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Code refactoring. 

llvm-svn: 92694
This commit is contained in:
Evan Cheng 2010-01-05 06:52:31 +00:00
parent 98d48a0b76
commit 4facc6116a
1 changed files with 19 additions and 9 deletions
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28
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -5681,13 +5681,8 @@ SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
}
SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) {
assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
SDValue Op0 = Op.getOperand(0);
SDValue Op1 = Op.getOperand(1);
DebugLoc dl = Op.getDebugLoc();
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
static SDValue LowerToBT(SDValue Op0, SDValue Op1, ISD::CondCode CC,
DebugLoc dl, SelectionDAG &DAG) {
// Lower (X & (1 << N)) == 0 to BT(X, N).
// Lower ((X >>u N) & 1) != 0 to BT(X, N).
// Lower ((X >>s N) & 1) != 0 to BT(X, N).
@ -5699,14 +5694,14 @@ SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) {
SDValue LHS, RHS;
if (Op0.getOperand(1).getOpcode() == ISD::SHL) {
if (ConstantSDNode *Op010C =
dyn_cast<ConstantSDNode>(Op0.getOperand(1).getOperand(0)))
dyn_cast<ConstantSDNode>(Op0.getOperand(1).getOperand(0)))
if (Op010C->getZExtValue() == 1) {
LHS = Op0.getOperand(0);
RHS = Op0.getOperand(1).getOperand(1);
}
} else if (Op0.getOperand(0).getOpcode() == ISD::SHL) {
if (ConstantSDNode *Op000C =
dyn_cast<ConstantSDNode>(Op0.getOperand(0).getOperand(0)))
dyn_cast<ConstantSDNode>(Op0.getOperand(0).getOperand(0)))
if (Op000C->getZExtValue() == 1) {
LHS = Op0.getOperand(1);
RHS = Op0.getOperand(0).getOperand(1);
@ -5740,6 +5735,21 @@ SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) {
}
}
return SDValue();
}
SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) {
assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
SDValue Op0 = Op.getOperand(0);
SDValue Op1 = Op.getOperand(1);
DebugLoc dl = Op.getDebugLoc();
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
// Optimize to BT if possible.
SDValue NewCond = LowerToBT(Op0, Op1, CC, dl, DAG);
if (NewCond.getNode())
return NewCond;
bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
if (X86CC == X86::COND_INVALID)