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-rw-r--r--lib/CodeGen/LiveIntervalAnalysis.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index aa2f965..b77d43f 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -1136,11 +1136,14 @@ rewriteInstructionForSpills(const LiveInterval &li, const VNInfo *VNI,
rewriteImplicitOps(li, MI, NewVReg, vrm);
// Reuse NewVReg for other reads.
+ bool HasEarlyClobber = false;
for (unsigned j = 0, e = Ops.size(); j != e; ++j) {
MachineOperand &mopj = MI->getOperand(Ops[j]);
mopj.setReg(NewVReg);
if (mopj.isImplicit())
rewriteImplicitOps(li, MI, NewVReg, vrm);
+ if (mopj.isEarlyClobber())
+ HasEarlyClobber = true;
}
if (CreatedNewVReg) {
@@ -1199,7 +1202,8 @@ rewriteInstructionForSpills(const LiveInterval &li, const VNInfo *VNI,
}
}
if (HasDef) {
- LiveRange LR(index.getDefIndex(), index.getStoreIndex(),
+ LiveRange LR(HasEarlyClobber ? index.getUseIndex() : index.getDefIndex(),
+ index.getStoreIndex(),
nI.getNextValue(SlotIndex(), 0, VNInfoAllocator));
DEBUG(dbgs() << " +" << LR);
nI.addRange(LR);