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LiveRangeCalc: Improve error messages on malformed IR 

llvm-svn: 237008
This commit is contained in:
Matthias Braun 2015-05-11 18:47:47 +00:00
parent e958275250
commit 5391754288
1 changed files with 7 additions and 1 deletions
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8
llvm/lib/CodeGen/LiveRangeCalc.cpp
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@ -272,13 +272,19 @@ bool LiveRangeCalc::findReachingDefs(LiveRange &LR, MachineBasicBlock &UseMBB,
#ifndef NDEBUG
if (MBB->pred_empty()) {
MBB->getParent()->verify();
errs() << "Use of " << PrintReg(PhysReg)
<< " does not have a corresponding definition on every path:\n";
const MachineInstr *MI = Indexes->getInstructionFromIndex(Use);
if (MI != nullptr)
errs() << Use << " " << *MI;
llvm_unreachable("Use not jointly dominated by defs.");
}
if (TargetRegisterInfo::isPhysicalRegister(PhysReg) &&
!MBB->isLiveIn(PhysReg)) {
MBB->getParent()->verify();
errs() << "The register needs to be live in to BB#" << MBB->getNumber()
errs() << "The register " << PrintReg(PhysReg)
<< " needs to be live in to BB#" << MBB->getNumber()
<< ", but is missing from the live-in list.\n";
llvm_unreachable("Invalid global physical register");
}