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.
203 lines
6.1 KiB
C++
203 lines
6.1 KiB
C++
// RUN: %clang_cc1 %s -fopenacc -verify
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template<unsigned I, typename NotInt, typename ConvertsToInt, typename Int>
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void TemplUses(NotInt NI, ConvertsToInt CTI, Int IsI) {
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int i;
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// expected-error@+1{{'num' argument on 'worker' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop worker(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{'num' argument on 'worker' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop worker(num:IsI)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker(i)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker(CTI)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker(IsI)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker(I)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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// expected-error@+1{{OpenACC clause 'worker' requires expression of integer type ('NoConvert' invalid)}}
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#pragma acc loop worker(NI)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker(num:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{'num' argument to 'worker' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'num_workers' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels num_workers(IsI)
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#pragma acc loop worker(num:CTI)
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for(int i = 0; i < 5; ++i);
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for(int i = 0; i < 5; ++i);
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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<3>(NoConvert{}, Converts{}, 5); // expected-note{{in instantiation of function template specialization}}
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#pragma acc loop worker
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for(int i = 0; i < 5; ++i);
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#pragma acc parallel
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#pragma acc loop worker
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for(int i = 0; i < 5; ++i);
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int i;
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// expected-error@+1{{'num' argument on 'worker' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop worker(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'worker' clause is not permitted on a 'loop' construct associated with a 'parallel' compute construct}}
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#pragma acc parallel
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#pragma acc loop worker(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{'num' argument on 'worker' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop worker(num:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'worker' clause is not permitted on a 'loop' construct associated with a 'parallel' compute construct}}
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#pragma acc parallel
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#pragma acc loop worker(num:i)
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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 worker
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'worker' 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 worker(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'worker' 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 worker(num:i)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker(i)
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for(int i = 0; i < 5; ++i);
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Converts Cvts;
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#pragma acc kernels
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#pragma acc loop worker(Cvts)
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for(int i = 0; i < 5; ++i);
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NoConvert NoCvts;
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#pragma acc kernels
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// expected-error@+1{{OpenACC clause 'worker' requires expression of integer type ('NoConvert' invalid)}}
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#pragma acc loop worker(NoCvts)
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for(int i = 0; i < 5; ++i);
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#pragma acc kernels
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#pragma acc loop worker(num:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{'num' argument to 'worker' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'num_workers' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels num_workers(i)
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#pragma acc loop worker(num:i)
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for(int i = 0; i < 5; ++i);
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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// expected-error@+3{{loop with a 'worker' clause may not exist in the region of a 'worker' clause}}
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// expected-error@+2{{loop with a 'gang' clause may not exist in the region of a 'worker' clause}}
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// expected-note@-4 2{{previous clause is here}}
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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#pragma acc parallel
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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#pragma acc parallel
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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// expected-error@+3{{loop with a 'worker' clause may not exist in the region of a 'worker' clause}}
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// expected-error@+2{{loop with a 'gang' clause may not exist in the region of a 'worker' clause}}
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// expected-note@-4 2{{previous clause is here}}
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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#pragma acc parallel
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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#pragma acc parallel
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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#pragma acc serial
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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// expected-error@+3{{loop with a 'worker' clause may not exist in the region of a 'worker' clause}}
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// expected-error@+2{{loop with a 'gang' clause may not exist in the region of a 'worker' clause}}
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// expected-note@-4 2{{previous clause is here}}
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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#pragma acc serial
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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#pragma acc parallel
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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#pragma acc kernels
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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// expected-error@+3{{loop with a 'worker' clause may not exist in the region of a 'worker' clause}}
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// expected-error@+2{{loop with a 'gang' clause may not exist in the region of a 'worker' clause}}
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// expected-note@-4 2{{previous clause is here}}
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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#pragma acc kernels
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#pragma acc loop worker
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for(int i= 0; i< 5; ++i) {
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#pragma acc parallel
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#pragma acc loop worker, gang
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for(int k = 0; k < 5; ++k);
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}
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}
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