================
@@ -2701,7 +2701,42 @@ static void
genOMP(lower::AbstractConverter &converter, lower::SymMap &symTable,
semantics::SemanticsContext &semaCtx, lower::pft::Evaluation &eval,
const parser::OpenMPDeclareMapperConstruct &declareMapperConstruct) {
- TODO(converter.getCurrentLocation(), "OpenMPDeclareMapperConstruct");
+ fir::FirOpBuilder &firOpBuilder = converter.getFirOpBuilder();
+ lower::StatementContext stmtCtx;
+ const auto &spec =
+ std::get<parser::OmpDeclareMapperSpecifier>(declareMapperConstruct.t);
+ const auto &mapperName{std::get<std::optional<parser::Name>>(spec.t)};
+ const auto &varType{std::get<parser::TypeSpec>(spec.t)};
+ const auto &varName{std::get<parser::Name>(spec.t)};
+ assert(varType.declTypeSpec->category() ==
+ semantics::DeclTypeSpec::Category::TypeDerived &&
+ "Expected derived type");
+
+ std::string mapperNameStr;
+ if (mapperName.has_value())
+ mapperNameStr = mapperName->ToString();
+ else
+ mapperNameStr =
+ "default_" + varType.declTypeSpec->derivedTypeSpec().name().ToString();
+
+ mlir::OpBuilder::InsertPoint insPt = firOpBuilder.saveInsertionPoint();
+ firOpBuilder.setInsertionPointToStart(converter.getModuleOp().getBody());
+ auto mlirType = converter.genType(varType.declTypeSpec->derivedTypeSpec());
+ auto varVal = firOpBuilder.createTemporaryAlloc(
+ converter.getCurrentLocation(), mlirType, varName.ToString());
----------------
tblah wrote:
Unfortunately I am not very familiar with the target offload parts of OpenMP so
I might have missunderstood something here.
OpenMP 5.2 (section 5.8.8) says
> The visibility and accessibility of this declaration are the same as those of
> a variable declared at the same location in the program.
Therefore I don't think it is right to be pushing this to the module scope in
case there are conflicting mappers declared in different scopes in the same
module.
If I understand correctly, the `declare mapper` directive declares `var`:
> The variable declared by var is available for use in all map clauses on the
> directive, and no part of the variable to be mapped is mapped by default.
So it should be treated as though this parse node is a variable declaration so
`createTemporaryAlloc` would be appropriate if this is inside of a function,
but if it is not, this should probably be a `fir.global` (like if you declared
a module- or file-level variable).
https://github.com/llvm/llvm-project/pull/117046
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