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.
336 lines
11 KiB
C++
336 lines
11 KiB
C++
// RUN: %clang_cc1 %s -fopenacc -verify
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struct S{};
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struct Converts{
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operator int();
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};
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template<typename T, unsigned Zero, unsigned Two, unsigned Four>
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void ParallelOrOrphanTempl() {
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T i;
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// expected-error@+1{{'num' argument on 'gang' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop gang(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{'num' argument on 'gang' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop gang(num:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'gang' 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 gang(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'gang' 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 gang(num:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{argument to 'gang' clause dimension must be a constant expression}}
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#pragma acc loop gang(dim:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{argument to 'gang' clause dimension must be a constant expression}}
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#pragma acc parallel
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#pragma acc loop gang(dim:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 0}}
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#pragma acc loop gang(dim:Zero)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 0}}
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#pragma acc parallel
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#pragma acc loop gang(dim:Zero)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 4}}
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#pragma acc loop gang(dim:Four)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 4}}
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#pragma acc parallel
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#pragma acc loop gang(dim:Four)
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for(int i = 0; i < 5; ++i);
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#pragma acc loop gang(static:i) gang(dim:Two)
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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 gang(dim:Two) gang(static:*)
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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 gang(dim:Two, static:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+4{{OpenACC 'gang' clause may have at most one 'static' argument}}
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// expected-note@+3{{previous expression is here}}
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// expected-error@+2{{OpenACC 'gang' clause may have at most one 'dim' argument}}
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// expected-note@+1{{previous expression is here}}
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#pragma acc loop gang(static:i, static:i, dim:Two, dim:1)
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for(int i = 0; i < 5; ++i);
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}
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void ParallelOrOrphan() {
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ParallelOrOrphanTempl<int, 0, 2, 4>(); // expected-note{{in instantiation of function template}}
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int i;
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// expected-error@+1{{'num' argument on 'gang' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop gang(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{'num' argument on 'gang' clause is not permitted on an orphaned 'loop' construct}}
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#pragma acc loop gang(num:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'gang' 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 gang(i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'gang' 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 gang(num:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{argument to 'gang' clause dimension must be a constant expression}}
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#pragma acc loop gang(dim:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{argument to 'gang' clause dimension must be a constant expression}}
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#pragma acc parallel
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#pragma acc loop gang(dim:i)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 0}}
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#pragma acc loop gang(dim:0)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 0}}
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#pragma acc parallel
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#pragma acc loop gang(dim:0)
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for(int i = 0; i < 5; ++i);
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// expected-error@+1{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 4}}
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#pragma acc loop gang(dim:4)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{argument to 'gang' clause dimension must be 1, 2, or 3: evaluated to 4}}
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#pragma acc parallel
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#pragma acc loop gang(dim:4)
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for(int i = 0; i < 5; ++i);
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#pragma acc loop gang(static:i) gang(dim:2)
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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 gang(dim:2) gang(static:i)
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for(int i = 0; i < 5; ++i);
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S s;
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// expected-error@+2{{OpenACC clause 'gang' requires expression of integer type ('S' invalid)}}
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#pragma acc parallel
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#pragma acc loop gang(dim:2) gang(static:s)
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for(int i = 0; i < 5; ++i);
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Converts C;
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#pragma acc parallel
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#pragma acc loop gang(dim:2) gang(static:C)
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for(int i = 0; i < 5; ++i);
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}
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template<typename SomeS, typename SomeC, typename Int>
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void StaticIsIntegralTempl() {
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SomeS s;
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// expected-error@+2{{OpenACC clause 'gang' requires expression of integer type ('S' invalid)}}
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#pragma acc parallel
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#pragma acc loop gang(dim:2) gang(static:s)
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for(int i = 0; i < 5; ++i);
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SomeC C;
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#pragma acc parallel
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#pragma acc loop gang(dim:2) gang(static:C)
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for(int i = 0; i < 5; ++i);
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Int i;
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#pragma acc parallel
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#pragma acc loop gang(dim:2) gang(static:i)
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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 gang(dim:2) gang(static:*)
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for(int i = 0; i < 5; ++i);
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}
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void StaticIsIntegral() {
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StaticIsIntegralTempl<S, Converts, int>();// expected-note{{in instantiation of function template}}
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S s;
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// expected-error@+2{{OpenACC clause 'gang' requires expression of integer type ('S' invalid)}}
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#pragma acc parallel
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#pragma acc loop gang(dim:2) gang(static:s)
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for(int i = 0; i < 5; ++i);
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Converts C;
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#pragma acc parallel
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#pragma acc loop gang(dim:2) gang(static:C)
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for(int i = 0; i < 5; ++i);
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}
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template<unsigned I>
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void SerialTempl() {
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// expected-error@+2{{'num' argument on 'gang' 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 gang(I)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'gang' 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 gang(num:I)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'dim' argument on 'gang' 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 gang(dim: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 gang(static:I)
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for(int i = 0; i < 5; ++i);
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}
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void Serial() {
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SerialTempl<2>();
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// expected-error@+2{{'num' argument on 'gang' 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 gang(1)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'num' argument on 'gang' 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 gang(num:1)
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for(int i = 0; i < 5; ++i);
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// expected-error@+2{{'dim' argument on 'gang' 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 gang(dim:1)
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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 gang(static:1)
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for(int i = 0; i < 5; ++i);
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int i;
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#pragma acc serial
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#pragma acc loop gang(static:i)
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for(int i = 0; i < 5; ++i);
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}
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template<typename T>
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void KernelsTempl() {
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T t;
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// expected-error@+2{{'dim' argument on 'gang' clause is not permitted on a 'loop' construct associated with a 'kernels' compute construct}}
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#pragma acc kernels
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#pragma acc loop gang(dim:t)
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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 gang(static:t)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{'num' argument to 'gang' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'num_gangs' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels num_gangs(t)
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#pragma acc loop gang(t)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{'num' argument to 'gang' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'num_gangs' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels num_gangs(t)
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#pragma acc loop gang(num:t)
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for(int i = 0; i < 5; ++i);
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}
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void Kernels() {
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KernelsTempl<unsigned>();
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// expected-error@+2{{'dim' argument on 'gang' clause is not permitted on a 'loop' construct associated with a 'kernels' compute construct}}
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#pragma acc kernels
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#pragma acc loop gang(dim:1)
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for(int i = 0; i < 5; ++i);
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unsigned t;
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#pragma acc kernels
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#pragma acc loop gang(static:t)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{'num' argument to 'gang' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'num_gangs' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels num_gangs(1)
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#pragma acc loop gang(1)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{'num' argument to 'gang' clause not allowed on a 'loop' construct associated with a 'kernels' construct that has a 'num_gangs' clause}}
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// expected-note@+1{{previous clause is here}}
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#pragma acc kernels num_gangs(1)
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#pragma acc loop gang(num:1)
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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 gang(num:1)
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for(int j = 0; j < 5; ++j) {
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// expected-error@+2{{loop with a 'gang' clause may not exist in the region of a 'gang' clause on a 'kernels' compute construct}}
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// expected-note@-3{{previous clause is here}}
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#pragma acc loop gang(static:1)
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for(int i = 0; i < 5; ++i);
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}
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#pragma acc kernels
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#pragma acc loop gang(num:1)
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for(int j = 0; j < 5; ++j) {
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// allowed, intervening compute construct
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#pragma acc serial
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#pragma acc loop gang(static:1)
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for(int i = 0; i < 5; ++i);
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}
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#pragma acc kernels
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#pragma acc loop gang(num:1)
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for(int i = 0; i < 5; ++i);
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// OK, on a different 'loop', not in the assoc statement.
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#pragma acc loop gang(static:1)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{OpenACC 'gang' clause may have at most one unnamed or 'num' argument}}
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// expected-note@+2{{previous expression is here}}
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#pragma acc kernels
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#pragma acc loop gang(5, num:1)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{OpenACC 'gang' clause may have at most one unnamed or 'num' argument}}
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// expected-note@+2{{previous expression is here}}
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#pragma acc kernels
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#pragma acc loop gang(num:5, 1)
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for(int i = 0; i < 5; ++i);
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// expected-error@+3{{OpenACC 'gang' clause may have at most one unnamed or 'num' argument}}
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// expected-note@+2{{previous expression is here}}
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#pragma acc kernels
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#pragma acc loop gang(num:5, num:1)
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for(int i = 0; i < 5; ++i);
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}
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void MaxOneEntry() {
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// expected-error@+3{{OpenACC 'gang' clause may have at most one 'static' argument}}
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// expected-note@+2{{previous expression is here}}
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#pragma acc kernels
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#pragma acc loop gang(static: 1, static:1)
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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 gang gang(static:1)
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for(int i = 0; i < 5; ++i);
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}
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