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teak-llvm/clang/test/CodeGen/fpconstrained-cmp-float.c
Ulrich Weigand 76e9c2a987 [FPEnv] Generate constrained FP comparisons from clang 
Update the IRBuilder to generate constrained FP comparisons in
CreateFCmp when IsFPConstrained is true, similar to the other
places in the IRBuilder.

Also, add a new CreateFCmpS to emit signaling FP comparisons,
and use it in clang where comparisons are supposed to be signaling
(currently, only when emitting code for the <, <=, >, >= operators).

Note that there is currently no way to add fast-math flags to a
constrained FP comparison, since this is implemented as an intrinsic
call that returns a boolean type, and FMF are only allowed for calls
returning a floating-point type. However, given the discussion around
https://bugs.llvm.org/show_bug.cgi?id=42179, it seems that FCmp itself
really shouldn't have any FMF either, so this is probably OK.

Reviewed by: craig.topper

Differential Revision: https://reviews.llvm.org/D71467
2020-01-10 14:33:10 +01:00

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// RUN: %clang_cc1 -ffp-exception-behavior=ignore -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=FCMP
// RUN: %clang_cc1 -ffp-exception-behavior=strict -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=EXCEPT
// RUN: %clang_cc1 -ffp-exception-behavior=maytrap -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=MAYTRAP
// RUN: %clang_cc1 -frounding-math -ffp-exception-behavior=ignore -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=IGNORE
// RUN: %clang_cc1 -frounding-math -ffp-exception-behavior=strict -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=EXCEPT
// RUN: %clang_cc1 -frounding-math -ffp-exception-behavior=maytrap -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=MAYTRAP
_Bool QuietEqual(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietEqual(float %f1, float %f2)
// FCMP: fcmp oeq float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"oeq", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"oeq", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"oeq", metadata !"fpexcept.maytrap")
return f1 == f2;
// CHECK: ret
}
_Bool QuietNotEqual(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietNotEqual(float %f1, float %f2)
// FCMP: fcmp une float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"une", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"une", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"une", metadata !"fpexcept.maytrap")
return f1 != f2;
// CHECK: ret
}
_Bool SignalingLess(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @SignalingLess(float %f1, float %f2)
// FCMP: fcmp olt float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"olt", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"olt", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"olt", metadata !"fpexcept.maytrap")
return f1 < f2;
// CHECK: ret
}
_Bool SignalingLessEqual(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @SignalingLessEqual(float %f1, float %f2)
// FCMP: fcmp ole float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"ole", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"ole", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"ole", metadata !"fpexcept.maytrap")
return f1 <= f2;
// CHECK: ret
}
_Bool SignalingGreater(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @SignalingGreater(float %f1, float %f2)
// FCMP: fcmp ogt float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"ogt", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"ogt", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"ogt", metadata !"fpexcept.maytrap")
return f1 > f2;
// CHECK: ret
}
_Bool SignalingGreaterEqual(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @SignalingGreaterEqual(float %f1, float %f2)
// FCMP: fcmp oge float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"oge", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"oge", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmps.f32(float %{{.*}}, float %{{.*}}, metadata !"oge", metadata !"fpexcept.maytrap")
return f1 >= f2;
// CHECK: ret
}
_Bool QuietLess(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietLess(float %f1, float %f2)
// FCMP: fcmp olt float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"olt", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"olt", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"olt", metadata !"fpexcept.maytrap")
return __builtin_isless(f1, f2);
// CHECK: ret
}
_Bool QuietLessEqual(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietLessEqual(float %f1, float %f2)
// FCMP: fcmp ole float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"ole", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"ole", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"ole", metadata !"fpexcept.maytrap")
return __builtin_islessequal(f1, f2);
// CHECK: ret
}
_Bool QuietGreater(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietGreater(float %f1, float %f2)
// FCMP: fcmp ogt float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"ogt", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"ogt", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"ogt", metadata !"fpexcept.maytrap")
return __builtin_isgreater(f1, f2);
// CHECK: ret
}
_Bool QuietGreaterEqual(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietGreaterEqual(float %f1, float %f2)
// FCMP: fcmp oge float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"oge", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"oge", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"oge", metadata !"fpexcept.maytrap")
return __builtin_isgreaterequal(f1, f2);
// CHECK: ret
}
_Bool QuietLessGreater(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietLessGreater(float %f1, float %f2)
// FCMP: fcmp one float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"one", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"one", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"one", metadata !"fpexcept.maytrap")
return __builtin_islessgreater(f1, f2);
// CHECK: ret
}
_Bool QuietUnordered(float f1, float f2) {
// CHECK-LABEL: define {{.*}}i1 @QuietUnordered(float %f1, float %f2)
// FCMP: fcmp uno float %{{.*}}, %{{.*}}
// IGNORE: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"uno", metadata !"fpexcept.ignore")
// EXCEPT: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"uno", metadata !"fpexcept.strict")
// MAYTRAP: call i1 @llvm.experimental.constrained.fcmp.f32(float %{{.*}}, float %{{.*}}, metadata !"uno", metadata !"fpexcept.maytrap")
return __builtin_isunordered(f1, f2);
// CHECK: ret
}
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