReg() || !MO.isUse())
         continue;
-      
+
+      // Ignore helpful kill flags from earlier passes.
+      MO.setIsKill(false);
+
       LastUseDef[MO.getReg()] = std::make_pair(I, i);
       
       if (TargetRegisterInfo::isVirtualRegister(MO.getReg())) continue;