2d4f80f78a
directive. According to OpenMP 5.0, The atomic_default_mem_order clause specifies the default memory ordering behavior for atomic constructs that must be provided by an implementation. If the default memory ordering is specified as seq_cst, all atomic constructs on which memory-order-clause is not specified behave as if the seq_cst clause appears. If the default memory ordering is specified as relaxed, all atomic constructs on which memory-order-clause is not specified behave as if the relaxed clause appears. If the default memory ordering is specified as acq_rel, atomic constructs on which memory-order-clause is not specified behave as if the release clause appears if the atomic write or atomic update operation is specified, as if the acquire clause appears if the atomic read operation is specified, and as if the acq_rel clause appears if the atomic captured update operation is specified.
40 lines
1.4 KiB
C++
40 lines
1.4 KiB
C++
// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=50 %s -triple x86_64-apple-darwin10 -x c++ -emit-llvm -o - | FileCheck %s
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// RUN: %clang_cc1 -fopenmp -fopenmp-version=50 -x c++ -std=c++11 -emit-pch -o %t %s -triple x86_64-apple-darwin10
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// RUN: %clang_cc1 -fopenmp -fopenmp-version=50 -std=c++11 -include-pch %t -verify %s -triple x86_64-apple-darwin10 -x c++ -emit-llvm -o -| FileCheck %s
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// RUN: %clang_cc1 -verify -fopenmp-simd %s -fopenmp-version=50 -x c++ -emit-llvm -triple x86_64-apple-darwin10 -o -| FileCheck %s --check-prefix SIMD-ONLY0
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// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=50 -x c++ -std=c++11 -emit-pch -o %t %s -triple x86_64-apple-darwin10
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// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=50 -std=c++11 -include-pch %t -verify %s -emit-llvm -x c++ -emit-llvm -triple x86_64-apple-darwin10 -o -| FileCheck %s --check-prefix SIMD-ONLY0
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// SIMD-ONLY0-NOT: {{__kmpc|__tgt}}
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// expected-no-diagnostics
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#ifndef HEADER
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#define HEADER
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#pragma omp requires atomic_default_mem_order(acq_rel)
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// CHECK-LABEL: foo
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void foo() {
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int a = 0, b = 0;
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// CHECK: load atomic i32,{{.*}}acquire
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#pragma omp atomic read
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a = b;
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// CHECK: store atomic i32{{.*}}release
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#pragma omp atomic write
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a = b;
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// CHECK: atomicrmw add i32{{.*}}release
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#pragma omp atomic
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a += 1;
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// CHECK: atomicrmw add i32{{.*}}release
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#pragma omp atomic update
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a += 1;
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// CHECK: atomicrmw add i32{{.*}}acq_rel
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#pragma omp atomic capture
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{
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b = a;
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a += 1;
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}
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}
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#endif
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