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Style fixes: remove unnecessary braces for one-statement if blocks, no else after return, etc. No funcionality change.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185893 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Stephen Lin 2013-07-09 00:44:49 +00:00
parent 7bb386a299
commit b494015330
1 changed files with 30 additions and 54 deletions
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84
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -1254,7 +1254,7 @@ static SDValue getInputChainForNode(SDNode *N) {
if (unsigned NumOps = N->getNumOperands()) {
if (N->getOperand(0).getValueType() == MVT::Other)
return N->getOperand(0);
else if (N->getOperand(NumOps-1).getValueType() == MVT::Other)
if (N->getOperand(NumOps-1).getValueType() == MVT::Other)
return N->getOperand(NumOps-1);
for (unsigned i = 1; i < NumOps-1; ++i)
if (N->getOperand(i).getValueType() == MVT::Other)
@ -1614,9 +1614,8 @@ SDValue DAGCombiner::visitADDE(SDNode *N) {
// check if we can before folding.
static SDValue tryFoldToZero(SDLoc DL, const TargetLowering &TLI, EVT VT,
SelectionDAG &DAG, bool LegalOperations) {
if (!VT.isVector()) {
if (!VT.isVector())
return DAG.getConstant(0, VT);
}
if (!LegalOperations || TLI.isOperationLegal(ISD::BUILD_VECTOR, VT)) {
// Produce a vector of zeros.
SDValue El = DAG.getConstant(0, VT.getVectorElementType());
@ -3343,25 +3342,21 @@ SDNode *DAGCombiner::MatchRotate(SDValue LHS, SDValue RHS, SDLoc DL) {
LHSShiftAmt == RHSShiftAmt.getOperand(1)) {
if (ConstantSDNode *SUBC =
dyn_cast<ConstantSDNode>(RHSShiftAmt.getOperand(0))) {
if (SUBC->getAPIntValue() == OpSizeInBits) {
if (SUBC->getAPIntValue() == OpSizeInBits)
return DAG.getNode(HasROTL ? ISD::ROTL : ISD::ROTR, DL, VT, LHSShiftArg,
HasROTL ? LHSShiftAmt : RHSShiftAmt).getNode();
}
}
}
// fold (or (shl x, (sub 32, y)), (srl x, r)) -> (rotr x, y)
// fold (or (shl x, (sub 32, y)), (srl x, r)) -> (rotl x, (sub 32, y))
if (LHSShiftAmt.getOpcode() == ISD::SUB &&
RHSShiftAmt == LHSShiftAmt.getOperand(1)) {
RHSShiftAmt == LHSShiftAmt.getOperand(1))
if (ConstantSDNode *SUBC =
dyn_cast<ConstantSDNode>(LHSShiftAmt.getOperand(0))) {
if (SUBC->getAPIntValue() == OpSizeInBits) {
dyn_cast<ConstantSDNode>(LHSShiftAmt.getOperand(0)))
if (SUBC->getAPIntValue() == OpSizeInBits)
return DAG.getNode(HasROTR ? ISD::ROTR : ISD::ROTL, DL, VT, LHSShiftArg,
HasROTR ? RHSShiftAmt : LHSShiftAmt).getNode();
}
}
}
// Look for sign/zext/any-extended or truncate cases:
if ((LHSShiftAmt.getOpcode() == ISD::SIGN_EXTEND ||
@ -3381,13 +3376,11 @@ SDNode *DAGCombiner::MatchRotate(SDValue LHS, SDValue RHS, SDLoc DL) {
// fold (or (shl x, (*ext y)), (srl x, (*ext (sub 32, y)))) ->
// (rotr x, (sub 32, y))
if (ConstantSDNode *SUBC =
dyn_cast<ConstantSDNode>(RExtOp0.getOperand(0))) {
if (SUBC->getAPIntValue() == OpSizeInBits) {
dyn_cast<ConstantSDNode>(RExtOp0.getOperand(0)))
if (SUBC->getAPIntValue() == OpSizeInBits)
return DAG.getNode(HasROTL ? ISD::ROTL : ISD::ROTR, DL, VT,
LHSShiftArg,
HasROTL ? LHSShiftAmt : RHSShiftAmt).getNode();
}
}
} else if (LExtOp0.getOpcode() == ISD::SUB &&
RExtOp0 == LExtOp0.getOperand(1)) {
// fold (or (shl x, (*ext (sub 32, y))), (srl x, (*ext y))) ->
@ -3395,13 +3388,11 @@ SDNode *DAGCombiner::MatchRotate(SDValue LHS, SDValue RHS, SDLoc DL) {
// fold (or (shl x, (*ext (sub 32, y))), (srl x, (*ext y))) ->
// (rotl x, (sub 32, y))
if (ConstantSDNode *SUBC =
dyn_cast<ConstantSDNode>(LExtOp0.getOperand(0))) {
if (SUBC->getAPIntValue() == OpSizeInBits) {
dyn_cast<ConstantSDNode>(LExtOp0.getOperand(0)))
if (SUBC->getAPIntValue() == OpSizeInBits)
return DAG.getNode(HasROTR ? ISD::ROTR : ISD::ROTL, DL, VT,
LHSShiftArg,
HasROTR ? RHSShiftAmt : LHSShiftAmt).getNode();
}
}
}
}
@ -5084,9 +5075,8 @@ SDValue DAGCombiner::GetDemandedBits(SDValue V, const APInt &Mask) {
assert(CV != 0 && "Const value should be ConstSDNode.");
const APInt &CVal = CV->getAPIntValue();
APInt NewVal = CVal & Mask;
if (NewVal != CVal) {
if (NewVal != CVal)
return DAG.getConstant(NewVal, V.getValueType());
}
break;
}
case ISD::OR:
@ -5303,10 +5293,9 @@ SDValue DAGCombiner::visitSIGN_EXTEND_INREG(SDNode *N) {
// fold (sext_in_reg (sext_in_reg x, VT2), VT1) -> (sext_in_reg x, minVT) pt2
if (N0.getOpcode() == ISD::SIGN_EXTEND_INREG &&
EVT.bitsLT(cast<VTSDNode>(N0.getOperand(1))->getVT())) {
EVT.bitsLT(cast<VTSDNode>(N0.getOperand(1))->getVT()))
return DAG.getNode(ISD::SIGN_EXTEND_INREG, SDLoc(N), VT,
N0.getOperand(0), N1);
}
// fold (sext_in_reg (sext x)) -> (sext x)
// fold (sext_in_reg (aext x)) -> (sext x)
@ -5951,15 +5940,13 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
// If allow, fold (fadd (fneg x), x) -> 0.0
if (AllowNewFpConst && DAG.getTarget().Options.UnsafeFPMath &&
N0.getOpcode() == ISD::FNEG && N0.getOperand(0) == N1) {
N0.getOpcode() == ISD::FNEG && N0.getOperand(0) == N1)
return DAG.getConstantFP(0.0, VT);
}
// If allow, fold (fadd x, (fneg x)) -> 0.0
if (AllowNewFpConst && DAG.getTarget().Options.UnsafeFPMath &&
N1.getOpcode() == ISD::FNEG && N1.getOperand(0) == N0) {
N1.getOpcode() == ISD::FNEG && N1.getOperand(0) == N0)
return DAG.getConstantFP(0.0, VT);
}
// In unsafe math mode, we can fold chains of FADD's of the same value
// into multiplications. This transform is not safe in general because
@ -6062,20 +6049,18 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(N0.getOperand(0));
// (fadd (fadd x, x), x) -> (fmul x, 3.0)
if (!CFP && N0.getOperand(0) == N0.getOperand(1) &&
(N0.getOperand(0) == N1)) {
(N0.getOperand(0) == N1))
return DAG.getNode(ISD::FMUL, SDLoc(N), VT,
N1, DAG.getConstantFP(3.0, VT));
}
}
if (N1.getOpcode() == ISD::FADD && AllowNewFpConst) {
ConstantFPSDNode *CFP10 = dyn_cast<ConstantFPSDNode>(N1.getOperand(0));
// (fadd x, (fadd x, x)) -> (fmul x, 3.0)
if (!CFP10 && N1.getOperand(0) == N1.getOperand(1) &&
N1.getOperand(0) == N0) {
N1.getOperand(0) == N0)
return DAG.getNode(ISD::FMUL, SDLoc(N), VT,
N0, DAG.getConstantFP(3.0, VT));
}
}
// (fadd (fadd x, x), (fadd x, x)) -> (fmul x, 4.0)
@ -6083,11 +6068,10 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
N0.getOpcode() == ISD::FADD && N1.getOpcode() == ISD::FADD &&
N0.getOperand(0) == N0.getOperand(1) &&
N1.getOperand(0) == N1.getOperand(1) &&
N0.getOperand(0) == N1.getOperand(0)) {
N0.getOperand(0) == N1.getOperand(0))
return DAG.getNode(ISD::FMUL, SDLoc(N), VT,
N0.getOperand(0),
DAG.getConstantFP(4.0, VT));
}
}
// FADD -> FMA combines:
@ -6097,17 +6081,15 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
TLI.isOperationLegalOrCustom(ISD::FMA, VT)) {
// fold (fadd (fmul x, y), z) -> (fma x, y, z)
if (N0.getOpcode() == ISD::FMUL && N0->hasOneUse()) {
if (N0.getOpcode() == ISD::FMUL && N0->hasOneUse())
return DAG.getNode(ISD::FMA, SDLoc(N), VT,
N0.getOperand(0), N0.getOperand(1), N1);
}
// fold (fadd x, (fmul y, z)) -> (fma y, z, x)
// Note: Commutes FADD operands.
if (N1.getOpcode() == ISD::FMUL && N1->hasOneUse()) {
if (N1.getOpcode() == ISD::FMUL && N1->hasOneUse())
return DAG.getNode(ISD::FMA, SDLoc(N), VT,
N1.getOperand(0), N1.getOperand(1), N0);
}
}
return SDValue();
@ -6162,8 +6144,9 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) {
if (N10 == N0 && isNegatibleForFree(N11, LegalOperations, TLI,
&DAG.getTarget().Options))
return GetNegatedExpression(N11, DAG, LegalOperations);
else if (N11 == N0 && isNegatibleForFree(N10, LegalOperations, TLI,
&DAG.getTarget().Options))
if (N11 == N0 && isNegatibleForFree(N10, LegalOperations, TLI,
&DAG.getTarget().Options))
return GetNegatedExpression(N10, DAG, LegalOperations);
}
}
@ -6175,22 +6158,20 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) {
TLI.isOperationLegalOrCustom(ISD::FMA, VT)) {
// fold (fsub (fmul x, y), z) -> (fma x, y, (fneg z))
if (N0.getOpcode() == ISD::FMUL && N0->hasOneUse()) {
if (N0.getOpcode() == ISD::FMUL && N0->hasOneUse())
return DAG.getNode(ISD::FMA, dl, VT,
N0.getOperand(0), N0.getOperand(1),
DAG.getNode(ISD::FNEG, dl, VT, N1));
}
// fold (fsub x, (fmul y, z)) -> (fma (fneg y), z, x)
// Note: Commutes FSUB operands.
if (N1.getOpcode() == ISD::FMUL && N1->hasOneUse()) {
if (N1.getOpcode() == ISD::FMUL && N1->hasOneUse())
return DAG.getNode(ISD::FMA, dl, VT,
DAG.getNode(ISD::FNEG, dl, VT,
N1.getOperand(0)),
N1.getOperand(1), N0);
}
// fold (fsub (-(fmul, x, y)), z) -> (fma (fneg x), y, (fneg z))
// fold (fsub (fneg (fmul, x, y)), z) -> (fma (fneg x), y, (fneg z))
if (N0.getOpcode() == ISD::FNEG &&
N0.getOperand(0).getOpcode() == ISD::FMUL &&
N0->hasOneUse() && N0.getOperand(0).hasOneUse()) {
@ -6328,21 +6309,17 @@ SDValue DAGCombiner::visitFMA(SDNode *N) {
}
// (fma x, c, x) -> (fmul x, (c+1))
if (DAG.getTarget().Options.UnsafeFPMath && N1CFP && N0 == N2) {
return DAG.getNode(ISD::FMUL, dl, VT,
N0,
if (DAG.getTarget().Options.UnsafeFPMath && N1CFP && N0 == N2)
return DAG.getNode(ISD::FMUL, dl, VT, N0,
DAG.getNode(ISD::FADD, dl, VT,
N1, DAG.getConstantFP(1.0, VT)));
}
// (fma x, c, (fneg x)) -> (fmul x, (c-1))
if (DAG.getTarget().Options.UnsafeFPMath && N1CFP &&
N2.getOpcode() == ISD::FNEG && N2.getOperand(0) == N0) {
return DAG.getNode(ISD::FMUL, dl, VT,
N0,
N2.getOpcode() == ISD::FNEG && N2.getOperand(0) == N0)
return DAG.getNode(ISD::FMUL, dl, VT, N0,
DAG.getNode(ISD::FADD, dl, VT,
N1, DAG.getConstantFP(-1.0, VT)));
}
return SDValue();
@ -6722,12 +6699,11 @@ SDValue DAGCombiner::visitFNEG(SDNode *N) {
// (fneg (fmul c, x)) -> (fmul -c, x)
if (N0.getOpcode() == ISD::FMUL) {
ConstantFPSDNode *CFP1 = dyn_cast<ConstantFPSDNode>(N0.getOperand(1));
if (CFP1) {
if (CFP1)
return DAG.getNode(ISD::FMUL, SDLoc(N), VT,
N0.getOperand(0),
DAG.getNode(ISD::FNEG, SDLoc(N), VT,
N0.getOperand(1)));
}
}
return SDValue();