b0cfbfd74b
OpenACC restricts the contents of a 'for' loop affected by a 'loop' construct without a 'seq'. The loop variable must be integer, pointer, or random-access-iterator, it must monotonically increase/decrease, and the trip count must be computable at runtime before the function. This patch tries to implement some of these limitations to the best of our ability, though it causes us to be perhaps overly restrictive at the moment. I expect we'll revisit some of these rules/add additional supported forms of loop-variable and 'monotonically increasing' here, but the currently enforced rules are heavily inspired by the OMP implementation here.
137 lines
4.4 KiB
C++
137 lines
4.4 KiB
C++
// RUN: %clang_cc1 %s -fopenacc -verify
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template<typename Int, typename NotInt, typename ConvertsToInt>
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void TemplUses(Int I, NotInt NI, ConvertsToInt CTI) {
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#pragma acc loop vector(I)
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for(int j = 0; j < 5; ++j);
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#pragma acc parallel
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#pragma acc loop vector(length: I)
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for(int j = 0; j < 5; ++j);
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#pragma acc kernels
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#pragma acc loop vector(CTI)
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for(int j = 0; j < 5; ++j);
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// expected-error@+2{{OpenACC clause 'vector' requires expression of integer type ('NoConvert' invalid)}}
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#pragma acc kernels
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#pragma acc loop vector(length: NI)
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for(int j = 0; j < 5; ++j);
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// expected-error@+2{{'num' argument on 'vector' clause is not permitted on a 'loop' construct associated with a 'serial' compute construct}}
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#pragma acc serial
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#pragma acc loop vector(length: I)
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for(int j = 0; j < 5; ++j);
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// expected-error@+3{{'num' argument to 'vector' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'vector_length' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels vector_length(I)
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#pragma acc loop vector(length: CTI)
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for(int j = 0; j < 5; ++j);
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#pragma acc loop vector
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for(int i = 0; i < 5; ++i) {
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for(int j = 0; j < 5; ++j);
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// expected-error@+2{{loop with a 'vector' clause may not exist in the region of a 'vector' clause}}
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// expected-note@-4{{previous clause is here}}
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#pragma acc loop vector
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for(int j = 0; j < 5; ++j);
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for(int j = 0; j < 5; ++j);
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}
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#pragma acc loop vector
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for(int i = 0; i < 5; ++i) {
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for(int j = 0; j < 5; ++j);
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// expected-error@+4{{loop with a 'vector' clause may not exist in the region of a 'vector' clause}}
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// expected-error@+3{{loop with a 'worker' clause may not exist in the region of a 'vector' clause}}
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// expected-error@+2{{loop with a 'gang' clause may not exist in the region of a 'vector' clause}}
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// expected-note@-6 3{{previous clause is here}}
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#pragma acc loop vector, worker, gang
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for(int j = 0; j < 5; ++j);
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for(int j = 0; j < 5; ++j);
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}
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#pragma acc loop vector
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for(int i = 0; i < 5; ++i) {
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#pragma acc serial
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#pragma acc loop vector
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for(int j = 0; j < 5; ++j);
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}
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}
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struct NoConvert{};
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struct Converts{
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operator int();
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};
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void uses() {
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TemplUses(5, NoConvert{}, Converts{}); // expected-note{{in instantiation of function template specialization}}
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unsigned i;
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NoConvert NI;
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Converts CTI;
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#pragma acc loop vector(i)
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for(int j = 0; j < 5; ++j);
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#pragma acc parallel
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#pragma acc loop vector(length: i)
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for(int j = 0; j < 5; ++j);
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#pragma acc kernels
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#pragma acc loop vector(CTI)
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for(int j = 0; j < 5; ++j);
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// expected-error@+2{{OpenACC clause 'vector' requires expression of integer type ('NoConvert' invalid)}}
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#pragma acc kernels
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#pragma acc loop vector(length: NI)
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for(int j = 0; j < 5; ++j);
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// expected-error@+2{{'num' argument on 'vector' clause is not permitted on a 'loop' construct associated with a 'serial' compute construct}}
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#pragma acc serial
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#pragma acc loop vector(length: i)
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for(int j = 0; j < 5; ++j);
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// expected-error@+3{{'num' argument to 'vector' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'vector_length' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels vector_length(i)
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#pragma acc loop vector(length: i)
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for(int j = 0; j < 5; ++j);
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#pragma acc loop vector
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for(int i = 0; i < 5; ++i) {
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for(int j = 0; j < 5; ++j);
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// expected-error@+2{{loop with a 'vector' clause may not exist in the region of a 'vector' clause}}
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// expected-note@-4{{previous clause is here}}
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#pragma acc loop vector
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for(int j = 0; j < 5; ++j);
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for(int j = 0; j < 5; ++j);
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}
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#pragma acc loop vector
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for(int i = 0; i < 5; ++i) {
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#pragma acc serial
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#pragma acc loop vector
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for(int j = 0; j < 5; ++j);
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}
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#pragma acc loop vector
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for(int i = 0; i < 5; ++i) {
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for(int j = 0; j < 5; ++j);
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// expected-error@+4{{loop with a 'vector' clause may not exist in the region of a 'vector' clause}}
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// expected-error@+3{{loop with a 'worker' clause may not exist in the region of a 'vector' clause}}
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// expected-error@+2{{loop with a 'gang' clause may not exist in the region of a 'vector' clause}}
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// expected-note@-6 3{{previous clause is here}}
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#pragma acc loop vector, worker, gang
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for(int j = 0; j < 5; ++j);
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for(int j = 0; j < 5; ++j);
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}
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#pragma acc loop vector
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for(int i = 0; i < 5; ++i) {
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#pragma acc serial
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#pragma acc loop vector, worker, gang
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for(int j = 0; j < 5; ++j);
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}
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}
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