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Use SDValue bool check to tidyup some possible ReassociateOps. NFC. 

llvm-svn: 233495
This commit is contained in:
Simon Pilgrim 2015-03-29 16:49:51 +00:00
parent d0028dcb86
commit d15c2805ab
1 changed files with 5 additions and 10 deletions
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15
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -1618,8 +1618,7 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
N0C->getAPIntValue(), VT),
N0.getOperand(1));
// reassociate add
SDValue RADD = ReassociateOps(ISD::ADD, SDLoc(N), N0, N1);
if (RADD.getNode())
if (SDValue RADD = ReassociateOps(ISD::ADD, SDLoc(N), N0, N1))
return RADD;
// fold ((0-A) + B) -> B-A
if (N0.getOpcode() == ISD::SUB && isa<ConstantSDNode>(N0.getOperand(0)) &&
@ -2077,8 +2076,7 @@ SDValue DAGCombiner::visitMUL(SDNode *N) {
N0.getOperand(1), N1));
// reassociate mul
SDValue RMUL = ReassociateOps(ISD::MUL, SDLoc(N), N0, N1);
if (RMUL.getNode())
if (SDValue RMUL = ReassociateOps(ISD::MUL, SDLoc(N), N0, N1))
return RMUL;
return SDValue();
@ -2844,8 +2842,7 @@ SDValue DAGCombiner::visitAND(SDNode *N) {
APInt::getAllOnesValue(BitWidth)))
return DAG.getConstant(0, VT);
// reassociate and
SDValue RAND = ReassociateOps(ISD::AND, SDLoc(N), N0, N1);
if (RAND.getNode())
if (SDValue RAND = ReassociateOps(ISD::AND, SDLoc(N), N0, N1))
return RAND;
// fold (and (or x, C), D) -> D if (C & D) == D
if (N1C && N0.getOpcode() == ISD::OR)
@ -3574,8 +3571,7 @@ SDValue DAGCombiner::visitOR(SDNode *N) {
return BSwap;
// reassociate or
SDValue ROR = ReassociateOps(ISD::OR, SDLoc(N), N0, N1);
if (ROR.getNode())
if (SDValue ROR = ReassociateOps(ISD::OR, SDLoc(N), N0, N1))
return ROR;
// Canonicalize (or (and X, c1), c2) -> (and (or X, c2), c1|c2)
// iff (c1 & c2) == 0.
@ -3899,8 +3895,7 @@ SDValue DAGCombiner::visitXOR(SDNode *N) {
if (N1C && N1C->isNullValue())
return N0;
// reassociate xor
SDValue RXOR = ReassociateOps(ISD::XOR, SDLoc(N), N0, N1);
if (RXOR.getNode())
if (SDValue RXOR = ReassociateOps(ISD::XOR, SDLoc(N), N0, N1))
return RXOR;
// fold !(x cc y) -> (x !cc y)