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Fix PR8612 in the standard spiller as well. 

The live range of a register defined by an early clobber starts at the use slot,
not the def slot.

llvm-svn: 119183
This commit is contained in:
Jakob Stoklund Olesen 2010-11-15 20:55:53 +00:00
parent ddf25c341c
commit 97825bcbfd
2 changed files with 6 additions and 1 deletions
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6
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -1136,11 +1136,14 @@ rewriteInstructionForSpills(const LiveInterval &li, const VNInfo *VNI,
rewriteImplicitOps(li, MI, NewVReg, vrm); rewriteImplicitOps(li, MI, NewVReg, vrm);
// Reuse NewVReg for other reads. // Reuse NewVReg for other reads.
bool HasEarlyClobber = false;
for (unsigned j = 0, e = Ops.size(); j != e; ++j) { for (unsigned j = 0, e = Ops.size(); j != e; ++j) {
MachineOperand &mopj = MI->getOperand(Ops[j]); MachineOperand &mopj = MI->getOperand(Ops[j]);
mopj.setReg(NewVReg); mopj.setReg(NewVReg);
if (mopj.isImplicit()) if (mopj.isImplicit())
rewriteImplicitOps(li, MI, NewVReg, vrm); rewriteImplicitOps(li, MI, NewVReg, vrm);
if (mopj.isEarlyClobber())
HasEarlyClobber = true;
} }
if (CreatedNewVReg) { if (CreatedNewVReg) {
@ -1199,7 +1202,8 @@ rewriteInstructionForSpills(const LiveInterval &li, const VNInfo *VNI,
} }
} }
if (HasDef) { if (HasDef) {
LiveRange LR(index.getDefIndex(), index.getStoreIndex(), LiveRange LR(HasEarlyClobber ? index.getUseIndex() : index.getDefIndex(),
index.getStoreIndex(),
nI.getNextValue(SlotIndex(), 0, VNInfoAllocator)); nI.getNextValue(SlotIndex(), 0, VNInfoAllocator));
DEBUG(dbgs() << " +" << LR); DEBUG(dbgs() << " +" << LR);
nI.addRange(LR); nI.addRange(LR);

1
llvm/test/CodeGen/ARM/2010-11-15-SpillEarlyClobber.ll
View File

@ -1,3 +1,4 @@
; RUN: llc < %s -verify-machineinstrs -spiller=standard
; RUN: llc < %s -verify-machineinstrs -spiller=inline ; RUN: llc < %s -verify-machineinstrs -spiller=inline
; PR8612 ; PR8612
; ;