diff options
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index c96741aacd..98a36545ad 100644 --- a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/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; } |