94a4f0cb5f
Add parsing, sema analysis and serialization/deserialization for 'declare reduction' construct. User-defined reductions are defined as #pragma omp declare reduction( reduction-identifier : typename-list : combiner ) [initializer ( initializer-expr )] These custom reductions may be used in 'reduction' clauses of OpenMP constructs. The combiner specifies how partial results can be combined into a single value. The combiner can use the special variable identifiers omp_in and omp_out that are of the type of the variables being reduced with this reduction-identifier. Each of them will denote one of the values to be combined before executing the combiner. It is assumed that the special omp_out identifier will refer to the storage that holds the resulting combined value after executing the combiner. As the initializer-expr value of a user-defined reduction is not known a priori the initializer-clause can be used to specify one. Then the contents of the initializer-clause will be used as the initializer for private copies of reduction list items where the omp_priv identifier will refer to the storage to be initialized. The special identifier omp_orig can also appear in the initializer-clause and it will refer to the storage of the original variable to be reduced. Differential Revision: http://reviews.llvm.org/D11182 llvm-svn: 262582
70 lines
2.4 KiB
C++
70 lines
2.4 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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// expected-no-diagnostics
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#ifndef HEADER
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#define HEADER
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#pragma omp declare reduction(+ : int, char : omp_out *= omp_in)
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// CHECK: #pragma omp declare reduction (+ : int : omp_out *= omp_in)
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// CHECK-NEXT: #pragma omp declare reduction (+ : char : omp_out *= omp_in)
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// CHECK: #pragma omp declare reduction (fun : int : omp_out += omp_in) initializer(omp_priv = omp_orig + 15)
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template <class T>
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class SSS {
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public:
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#pragma omp declare reduction(fun : T : omp_out += omp_in) initializer(omp_priv = omp_orig + 15)
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// CHECK: #pragma omp declare reduction (fun : T : omp_out += omp_in) initializer(omp_priv = omp_orig + 15)
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};
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SSS<int> d;
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void init(SSS<int> &lhs, SSS<int> rhs);
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#pragma omp declare reduction(fun : SSS < int > : omp_out = omp_in) initializer(init(omp_priv, omp_orig))
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// CHECK: #pragma omp declare reduction (fun : SSS<int> : omp_out = omp_in) initializer(init(omp_priv, omp_orig))
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// CHECK: template <typename T = int> int foo(int a) {
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// CHECK: #pragma omp declare reduction (fun : int : omp_out += omp_in) initializer(omp_priv = omp_orig + 15);
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// CHECK: {
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// CHECK: #pragma omp declare reduction (fun : int : omp_out += omp_in) initializer(omp_priv = omp_orig + 15);
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// CHECK: }
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// CHECK: return a;
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// CHECK: }
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// CHECK: template <typename T> T foo(T a) {
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// CHECK: #pragma omp declare reduction (fun : T : omp_out += omp_in) initializer(omp_priv = omp_orig + 15);
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// CHECK: {
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// CHECK: #pragma omp declare reduction (fun : T : omp_out += omp_in) initializer(omp_priv = omp_orig + 15);
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// CHECK: }
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// CHECK: return a;
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// CHECK: }
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template <typename T>
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T foo(T a) {
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#pragma omp declare reduction(fun : T : omp_out += omp_in) initializer(omp_priv = omp_orig + 15)
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{
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#pragma omp declare reduction(fun : T : omp_out += omp_in) initializer(omp_priv = omp_orig + 15)
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}
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return a;
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}
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int main() {
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int i = 0;
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SSS<int> sss;
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// TODO: Add support for scoped reduction identifiers
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// #pragma omp parallel reduction(SSS<int>::fun : i)
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// TODO-CHECK: #pragma omp parallel reduction(SSS<int>::fun: i)
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{
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i += 1;
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}
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// #pragma omp parallel reduction(::fun:sss)
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// TODO-CHECK: #pragma omp parallel reduction(::fun: sss)
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{
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}
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return foo(15);
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}
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#endif
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