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| author | Chris Lattner <sabre@nondot.org> | 2011-05-22 18:26:48 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-05-22 18:26:48 +0000 |
| commit | 162dfc3e6bc536a8a629002953c322cc82b8ed61 (patch) | |
| tree | b7e6e98a96138c414d86bb19756426e7c53bbf8b /llvm/lib/Transforms | |
| parent | 2a746bfe368e839439f5d8942fdd14ed6bd8a6f5 (diff) | |
| download | bcm5719-llvm-162dfc3e6bc536a8a629002953c322cc82b8ed61.tar.gz bcm5719-llvm-162dfc3e6bc536a8a629002953c322cc82b8ed61.zip | |
add some random notes.
llvm-svn: 131862
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index c96741aacd2..98a36545ad7 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp @@ -40,6 +40,11 @@ static Value *simplifyValueKnownNonZero(Value *V, InstCombiner &IC) { return IC.Builder->CreateShl(One, A); } + // TODO: Lots more we could do here: + // "1 >> X" could get an "isexact" bit. + // If V is a phi node, we can call this on each of its operands. + // "select cond, X, 0" can simplify to "X". + return 0; } |
