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sink the call to VT.getSizeInBits() down into its uses, 

not all unary nodes necessarily have a simple result type.

llvm-svn: 98547
This commit is contained in:
Chris Lattner 2010-03-15 16:05:15 +00:00
parent ea16606fcd
commit d5df1f5b54
1 changed files with 5 additions and 7 deletions
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12
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2329,22 +2329,20 @@ SDValue SelectionDAG::getNode(unsigned Opcode, DebugLoc DL,
// Constant fold unary operations with an integer constant operand.
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Operand.getNode())) {
const APInt &Val = C->getAPIntValue();
unsigned BitWidth = VT.getSizeInBits();
switch (Opcode) {
default: break;
case ISD::SIGN_EXTEND:
return getConstant(APInt(Val).sextOrTrunc(BitWidth), VT);
return getConstant(APInt(Val).sext(VT.getSizeInBits()), VT);
case ISD::ANY_EXTEND:
case ISD::ZERO_EXTEND:
case ISD::TRUNCATE:
return getConstant(APInt(Val).zextOrTrunc(BitWidth), VT);
return getConstant(APInt(Val).zextOrTrunc(VT.getSizeInBits()), VT);
case ISD::UINT_TO_FP:
case ISD::SINT_TO_FP: {
const uint64_t zero[] = {0, 0};
// No compile time operations on this type.
if (VT==MVT::ppcf128)
break;
APFloat apf = APFloat(APInt(BitWidth, 2, zero));
// No compile time operations on ppcf128.
if (VT == MVT::ppcf128) break;
APFloat apf = APFloat(APInt(VT.getSizeInBits(), 2, zero));
(void)apf.convertFromAPInt(Val,
Opcode==ISD::SINT_TO_FP,
APFloat::rmNearestTiesToEven);