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Generate DBG_VALUE from dbg.value intrinsics. These currently 

comes out as comments but will eventually generate DWARF.

llvm-svn: 96601
This commit is contained in:
Dale Johannesen 2010-02-18 18:51:15 +00:00
parent 7dff4163aa
commit 654528e8a7
1 changed files with 31 additions and 0 deletions
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31
llvm/lib/Target/X86/X86FastISel.cpp
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@ -1161,10 +1161,41 @@ bool X86FastISel::X86VisitIntrinsicCall(IntrinsicInst &I) {
if (!X86SelectAddress(DI->getAddress(), AM))
return false;
const TargetInstrDesc &II = TII.get(TargetOpcode::DBG_VALUE);
// FIXME may need to add RegState::Debug to any registers produced,
// although ESP/EBP should be the only ones at the moment.
addFullAddress(BuildMI(MBB, DL, II), AM).addImm(0).
addMetadata(DI->getVariable());
return true;
}
case Intrinsic::dbg_value: {
// FIXME this should eventually be moved to FastISel, when all targets
// are able to cope with DBG_VALUE. There is nothing target dependent here.
DbgValueInst *DI = cast<DbgValueInst>(&I);
const TargetInstrDesc &II = TII.get(TargetOpcode::DBG_VALUE);
Value *V = DI->getValue();
if (!V) {
// Currently the optimizer can produce this; insert an undef to
// help debugging. Probably the optimizer should not do this.
BuildMI(MBB, DL, II).addReg(0U).addImm(DI->getOffset()).
addMetadata(DI->getVariable());
} else if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
BuildMI(MBB, DL, II).addImm(CI->getZExtValue()).addImm(DI->getOffset()).
addMetadata(DI->getVariable());
} else if (ConstantFP *CF = dyn_cast<ConstantFP>(V)) {
BuildMI(MBB, DL, II).addFPImm(CF).addImm(DI->getOffset()).
addMetadata(DI->getVariable());
} else if (unsigned Reg = lookUpRegForValue(V)) {
BuildMI(MBB, DL, II).addReg(Reg, RegState::Debug).addImm(DI->getOffset()).
addMetadata(DI->getVariable());
} else {
// We can't yet handle anything else here because it would require
// generating code, thus altering codegen because of debug info.
// Insert an undef so we can see what we dropped.
BuildMI(MBB, DL, II).addReg(0U).addImm(DI->getOffset()).
addMetadata(DI->getVariable());
}
return true;
}
case Intrinsic::trap: {
BuildMI(MBB, DL, TII.get(X86::TRAP));
return true;