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: tail call float @llvm.fmuladd 7 #pragma STDC FP_CONTRACT ON 8 return a * b + c; 9 } 10 11 // Is FP_CONTRACT state cleared on exiting compound statements? 12 float fp_contract_2(float a, float b, float c) { 13 // CHECK: _Z13fp_contract_2fff 14 // CHECK: %[[M:.+]] = fmul float %a, %b 15 // CHECK-NEXT: fadd float %[[M]], %c 16 { 17 #pragma STDC FP_CONTRACT ON 18 } 19 return a * b + c; 20 } 21 22 // Does FP_CONTRACT survive template instantiation? 23 class Foo {}; 24 Foo operator+(Foo, Foo); 25 26 template <typename T> 27 T template_muladd(T a, T b, T c) { 28 #pragma STDC FP_CONTRACT ON 29 return a * b + c; 30 } 31 32 float fp_contract_3(float a, float b, float c) { 33 // CHECK: _Z13fp_contract_3fff 34 // CHECK: tail call float @llvm.fmuladd 35 return template_muladd<float>(a, b, c); 36 } 37 38 template<typename T> class fp_contract_4 { 39 float method(float a, float b, float c) { 40 #pragma STDC FP_CONTRACT ON 41 return a * b + c; 42 } 43 }; 44 45 template class fp_contract_4<int>; 46 // CHECK: _ZN13fp_contract_4IiE6methodEfff 47 // CHECK: tail call float @llvm.fmuladd 48 49 // Check file-scoped FP_CONTRACT 50 #pragma STDC FP_CONTRACT ON 51 float fp_contract_5(float a, float b, float c) { 52 // CHECK: _Z13fp_contract_5fff 53 // CHECK: tail call float @llvm.fmuladd 54 return a * b + c; 55 } 56 57 #pragma STDC FP_CONTRACT OFF 58 float fp_contract_6(float a, float b, float c) { 59 // CHECK: _Z13fp_contract_6fff 60 // CHECK: %[[M:.+]] = fmul float %a, %b 61 // CHECK-NEXT: fadd float %[[M]], %c 62 return a * b + c; 63 } 64 65 // If the multiply has multiple uses, don't produce fmuladd. 66 // This used to assert (PR25719): 67 // https://llvm.org/bugs/show_bug.cgi?id=25719 68 69 float fp_contract_7(float a, float b, float c) { 70 // CHECK: _Z13fp_contract_7fff 71 // CHECK: %[[M:.+]] = fmul float %b, 2.000000e+00 72 // CHECK-NEXT: fsub float %[[M]], %c 73 #pragma STDC FP_CONTRACT ON 74 return (a = 2 * b) - c; 75 } 76 77
