diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/FastISel.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 35ef5b7..1d76c7c 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -350,6 +350,34 @@ bool FastISel::SelectCall(User *I) { (void)TargetSelectInstruction(cast<Instruction>(I)); return true; } + case Intrinsic::dbg_value: { + // This requires target support, but right now X86 is the only Fast target. + 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::eh_exception: { EVT VT = TLI.getValueType(I->getType()); switch (TLI.getOperationAction(ISD::EXCEPTIONADDR, VT)) { |