7fac1acc61
Functions can have local pragmas that override the global settings. We set the flags eagerly based on global settings, but if we emit an expression under the influence of a pragma, we clear the appropriate flags from the function. In order to avoid doing a ton of redundant work whenever we emit an FP expression, configure the IRBuilder to default to global settings, and only reconfigure it when we see an FP expression that's not using the global settings. Patch by Michele Scandale! https://reviews.llvm.org/D80462
45 lines
1.6 KiB
C++
45 lines
1.6 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 %a, float %b, float %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 %a, float %b, float %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 %a, float %b, float %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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