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| author | Zhou Sheng <zhousheng00@gmail.com> | 2007-03-23 03:13:21 +0000 |
|---|---|---|
| committer | Zhou Sheng <zhousheng00@gmail.com> | 2007-03-23 03:13:21 +0000 |
| commit | 0900993ebc6e260e089465f8072c19c24174c4f0 (patch) | |
| tree | 1a7467819c3ccfd1780c94bdb3eda9daba74a2b5 /llvm | |
| parent | 755f04b5d7c42c46b29680cf326a71d1c8a7992f (diff) | |
| download | bcm5719-llvm-0900993ebc6e260e089465f8072c19c24174c4f0.tar.gz bcm5719-llvm-0900993ebc6e260e089465f8072c19c24174c4f0.zip | |
Make the "KnownZero ^ TypeMask" computation just once.
llvm-svn: 35276
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index 6d4a8ddb265..9713bc8a37d 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -7136,9 +7136,10 @@ Instruction *InstCombiner::commonIntCastTransforms(CastInst &CI) { if (pred != ICmpInst::ICMP_NE && pred != ICmpInst::ICMP_EQ) break; - if ((KnownZero^TypeMask).isPowerOf2()) { // Exactly 1 possible 1? + APInt KnownZeroMask(KnownZero ^ TypeMask); + if (KnownZeroMask.isPowerOf2()) { // Exactly 1 possible 1? bool isNE = pred == ICmpInst::ICMP_NE; - if (Op1CV != 0 && (Op1CV != (KnownZero^TypeMask))) { + if (Op1CV != 0 && (Op1CV != KnownZeroMask)) { // (X&4) == 2 --> false // (X&4) != 2 --> true Constant *Res = ConstantInt::get(Type::Int1Ty, isNE); @@ -7146,7 +7147,7 @@ Instruction *InstCombiner::commonIntCastTransforms(CastInst &CI) { return ReplaceInstUsesWith(CI, Res); } - unsigned ShiftAmt = (KnownZero^TypeMask).logBase2(); + unsigned ShiftAmt = KnownZeroMask.logBase2(); Value *In = Op0; if (ShiftAmt) { // Perform a logical shr by shiftamt. |
