1 // RUN: %clang_cc1 -O3 -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
2 
3 // Is FP_CONTRACT honored in a simple case?
4 float fp_contract_1(float a, float b, float c) {
5 // CHECK: _Z13fp_contract_1fff
6 // CHECK: %[[M:.+]] = fmul contract float %a, %b
7 // CHECK-NEXT: fadd contract float %[[M]], %c
8 #pragma clang fp contract(fast)
9   return a * b + c;
10 }
11 
12 // Is FP_CONTRACT state cleared on exiting compound statements?
13 float fp_contract_2(float a, float b, float c) {
14   // CHECK: _Z13fp_contract_2fff
15   // CHECK: %[[M:.+]] = fmul float %a, %b
16   // CHECK-NEXT: fadd float %[[M]], %c
17   {
18 #pragma clang fp contract(fast)
19   }
20   return a * b + c;
21 }
22 
23 // Does FP_CONTRACT survive template instantiation?
24 class Foo {};
25 Foo operator+(Foo, Foo);
26 
27 template <typename T>
28 T template_muladd(T a, T b, T c) {
29 #pragma clang fp contract(fast)
30   return a * b + c;
31 }
32 
33 float fp_contract_3(float a, float b, float c) {
34   // CHECK: _Z13fp_contract_3fff
35   // CHECK: %[[M:.+]] = fmul contract float %a, %b
36   // CHECK-NEXT: fadd contract float %[[M]], %c
37   return template_muladd<float>(a, b, c);
38 }
39 
40 template <typename T>
41 class fp_contract_4 {
42   float method(float a, float b, float c) {
43 #pragma clang fp contract(fast)
44     return a * b + c;
45   }
46 };
47 
48 template class fp_contract_4<int>;
49 // CHECK: _ZN13fp_contract_4IiE6methodEfff
50 // CHECK: %[[M:.+]] = fmul contract float %a, %b
51 // CHECK-NEXT: fadd contract float %[[M]], %c
52 
53 // Check file-scoped FP_CONTRACT
54 #pragma clang fp contract(fast)
55 float fp_contract_5(float a, float b, float c) {
56   // CHECK: _Z13fp_contract_5fff
57   // CHECK: %[[M:.+]] = fmul contract float %a, %b
58   // CHECK-NEXT: fadd contract float %[[M]], %c
59   return a * b + c;
60 }
61 
62 // Verify that we can handle multiple flags on the same pragma
63 #pragma clang fp contract(fast) contract(off)
64 float fp_contract_6(float a, float b, float c) {
65   // CHECK: _Z13fp_contract_6fff
66   // CHECK: %[[M:.+]] = fmul float %a, %b
67   // CHECK-NEXT: fadd float %[[M]], %c
68   return a * b + c;
69 }
70