diff options
Diffstat (limited to 'contrib/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/contrib/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/contrib/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index bc2405b9..c741982 100644 --- a/contrib/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/contrib/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -7325,6 +7325,7 @@ SDValue DAGCombiner::visitBITCAST(SDNode *N) { // fold (bitcast (fneg x)) -> // flipbit = signbit // (xor (bitcast x) (build_pair flipbit, flipbit)) + // // fold (bitcast (fabs x)) -> // flipbit = (and (extract_element (bitcast x), 0), signbit) // (xor (bitcast x) (build_pair flipbit, flipbit)) @@ -8794,20 +8795,21 @@ SDValue DAGCombiner::visitFSQRT(SDNode *N) { ZeroCmp, Zero, RV); } +/// copysign(x, fp_extend(y)) -> copysign(x, y) +/// copysign(x, fp_round(y)) -> copysign(x, y) static inline bool CanCombineFCOPYSIGN_EXTEND_ROUND(SDNode *N) { - // copysign(x, fp_extend(y)) -> copysign(x, y) - // copysign(x, fp_round(y)) -> copysign(x, y) - // Do not optimize out type conversion of f128 type yet. - // For some target like x86_64, configuration is changed - // to keep one f128 value in one SSE register, but - // instruction selection cannot handle FCOPYSIGN on - // SSE registers yet. SDValue N1 = N->getOperand(1); - EVT N1VT = N1->getValueType(0); - EVT N1Op0VT = N1->getOperand(0)->getValueType(0); - return (N1.getOpcode() == ISD::FP_EXTEND || - N1.getOpcode() == ISD::FP_ROUND) && - (N1VT == N1Op0VT || N1Op0VT != MVT::f128); + if ((N1.getOpcode() == ISD::FP_EXTEND || + N1.getOpcode() == ISD::FP_ROUND)) { + // Do not optimize out type conversion of f128 type yet. + // For some targets like x86_64, configuration is changed to keep one f128 + // value in one SSE register, but instruction selection cannot handle + // FCOPYSIGN on SSE registers yet. + EVT N1VT = N1->getValueType(0); + EVT N1Op0VT = N1->getOperand(0)->getValueType(0); + return (N1VT == N1Op0VT || N1Op0VT != MVT::f128); + } + return false; } SDValue DAGCombiner::visitFCOPYSIGN(SDNode *N) { |
