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Forgot this part with my last patch. Sorry about the breakage. 

llvm-svn: 56552
This commit is contained in:
Bill Wendling 2008-09-24 10:16:24 +00:00
parent 4e26a81371
commit 162c26dee3
1 changed files with 38 additions and 27 deletions
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65
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2271,6 +2271,42 @@ SDValue SelectionDAG::getNode(unsigned Opcode, MVT VT, SDValue Operand) {
return SDValue(N, 0);
}
SDValue SelectionDAG::FoldConstantArithmetic(unsigned Opcode,
MVT VT,
ConstantSDNode *Cst1,
ConstantSDNode *Cst2) {
const APInt &C1 = Cst1->getAPIntValue(), &C2 = Cst2->getAPIntValue();
switch (Opcode) {
case ISD::ADD: return getConstant(C1 + C2, VT);
case ISD::SUB: return getConstant(C1 - C2, VT);
case ISD::MUL: return getConstant(C1 * C2, VT);
case ISD::UDIV:
if (C2.getBoolValue()) return getConstant(C1.udiv(C2), VT);
break;
case ISD::UREM:
if (C2.getBoolValue()) return getConstant(C1.urem(C2), VT);
break;
case ISD::SDIV:
if (C2.getBoolValue()) return getConstant(C1.sdiv(C2), VT);
break;
case ISD::SREM:
if (C2.getBoolValue()) return getConstant(C1.srem(C2), VT);
break;
case ISD::AND: return getConstant(C1 & C2, VT);
case ISD::OR: return getConstant(C1 | C2, VT);
case ISD::XOR: return getConstant(C1 ^ C2, VT);
case ISD::SHL: return getConstant(C1 << C2, VT);
case ISD::SRL: return getConstant(C1.lshr(C2), VT);
case ISD::SRA: return getConstant(C1.ashr(C2), VT);
case ISD::ROTL: return getConstant(C1.rotl(C2), VT);
case ISD::ROTR: return getConstant(C1.rotr(C2), VT);
default: break;
}
return SDValue();
}
SDValue SelectionDAG::getNode(unsigned Opcode, MVT VT,
SDValue N1, SDValue N2) {
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.getNode());
@ -2457,33 +2493,8 @@ SDValue SelectionDAG::getNode(unsigned Opcode, MVT VT,
if (N1C) {
if (N2C) {
const APInt &C1 = N1C->getAPIntValue(), &C2 = N2C->getAPIntValue();
switch (Opcode) {
case ISD::ADD: return getConstant(C1 + C2, VT);
case ISD::SUB: return getConstant(C1 - C2, VT);
case ISD::MUL: return getConstant(C1 * C2, VT);
case ISD::UDIV:
if (C2.getBoolValue()) return getConstant(C1.udiv(C2), VT);
break;
case ISD::UREM :
if (C2.getBoolValue()) return getConstant(C1.urem(C2), VT);
break;
case ISD::SDIV :
if (C2.getBoolValue()) return getConstant(C1.sdiv(C2), VT);
break;
case ISD::SREM :
if (C2.getBoolValue()) return getConstant(C1.srem(C2), VT);
break;
case ISD::AND : return getConstant(C1 & C2, VT);
case ISD::OR : return getConstant(C1 | C2, VT);
case ISD::XOR : return getConstant(C1 ^ C2, VT);
case ISD::SHL : return getConstant(C1 << C2, VT);
case ISD::SRL : return getConstant(C1.lshr(C2), VT);
case ISD::SRA : return getConstant(C1.ashr(C2), VT);
case ISD::ROTL : return getConstant(C1.rotl(C2), VT);
case ISD::ROTR : return getConstant(C1.rotr(C2), VT);
default: break;
}
SDValue SV = FoldConstantArithmetic(Opcode, VT, N1C, N2C);
if (SV.getNode()) return SV;
} else { // Cannonicalize constant to RHS if commutative
if (isCommutativeBinOp(Opcode)) {
std::swap(N1C, N2C);