1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
// RUN: %clang_cc1 -O3 -triple %itanium_abi_triple \
// RUN: -emit-llvm -o - %s \
// RUN: | FileCheck -check-prefixes=COMMON,CHECK %s
// RUN: %clang_cc1 -fexperimental-strict-floating-point \
// RUN: -ffp-exception-behavior=strict -O3 \
// RUN: -triple %itanium_abi_triple -emit-llvm -o - %s \
// RUN: | FileCheck -check-prefixes=COMMON,STRICT %s
// Is FP_CONTRACT honored in a simple case?
float fp_contract_1(float a, float b, float c) {
// COMMON: _Z13fp_contract_1fff
// CHECK: %[[M:.+]] = fmul contract float %a, %b
// CHECK-NEXT: fadd contract float %[[M]], %c
// STRICT: %[[M:.+]] = tail call contract float @llvm.experimental.constrained.fmul.f32(float %a, float %b, metadata !"round.tonearest", metadata !"fpexcept.strict")
// STRICT-NEXT: tail call contract float @llvm.experimental.constrained.fadd.f32(float %[[M]], float %c, metadata !"round.tonearest", metadata !"fpexcept.strict")
#pragma clang fp contract(fast)
return a * b + c;
}
// Is FP_CONTRACT state cleared on exiting compound statements?
float fp_contract_2(float a, float b, float c) {
// COMMON: _Z13fp_contract_2fff
// CHECK: %[[M:.+]] = fmul float %a, %b
// CHECK-NEXT: fadd float %[[M]], %c
// STRICT: %[[M:.+]] = tail call float @llvm.experimental.constrained.fmul.f32(float %a, float %b, metadata !"round.tonearest", metadata !"fpexcept.strict")
// STRICT-NEXT: tail call float @llvm.experimental.constrained.fadd.f32(float %[[M]], float %c, metadata !"round.tonearest", metadata !"fpexcept.strict")
{
#pragma clang fp contract(fast)
}
return a * b + c;
}
// Does FP_CONTRACT survive template instantiation?
class Foo {};
Foo operator+(Foo, Foo);
template <typename T>
T template_muladd(T a, T b, T c) {
#pragma clang fp contract(fast)
return a * b + c;
}
float fp_contract_3(float a, float b, float c) {
// COMMON: _Z13fp_contract_3fff
// CHECK: %[[M:.+]] = fmul contract float %a, %b
// CHECK-NEXT: fadd contract float %[[M]], %c
// STRICT: %[[M:.+]] = tail call contract float @llvm.experimental.constrained.fmul.f32(float %a, float %b, metadata !"round.tonearest", metadata !"fpexcept.strict")
// STRICT-NEXT: tail call contract noundef float @llvm.experimental.constrained.fadd.f32(float %[[M]], float %c, metadata !"round.tonearest", metadata !"fpexcept.strict")
return template_muladd<float>(a, b, c);
}
template <typename T>
class fp_contract_4 {
float method(float a, float b, float c) {
#pragma clang fp contract(fast)
return a * b + c;
}
};
template class fp_contract_4<int>;
// COMMON: _ZN13fp_contract_4IiE6methodEfff
// CHECK: %[[M:.+]] = fmul contract float %a, %b
// CHECK-NEXT: fadd contract float %[[M]], %c
// STRICT: %[[M:.+]] = tail call contract float @llvm.experimental.constrained.fmul.f32(float %a, float %b, metadata !"round.tonearest", metadata !"fpexcept.strict")
// STRICT-NEXT: tail call contract float @llvm.experimental.constrained.fadd.f32(float %[[M]], float %c, metadata !"round.tonearest", metadata !"fpexcept.strict")
// Check file-scoped FP_CONTRACT
#pragma clang fp contract(fast)
float fp_contract_5(float a, float b, float c) {
// COMMON: _Z13fp_contract_5fff
// CHECK: %[[M:.+]] = fmul contract float %a, %b
// CHECK-NEXT: fadd contract float %[[M]], %c
// STRICT: %[[M:.+]] = tail call contract float @llvm.experimental.constrained.fmul.f32(float %a, float %b, metadata !"round.tonearest", metadata !"fpexcept.strict")
// STRICT-NEXT: tail call contract float @llvm.experimental.constrained.fadd.f32(float %[[M]], float %c, metadata !"round.tonearest", metadata !"fpexcept.strict")
return a * b + c;
}
// Verify that we can handle multiple flags on the same pragma
#pragma clang fp contract(fast) contract(off)
float fp_contract_6(float a, float b, float c) {
// COMMON: _Z13fp_contract_6fff
// CHECK: %[[M:.+]] = fmul float %a, %b
// CHECK-NEXT: fadd float %[[M]], %c
// STRICT: %[[M:.+]] = tail call float @llvm.experimental.constrained.fmul.f32(float %a, float %b, metadata !"round.tonearest", metadata !"fpexcept.strict")
// STRICT-NEXT: tail call float @llvm.experimental.constrained.fadd.f32(float %[[M]], float %c, metadata !"round.tonearest", metadata !"fpexcept.strict")
return a * b + c;
}
#pragma clang fp contract(fast)
float fp_contract_7(float a) {
// COMMON: _Z13fp_contract_7f
// CHECK: tail call contract float @llvm.sqrt.f32(float %a)
// STRICT: tail call contract float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.strict")
return __builtin_sqrtf(a);
}
float fp_contract_8(float a) {
// COMMON: _Z13fp_contract_8f
// CHECK: tail call float @llvm.sqrt.f32(float %a)
// STRICT: tail call float @llvm.experimental.constrained.sqrt.f32(float %a, metadata !"round.tonearest", metadata !"fpexcept.strict")
#pragma clang fp contract(off)
return __builtin_sqrtf(a);
}
|
