[flang-commits] [flang] [flang][OpenMP] Fix construct privatization in default clause (PR #72510)
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flang-commits at lists.llvm.org
Wed Mar 27 23:53:38 PDT 2024
https://github.com/NimishMishra updated https://github.com/llvm/llvm-project/pull/72510
>From 9153b0a86d77033ca006c4908dee35b2cb71ff31 Mon Sep 17 00:00:00 2001
From: nimishra <nimishra at amd.com>
Date: Thu, 28 Mar 2024 12:15:34 +0530
Subject: [PATCH] [flang][OpenMP] Fix construct privatization in default clause
Change-Id: I4ce23a31336daf2fd54df925649bc0f85f246227
---
flang/include/flang/Lower/AbstractConverter.h | 7 ++-
flang/lib/Lower/Bridge.cpp | 2 +-
.../lib/Lower/OpenMP/DataSharingProcessor.cpp | 39 +++++++++----
flang/lib/Lower/OpenMP/DataSharingProcessor.h | 6 +-
.../test/Lower/OpenMP/FIR/default-clause.f90 | 5 +-
.../Lower/OpenMP/default-clause-byref.f90 | 8 ++-
flang/test/Lower/OpenMP/default-clause.f90 | 58 +++++++++++++++++--
7 files changed, 101 insertions(+), 24 deletions(-)
diff --git a/flang/include/flang/Lower/AbstractConverter.h b/flang/include/flang/Lower/AbstractConverter.h
index 32e7a5e2b04061..8fe44aaccc6111 100644
--- a/flang/include/flang/Lower/AbstractConverter.h
+++ b/flang/include/flang/Lower/AbstractConverter.h
@@ -130,9 +130,12 @@ class AbstractConverter {
virtual bool isPresentShallowLookup(Fortran::semantics::Symbol &sym) = 0;
/// Collect the set of symbols with \p flag in \p eval
- /// region if \p collectSymbols is true. Likewise, collect the
+ /// region if \p collectSymbols is true. Otherwise, collect the
/// set of the host symbols with \p flag of the associated symbols in \p eval
- /// region if collectHostAssociatedSymbols is true.
+ /// region if collectHostAssociatedSymbols is true. This allows gathering
+ /// host association details of symbols particularly in nested directives
+ /// irrespective of \p flag \p, and can be useful where host
+ /// association details are needed in flag-agnostic manner.
virtual void collectSymbolSet(
pft::Evaluation &eval,
llvm::SetVector<const Fortran::semantics::Symbol *> &symbolSet,
diff --git a/flang/lib/Lower/Bridge.cpp b/flang/lib/Lower/Bridge.cpp
index 48830dc55578c2..c11c50563b3189 100644
--- a/flang/lib/Lower/Bridge.cpp
+++ b/flang/lib/Lower/Bridge.cpp
@@ -814,7 +814,7 @@ class FirConverter : public Fortran::lower::AbstractConverter {
bool collectSymbol) {
if (collectSymbol && oriSymbol.test(flag))
symbolSet.insert(&oriSymbol);
- if (checkHostAssociatedSymbols)
+ else if (checkHostAssociatedSymbols)
if (const auto *details{
oriSymbol
.detailsIf<Fortran::semantics::HostAssocDetails>()})
diff --git a/flang/lib/Lower/OpenMP/DataSharingProcessor.cpp b/flang/lib/Lower/OpenMP/DataSharingProcessor.cpp
index e1aa7524e930d6..e79092cf45fd31 100644
--- a/flang/lib/Lower/OpenMP/DataSharingProcessor.cpp
+++ b/flang/lib/Lower/OpenMP/DataSharingProcessor.cpp
@@ -268,21 +268,39 @@ void DataSharingProcessor::insertLastPrivateCompare(mlir::Operation *op) {
firOpBuilder.restoreInsertionPoint(localInsPt);
}
+void DataSharingProcessor::collectSymbolsInNestedRegions(
+ Fortran::lower::pft::Evaluation &eval,
+ Fortran::semantics::Symbol::Flag flag,
+ llvm::SetVector<const Fortran::semantics::Symbol *>
+ &symbolsInNestedRegions) {
+ for (Fortran::lower::pft::Evaluation &nestedEval :
+ eval.getNestedEvaluations()) {
+ if (nestedEval.hasNestedEvaluations()) {
+ if (nestedEval.isConstruct())
+ // Recursively look for OpenMP constructs within `nestedEval`'s region
+ collectSymbolsInNestedRegions(nestedEval, flag, symbolsInNestedRegions);
+ else
+ converter.collectSymbolSet(nestedEval, symbolsInNestedRegions, flag,
+ /*collectSymbols=*/true,
+ /*collectHostAssociatedSymbols=*/false);
+ }
+ }
+}
+
+// Collect symbols to be default privatized in two steps.
+// In step 1, collect all symbols in `eval` that match `flag`
+// into `defaultSymbols`.
+// In step 2, for nested constructs (if any), if and only if
+// the nested construct is an OpenMP construct, collect those nested
+// symbols skipping host assicauted symbols into `symbolsInNestedRegions`.
+// Finally, in current context, lower all symbols in the set
+// `defaultSymbols` - `symbolsInNestedRegions`.
void DataSharingProcessor::collectSymbols(
Fortran::semantics::Symbol::Flag flag) {
converter.collectSymbolSet(eval, defaultSymbols, flag,
/*collectSymbols=*/true,
/*collectHostAssociatedSymbols=*/true);
- for (Fortran::lower::pft::Evaluation &e : eval.getNestedEvaluations()) {
- if (e.hasNestedEvaluations())
- converter.collectSymbolSet(e, symbolsInNestedRegions, flag,
- /*collectSymbols=*/true,
- /*collectHostAssociatedSymbols=*/false);
- else
- converter.collectSymbolSet(e, symbolsInParentRegions, flag,
- /*collectSymbols=*/false,
- /*collectHostAssociatedSymbols=*/true);
- }
+ collectSymbolsInNestedRegions(eval, flag, symbolsInNestedRegions);
}
void DataSharingProcessor::collectDefaultSymbols() {
@@ -327,7 +345,6 @@ void DataSharingProcessor::defaultPrivatize() {
!sym->GetUltimate().has<Fortran::semantics::DerivedTypeDetails>() &&
!sym->GetUltimate().has<Fortran::semantics::NamelistDetails>() &&
!symbolsInNestedRegions.contains(sym) &&
- !symbolsInParentRegions.contains(sym) &&
!privatizedSymbols.contains(sym))
doPrivatize(sym);
}
diff --git a/flang/lib/Lower/OpenMP/DataSharingProcessor.h b/flang/lib/Lower/OpenMP/DataSharingProcessor.h
index 226abe96705e35..e30a40fc76ebd0 100644
--- a/flang/lib/Lower/OpenMP/DataSharingProcessor.h
+++ b/flang/lib/Lower/OpenMP/DataSharingProcessor.h
@@ -50,7 +50,6 @@ class DataSharingProcessor {
llvm::SetVector<const Fortran::semantics::Symbol *> privatizedSymbols;
llvm::SetVector<const Fortran::semantics::Symbol *> defaultSymbols;
llvm::SetVector<const Fortran::semantics::Symbol *> symbolsInNestedRegions;
- llvm::SetVector<const Fortran::semantics::Symbol *> symbolsInParentRegions;
Fortran::lower::AbstractConverter &converter;
fir::FirOpBuilder &firOpBuilder;
omp::List<omp::Clause> clauses;
@@ -61,6 +60,11 @@ class DataSharingProcessor {
bool needBarrier();
void collectSymbols(Fortran::semantics::Symbol::Flag flag);
+ void collectSymbolsInNestedRegions(
+ Fortran::lower::pft::Evaluation &eval,
+ Fortran::semantics::Symbol::Flag flag,
+ llvm::SetVector<const Fortran::semantics::Symbol *>
+ &symbolsInNestedRegions);
void collectOmpObjectListSymbol(
const omp::ObjectList &objects,
llvm::SetVector<const Fortran::semantics::Symbol *> &symbolSet);
diff --git a/flang/test/Lower/OpenMP/FIR/default-clause.f90 b/flang/test/Lower/OpenMP/FIR/default-clause.f90
index 14c0d375896a1a..88e5b9d7c73802 100644
--- a/flang/test/Lower/OpenMP/FIR/default-clause.f90
+++ b/flang/test/Lower/OpenMP/FIR/default-clause.f90
@@ -193,7 +193,6 @@ subroutine nested_default_clause_tests
!CHECK: %[[PRIVATE_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFnested_default_clause_testsEx"}
!CHECK: %[[PRIVATE_Y:.*]] = fir.alloca i32 {bindc_name = "y", pinned, uniq_name = "_QFnested_default_clause_testsEy"}
!CHECK: %[[PRIVATE_Z:.*]] = fir.alloca i32 {bindc_name = "z", pinned, uniq_name = "_QFnested_default_clause_testsEz"}
-!CHECK: %[[PRIVATE_W:.*]] = fir.alloca i32 {bindc_name = "w", pinned, uniq_name = "_QFnested_default_clause_testsEw"}
!CHECK: omp.parallel {
!CHECK: %[[PRIVATE_INNER_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFnested_default_clause_testsEx"}
!CHECK: %[[temp:.*]] = fir.load %[[PRIVATE_X]] : !fir.ref<i32>
@@ -206,10 +205,12 @@ subroutine nested_default_clause_tests
!CHECK: omp.terminator
!CHECK: }
!CHECK: omp.parallel {
+!CHECK: %[[PRIVATE_INNER_Z:.*]] = fir.alloca i32 {bindc_name = "z", pinned, uniq_name =
+!"_QFnested_default_clause_testsEz"}
!CHECK: %[[PRIVATE_INNER_W:.*]] = fir.alloca i32 {bindc_name = "w", pinned, uniq_name = "_QFnested_default_clause_testsEw"}
!CHECK: %[[PRIVATE_INNER_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFnested_default_clause_testsEx"}
!CHECK: %[[temp_1:.*]] = fir.load %[[PRIVATE_INNER_X]] : !fir.ref<i32>
-!CHECK: %[[temp_2:.*]] = fir.load %[[PRIVATE_Z]] : !fir.ref<i32>
+!CHECK: %[[temp_2:.*]] = fir.load %[[PRIVATE_INNER_Z]] : !fir.ref<i32>
!CHECK: %[[result:.*]] = arith.addi %{{.*}}, %{{.*}} : i32
!CHECK: fir.store %[[result]] to %[[PRIVATE_INNER_W]] : !fir.ref<i32>
!CHECK: omp.terminator
diff --git a/flang/test/Lower/OpenMP/default-clause-byref.f90 b/flang/test/Lower/OpenMP/default-clause-byref.f90
index 1167ba7e6ae0d4..a657d1aa62ccdf 100644
--- a/flang/test/Lower/OpenMP/default-clause-byref.f90
+++ b/flang/test/Lower/OpenMP/default-clause-byref.f90
@@ -226,8 +226,6 @@ subroutine nested_default_clause_tests
!CHECK: %[[PRIVATE_Y_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_Y]] {uniq_name = "_QFnested_default_clause_testsEy"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[PRIVATE_Z:.*]] = fir.alloca i32 {bindc_name = "z", pinned, uniq_name = "_QFnested_default_clause_testsEz"}
!CHECK: %[[PRIVATE_Z_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_Z]] {uniq_name = "_QFnested_default_clause_testsEz"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
-!CHECK: %[[PRIVATE_W:.*]] = fir.alloca i32 {bindc_name = "w", pinned, uniq_name = "_QFnested_default_clause_testsEw"}
-!CHECK: %[[PRIVATE_W_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_W]] {uniq_name = "_QFnested_default_clause_testsEw"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: omp.parallel {
!CHECK: %[[PRIVATE_INNER_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFnested_default_clause_testsEx"}
!CHECK: %[[PRIVATE_INNER_X_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_X]] {uniq_name = "_QFnested_default_clause_testsEx"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
@@ -242,12 +240,16 @@ subroutine nested_default_clause_tests
!CHECK: omp.terminator
!CHECK: }
!CHECK: omp.parallel {
+!CHECK: %[[PRIVATE_INNER_Z:.*]] = fir.alloca i32 {bindc_name = "z", pinned, uniq_name =
+!"_QFnested_default_clause_testsEz"}
+!CHECK: %[[PRIVATE_INNER_Z_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_Z]] {uniq_name =
+!"_QFnested_default_clause_testsEz"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[PRIVATE_INNER_W:.*]] = fir.alloca i32 {bindc_name = "w", pinned, uniq_name = "_QFnested_default_clause_testsEw"}
!CHECK: %[[PRIVATE_INNER_W_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_W]] {uniq_name = "_QFnested_default_clause_testsEw"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[PRIVATE_INNER_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFnested_default_clause_testsEx"}
!CHECK: %[[PRIVATE_INNER_X_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_X]] {uniq_name = "_QFnested_default_clause_testsEx"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[TEMP_1:.*]] = fir.load %[[PRIVATE_INNER_X_DECL]]#0 : !fir.ref<i32>
-!CHECK: %[[TEMP_2:.*]] = fir.load %[[PRIVATE_Z_DECL]]#0 : !fir.ref<i32>
+!CHECK: %[[TEMP_2:.*]] = fir.load %[[PRIVATE_INNER_Z_DECL]]#0 : !fir.ref<i32>
!CHECK: %[[RESULT:.*]] = arith.addi %{{.*}}, %{{.*}} : i32
!CHECK: hlfir.assign %[[RESULT]] to %[[PRIVATE_INNER_W_DECL]]#0 : i32, !fir.ref<i32>
!CHECK: omp.terminator
diff --git a/flang/test/Lower/OpenMP/default-clause.f90 b/flang/test/Lower/OpenMP/default-clause.f90
index f86b51aef4e026..9f5d612eb90ef8 100644
--- a/flang/test/Lower/OpenMP/default-clause.f90
+++ b/flang/test/Lower/OpenMP/default-clause.f90
@@ -149,7 +149,7 @@ program default_clause_lowering
end program default_clause_lowering
subroutine nested_default_clause_tests
- integer :: x, y, z, w, k, a
+ integer :: x, y, z, w, k
!CHECK: %[[K:.*]] = fir.alloca i32 {bindc_name = "k", uniq_name = "_QFnested_default_clause_testsEk"}
!CHECK: %[[K_DECL:.*]]:2 = hlfir.declare %[[K]] {uniq_name = "_QFnested_default_clause_testsEk"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[W:.*]] = fir.alloca i32 {bindc_name = "w", uniq_name = "_QFnested_default_clause_testsEw"}
@@ -221,13 +221,13 @@ subroutine nested_default_clause_tests
!CHECK: omp.parallel {
+!CHECK: %[[PRIVATE_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name =
+!"_QFnested_default_clause_testsEx"}
!CHECK: %[[PRIVATE_X_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_X]] {uniq_name = "_QFnested_default_clause_testsEx"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[PRIVATE_Y:.*]] = fir.alloca i32 {bindc_name = "y", pinned, uniq_name = "_QFnested_default_clause_testsEy"}
!CHECK: %[[PRIVATE_Y_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_Y]] {uniq_name = "_QFnested_default_clause_testsEy"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[PRIVATE_Z:.*]] = fir.alloca i32 {bindc_name = "z", pinned, uniq_name = "_QFnested_default_clause_testsEz"}
!CHECK: %[[PRIVATE_Z_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_Z]] {uniq_name = "_QFnested_default_clause_testsEz"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
-!CHECK: %[[PRIVATE_W:.*]] = fir.alloca i32 {bindc_name = "w", pinned, uniq_name = "_QFnested_default_clause_testsEw"}
-!CHECK: %[[PRIVATE_W_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_W]] {uniq_name = "_QFnested_default_clause_testsEw"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: omp.parallel {
!CHECK: %[[PRIVATE_INNER_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFnested_default_clause_testsEx"}
!CHECK: %[[PRIVATE_INNER_X_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_X]] {uniq_name = "_QFnested_default_clause_testsEx"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
@@ -242,12 +242,16 @@ subroutine nested_default_clause_tests
!CHECK: omp.terminator
!CHECK: }
!CHECK: omp.parallel {
+!CHECK: %[[PRIVATE_INNER_Z:.*]] = fir.alloca i32 {bindc_name = "z", pinned, uniq_name =
+!"_QFnested_default_clause_testsEz"}
+!CHECK: %[[PRIVATE_INNER_Z_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_Z]] {uniq_name =
+!"_QFnested_default_clause_testsEz"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[PRIVATE_INNER_W:.*]] = fir.alloca i32 {bindc_name = "w", pinned, uniq_name = "_QFnested_default_clause_testsEw"}
!CHECK: %[[PRIVATE_INNER_W_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_W]] {uniq_name = "_QFnested_default_clause_testsEw"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[PRIVATE_INNER_X:.*]] = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFnested_default_clause_testsEx"}
!CHECK: %[[PRIVATE_INNER_X_DECL:.*]]:2 = hlfir.declare %[[PRIVATE_INNER_X]] {uniq_name = "_QFnested_default_clause_testsEx"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
!CHECK: %[[TEMP_1:.*]] = fir.load %[[PRIVATE_INNER_X_DECL]]#0 : !fir.ref<i32>
-!CHECK: %[[TEMP_2:.*]] = fir.load %[[PRIVATE_Z_DECL]]#0 : !fir.ref<i32>
+!CHECK: %[[TEMP_2:.*]] = fir.load %[[PRIVATE_INNER_Z_DECL]]#0 : !fir.ref<i32>
!CHECK: %[[RESULT:.*]] = arith.addi %{{.*}}, %{{.*}} : i32
!CHECK: hlfir.assign %[[RESULT]] to %[[PRIVATE_INNER_W_DECL]]#0 : i32, !fir.ref<i32>
!CHECK: omp.terminator
@@ -383,3 +387,49 @@ subroutine skipped_default_clause_checks()
iii=it(11)
!$omp end parallel
end subroutine
+
+subroutine nested_constructs
+!CHECK: %[[I:.*]] = fir.alloca i32 {bindc_name = "i", uniq_name = "_QFnested_constructsEi"}
+!CHECK: %[[I_DECL:.*]]:2 = hlfir.declare %[[I]] {{.*}}
+!CHECK: %[[J:.*]] = fir.alloca i32 {bindc_name = "j", uniq_name = "_QFnested_constructsEj"}
+!CHECK: %[[J_DECL:.*]]:2 = hlfir.declare %[[J]] {{.*}}
+!CHECK: %[[Y:.*]] = fir.alloca i32 {bindc_name = "y", uniq_name = "_QFnested_constructsEy"}
+!CHECK: %[[Y_DECL:.*]]:2 = hlfir.declare %[[Y]] {{.*}}
+!CHECK: %[[Z:.*]] = fir.alloca i32 {bindc_name = "z", uniq_name = "_QFnested_constructsEz"}
+!CHECK: %[[Z_DECL:.*]]:2 = hlfir.declare %[[Z]] {{.*}}
+
+ integer :: y, z
+!CHECK: omp.parallel {
+!CHECK: %[[INNER_J:.*]] = fir.alloca i32 {bindc_name = "j", pinned}
+!CHECK: %[[INNER_J_DECL:.*]]:2 = hlfir.declare %[[INNER_J]] {{.*}}
+!CHECK: %[[INNER_I:.*]] = fir.alloca i32 {bindc_name = "i", pinned}
+!CHECK: %[[INNER_I_DECL:.*]]:2 = hlfir.declare %[[INNER_I]] {{.*}}
+!CHECK: %[[INNER_Y:.*]] = fir.alloca i32 {bindc_name = "y", pinned, uniq_name = "_QFnested_constructsEy"}
+!CHECK: %[[INNER_Y_DECL:.*]]:2 = hlfir.declare %[[INNER_Y]] {{.*}}
+!CHECK: %[[TEMP:.*]] = fir.load %[[Y_DECL]]#0 : !fir.ref<i32>
+!CHECK: hlfir.assign %[[TEMP]] to %[[INNER_Y_DECL]]#0 temporary_lhs : i32, !fir.ref<i32>
+!CHECK: %[[INNER_Z:.*]] = fir.alloca i32 {bindc_name = "z", pinned, uniq_name = "_QFnested_constructsEz"}
+!CHECK: %[[INNER_Z_DECL:.*]]:2 = hlfir.declare %[[INNER_Z]] {{.*}}
+ !$omp parallel default(private) firstprivate(y)
+!CHECK: {{.*}} = fir.do_loop {{.*}} {
+ do i = 1, 10
+!CHECK: %[[CONST_1:.*]] = arith.constant 1 : i32
+!CHECK: hlfir.assign %[[CONST_1]] to %[[INNER_Y_DECL]]#0 : i32, !fir.ref<i32>
+ y = 1
+!CHECK: {{.*}} = fir.do_loop {{.*}} {
+ do j = 1, 10
+!CHECK: %[[CONST_20:.*]] = arith.constant 20 : i32
+!CHECK: hlfir.assign %[[CONST_20]] to %[[INNER_Z_DECL]]#0 : i32, !fir.ref<i32>
+ z = 20
+!CHECK: omp.parallel {
+!CHECK: %[[NESTED_Y:.*]] = fir.alloca i32 {bindc_name = "y", pinned, uniq_name = "_QFnested_constructsEy"}
+!CHECK: %[[NESTED_Y_DECL:.*]]:2 = hlfir.declare %[[NESTED_Y]] {{.*}}
+!CHECK: %[[CONST_2:.*]] = arith.constant 2 : i32
+!CHECK: hlfir.assign %[[CONST_2]] to %[[NESTED_Y_DECL]]#0 : i32, !fir.ref<i32>
+ !$omp parallel default(private)
+ y = 2
+ !$omp end parallel
+ end do
+ end do
+ !$omp end parallel
+end subroutine
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