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Fix PR5024. LiveVariables physical register defs should *commit* only after all

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of the defs are processed.
Also fix a implicit_def propagation bug: a implicit_def of a physical register
should be applied to uses of the sub-registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82616 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-09-23 06:28:31 +00:00
parent f7cd853071
commit 296925dc16
4 changed files with 125 additions and 33 deletions
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4
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -141,6 +141,10 @@ void LiveIntervals::processImplicitDefs() {
if (MI->getOpcode() == TargetInstrInfo::IMPLICIT_DEF) {
unsigned Reg = MI->getOperand(0).getReg();
ImpDefRegs.insert(Reg);
if (TargetRegisterInfo::isPhysicalRegister(Reg)) {
for (const unsigned *SS = tri_->getSubRegisters(Reg); *SS; ++SS)
ImpDefRegs.insert(*SS);
}
ImpDefMIs.push_back(MI);
continue;
}