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Bugfix in InlineSpiller::traceSiblingValue().
Properly determine whether or not a phi was added by splitting. Check against the current VNInfo of OrigLI instead of against the OrigVNI argument. Patch provided by Jonas Paulsson. Reviewed by Quentin Colombet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224009 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -508,6 +508,7 @@ MachineInstr *InlineSpiller::traceSiblingValue(unsigned UseReg, VNInfo *UseVNI,
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SmallVector<std::pair<unsigned, VNInfo*>, 8> WorkList;
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WorkList.push_back(std::make_pair(UseReg, UseVNI));
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LiveInterval &OrigLI = LIS.getInterval(Original);
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do {
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unsigned Reg;
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VNInfo *VNI;
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@ -521,8 +522,11 @@ MachineInstr *InlineSpiller::traceSiblingValue(unsigned UseReg, VNInfo *UseVNI,
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// Trace through PHI-defs created by live range splitting.
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if (VNI->isPHIDef()) {
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// Stop at original PHIs. We don't know the value at the predecessors.
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if (VNI->def == OrigVNI->def) {
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// Stop at original PHIs. We don't know the value at the
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// predecessors. Look up the VNInfo for the current definition
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// in OrigLI, to properly determine whether or not this phi was
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// added by splitting.
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if (VNI->def == OrigLI.getVNInfoAt(VNI->def)->def) {
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DEBUG(dbgs() << "orig phi value\n");
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SVI->second.DefByOrigPHI = true;
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SVI->second.AllDefsAreReloads = false;
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@ -542,7 +546,6 @@ MachineInstr *InlineSpiller::traceSiblingValue(unsigned UseReg, VNInfo *UseVNI,
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// Separate all values dominated by OrigVNI into PHIs and non-PHIs.
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SmallVector<VNInfo*, 8> PHIs, NonPHIs;
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LiveInterval &LI = LIS.getInterval(Reg);
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LiveInterval &OrigLI = LIS.getInterval(Original);
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for (LiveInterval::vni_iterator VI = LI.vni_begin(), VE = LI.vni_end();
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VI != VE; ++VI) {
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