diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp index e23e85bb16a..f96d91527fa 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -3695,6 +3695,7 @@ Instruction *InstCombiner::foldICmpBinOp(ICmpInst &I) { C == Op0 ? D : C); // icmp (X+Y), (X+Z) -> icmp Y, Z for equalities or if there is no overflow. + // TODO: The one-use checks should not be necessary. if (A && C && (A == C || A == D || B == C || B == D) && NoOp0WrapProblem && NoOp1WrapProblem && // Try not to increase register pressure. @@ -3842,11 +3843,11 @@ Instruction *InstCombiner::foldICmpBinOp(ICmpInst &I) { return new ICmpInst(Pred, C, D); // icmp (Y-X), (Z-X) -> icmp Y, Z for equalities or if there is no overflow. - if (B && D && B == D && NoOp0WrapProblem && NoOp1WrapProblem && - // Try not to increase register pressure. - BO0->hasOneUse() && BO1->hasOneUse()) + if (B && D && B == D && NoOp0WrapProblem && NoOp1WrapProblem) return new ICmpInst(Pred, A, C); + // icmp (X-Y), (X-Z) -> icmp Z, Y for equalities or if there is no overflow. + // TODO: The one-use checks should not be necessary. if (A && C && A == C && NoOp0WrapProblem && NoOp1WrapProblem && // Try not to increase register pressure. BO0->hasOneUse() && BO1->hasOneUse()) |
