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