1b1c8d83d3
Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions. I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default. Test updates are made as a separate patch: D108453 Reviewed By: eugenis Differential Revision: https://reviews.llvm.org/D105169
45 lines
1.7 KiB
C++
45 lines
1.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-linux-gnu -ffast-math -ffp-contract=fast -emit-llvm -o - %s | FileCheck %s
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float test_default(float a, float b, float c) {
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float tmp = a;
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tmp += b;
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tmp += c;
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return tmp;
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}
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// CHECK: define{{.*}} float @_Z12test_defaultfff(float noundef %a, float noundef %b, float noundef %c) [[FAST_ATTRS:#[0-9]+]]
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// CHECK: fadd fast float {{%.+}}, {{%.+}}
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// CHECK: fadd fast float {{%.+}}, {{%.+}}
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float test_precise_on_pragma(float a, float b, float c) {
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float tmp = a;
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{
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#pragma float_control(precise, on)
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tmp += b;
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}
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tmp += c;
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return tmp;
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}
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// CHECK: define{{.*}} float @_Z22test_precise_on_pragmafff(float noundef %a, float noundef %b, float noundef %c) [[PRECISE_ATTRS:#[0-9]+]]
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// CHECK: fadd float {{%.+}}, {{%.+}}
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// CHECK: fadd fast float {{%.+}}, {{%.+}}
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float test_reassociate_off_pragma(float a, float b, float c) {
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float tmp = a;
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{
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#pragma clang fp reassociate(off)
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tmp += b;
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}
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tmp += c;
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return tmp;
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}
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// CHECK: define{{.*}} float @_Z27test_reassociate_off_pragmafff(float noundef %a, float noundef %b, float noundef %c) [[NOREASSOC_ATTRS:#[0-9]+]]
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// CHECK: fadd nnan ninf nsz arcp contract afn float {{%.+}}, {{%.+}}
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// CHECK: fadd fast float {{%.+}}, {{%.+}}
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// CHECK: attributes [[FAST_ATTRS]] = { {{.*}}"no-infs-fp-math"="true" {{.*}}"no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" {{.*}}"unsafe-fp-math"="true"{{.*}} }
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// CHECK: attributes [[PRECISE_ATTRS]] = { {{.*}}"no-infs-fp-math"="false" {{.*}}"no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" {{.*}}"unsafe-fp-math"="false"{{.*}} }
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// CHECK: attributes [[NOREASSOC_ATTRS]] = { {{.*}}"no-infs-fp-math"="true" {{.*}}"no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" {{.*}}"unsafe-fp-math"="false"{{.*}} }
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