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45e8e08492
Since these assumptions are coming from OpenMP it makes sense to mark
them as such in the generic IR encoding. Standardized assumptions will
be named
omp_ASSUMPTION_NAME
and extensions will be named
ompx_ASSUMPTION_NAME
which is the OpenMP 5.2 syntax for "extensions" of any kind.
This also matches what the OpenMP-Opt pass expects.
Summarized,
#pragma omp [...] assume[s] no_parallelism
now generates the same IR assumption annotation as
__attribute__((assume("omp_no_parallelism")))
Reviewed By: jhuber6
Differential Revision: https://reviews.llvm.org/D105937
92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
// RUN: %clang_cc1 -verify -fopenmp -ast-print %s | FileCheck %s
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// RUN: %clang_cc1 -fopenmp -x c++ -std=c++11 -emit-pch -o %t %s
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// RUN: %clang_cc1 -fopenmp -std=c++11 -include-pch %t -fsyntax-only -verify %s -ast-print | FileCheck %s
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// RUN: %clang_cc1 -verify -fopenmp-simd -ast-print %s | FileCheck %s
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// RUN: %clang_cc1 -fopenmp-simd -x c++ -std=c++11 -emit-pch -o %t %s
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// RUN: %clang_cc1 -fopenmp-simd -std=c++11 -include-pch %t -fsyntax-only -verify %s -ast-print | FileCheck %s
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// expected-no-diagnostics
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// It is unclear if we want to annotate the template instantiations, e.g., S<int>::foo, or not in the two
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// situations shown below. Since it is always fair to drop assumptions, we do that for now.
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#ifndef HEADER
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#define HEADER
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template <typename T>
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struct S {
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int a;
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// CHECK: template <typename T> struct S {
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// CHECK: void foo() __attribute__((assume("ompx_global_assumption"))) {
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void foo() {
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#pragma omp parallel
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{}
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}
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};
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// CHECK: template<> struct S<int> {
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// CHECK: void foo() __attribute__((assume("ompx_global_assumption"))) {
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#pragma omp begin assumes no_openmp
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// CHECK: void S_with_assumes_no_call() __attribute__((assume("omp_no_openmp"))) __attribute__((assume("ompx_global_assumption"))) {
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void S_with_assumes_no_call() {
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S<int> s;
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s.a = 0;
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}
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// CHECK: void S_with_assumes_call() __attribute__((assume("omp_no_openmp"))) __attribute__((assume("ompx_global_assumption"))) {
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void S_with_assumes_call() {
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S<int> s;
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s.a = 0;
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// If this is executed we have UB!
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s.foo();
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}
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#pragma omp end assumes
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// CHECK: void S_without_assumes() __attribute__((assume("ompx_global_assumption"))) {
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void S_without_assumes() {
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S<int> s;
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s.foo();
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}
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#pragma omp assumes ext_global_assumption
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// Same as the struct S above but the order in which we instantiate P is different, first outside of an assumes.
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template <typename T>
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struct P {
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// CHECK: template <typename T> struct P {
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// CHECK: void foo() __attribute__((assume("ompx_global_assumption"))) {
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int a;
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void foo() {
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#pragma omp parallel
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{}
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}
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};
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// TODO: Avoid the duplication here:
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// CHECK: template<> struct P<int> {
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// CHECK: void foo() __attribute__((assume("ompx_global_assumption"))) __attribute__((assume("ompx_global_assumption"))) {
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// CHECK: void P_without_assumes() __attribute__((assume("ompx_global_assumption"))) {
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void P_without_assumes() {
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P<int> p;
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p.foo();
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}
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#pragma omp begin assumes no_openmp
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// CHECK: void P_with_assumes_no_call() __attribute__((assume("omp_no_openmp"))) __attribute__((assume("ompx_global_assumption"))) {
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void P_with_assumes_no_call() {
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P<int> p;
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p.a = 0;
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}
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// CHECK: void P_with_assumes_call() __attribute__((assume("omp_no_openmp"))) __attribute__((assume("ompx_global_assumption"))) {
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void P_with_assumes_call() {
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P<int> p;
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p.a = 0;
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// If this is executed we have UB!
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p.foo();
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}
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#pragma omp end assumes
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#endif
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