diff options
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 5 | ||||
| -rw-r--r-- | llvm/test/Transforms/InstSimplify/floating-point-compare.ll | 8 |
2 files changed, 7 insertions, 6 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index 7c16b21c928..54575441b71 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -3136,6 +3136,11 @@ bool llvm::isKnownNeverNaN(const Value *V, const TargetLibraryInfo *TLI, case Intrinsic::sqrt: return isKnownNeverNaN(II->getArgOperand(0), TLI, Depth + 1) && CannotBeOrderedLessThanZero(II->getArgOperand(0), TLI); + case Intrinsic::minnum: + case Intrinsic::maxnum: + // If either operand is not NaN, the result is not NaN. + return isKnownNeverNaN(II->getArgOperand(0), TLI, Depth + 1) || + isKnownNeverNaN(II->getArgOperand(1), TLI, Depth + 1); default: return false; } diff --git a/llvm/test/Transforms/InstSimplify/floating-point-compare.ll b/llvm/test/Transforms/InstSimplify/floating-point-compare.ll index a2785fab84d..1a1afbe9133 100644 --- a/llvm/test/Transforms/InstSimplify/floating-point-compare.ll +++ b/llvm/test/Transforms/InstSimplify/floating-point-compare.ll @@ -487,9 +487,7 @@ define i1 @orderedLessZeroMaximum(float, float) { define i1 @minnum_non_nan(float %x) { ; CHECK-LABEL: @minnum_non_nan( -; CHECK-NEXT: [[MIN:%.*]] = call float @llvm.minnum.f32(float 5.000000e-01, float [[X:%.*]]) -; CHECK-NEXT: [[CMP:%.*]] = fcmp ord float [[MIN]], 1.000000e+00 -; CHECK-NEXT: ret i1 [[CMP]] +; CHECK-NEXT: ret i1 true ; %min = call float @llvm.minnum.f32(float 0.5, float %x) %cmp = fcmp ord float %min, 1.0 @@ -498,9 +496,7 @@ define i1 @minnum_non_nan(float %x) { define i1 @maxnum_non_nan(float %x) { ; CHECK-LABEL: @maxnum_non_nan( -; CHECK-NEXT: [[MIN:%.*]] = call float @llvm.maxnum.f32(float [[X:%.*]], float 4.200000e+01) -; CHECK-NEXT: [[CMP:%.*]] = fcmp uno float [[MIN]], 1.200000e+01 -; CHECK-NEXT: ret i1 [[CMP]] +; CHECK-NEXT: ret i1 false ; %min = call float @llvm.maxnum.f32(float %x, float 42.0) %cmp = fcmp uno float %min, 12.0 |
