[flang][openacc] Lower gang, vector, worker, seq and nohost for acc routine

[clementval]

Summary

Lower clauses to the routine info op.

[clementval]

Remove blank line

[razvanlupusoru]

Looks great! So then the only one remaining is the bind name.

[clementval]

rebase

flang/lib/Lower/OpenACC.cpp

genACC(Fortran::lower::AbstractConverter &converter,
   fir::FirOpBuilder &builder = converter.getFirOpBuilder();
   mlir::Location loc = converter.genLocation(routineConstruct.source);
   std::optional<Fortran::parser::Name> name =
       std::get<std::optional<Fortran::parser::Name>>(routineConstruct.t);
   const auto &clauses =
       std::get<Fortran::parser::AccClauseList>(routineConstruct.t);
   if (name)
     TODO(loc, "acc routine with name");
-  if (!clauses.v.empty())
-    TODO(loc, "acc routine with clauses");
 
   mlir::func::FuncOp func = builder.getFunction();
   mlir::ModuleOp mod = builder.getModule();
   mlir::OpBuilder modBuilder(mod.getBodyRegion());
   std::stringstream routineOpName;
   routineOpName << accRoutinePrefix.str() << routineCounter++;
-  modBuilder.create<mlir::acc::RoutineOp>(
+  auto routineOp = modBuilder.create<mlir::acc::RoutineOp>(
       loc, routineOpName.str(), func.getName(), mlir::StringAttr{},
       mlir::UnitAttr{}, mlir::UnitAttr{}, mlir::UnitAttr{}, mlir::UnitAttr{},
       mlir::UnitAttr{}, mlir::UnitAttr{}, mlir::IntegerAttr{});
+
+  for (const Fortran::parser::AccClause &clause : clauses.v) {
+    if (std::get_if<Fortran::parser::AccClause::Seq>(&clause.u)) {
+      routineOp.setSeqAttr(builder.getUnitAttr());
+    } else if (const auto *gangClause =
+                   std::get_if<Fortran::parser::AccClause::Gang>(&clause.u)) {
+      routineOp.setGangAttr(builder.getUnitAttr());
+      if (gangClause->v) {
+        const Fortran::parser::AccGangArgList &x = *gangClause->v;
+        for (const Fortran::parser::AccGangArg &gangArg : x.v) {
+          if (const auto *dim =
+                  std::get_if<Fortran::parser::AccGangArg::Dim>(&gangArg.u)) {
+            const std::optional<int64_t> dimValue = Fortran::evaluate::ToInt64(
+                *Fortran::semantics::GetExpr(dim->v));
+            if (!dimValue)
+              mlir::emitError(loc,
+                              "dim value must be a constant positive integer");
+            routineOp.setGangDimAttr(
+                builder.getIntegerAttr(builder.getIntegerType(32), *dimValue));
+          }
+        }
+      }
+    } else if (std::get_if<Fortran::parser::AccClause::Vector>(&clause.u)) {
+      routineOp.setVectorAttr(builder.getUnitAttr());
+    } else if (std::get_if<Fortran::parser::AccClause::Worker>(&clause.u)) {
+      routineOp.setWorkerAttr(builder.getUnitAttr());
+    } else if (std::get_if<Fortran::parser::AccClause::Nohost>(&clause.u)) {
+      routineOp.setNohostAttr(builder.getUnitAttr());
+    }
+  }
 }
 
 void Fortran::lower::genOpenACCConstruct(
     Fortran::lower::AbstractConverter &converter,
     Fortran::semantics::SemanticsContext &semanticsContext,
     Fortran::lower::pft::Evaluation &eval,
     const Fortran::parser::OpenACCConstruct &accConstruct) {
 

flang/test/Lower/OpenACC/acc-routine.f90

 ! This test checks lowering of OpenACC routine directive.
 
 ! RUN: bbc -fopenacc -emit-fir %s -o - | FileCheck %s
 
+! CHECK: acc.routine @acc_routine_6 func(@_QPacc_routine7) gang(dim = 1 : i32)
+! CHECK: acc.routine @acc_routine_5 func(@_QPacc_routine6) nohost
+! CHECK: acc.routine @acc_routine_4 func(@_QPacc_routine5) worker
+! CHECK: acc.routine @acc_routine_3 func(@_QPacc_routine4) vector
+! CHECK: acc.routine @acc_routine_2 func(@_QPacc_routine3) gang
+! CHECK: acc.routine @acc_routine_1 func(@_QPacc_routine2) seq
+! CHECK: acc.routine @acc_routine_0 func(@_QPacc_routine1)
+
 subroutine acc_routine1()
   !$acc routine
 end subroutine
 
-! CHECK: acc.routine @acc_routine_0 func(@_QPacc_routine1)
 ! CHECK-LABEL: func.func @_QPacc_routine1()
+
+subroutine acc_routine2()
+  !$acc routine seq
+end subroutine
+
+! CHECK-LABEL: func.func @_QPacc_routine2()
+
+subroutine acc_routine3()
+  !$acc routine gang
+end subroutine
+
+! CHECK-LABEL: func.func @_QPacc_routine3()
+
+subroutine acc_routine4()
+  !$acc routine vector
+end subroutine
+
+! CHECK-LABEL: func.func @_QPacc_routine4()
+
+subroutine acc_routine5()
+  !$acc routine worker
+end subroutine
+
+! CHECK-LABEL: func.func @_QPacc_routine5()
+
+subroutine acc_routine6()
+  !$acc routine nohost
+end subroutine
+
+! CHECK-LABEL: func.func @_QPacc_routine6()
+
+subroutine acc_routine7()
+  !$acc routine gang(dim:1)
+end subroutine
+
+! CHECK-LABEL: func.func @_QPacc_routine7()