summaryrefslogtreecommitdiffstats
path: root/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp')
-rw-r--r--llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
index a60a43a2ddc..955524c2a67 100644
--- a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
+++ b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
@@ -166,7 +166,8 @@ void AggressiveAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
for (const MCPhysReg *I = MF.getRegInfo().getCalleeSavedRegs(); *I;
++I) {
unsigned Reg = *I;
- if (!IsReturnBlock && !Pristine.test(Reg)) continue;
+ if (!IsReturnBlock && !(Pristine.test(Reg) || BB->isLiveIn(Reg)))
+ continue;
for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) {
unsigned AliasReg = *AI;
State->UnionGroups(AliasReg, 0);
OpenPOWER on IntegriCloud