92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
|
// RUN: %clang_cc1 -O3 -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
|
||
|
|
|
||
|
|
// Is FP_CONTRACT honored in a simple case?
|
||
|
|
float fp_contract_1(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_1fff
|
||
|
|
// CHECK: tail call float @llvm.fmuladd
|
||
|
|
#pragma STDC FP_CONTRACT ON
|
||
|
|
return a * b + c;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Is FP_CONTRACT state cleared on exiting compound statements?
|
||
|
|
float fp_contract_2(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_2fff
|
||
|
|
// CHECK: %[[M:.+]] = fmul float %a, %b
|
||
|
|
// CHECK-NEXT: fadd float %[[M]], %c
|
||
|
|
{
|
||
|
|
#pragma STDC FP_CONTRACT ON
|
||
|
|
}
|
||
|
|
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 STDC FP_CONTRACT ON
|
||
|
|
return a * b + c;
|
||
|
|
}
|
||
|
|
|
||
|
|
float fp_contract_3(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_3fff
|
||
|
|
// CHECK: tail call float @llvm.fmuladd
|
||
|
|
return template_muladd<float>(a, b, c);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T> class fp_contract_4 {
|
||
|
|
float method(float a, float b, float c) {
|
||
|
|
#pragma STDC FP_CONTRACT ON
|
||
|
|
return a * b + c;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template class fp_contract_4<int>;
|
||
|
|
// CHECK: _ZN13fp_contract_4IiE6methodEfff
|
||
|
|
// CHECK: tail call float @llvm.fmuladd
|
||
|
|
|
||
|
|
// Check file-scoped FP_CONTRACT
|
||
|
|
#pragma STDC FP_CONTRACT ON
|
||
|
|
float fp_contract_5(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_5fff
|
||
|
|
// CHECK: tail call float @llvm.fmuladd
|
||
|
|
return a * b + c;
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma STDC FP_CONTRACT OFF
|
||
|
|
float fp_contract_6(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_6fff
|
||
|
|
// CHECK: %[[M:.+]] = fmul float %a, %b
|
||
|
|
// CHECK-NEXT: fadd float %[[M]], %c
|
||
|
|
return a * b + c;
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the multiply has multiple uses, don't produce fmuladd.
|
||
|
|
// This used to assert (PR25719):
|
||
|
|
// https://llvm.org/bugs/show_bug.cgi?id=25719
|
||
|
|
|
||
|
|
float fp_contract_7(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_7fff
|
||
|
|
// CHECK: %[[M:.+]] = fmul float %b, 2.000000e+00
|
||
|
|
// CHECK-NEXT: fsub float %[[M]], %c
|
||
|
|
#pragma STDC FP_CONTRACT ON
|
||
|
|
return (a = 2 * b) - c;
|
||
|
|
}
|
||
|
|
|
||
|
|
float fp_contract_8(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_8fff
|
||
|
|
// CHECK: fneg float %c
|
||
|
|
// CHECK: tail call float @llvm.fmuladd
|
||
|
|
#pragma STDC FP_CONTRACT ON
|
||
|
|
return a * b - c;
|
||
|
|
}
|
||
|
|
|
||
|
|
float fp_contract_9(float a, float b, float c) {
|
||
|
|
// CHECK: _Z13fp_contract_9fff
|
||
|
|
// CHECK: fneg float %a
|
||
|
|
// CHECK: tail call float @llvm.fmuladd
|
||
|
|
#pragma STDC FP_CONTRACT ON
|
||
|
|
return c - a * b;
|
||
|
|
}
|