One more. Transfer kill of the larger register when lowering an EXTRACT_SUBREG.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78145 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LowerSubregs.cpp b/lib/CodeGen/LowerSubregs.cpp
index 358aa16..2a12063 100644
--- a/lib/CodeGen/LowerSubregs.cpp
+++ b/lib/CodeGen/LowerSubregs.cpp
@@ -56,7 +56,8 @@
void TransferDeadFlag(MachineInstr *MI, unsigned DstReg,
const TargetRegisterInfo &TRI);
void TransferKillFlag(MachineInstr *MI, unsigned SrcReg,
- const TargetRegisterInfo &TRI);
+ const TargetRegisterInfo &TRI,
+ bool AddIfNotFound = false);
};
char LowerSubregsInstructionPass::ID = 0;
@@ -88,10 +89,11 @@
void
LowerSubregsInstructionPass::TransferKillFlag(MachineInstr *MI,
unsigned SrcReg,
- const TargetRegisterInfo &TRI) {
+ const TargetRegisterInfo &TRI,
+ bool AddIfNotFound) {
for (MachineBasicBlock::iterator MII =
prior(MachineBasicBlock::iterator(MI)); ; --MII) {
- if (MII->addRegisterKilled(SrcReg, &TRI))
+ if (MII->addRegisterKilled(SrcReg, &TRI, AddIfNotFound))
break;
assert(MII != MI->getParent()->begin() &&
"copyRegToReg output doesn't reference source register!");
@@ -142,7 +144,7 @@
if (MI->getOperand(0).isDead())
TransferDeadFlag(MI, DstReg, TRI);
if (MI->getOperand(1).isKill())
- TransferKillFlag(MI, SrcReg, TRI);
+ TransferKillFlag(MI, SuperReg, TRI, true);
#ifndef NDEBUG
MachineBasicBlock::iterator dMI = MI;