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LiveRangeCalc: Improve error messages on malformed IR
llvm-svn: 237008
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@ -272,13 +272,19 @@ bool LiveRangeCalc::findReachingDefs(LiveRange &LR, MachineBasicBlock &UseMBB,
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#ifndef NDEBUG
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if (MBB->pred_empty()) {
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MBB->getParent()->verify();
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errs() << "Use of " << PrintReg(PhysReg)
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<< " does not have a corresponding definition on every path:\n";
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const MachineInstr *MI = Indexes->getInstructionFromIndex(Use);
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if (MI != nullptr)
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errs() << Use << " " << *MI;
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llvm_unreachable("Use not jointly dominated by defs.");
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}
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if (TargetRegisterInfo::isPhysicalRegister(PhysReg) &&
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!MBB->isLiveIn(PhysReg)) {
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MBB->getParent()->verify();
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errs() << "The register needs to be live in to BB#" << MBB->getNumber()
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errs() << "The register " << PrintReg(PhysReg)
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<< " needs to be live in to BB#" << MBB->getNumber()
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<< ", but is missing from the live-in list.\n";
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llvm_unreachable("Invalid global physical register");
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}
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