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Refactor to make helper method static.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168557 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2012-11-25 08:08:58 +00:00
parent 14a708b98e
commit 327e4cba09
2 changed files with 14 additions and 29 deletions
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41
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -4166,33 +4166,24 @@ static SDValue expandExp2(DebugLoc dl, SDValue Op, SelectionDAG &DAG,
/// visitPow - Lower a pow intrinsic. Handles the special sequences for
/// limited-precision mode with x == 10.0f.
void
SelectionDAGBuilder::visitPow(const CallInst &I) {
SDValue result;
const Value *Val = I.getArgOperand(0);
DebugLoc dl = getCurDebugLoc();
static SDValue expandPow(DebugLoc dl, SDValue LHS, SDValue RHS,
SelectionDAG &DAG, const TargetLowering &TLI) {
bool IsExp10 = false;
if (getValue(Val).getValueType() == MVT::f32 &&
getValue(I.getArgOperand(1)).getValueType() == MVT::f32 &&
if (LHS.getValueType() == MVT::f32 && LHS.getValueType() == MVT::f32 &&
LimitFloatPrecision > 0 && LimitFloatPrecision <= 18) {
if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(Val))) {
if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
APFloat Ten(10.0f);
IsExp10 = CFP->getValueAPF().bitwiseIsEqual(Ten);
}
if (ConstantFPSDNode *LHSC = dyn_cast<ConstantFPSDNode>(LHS)) {
APFloat Ten(10.0f);
IsExp10 = LHSC->isExactlyValue(Ten);
}
}
if (IsExp10) {
SDValue Op = getValue(I.getArgOperand(1));
// Put the exponent in the right bit position for later addition to the
// final result:
//
// #define LOG2OF10 3.3219281f
// IntegerPartOfX = (int32_t)(x * LOG2OF10);
SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, Op,
SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, RHS,
getF32Constant(DAG, 0x40549a78));
SDValue IntegerPartOfX = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, t0);
@ -4272,18 +4263,13 @@ SelectionDAGBuilder::visitPow(const CallInst &I) {
}
SDValue t13 = DAG.getNode(ISD::BITCAST, dl,MVT::i32,TwoToFractionalPartOfX);
result = DAG.getNode(ISD::BITCAST, dl, MVT::f32,
DAG.getNode(ISD::ADD, dl, MVT::i32,
t13, IntegerPartOfX));
} else {
// No special expansion.
result = DAG.getNode(ISD::FPOW, dl,
getValue(I.getArgOperand(0)).getValueType(),
getValue(I.getArgOperand(0)),
getValue(I.getArgOperand(1)));
return DAG.getNode(ISD::BITCAST, dl, MVT::f32,
DAG.getNode(ISD::ADD, dl, MVT::i32,
t13, IntegerPartOfX));
}
setValue(&I, result);
// No special expansion.
return DAG.getNode(ISD::FPOW, dl, LHS.getValueType(), LHS, RHS);
}
@ -4870,7 +4856,8 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
setValue(&I, expandExp2(dl, getValue(I.getArgOperand(0)), DAG, TLI));
return 0;
case Intrinsic::pow:
visitPow(I);
setValue(&I, expandPow(dl, getValue(I.getArgOperand(0)),
getValue(I.getArgOperand(1)), DAG, TLI));
return 0;
case Intrinsic::sqrt:
case Intrinsic::fabs:

2
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
View File

@ -533,8 +533,6 @@ private:
const char *visitIntrinsicCall(const CallInst &I, unsigned Intrinsic);
void visitTargetIntrinsic(const CallInst &I, unsigned Intrinsic);
void visitPow(const CallInst &I);
void visitVAStart(const CallInst &I);
void visitVAArg(const VAArgInst &I);
void visitVAEnd(const CallInst &I);