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Avoid folding a load instruction into an instruction that redefines the register.
The target hook doesn't know how to do that. (Neither do I). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125108 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -157,7 +157,8 @@ bool InlineSpiller::reMaterializeFor(MachineBasicBlock::iterator MI) {
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// Finally we can rematerialize OrigMI before MI.
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SlotIndex DefIdx = edit_->rematerializeAt(*MI->getParent(), MI, NewLI.reg, RM,
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lis_, tii_, tri_);
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DEBUG(dbgs() << "\tremat: " << DefIdx << '\n');
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DEBUG(dbgs() << "\tremat: " << DefIdx << '\t'
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<< *lis_.getInstructionFromIndex(DefIdx));
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// Replace operands
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for (unsigned i = 0, e = Ops.size(); i != e; ++i) {
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@ -270,6 +271,9 @@ bool InlineSpiller::foldMemoryOperand(MachineBasicBlock::iterator MI,
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// FIXME: Teach targets to deal with subregs.
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if (MO.getSubReg())
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return false;
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// We cannot fold a load instruction into a def.
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if (LoadMI && MO.isDef())
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return false;
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// Tied use operands should not be passed to foldMemoryOperand.
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if (!MI->isRegTiedToDefOperand(Idx))
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FoldOps.push_back(Idx);
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