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| author | Bill Wendling <isanbard@gmail.com> | 2008-12-02 05:09:00 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-12-02 05:09:00 +0000 |
| commit | 236a119dc811552af28e6a9908127b8ad7fb36b0 (patch) | |
| tree | 40a4f4355be0b90b17a51adafbfd960f23b52435 /lib/Transforms/Scalar/InstructionCombining.cpp | |
| parent | fc5b8e67e57fe042e9fba29f20d96eae4fa3188a (diff) | |
| download | external_llvm-236a119dc811552af28e6a9908127b8ad7fb36b0.zip external_llvm-236a119dc811552af28e6a9908127b8ad7fb36b0.tar.gz external_llvm-236a119dc811552af28e6a9908127b8ad7fb36b0.tar.bz2 | |
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60398 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 109e76a..7ad75d2 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -4437,14 +4437,13 @@ Instruction *InstCombiner::FoldOrOfICmps(Instruction &I, /// FoldOrWithConstants - This helper function folds: /// -/// ((A | B) & 1) | (B & -2) +/// ((A | B) & C1) | (B & C2) /// /// into: /// -/// (A & 1) | B +/// (A & C1) | B /// -/// The constants aren't important. Only that they don't overlap. (I.e., the XOR -/// of the two constants is "all ones".) +/// when the XOR of the two constants is "all ones" (-1). Instruction *InstCombiner::FoldOrWithConstants(BinaryOperator &I, Value *Op, Value *A, Value *B, Value *C) { ConstantInt *CI1 = dyn_cast<ConstantInt>(C); |