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| author | Sanjay Patel <spatel@rotateright.com> | 2017-04-04 16:54:58 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2017-04-04 16:54:58 +0000 |
| commit | ac618383e3507d21d5b451f121a6123bb8084326 (patch) | |
| tree | d7a4fec8b39e15c70ffaa9150a997c6a3d9c10fa | |
| parent | 297908da5ba2195d92ce05701c0fe6e0d5edb19a (diff) | |
| download | bcm5719-llvm-ac618383e3507d21d5b451f121a6123bb8084326.tar.gz bcm5719-llvm-ac618383e3507d21d5b451f121a6123bb8084326.zip | |
[x86] remove dead select-of-constants transform; NFCI
https://reviews.llvm.org/D30537 / https://reviews.llvm.org/rL296977 added these transforms
and other related transforms to the generic DAGCombiner (with a hook that x86 sets to true),
so these patterns should not exist by the time we reach the target-specific combiner hook.
llvm-svn: 299448
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 22afa6995cc..3474a9342c7 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -29767,18 +29767,6 @@ static SDValue combineSelectOfTwoConstants(SDNode *N, SelectionDAG &DAG) { DAG.getConstant(ShAmt, DL, MVT::i8)); } - // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. - if (FalseC->getAPIntValue() + 1 == TrueC->getAPIntValue()) { - if (NeedsCondInvert) // Invert the condition if needed. - Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond, - DAG.getConstant(1, DL, Cond.getValueType())); - - // Zero extend the condition if needed. - Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0), Cond); - return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond, - SDValue(FalseC, 0)); - } - // Optimize cases that will turn into an LEA instruction. This requires // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9). if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) { |
