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Add support for fptosi of constants in fast isel. 

llvm-svn: 55393
This commit is contained in:
Owen Anderson 2008-08-26 22:34:28 +00:00
parent af665820e4
commit 655c1dc63d
1 changed files with 29 additions and 3 deletions
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32
llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -355,9 +355,35 @@ FastISel::SelectInstructions(BasicBlock::iterator Begin,
ValueMap[I] = ResultReg;
break;
} else
// TODO: Materialize constant and convert to FP.
return I;
} else {
// Materialize constant and convert to FP.
// TODO: Attempt constant folding?
ConstantInt* CI = cast<ConstantInt>(I->getOperand(0));
MVT SrcVT = MVT::getMVT(CI->getType());
MVT DstVT = MVT::getMVT(I->getType());
if (SrcVT == MVT::Other || !SrcVT.isSimple() ||
DstVT == MVT::Other || !DstVT.isSimple() ||
!TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT))
// Unhandled type. Halt "fast" selection and bail.
return I;
unsigned ResultReg1 = FastEmit_i(SrcVT.getSimpleVT(),
SrcVT.getSimpleVT(),
ISD::Constant, CI->getZExtValue());
if (!ResultReg1)
return I;
unsigned ResultReg2 = FastEmit_r(SrcVT.getSimpleVT(),
DstVT.getSimpleVT(),
ISD::SINT_TO_FP,
ResultReg1);
if (!ResultReg2)
return I;
ValueMap[I] = ResultReg2;
break;
}
default:
// Unhandled instruction. Halt "fast" selection and bail.