diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp index 09ab16511e7..2dafa58d305 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -2139,10 +2139,6 @@ bool InstCombiner::OptimizeOverflowCheck(OverflowCheckFlavor OCF, Value *LHS, } // FALL THROUGH uadd into sadd case OCF_SIGNED_ADD: { - // X + undef -> undef - if (isa<UndefValue>(RHS)) - return SetResult(RHS, UndefValue::get(Builder->getInt1Ty()), false); - // X + 0 -> {X, false} if (match(RHS, m_Zero())) return SetResult(LHS, Builder->getFalse(), false); @@ -2157,14 +2153,6 @@ bool InstCombiner::OptimizeOverflowCheck(OverflowCheckFlavor OCF, Value *LHS, case OCF_UNSIGNED_SUB: case OCF_SIGNED_SUB: { - // undef - X -> undef - if (isa<UndefValue>(LHS)) - return SetResult(LHS, UndefValue::get(Builder->getInt1Ty()), false); - - // X - undef -> undef - if (isa<UndefValue>(RHS)) - return SetResult(RHS, UndefValue::get(Builder->getInt1Ty()), false); - // X - 0 -> {X, false} if (match(RHS, m_Zero())) return SetResult(LHS, Builder->getFalse(), false); |
