diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/Transforms/Attributor/nofpclass.ll | 8 | ||||
| -rw-r--r-- | llvm/unittests/Analysis/ValueTrackingTest.cpp | 6 |
3 files changed, 10 insertions, 7 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index c25f02b..b8ca38d 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -4627,6 +4627,9 @@ void computeKnownFPClass(const Value *V, const APInt &DemandedElts, case Instruction::UIToFP: { // Cannot produce nan Known.knownNot(fcNan); + + // sitofp and uitofp turn into +0.0 for zero. + Known.knownNot(fcNegZero); if (Op->getOpcode() == Instruction::UIToFP) Known.signBitIsZero(); diff --git a/llvm/test/Transforms/Attributor/nofpclass.ll b/llvm/test/Transforms/Attributor/nofpclass.ll index 52c9c2e..0ae2de3 100644 --- a/llvm/test/Transforms/Attributor/nofpclass.ll +++ b/llvm/test/Transforms/Attributor/nofpclass.ll @@ -694,7 +694,7 @@ define float @uitofp_i32_to_f32(i32 %arg) { define float @sitofp_i32_to_f32(i32 %arg) { ; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none) -; CHECK-LABEL: define nofpclass(nan inf) float @sitofp_i32_to_f32 +; CHECK-LABEL: define nofpclass(nan inf nzero) float @sitofp_i32_to_f32 ; CHECK-SAME: (i32 [[ARG:%.*]]) #[[ATTR2]] { ; CHECK-NEXT: [[CVT:%.*]] = sitofp i32 [[ARG]] to float ; CHECK-NEXT: ret float [[CVT]] @@ -716,7 +716,7 @@ define <2 x float> @uitofp_v2i32_to_v2f32(<2 x i32> %arg) { define <2 x float> @sitofp_v2i32_to_v2i32(<2 x i32> %arg) { ; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none) -; CHECK-LABEL: define nofpclass(nan inf) <2 x float> @sitofp_v2i32_to_v2i32 +; CHECK-LABEL: define nofpclass(nan inf nzero) <2 x float> @sitofp_v2i32_to_v2i32 ; CHECK-SAME: (<2 x i32> [[ARG:%.*]]) #[[ATTR2]] { ; CHECK-NEXT: [[CVT:%.*]] = sitofp <2 x i32> [[ARG]] to <2 x float> ; CHECK-NEXT: ret <2 x float> [[CVT]] @@ -738,7 +738,7 @@ define half @uitofp_i17_to_f16(i17 %arg) { define half @sitofp_i17_to_f16(i17 %arg) { ; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none) -; CHECK-LABEL: define nofpclass(nan) half @sitofp_i17_to_f16 +; CHECK-LABEL: define nofpclass(nan nzero) half @sitofp_i17_to_f16 ; CHECK-SAME: (i17 [[ARG:%.*]]) #[[ATTR2]] { ; CHECK-NEXT: [[CVT:%.*]] = sitofp i17 [[ARG]] to half ; CHECK-NEXT: ret half [[CVT]] @@ -760,7 +760,7 @@ define <2 x half> @uitofp_v2i17_to_v2f16(<2 x i17> %arg) { define <2 x half> @sitofp_v2i17_to_v2i17(<2 x i17> %arg) { ; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none) -; CHECK-LABEL: define nofpclass(nan) <2 x half> @sitofp_v2i17_to_v2i17 +; CHECK-LABEL: define nofpclass(nan nzero) <2 x half> @sitofp_v2i17_to_v2i17 ; CHECK-SAME: (<2 x i17> [[ARG:%.*]]) #[[ATTR2]] { ; CHECK-NEXT: [[CVT:%.*]] = sitofp <2 x i17> [[ARG]] to <2 x half> ; CHECK-NEXT: ret <2 x half> [[CVT]] diff --git a/llvm/unittests/Analysis/ValueTrackingTest.cpp b/llvm/unittests/Analysis/ValueTrackingTest.cpp index 9327315..284d799 100644 --- a/llvm/unittests/Analysis/ValueTrackingTest.cpp +++ b/llvm/unittests/Analysis/ValueTrackingTest.cpp @@ -1539,9 +1539,9 @@ TEST_F(ComputeKnownFPClassTest, SIToFP) { " %A3 = sitofp i17 %arg2 to half" " ret float %A\n" "}\n"); - expectKnownFPClass(fcFinite, std::nullopt, A); - expectKnownFPClass(fcFinite, std::nullopt, A2); - expectKnownFPClass(~fcNan, std::nullopt, A3); + expectKnownFPClass(fcFinite & ~fcNegZero, std::nullopt, A); + expectKnownFPClass(fcFinite & ~fcNegZero, std::nullopt, A2); + expectKnownFPClass(~(fcNan | fcNegZero), std::nullopt, A3); } TEST_F(ComputeKnownFPClassTest, FAdd) { |