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[flang][OpenMP] Parse AFFINITY clause, lowering not supported yet (llvm#113485)
Implement parsing of the AFFINITY clause on TASK construct, conversion from the parser class to omp::Clause. Lowering to HLFIR is unsupported, a TODO message is displayed.
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10 files changed

+129
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‎flang/include/flang/Parser/dump-parse-tree.h‎

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@@ -476,6 +476,7 @@ class ParseTreeDumper {
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NODE(parser, OldParameterStmt)
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NODE(parser, OmpIteratorSpecifier)
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NODE(parser, OmpIteratorModifier)
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NODE(parser, OmpAffinityClause)
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NODE(parser, OmpAlignedClause)
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NODE(parser, OmpAtomic)
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NODE(parser, OmpAtomicCapture)

‎flang/include/flang/Parser/parse-tree.h‎

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@@ -3458,6 +3458,13 @@ struct OmpReductionOperator {
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// --- Clauses
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// OMP 5.0 2.10.1 affinity([aff-modifier:] locator-list)
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// aff-modifier: interator-modifier
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struct OmpAffinityClause {
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TUPLE_CLASS_BOILERPLATE(OmpAffinityClause);
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std::tuple<std::optional<OmpIteratorModifier>, OmpObjectList> t;
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};
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// 2.8.1 aligned-clause -> ALIGNED (variable-name-list[ : scalar-constant])
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struct OmpAlignedClause {
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TUPLE_CLASS_BOILERPLATE(OmpAlignedClause);

‎flang/lib/Lower/OpenMP/Clauses.cpp‎

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@@ -352,8 +352,15 @@ Absent make(const parser::OmpClause::Absent &inp,
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Affinity make(const parser::OmpClause::Affinity &inp,
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semantics::SemanticsContext &semaCtx) {
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// inp -> empty
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llvm_unreachable("Empty: affinity");
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// inp.v -> parser::OmpAffinityClause
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auto &t0 = std::get<std::optional<parser::OmpIteratorModifier>>(inp.v.t);
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auto &t1 = std::get<parser::OmpObjectList>(inp.v.t);
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auto &&maybeIter =
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maybeApply([&](auto &&s) { return makeIterator(s, semaCtx); }, t0);
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return Affinity{{/*Iterator=*/std::move(maybeIter),
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/*LocatorList=*/makeObjects(t1, semaCtx)}};
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}
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Align make(const parser::OmpClause::Align &inp,

‎flang/lib/Lower/OpenMP/OpenMP.cpp‎

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@@ -2769,7 +2769,8 @@ static void genOMP(lower::AbstractConverter &converter, lower::SymMap &symTable,
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for (const Clause &clause : clauses) {
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mlir::Location clauseLocation = converter.genLocation(clause.source);
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if (!std::holds_alternative<clause::Allocate>(clause.u) &&
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if (!std::holds_alternative<clause::Affinity>(clause.u) &&
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!std::holds_alternative<clause::Allocate>(clause.u) &&
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!std::holds_alternative<clause::Copyin>(clause.u) &&
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!std::holds_alternative<clause::Copyprivate>(clause.u) &&
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!std::holds_alternative<clause::Default>(clause.u) &&

‎flang/lib/Parser/openmp-parsers.cpp‎

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@@ -177,6 +177,11 @@ TYPE_PARSER(construct<OmpIteratorSpecifier>(
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TYPE_PARSER(construct<OmpIteratorModifier>("ITERATOR" >>
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parenthesized(nonemptyList(sourced(Parser<OmpIteratorSpecifier>{})))))
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// [5.0] 2.10.1 affinity([aff-modifier:] locator-list)
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// aff-modifier: interator-modifier
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TYPE_PARSER(construct<OmpAffinityClause>(
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maybe(Parser<OmpIteratorModifier>{} / ":"), Parser<OmpObjectList>{}))
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// 2.15.3.1 DEFAULT (PRIVATE | FIRSTPRIVATE | SHARED | NONE)
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TYPE_PARSER(construct<OmpDefaultClause>(
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"PRIVATE" >> pure(OmpDefaultClause::Type::Private) ||
@@ -415,6 +420,8 @@ TYPE_PARSER(construct<OmpLastprivateClause>(
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TYPE_PARSER(
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"ACQUIRE" >> construct<OmpClause>(construct<OmpClause::Acquire>()) ||
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"ACQ_REL" >> construct<OmpClause>(construct<OmpClause::AcqRel>()) ||
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"AFFINITY" >> construct<OmpClause>(construct<OmpClause::Affinity>(
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parenthesized(Parser<OmpAffinityClause>{}))) ||
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"ALIGNED" >> construct<OmpClause>(construct<OmpClause::Aligned>(
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parenthesized(Parser<OmpAlignedClause>{}))) ||
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"ALLOCATE" >> construct<OmpClause>(construct<OmpClause::Allocate>(

‎flang/lib/Parser/unparse.cpp‎

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@@ -2129,6 +2129,10 @@ class UnparseVisitor {
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Walk(std::get<std::optional<OmpDeviceClause::DeviceModifier>>(x.t), ":");
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Walk(std::get<ScalarIntExpr>(x.t));
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}
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void Unparse(const OmpAffinityClause &x) {
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Walk(std::get<std::optional<OmpIteratorModifier>>(x.t), ":");
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Walk(std::get<OmpObjectList>(x.t));
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}
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void Unparse(const OmpAlignedClause &x) {
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Walk(std::get<OmpObjectList>(x.t));
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Put(",");

‎flang/test/Lower/OpenMP/Todo/affinity-clause.f90‎

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@@ -0,0 +1,10 @@
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!RUN: %not_todo_cmd bbc -emit-hlfir -fopenmp -fopenmp-version=50 -o - %s 2>&1 | FileCheck %s
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!RUN: %not_todo_cmd %flang_fc1 -emit-hlfir -fopenmp -fopenmp-version=50 -o - %s 2>&1 | FileCheck %s
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!CHECK: not yet implemented: Unhandled clause AFFINITY in TASK construct
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subroutine f00(x)
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integer :: x(10)
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!$omp task affinity(x)
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x = x + 1
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!$omp end task
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end

‎flang/test/Parser/OpenMP/affinity-clause.f90‎

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@@ -0,0 +1,79 @@
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!RUN: %flang_fc1 -fdebug-unparse -fopenmp -fopenmp-version=50 %s | FileCheck --ignore-case --check-prefix="UNPARSE" %s
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!RUN: %flang_fc1 -fdebug-dump-parse-tree -fopenmp -fopenmp-version=50 %s | FileCheck --check-prefix="PARSE-TREE" %s
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subroutine f00(x)
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integer :: x(10)
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!$omp task affinity(x)
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x = x + 1
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!$omp end task
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end
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!UNPARSE: SUBROUTINE f00 (x)
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!UNPARSE: INTEGER x(10_4)
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!UNPARSE: !$OMP TASK AFFINITY(x)
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!UNPARSE: x=x+1_4
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!UNPARSE: !$OMP END TASK
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!UNPARSE: END SUBROUTINE
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!PARSE-TREE: OmpBeginBlockDirective
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!PARSE-TREE: | OmpBlockDirective -> llvm::omp::Directive = task
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!PARSE-TREE: | OmpClauseList -> OmpClause -> Affinity -> OmpAffinityClause
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!PARSE-TREE: | | OmpObjectList -> OmpObject -> Designator -> DataRef -> Name = 'x'
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subroutine f01(x)
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integer :: x(10)
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!$omp task affinity(x(1), x(3))
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x = x + 1
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!$omp end task
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end
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!UNPARSE: SUBROUTINE f01 (x)
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!UNPARSE: INTEGER x(10_4)
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!UNPARSE: !$OMP TASK AFFINITY(x(1_4),x(3_4))
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!UNPARSE: x=x+1_4
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!UNPARSE: !$OMP END TASK
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!UNPARSE: END SUBROUTINE
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!PARSE-TREE: OmpBeginBlockDirective
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!PARSE-TREE: | OmpBlockDirective -> llvm::omp::Directive = task
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!PARSE-TREE: | OmpClauseList -> OmpClause -> Affinity -> OmpAffinityClause
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!PARSE-TREE: | | OmpObjectList -> OmpObject -> Designator -> DataRef -> ArrayElement
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!PARSE-TREE: | | | DataRef -> Name = 'x'
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!PARSE-TREE: | | | SectionSubscript -> Integer -> Expr = '1_4'
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!PARSE-TREE: | | | | LiteralConstant -> IntLiteralConstant = '1'
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!PARSE-TREE: | | OmpObject -> Designator -> DataRef -> ArrayElement
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!PARSE-TREE: | | | DataRef -> Name = 'x'
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!PARSE-TREE: | | | SectionSubscript -> Integer -> Expr = '3_4'
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!PARSE-TREE: | | | | LiteralConstant -> IntLiteralConstant = '3'
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subroutine f02(x)
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integer :: x(10)
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!$omp task affinity(iterator(i = 1:3): x(i))
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x = x + 1
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!$omp end task
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end
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!UNPARSE: SUBROUTINE f02 (x)
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!UNPARSE: INTEGER x(10_4)
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!UNPARSE: !$OMP TASK AFFINITY(ITERATOR(INTEGER i = 1_4:3_4):x(i))
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!UNPARSE: x=x+1_4
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!UNPARSE: !$OMP END TASK
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!UNPARSE: END SUBROUTINE
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!PARSE-TREE: OmpBeginBlockDirective
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!PARSE-TREE: | OmpBlockDirective -> llvm::omp::Directive = task
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!PARSE-TREE: | OmpClauseList -> OmpClause -> Affinity -> OmpAffinityClause
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!PARSE-TREE: | | OmpIteratorModifier -> OmpIteratorSpecifier
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!PARSE-TREE: | | | TypeDeclarationStmt
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!PARSE-TREE: | | | | DeclarationTypeSpec -> IntrinsicTypeSpec -> IntegerTypeSpec ->
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!PARSE-TREE: | | | | EntityDecl
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!PARSE-TREE: | | | | | Name = 'i'
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!PARSE-TREE: | | | SubscriptTriplet
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!PARSE-TREE: | | | | Scalar -> Integer -> Expr = '1_4'
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!PARSE-TREE: | | | | | LiteralConstant -> IntLiteralConstant = '1'
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!PARSE-TREE: | | | | Scalar -> Integer -> Expr = '3_4'
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!PARSE-TREE: | | | | | LiteralConstant -> IntLiteralConstant = '3'
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!PARSE-TREE: | | OmpObjectList -> OmpObject -> Designator -> DataRef -> ArrayElement
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!PARSE-TREE: | | | DataRef -> Name = 'x'
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!PARSE-TREE: | | | SectionSubscript -> Integer -> Expr = 'i'
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!PARSE-TREE: | | | | Designator -> DataRef -> Name = 'i'

‎flang/test/Semantics/OpenMP/affinity-clause.f90‎

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@@ -0,0 +1,9 @@
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!RUN: %python %S/../test_errors.py %s %flang -fopenmp -fopenmp-version=45
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subroutine f00(x)
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integer :: x(10)
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!ERROR: AFFINITY clause is not allowed on directive TASK in OpenMP v4.5, try -fopenmp-version=50
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!$omp task affinity(x)
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x = x + 1
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!$omp end task
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end

‎llvm/include/llvm/Frontend/OpenMP/OMP.td‎

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@@ -45,6 +45,7 @@ def OMPC_AdjustArgs : Clause<"adjust_args"> {
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}
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def OMPC_Affinity : Clause<"affinity"> {
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let clangClass = "OMPAffinityClause";
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let flangClass = "OmpAffinityClause";
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}
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def OMPC_Align : Clause<"align"> {
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let clangClass = "OMPAlignClause";

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