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Between scheduling regions, correctly maintain anti-dep breaking state so that we don't incorrectly rename registers that span these regions.

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llvm-svn: 85537
This commit is contained in:
David Goodwin 2009-10-29 23:30:59 +00:00
parent ed15829b83
commit 9a91b1fe3d
1 changed files with 7 additions and 5 deletions
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12
lib/CodeGen/AggressiveAntiDepBreaker.cpp
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@ -195,8 +195,14 @@ void AggressiveAntiDepBreaker::Observe(MachineInstr *MI, unsigned Count,
unsigned InsertPosIndex) {
assert(Count < InsertPosIndex && "Instruction index out of expected range!");
std::set<unsigned> PassthruRegs;
GetPassthruRegs(MI, PassthruRegs);
PrescanInstruction(MI, Count, PassthruRegs);
ScanInstruction(MI, Count);
DEBUG(errs() << "Observe: ");
DEBUG(MI->dump());
DEBUG(errs() << "\tRegs:");
unsigned *DefIndices = State->GetDefIndices();
for (unsigned Reg = 0; Reg != TargetRegisterInfo::FirstVirtualRegister; ++Reg) {
@ -215,11 +221,7 @@ void AggressiveAntiDepBreaker::Observe(MachineInstr *MI, unsigned Count,
DefIndices[Reg] = Count;
}
}
std::set<unsigned> PassthruRegs;
GetPassthruRegs(MI, PassthruRegs);
PrescanInstruction(MI, Count, PassthruRegs);
ScanInstruction(MI, Count);
DEBUG(errs() << '\n');
// We're starting a new schedule region so forget any saved state.
delete SavedState;