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Exit with nice warnings when register allocator run out of registers.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63267 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-01-29 02:20:59 +00:00
parent e5af2d3a22
commit 5a3c6a87b0
5 changed files with 124 additions and 41 deletions
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14
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -2228,7 +2228,19 @@ void LiveIntervals::spillPhysRegAroundRegDefsUses(const LiveInterval &li,
unsigned Index = getInstructionIndex(MI);
if (pli.liveAt(Index)) {
vrm.addEmergencySpill(SpillReg, MI);
pli.removeRange(getLoadIndex(Index), getStoreIndex(Index)+1);
unsigned StartIdx = getLoadIndex(Index);
unsigned EndIdx = getStoreIndex(Index)+1;
if (pli.isInOneLiveRange(StartIdx, EndIdx))
pli.removeRange(StartIdx, EndIdx);
else {
cerr << "Ran out of registers during register allocation!\n";
if (MI->getOpcode() == TargetInstrInfo::INLINEASM) {
cerr << "Please check your inline asm statement for invalid "
<< "constraints:\n";
MI->print(cerr.stream(), tm_);
}
exit(1);
}
for (const unsigned* AS = tri_->getSubRegisters(SpillReg); *AS; ++AS) {
if (!hasInterval(*AS))
continue;