diff options
Diffstat (limited to 'lib/Target/X86/X86ISelPattern.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelPattern.cpp | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp index 61b7e597e1..6613ba6057 100644 --- a/lib/Target/X86/X86ISelPattern.cpp +++ b/lib/Target/X86/X86ISelPattern.cpp @@ -160,6 +160,26 @@ X86TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) { if (F.isVarArg()) VarArgsFrameIndex = MFI->CreateFixedObject(1, ArgOffset); ReturnAddrIndex = 0; // No return address slot generated yet. + + // Finally, inform the code generator which regs we return values in. + switch (getValueType(F.getReturnType())) { + default: assert(0 && "Unknown type!"); + case MVT::isVoid: break; + case MVT::i1: + case MVT::i8: + case MVT::i16: + case MVT::i32: + MF.addLiveOut(X86::EAX); + break; + case MVT::i64: + MF.addLiveOut(X86::EAX); + MF.addLiveOut(X86::EDX); + break; + case MVT::f32: + case MVT::f64: + MF.addLiveOut(X86::ST0); + break; + } return ArgValues; } @@ -2929,9 +2949,6 @@ void ISel::Select(SDOperand N) { BuildMI(BB, X86::MOV32rr, 1, X86::EAX).addReg(Tmp1); BuildMI(BB, X86::MOV32rr, 1, X86::EDX).addReg(Tmp2); - // Declare that EAX & EDX are live on exit. - BuildMI(BB, X86::IMPLICIT_USE, 3).addReg(X86::EAX).addReg(X86::EDX) - .addReg(X86::ESP); break; case 2: if (getRegPressure(N.getOperand(0)) > getRegPressure(N.getOperand(1))) { @@ -2945,12 +2962,9 @@ void ISel::Select(SDOperand N) { default: assert(0 && "All other types should have been promoted!!"); case MVT::f64: BuildMI(BB, X86::FpSETRESULT, 1).addReg(Tmp1); - // Declare that top-of-stack is live on exit - BuildMI(BB, X86::IMPLICIT_USE, 2).addReg(X86::ST0).addReg(X86::ESP); break; case MVT::i32: BuildMI(BB, X86::MOV32rr, 1, X86::EAX).addReg(Tmp1); - BuildMI(BB, X86::IMPLICIT_USE, 2).addReg(X86::EAX).addReg(X86::ESP); break; } break; |