https://github.com/ShashwathiNavada updated
https://github.com/llvm/llvm-project/pull/114072
>From 4b49b221a67bd77db98ca765610f7c1ace0772a0 Mon Sep 17 00:00:00 2001
From: Shashwathi N <nshas...@pe28vega.hpc.amslabs.hpecorp.net>
Date: Tue, 29 Oct 2024 09:16:04 -0500
Subject: [PATCH 1/3] Added support for seq_cst clause for flush directive
---
clang/include/clang/AST/OpenMPClause.h | 4 ++--
.../clang/Basic/DiagnosticSemaKinds.td | 2 +-
clang/lib/Sema/SemaOpenMP.cpp | 3 ++-
clang/test/OpenMP/flush_ast_print.cpp | 18 +++++++++++------
clang/test/OpenMP/flush_codegen.cpp | 20 ++++++++++---------
clang/test/OpenMP/flush_messages.cpp | 6 ++----
.../Semantics/OpenMP/clause-validity01.f90 | 3 +--
flang/test/Semantics/OpenMP/flush02.f90 | 4 +---
llvm/include/llvm/Frontend/OpenMP/OMP.td | 1 +
9 files changed, 33 insertions(+), 28 deletions(-)
diff --git a/clang/include/clang/AST/OpenMPClause.h
b/clang/include/clang/AST/OpenMPClause.h
index 9cf46f73f6e46d..8a1f16f96ddc27 100644
--- a/clang/include/clang/AST/OpenMPClause.h
+++ b/clang/include/clang/AST/OpenMPClause.h
@@ -2645,8 +2645,8 @@ class OMPCompareClause final : public OMPClause {
}
};
-/// This represents 'seq_cst' clause in the '#pragma omp atomic'
-/// directive.
+/// This represents 'seq_cst' clause in the '#pragma omp atomic|flush'
+/// directives.
///
/// \code
/// #pragma omp atomic seq_cst
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td
b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index 34ff49d7238a7f..6ce969988491c1 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -11360,7 +11360,7 @@ def err_omp_atomic_weak_no_equality : Error<"expected
'==' operator for 'weak' c
def err_omp_atomic_several_clauses : Error<
"directive '#pragma omp atomic' cannot contain more than one 'read',
'write', 'update', 'capture', or 'compare' clause">;
def err_omp_several_mem_order_clauses : Error<
- "directive '#pragma omp %0' cannot contain more than one %select{'seq_cst',
'relaxed', |}1'acq_rel', 'acquire' or 'release' clause">;
+ "directive '#pragma omp %0' cannot contain more than one 'seq_cst',%select{
'relaxed',|}1 'acq_rel', 'acquire' or 'release' clause">;
def err_omp_atomic_incompatible_mem_order_clause : Error<
"directive '#pragma omp atomic%select{ %0|}1' cannot be used with '%2'
clause">;
def note_omp_previous_mem_order_clause : Note<
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 79e1536288e602..d794d572d07ead 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -11105,7 +11105,8 @@ StmtResult
SemaOpenMP::ActOnOpenMPFlushDirective(ArrayRef<OMPClause *> Clauses,
for (const OMPClause *C : Clauses) {
if (C->getClauseKind() == OMPC_acq_rel ||
C->getClauseKind() == OMPC_acquire ||
- C->getClauseKind() == OMPC_release) {
+ C->getClauseKind() == OMPC_release ||
+ C->getClauseKind() == OMPC_seq_cst /*OpenMP 5.1*/) {
if (MemOrderKind != OMPC_unknown) {
Diag(C->getBeginLoc(), diag::err_omp_several_mem_order_clauses)
<< getOpenMPDirectiveName(OMPD_flush) << 1
diff --git a/clang/test/OpenMP/flush_ast_print.cpp
b/clang/test/OpenMP/flush_ast_print.cpp
index 9578ada020227a..768282422032fd 100644
--- a/clang/test/OpenMP/flush_ast_print.cpp
+++ b/clang/test/OpenMP/flush_ast_print.cpp
@@ -1,10 +1,10 @@
-// RUN: %clang_cc1 -verify -fopenmp -ast-print %s | FileCheck %s
-// RUN: %clang_cc1 -fopenmp -x c++ -std=c++11 -emit-pch -o %t %s
-// RUN: %clang_cc1 -fopenmp -std=c++11 -include-pch %t -verify %s -ast-print |
FileCheck %s
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=51 -ast-print %s |
FileCheck %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=51 -x c++ -std=c++11 -emit-pch -o
%t %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=51 -std=c++11 -include-pch %t
-verify %s -ast-print | FileCheck %s
-// RUN: %clang_cc1 -verify -fopenmp-simd -ast-print %s | FileCheck %s
-// RUN: %clang_cc1 -fopenmp-simd -x c++ -std=c++11 -emit-pch -o %t %s
-// RUN: %clang_cc1 -fopenmp-simd -std=c++11 -include-pch %t -verify %s
-ast-print | FileCheck %s
+// RUN: %clang_cc1 -verify -fopenmp-simd -fopenmp-version=51 -ast-print %s |
FileCheck %s
+// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=51 -x c++ -std=c++11
-emit-pch -o %t %s
+// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=51 -std=c++11 -include-pch
%t -verify %s -ast-print | FileCheck %s
// expected-no-diagnostics
#ifndef HEADER
@@ -19,6 +19,7 @@ T tmain(T argc) {
#pragma omp flush acq_rel
#pragma omp flush acquire
#pragma omp flush release
+#pragma omp flush seq_cst
#pragma omp flush(a)
return a + argc;
}
@@ -27,18 +28,21 @@ T tmain(T argc) {
// CHECK-NEXT: #pragma omp flush acq_rel{{$}}
// CHECK-NEXT: #pragma omp flush acquire{{$}}
// CHECK-NEXT: #pragma omp flush release{{$}}
+// CHECK-NEXT: #pragma omp flush seq_cst{{$}}
// CHECK-NEXT: #pragma omp flush (a)
// CHECK: static int a;
// CHECK-NEXT: #pragma omp flush
// CHECK-NEXT: #pragma omp flush acq_rel{{$}}
// CHECK-NEXT: #pragma omp flush acquire{{$}}
// CHECK-NEXT: #pragma omp flush release{{$}}
+// CHECK-NEXT: #pragma omp flush seq_cst{{$}}
// CHECK-NEXT: #pragma omp flush (a)
// CHECK: static char a;
// CHECK-NEXT: #pragma omp flush
// CHECK-NEXT: #pragma omp flush acq_rel{{$}}
// CHECK-NEXT: #pragma omp flush acquire{{$}}
// CHECK-NEXT: #pragma omp flush release{{$}}
+// CHECK-NEXT: #pragma omp flush seq_cst{{$}}
// CHECK-NEXT: #pragma omp flush (a)
int main(int argc, char **argv) {
@@ -48,11 +52,13 @@ int main(int argc, char **argv) {
#pragma omp flush acq_rel
#pragma omp flush acquire
#pragma omp flush release
+#pragma omp flush seq_cst
#pragma omp flush(a)
// CHECK-NEXT: #pragma omp flush
// CHECK-NEXT: #pragma omp flush acq_rel
// CHECK-NEXT: #pragma omp flush acquire{{$}}
// CHECK-NEXT: #pragma omp flush release
+// CHECK-NEXT: #pragma omp flush seq_cst
// CHECK-NEXT: #pragma omp flush (a)
return tmain(argc) + tmain(argv[0][0]) + a;
}
diff --git a/clang/test/OpenMP/flush_codegen.cpp
b/clang/test/OpenMP/flush_codegen.cpp
index c7dd88ef9ac313..756700836fedd7 100644
--- a/clang/test/OpenMP/flush_codegen.cpp
+++ b/clang/test/OpenMP/flush_codegen.cpp
@@ -1,13 +1,13 @@
-// RUN: %clang_cc1 -verify -fopenmp -x c++ -emit-llvm %s -fexceptions
-fcxx-exceptions -o - | FileCheck %s
-// RUN: %clang_cc1 -fopenmp -x c++ -std=c++11 -triple x86_64-unknown-unknown
-fexceptions -fcxx-exceptions -emit-pch -o %t %s
-// RUN: %clang_cc1 -fopenmp -x c++ -triple x86_64-unknown-unknown -fexceptions
-fcxx-exceptions -debug-info-kind=limited -std=c++11 -include-pch %t -verify %s
-emit-llvm -o - | FileCheck %s
-// RUN: %clang_cc1 -verify -fopenmp -fopenmp-enable-irbuilder -x c++
-emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s
-// RUN: %clang_cc1 -fopenmp -fopenmp-enable-irbuilder -x c++ -std=c++11
-triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
-// RUN: %clang_cc1 -fopenmp -fopenmp-enable-irbuilder -x c++ -triple
x86_64-unknown-unknown -fexceptions -fcxx-exceptions -debug-info-kind=limited
-std=c++11 -include-pch %t -verify %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=51 -x c++ -emit-llvm %s
-fexceptions -fcxx-exceptions -o - | FileCheck %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=51 -x c++ -std=c++11 -triple
x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=51 -x c++ -triple
x86_64-unknown-unknown -fexceptions -fcxx-exceptions -debug-info-kind=limited
-std=c++11 -include-pch %t -verify %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=51
-fopenmp-enable-irbuilder -x c++ -emit-llvm %s -fexceptions -fcxx-exceptions -o
- | FileCheck %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=51 -fopenmp-enable-irbuilder -x
c++ -std=c++11 -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions
-emit-pch -o %t %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=51 -fopenmp-enable-irbuilder -x
c++ -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions
-debug-info-kind=limited -std=c++11 -include-pch %t -verify %s -emit-llvm -o -
| FileCheck %s
-// RUN: %clang_cc1 -verify -fopenmp-simd -x c++ -emit-llvm %s -fexceptions
-fcxx-exceptions -o - | FileCheck --check-prefix SIMD-ONLY0 %s
-// RUN: %clang_cc1 -fopenmp-simd -x c++ -std=c++11 -triple
x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
-// RUN: %clang_cc1 -fopenmp-simd -x c++ -triple x86_64-unknown-unknown
-fexceptions -fcxx-exceptions -debug-info-kind=limited -std=c++11 -include-pch
%t -verify %s -emit-llvm -o - | FileCheck --check-prefix SIMD-ONLY0 %s
+// RUN: %clang_cc1 -verify -fopenmp-simd -fopenmp-version=51 -x c++ -emit-llvm
%s -fexceptions -fcxx-exceptions -o - | FileCheck --check-prefix SIMD-ONLY0 %s
+// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=51 -x c++ -std=c++11 -triple
x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
+// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=51 -x c++ -triple
x86_64-unknown-unknown -fexceptions -fcxx-exceptions -debug-info-kind=limited
-std=c++11 -include-pch %t -verify %s -emit-llvm -o - | FileCheck
--check-prefix SIMD-ONLY0 %s
// SIMD-ONLY0-NOT: {{__kmpc|__tgt}}
// expected-no-diagnostics
#ifndef HEADER
@@ -17,6 +17,7 @@ template <class T>
T tmain(T argc) {
static T a;
#pragma omp flush
+#pragma omp flush seq_cst
#pragma omp flush acq_rel
#pragma omp flush acquire
#pragma omp flush release
@@ -28,6 +29,7 @@ T tmain(T argc) {
int main() {
static int a;
#pragma omp flush
+#pragma omp flush seq_cst
#pragma omp flush acq_rel
#pragma omp flush acquire
#pragma omp flush release
diff --git a/clang/test/OpenMP/flush_messages.cpp
b/clang/test/OpenMP/flush_messages.cpp
index ad4830b5bf94f9..e78949bc924e15 100644
--- a/clang/test/OpenMP/flush_messages.cpp
+++ b/clang/test/OpenMP/flush_messages.cpp
@@ -134,14 +134,12 @@ label1 : {
#pragma omp flush(argc) flush(argc) // expected-warning {{extra tokens at the
end of '#pragma omp flush' are ignored}}
#pragma omp parallel flush(argc) // expected-warning {{extra tokens at the end
of '#pragma omp parallel' are ignored}}
;
-#pragma omp flush seq_cst // expected-error {{unexpected OpenMP clause
'seq_cst' in directive '#pragma omp flush'}}
#pragma omp flush acq_rel // omp45-error {{unexpected OpenMP clause 'acq_rel'
in directive '#pragma omp flush'}}
#pragma omp flush acquire // omp45-error {{unexpected OpenMP clause 'acquire'
in directive '#pragma omp flush'}}
#pragma omp flush release // omp45-error {{unexpected OpenMP clause 'release'
in directive '#pragma omp flush'}}
#pragma omp flush relaxed // expected-error {{unexpected OpenMP clause
'relaxed' in directive '#pragma omp flush'}}
-#pragma omp flush seq_cst // expected-error {{unexpected OpenMP clause
'seq_cst' in directive '#pragma omp flush'}}
-#pragma omp flush acq_rel acquire // omp45-error {{unexpected OpenMP clause
'acq_rel' in directive '#pragma omp flush'}} omp45-error {{unexpected OpenMP
clause 'acquire' in directive '#pragma omp flush'}} omp51-error {{directive
'#pragma omp flush' cannot contain more than one 'acq_rel', 'acquire' or
'release' clause}} omp51-note {{'acq_rel' clause used here}}
-#pragma omp flush release acquire // omp45-error {{unexpected OpenMP clause
'release' in directive '#pragma omp flush'}} omp45-error {{unexpected OpenMP
clause 'acquire' in directive '#pragma omp flush'}} omp51-error {{directive
'#pragma omp flush' cannot contain more than one 'acq_rel', 'acquire' or
'release' clause}} omp51-note {{'release' clause used here}}
+#pragma omp flush acq_rel acquire // omp45-error {{unexpected OpenMP clause
'acq_rel' in directive '#pragma omp flush'}} omp45-error {{unexpected OpenMP
clause 'acquire' in directive '#pragma omp flush'}} omp51-error {{directive
'#pragma omp flush' cannot contain more than one 'seq_cst', 'acq_rel',
'acquire' or 'release' clause}} omp51-note {{'acq_rel' clause used here}}
+#pragma omp flush release acquire // omp45-error {{unexpected OpenMP clause
'release' in directive '#pragma omp flush'}} omp45-error {{unexpected OpenMP
clause 'acquire' in directive '#pragma omp flush'}} omp51-error {{directive
'#pragma omp flush' cannot contain more than one 'seq_cst', 'acq_rel',
'acquire' or 'release' clause}} omp51-note {{'release' clause used here}}
#pragma omp flush acq_rel (argc) // omp45-error {{unexpected OpenMP clause
'acq_rel' in directive '#pragma omp flush'}} expected-warning {{extra tokens at
the end of '#pragma omp flush' are ignored}}
#pragma omp flush(argc) acq_rel // omp45-error {{unexpected OpenMP clause
'acq_rel' in directive '#pragma omp flush'}} omp51-error {{'flush' directive
with memory order clause 'acq_rel' cannot have the list}} omp51-note {{memory
order clause 'acq_rel' is specified here}}
return tmain(argc);
diff --git a/flang/test/Semantics/OpenMP/clause-validity01.f90
b/flang/test/Semantics/OpenMP/clause-validity01.f90
index 1a7a57b124e9bd..6ff1592c9bde14 100644
--- a/flang/test/Semantics/OpenMP/clause-validity01.f90
+++ b/flang/test/Semantics/OpenMP/clause-validity01.f90
@@ -1,6 +1,6 @@
! REQUIRES: openmp_runtime
-! RUN: %python %S/../test_errors.py %s %flang_fc1 %openmp_flags
%openmp_module_flag -fopenmp-version=50
+! RUN: %python %S/../test_errors.py %s %flang_fc1 %openmp_flags
%openmp_module_flag -fopenmp-version=51
use omp_lib
! Check OpenMP clause validity for the following directives:
!
@@ -507,7 +507,6 @@
!$omp flush acquire
!ERROR: If memory-order-clause is RELEASE, ACQUIRE, or ACQ_REL, list items
must not be specified on the FLUSH directive
!$omp flush release (c)
- !ERROR: SEQ_CST clause is not allowed on the FLUSH directive
!$omp flush seq_cst
!ERROR: RELAXED clause is not allowed on the FLUSH directive
!$omp flush relaxed
diff --git a/flang/test/Semantics/OpenMP/flush02.f90
b/flang/test/Semantics/OpenMP/flush02.f90
index f06719f302fd7a..53b5b45b580460 100644
--- a/flang/test/Semantics/OpenMP/flush02.f90
+++ b/flang/test/Semantics/OpenMP/flush02.f90
@@ -1,6 +1,6 @@
! REQUIRES: openmp_runtime
-! RUN: %python %S/../test_errors.py %s %flang_fc1 %openmp_flags
-fopenmp-version=50
+! RUN: %python %S/../test_errors.py %s %flang_fc1 %openmp_flags
-fopenmp-version=51
! Check OpenMP 5.0 - 2.17.8 flush Construct
! Restriction -
@@ -27,7 +27,6 @@
!Only memory-order-clauses.
if (omp_get_thread_num() == 1) THEN
! Not allowed clauses.
- !ERROR: SEQ_CST clause is not allowed on the FLUSH directive
!$omp flush seq_cst
!ERROR: RELAXED clause is not allowed on the FLUSH directive
!$omp flush relaxed
@@ -41,7 +40,6 @@
!$omp flush acquire acquire
! Mix of allowed and not allowed.
- !ERROR: SEQ_CST clause is not allowed on the FLUSH directive
!$omp flush seq_cst acquire
END IF
diff --git a/llvm/include/llvm/Frontend/OpenMP/OMP.td
b/llvm/include/llvm/Frontend/OpenMP/OMP.td
index 70179bab475779..96ca0004c79e27 100644
--- a/llvm/include/llvm/Frontend/OpenMP/OMP.td
+++ b/llvm/include/llvm/Frontend/OpenMP/OMP.td
@@ -750,6 +750,7 @@ def OMP_Flush : Directive<"flush"> {
// OMPKinds.def.
VersionedClause<OMPC_Flush>,
VersionedClause<OMPC_Release, 50>,
+ VersionedClause<OMPC_SeqCst, 51>,
];
let association = AS_None;
let category = CA_Executable;
>From 46493d539b54f6d30526ee440686a861228f8970 Mon Sep 17 00:00:00 2001
From: ShashwathiNavada <shashwathinav...@gmail.com>
Date: Tue, 5 Nov 2024 08:42:12 -0600
Subject: [PATCH 2/3] Updated flush_codegen.cpp
---
clang/test/OpenMP/flush_codegen.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/clang/test/OpenMP/flush_codegen.cpp
b/clang/test/OpenMP/flush_codegen.cpp
index 756700836fedd7..fa2586d9fe258d 100644
--- a/clang/test/OpenMP/flush_codegen.cpp
+++ b/clang/test/OpenMP/flush_codegen.cpp
@@ -39,6 +39,7 @@ int main() {
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
+ // CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
return tmain(a);
// CHECK: call {{.*}} [[TMAIN:@.+]](
// CHECK: ret
@@ -50,6 +51,7 @@ int main() {
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
+// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: ret
// CHECK-NOT: line: 0,
>From cd8c20660c40de406a89b458684cfb4c0e319894 Mon Sep 17 00:00:00 2001
From: ShashwathiNavada <shashwathinav...@gmail.com>
Date: Tue, 5 Nov 2024 08:42:12 -0600
Subject: [PATCH 3/3] Updated flush_codegen.cpp
---
clang/docs/OpenMPSupport.rst | 2 +-
clang/test/OpenMP/flush_codegen.cpp | 2 ++
flang/test/Lower/OpenMP/Todo/flush-seq-cst.f90 | 6 ++++++
3 files changed, 9 insertions(+), 1 deletion(-)
create mode 100644 flang/test/Lower/OpenMP/Todo/flush-seq-cst.f90
diff --git a/clang/docs/OpenMPSupport.rst b/clang/docs/OpenMPSupport.rst
index 6c7afc12b44ebb..3360de6e936627 100644
--- a/clang/docs/OpenMPSupport.rst
+++ b/clang/docs/OpenMPSupport.rst
@@ -288,7 +288,7 @@ implementation.
+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
| memory management | changes to omp_alloctrait_key enum
| :none:`unclaimed` |
|
+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory model | seq_cst clause on flush construct
| :none:`unclaimed` |
|
+| memory model | seq_cst clause on flush construct
| :good:`done` |
https://github.com/llvm/llvm-project/pull/114072
|
+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
| misc | 'omp_all_memory' keyword and use in 'depend'
clause | :good:`done` | D125828, D126321
|
+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
diff --git a/clang/test/OpenMP/flush_codegen.cpp
b/clang/test/OpenMP/flush_codegen.cpp
index 756700836fedd7..fa2586d9fe258d 100644
--- a/clang/test/OpenMP/flush_codegen.cpp
+++ b/clang/test/OpenMP/flush_codegen.cpp
@@ -39,6 +39,7 @@ int main() {
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
+ // CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
return tmain(a);
// CHECK: call {{.*}} [[TMAIN:@.+]](
// CHECK: ret
@@ -50,6 +51,7 @@ int main() {
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
+// CHECK: call {{.*}}void @__kmpc_flush(ptr {{(@|%).+}})
// CHECK: ret
// CHECK-NOT: line: 0,
diff --git a/flang/test/Lower/OpenMP/Todo/flush-seq-cst.f90
b/flang/test/Lower/OpenMP/Todo/flush-seq-cst.f90
new file mode 100644
index 00000000000000..753e1cfcd7aa50
--- /dev/null
+++ b/flang/test/Lower/OpenMP/Todo/flush-seq-cst.f90
@@ -0,0 +1,6 @@
+! RUN: %not_todo_cmd %flang_fc1 -emit-fir -fopenmp -o - %s -fopenmp-version=51
2>&1 | FileCheck %s
+
+! CHECK: not yet implemented: Unhandled clause SEQ_CST in FLUSH construct
+program flush_seq_cst
+ !$omp flush seq_cst
+end program
\ No newline at end of file
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