[clang] [Clang][OpenMP] Add parsing for dims modifier in num_teams and thread_limit (PR #206412)
Kevin Sala Penades via cfe-commits
cfe-commits at lists.llvm.org
Thu Jul 9 11:48:19 PDT 2026
https://github.com/kevinsala updated https://github.com/llvm/llvm-project/pull/206412
>From d5627019442a9f2eeecab5cef15fc7df429f4e16 Mon Sep 17 00:00:00 2001
From: Kevin Sala <salapenades1 at llnl.gov>
Date: Sun, 28 Jun 2026 14:14:36 -0700
Subject: [PATCH 1/3] [Clang][OpenMP] Add parsing for dims modifier in
num_teams and thread_limit
---
clang/include/clang/AST/OpenMPClause.h | 82 +++++++--
.../clang/Basic/DiagnosticSemaKinds.td | 13 +-
clang/include/clang/Basic/OpenMPKinds.def | 8 +
clang/include/clang/Basic/OpenMPKinds.h | 6 +
clang/include/clang/Sema/SemaOpenMP.h | 33 ++--
clang/lib/AST/OpenMPClause.cpp | 29 +++-
clang/lib/AST/StmtProfile.cpp | 3 +
clang/lib/Basic/OpenMPKinds.cpp | 21 ++-
clang/lib/Parse/ParseOpenMP.cpp | 84 +++++++---
clang/lib/Sema/SemaOpenMP.cpp | 156 +++++++++++++++---
clang/lib/Sema/TreeTransform.h | 34 ++--
clang/lib/Serialization/ASTReader.cpp | 3 +
clang/lib/Serialization/ASTWriter.cpp | 3 +
clang/test/OpenMP/dims_modifier_ast_print.cpp | 40 +++++
clang/test/OpenMP/dims_modifier_messages.cpp | 129 +++++++++++++++
clang/test/OpenMP/ompx_bare_messages.c | 2 +-
...et_teams_distribute_num_teams_messages.cpp | 8 +-
...ribute_parallel_for_num_teams_messages.cpp | 8 +-
.../test/OpenMP/teams_num_teams_messages.cpp | 20 +--
clang/tools/libclang/CIndex.cpp | 2 +
20 files changed, 577 insertions(+), 107 deletions(-)
create mode 100644 clang/test/OpenMP/dims_modifier_ast_print.cpp
create mode 100644 clang/test/OpenMP/dims_modifier_messages.cpp
diff --git a/clang/include/clang/AST/OpenMPClause.h b/clang/include/clang/AST/OpenMPClause.h
index 12959fe0c2ff0..641c03bf8ff5c 100644
--- a/clang/include/clang/AST/OpenMPClause.h
+++ b/clang/include/clang/AST/OpenMPClause.h
@@ -6982,6 +6982,13 @@ class OMPMapClause final : public OMPMappableExprListClause<OMPMapClause>,
/// single expression 'n' as upper-bound and modifier expression 'm' as
/// lower-bound.
///
+/// \code
+/// #pragma omp teams num_teams(dims(2): x, y)
+/// \endcode
+/// In this example directive '#pragma omp teams' has clause 'num_teams' with
+/// the 'dims' modifier specifying two dimensions. The list specifies the number
+/// of teams in each dimension.
+///
/// When 'ompx_bare' clause exists on a 'target' directive, 'num_teams' clause
/// can accept up to three expressions.
///
@@ -6992,6 +6999,7 @@ class OMPNumTeamsClause final
: public OMPVarListClause<OMPNumTeamsClause>,
public OMPClauseWithPreInit,
private llvm::TrailingObjects<OMPNumTeamsClause, Expr *> {
+ friend class OMPClauseReader;
friend OMPVarListClause;
friend TrailingObjects;
@@ -7013,6 +7021,15 @@ class OMPNumTeamsClause final
SourceLocation(), SourceLocation(), N),
OMPClauseWithPreInit(this) {}
+ /// Set the modifier.
+ void setModifier(OpenMPNumTeamsClauseModifier M) { Modifier = M; }
+
+ /// Set the expression of the modifier.
+ void setModifierExpr(Expr *E) { *varlist_end() = E; }
+
+ /// Set the location of the modifier.
+ void setModifierLoc(SourceLocation Loc) { ModifierLoc = Loc; }
+
public:
/// Creates clause with a list of variables \a VL.
///
@@ -7049,24 +7066,22 @@ class OMPNumTeamsClause final
/// Get the modifier.
OpenMPNumTeamsClauseModifier getModifier() const { return Modifier; }
- /// Set the modifier.
- void setModifier(OpenMPNumTeamsClauseModifier M) { Modifier = M; }
-
/// Get the expression of the modifier.
const Expr *getModifierExpr() const { return *varlist_end(); }
/// Get the expression of the modifier.
Expr *getModifierExpr() { return *varlist_end(); }
- /// Set the expression of the modifier.
- void setModifierExpr(Expr *E) { *varlist_end() = E; }
+ /// Get the expression of the modifier if it is the dims modifier.
+ const Expr *getDimsModifierExpr() const {
+ if (Modifier == OMPC_NUMTEAMS_dims)
+ return getModifierExpr();
+ return nullptr;
+ }
/// Get the location of the modifier.
SourceLocation getModifierLoc() const { return ModifierLoc; }
- /// Set the location of the modifier.
- void setModifierLoc(SourceLocation Loc) { ModifierLoc = Loc; }
-
child_range children() {
return child_range(reinterpret_cast<Stmt **>(varlist_begin()),
reinterpret_cast<Stmt **>(varlist_end()) + 1);
@@ -7097,6 +7112,13 @@ class OMPNumTeamsClause final
/// In this example directive '#pragma omp teams' has clause 'thread_limit'
/// with single expression 'n'.
///
+/// \code
+/// #pragma omp teams thread_limit(dims(2): x, y)
+/// \endcode
+/// In this example directive '#pragma omp teams' has clause 'thread_limit' with
+/// the 'dims' modifier specifying two dimensions. The list specifies the limit
+/// on the number of threads in each dimension.
+///
/// When 'ompx_bare' clause exists on a 'target' directive, 'thread_limit'
/// clause can accept up to three expressions.
///
@@ -7107,9 +7129,16 @@ class OMPThreadLimitClause final
: public OMPVarListClause<OMPThreadLimitClause>,
public OMPClauseWithPreInit,
private llvm::TrailingObjects<OMPThreadLimitClause, Expr *> {
+ friend class OMPClauseReader;
friend OMPVarListClause;
friend TrailingObjects;
+ /// Modifier that was specified.
+ OpenMPThreadLimitClauseModifier Modifier = OMPC_THREADLIMIT_unknown;
+
+ /// Location of the modifier.
+ SourceLocation ModifierLoc;
+
OMPThreadLimitClause(const ASTContext &C, SourceLocation StartLoc,
SourceLocation LParenLoc, SourceLocation EndLoc,
unsigned N)
@@ -7123,6 +7152,15 @@ class OMPThreadLimitClause final
SourceLocation(), SourceLocation(), N),
OMPClauseWithPreInit(this) {}
+ /// Set the modifier.
+ void setModifier(OpenMPThreadLimitClauseModifier M) { Modifier = M; }
+
+ /// Set the location of the modifier.
+ void setModifierLoc(SourceLocation Loc) { ModifierLoc = Loc; }
+
+ /// Set the expression of the modifier.
+ void setModifierExpr(Expr *E) { *varlist_end() = E; }
+
public:
/// Creates clause with a list of variables \a VL.
///
@@ -7131,11 +7169,16 @@ class OMPThreadLimitClause final
/// \param LParenLoc Location of '('.
/// \param EndLoc Ending location of the clause.
/// \param VL List of references to the variables.
+ /// \param Modifier The modifier specified in the clause.
+ /// \param ModifierExpr The expression of the modifier.
+ /// \param ModifierLoc Location of the modifier.
/// \param PreInit
static OMPThreadLimitClause *
Create(const ASTContext &C, OpenMPDirectiveKind CaptureRegion,
SourceLocation StartLoc, SourceLocation LParenLoc,
- SourceLocation EndLoc, ArrayRef<Expr *> VL, Stmt *PreInit);
+ SourceLocation EndLoc, ArrayRef<Expr *> VL,
+ OpenMPThreadLimitClauseModifier Modifier, Expr *ModifierExpr,
+ SourceLocation ModifierLoc, Stmt *PreInit);
/// Creates an empty clause with \a N variables.
///
@@ -7151,9 +7194,28 @@ class OMPThreadLimitClause final
return const_cast<OMPThreadLimitClause *>(this)->getThreadLimit();
}
+ /// Get the modifier.
+ OpenMPThreadLimitClauseModifier getModifier() const { return Modifier; }
+
+ /// Get the expression of the modifier.
+ const Expr *getModifierExpr() const { return *varlist_end(); }
+
+ /// Get the expression of the modifier.
+ Expr *getModifierExpr() { return *varlist_end(); }
+
+ /// Get the expression of the modifier if it is the dims modifier.
+ const Expr *getDimsModifierExpr() const {
+ if (Modifier == OMPC_THREADLIMIT_dims)
+ return getModifierExpr();
+ return nullptr;
+ }
+
+ /// Get the location of the modifier.
+ SourceLocation getModifierLoc() const { return ModifierLoc; }
+
child_range children() {
return child_range(reinterpret_cast<Stmt **>(varlist_begin()),
- reinterpret_cast<Stmt **>(varlist_end()));
+ reinterpret_cast<Stmt **>(varlist_end()) + 1);
}
const_child_range children() const {
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index fc5ee57cd855c..c3a4ae5f5b80a 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -12806,9 +12806,11 @@ def warn_omp_unterminated_declare_target : Warning<
"expected '#pragma omp end declare target' at end of file to match '#pragma omp %0'">,
InGroup<SourceUsesOpenMP>;
def err_ompx_bare_no_grid : Error<
- "'ompx_bare' clauses requires explicit grid size via 'num_teams' and 'thread_limit' clauses">;
-def err_omp_multi_expr_not_allowed: Error<"only one expression allowed in '%0' clause">;
-def err_ompx_more_than_three_expr_not_allowed: Error<"at most three expressions are allowed in '%0' clause in 'target teams ompx_bare' construct">;
+ "'ompx_bare' clause requires explicit grid size via 'num_teams' and 'thread_limit' clauses">;
+def err_ompx_more_than_three_expr_not_allowed : Error<"at most three expressions are allowed in '%0' clause in 'target teams ompx_bare' construct">;
+def err_ompx_bare_no_dims : Error<
+ "'ompx_bare' clause cannot be specified with 'dims' modifier in 'num_teams' and 'thread_limit' clauses">;
+def err_omp_max_three_exprs: Error<"maximum three expressions are supported in '%0' clause">;
def err_omp_transparent_invalid_value : Error<"invalid value for transparent clause,"
" expected one of: omp_not_impex, omp_import, omp_export, omp_impex">;
def err_omp_transparent_invalid_type : Error<
@@ -12817,6 +12819,10 @@ def err_omp_num_teams_lower_bound_larger
: Error<"lower bound is greater than upper bound in 'num_teams' clause">;
def err_omp_modifier_requires_version : Error<
"'%0' modifier in '%1' clause requires OpenMP %2 or later">;
+def err_omp_unexpected_num_exprs
+ : Error<"unexpected number of expressions in '%0' clause (expected %1, have %2)">;
+def err_omp_incompatible_modifiers
+ : Error<"'%0' modifier cannot be specified with '%1' modifier in '%2' clause">;
} // end of OpenMP category
let CategoryName = "Related Result Type Issue" in {
@@ -12843,7 +12849,6 @@ def note_related_result_type_explicit : Note<
"%select{| and is expected to return an instance of its class type}0">;
def err_invalid_type_for_program_scope_var : Error<
"the %0 type cannot be used to declare a program scope variable">;
-
}
let CategoryName = "Modules Issue" in {
diff --git a/clang/include/clang/Basic/OpenMPKinds.def b/clang/include/clang/Basic/OpenMPKinds.def
index 079ff4a583f9f..5c396a5d2d4b3 100644
--- a/clang/include/clang/Basic/OpenMPKinds.def
+++ b/clang/include/clang/Basic/OpenMPKinds.def
@@ -101,6 +101,9 @@
#ifndef OPENMP_NUMTHREADS_MODIFIER
#define OPENMP_NUMTHREADS_MODIFIER(Name)
#endif
+#ifndef OPENMP_THREADLIMIT_MODIFIER
+#define OPENMP_THREADLIMIT_MODIFIER(Name)
+#endif
#ifndef OPENMP_DOACROSS_MODIFIER
#define OPENMP_DOACROSS_MODIFIER(Name)
#endif
@@ -273,10 +276,14 @@ OPENMP_NUMTASKS_MODIFIER(strict)
// Modifiers for the 'num_teams' clause.
OPENMP_NUMTEAMS_MODIFIER(lower_bound)
+OPENMP_NUMTEAMS_MODIFIER(dims)
// Modifiers for the 'num_tasks' clause.
OPENMP_NUMTHREADS_MODIFIER(strict)
+// Modifiers for the 'thread_limit' clause.
+OPENMP_THREADLIMIT_MODIFIER(dims)
+
// Modifiers for 'allocate' clause.
OPENMP_ALLOCATE_MODIFIER(allocator)
OPENMP_ALLOCATE_MODIFIER(align)
@@ -301,6 +308,7 @@ OPENMP_USE_DEVICE_PTR_FALLBACK_MODIFIER(fb_preserve)
#undef OPENMP_NUMTASKS_MODIFIER
#undef OPENMP_NUMTEAMS_MODIFIER
#undef OPENMP_NUMTHREADS_MODIFIER
+#undef OPENMP_THREADLIMIT_MODIFIER
#undef OPENMP_DYN_GROUPPRIVATE_MODIFIER
#undef OPENMP_DYN_GROUPPRIVATE_FALLBACK_MODIFIER
#undef OPENMP_GRAINSIZE_MODIFIER
diff --git a/clang/include/clang/Basic/OpenMPKinds.h b/clang/include/clang/Basic/OpenMPKinds.h
index 3ee6cb83a431e..36c388668a455 100644
--- a/clang/include/clang/Basic/OpenMPKinds.h
+++ b/clang/include/clang/Basic/OpenMPKinds.h
@@ -274,6 +274,12 @@ enum OpenMPNumThreadsClauseModifier {
OMPC_NUMTHREADS_unknown
};
+enum OpenMPThreadLimitClauseModifier {
+#define OPENMP_THREADLIMIT_MODIFIER(Name) OMPC_THREADLIMIT_##Name,
+#include "clang/Basic/OpenMPKinds.def"
+ OMPC_THREADLIMIT_unknown
+};
+
/// OpenMP dependence types for 'doacross' clause.
enum OpenMPDoacrossClauseModifier {
#define OPENMP_DOACROSS_MODIFIER(Name) OMPC_DOACROSS_##Name,
diff --git a/clang/include/clang/Sema/SemaOpenMP.h b/clang/include/clang/Sema/SemaOpenMP.h
index f689e227866a7..9ef388a744db8 100644
--- a/clang/include/clang/Sema/SemaOpenMP.h
+++ b/clang/include/clang/Sema/SemaOpenMP.h
@@ -31,6 +31,7 @@
#include "llvm/ADT/DenseMap.h"
#include "llvm/Frontend/OpenMP/OMP.h.inc"
#include "llvm/Frontend/OpenMP/OMPConstants.h"
+#include <array>
#include <optional>
#include <string>
#include <utility>
@@ -1188,10 +1189,15 @@ class SemaOpenMP : public SemaBase {
SourceLocation RLoc;
CXXScopeSpec ReductionOrMapperIdScopeSpec;
DeclarationNameInfo ReductionOrMapperId;
- int ExtraModifier =
- -1; ///< Additional modifier for linear, map, depend,
- ///< lastprivate, use_device_ptr, or num_teams clause.
- Expr *ExtraModifierExpr = nullptr;
+ std::array<int, 2> ExtraModifierArray = {-1, -1};
+ std::array<Expr *, 2> ExtraModifierExprArray = {nullptr, nullptr};
+ std::array<SourceLocation, 2> ExtraModifierLocArray = {SourceLocation(),
+ SourceLocation()};
+ /// Additional modifier for linear, map, depend, lastprivate,
+ /// use_device_ptr, or num_teams clause.
+ int &ExtraModifier = ExtraModifierArray[0];
+ Expr *&ExtraModifierExpr = ExtraModifierExprArray[0];
+ SourceLocation &ExtraModifierLoc = ExtraModifierLocArray[0];
int OriginalSharingModifier = 0; // Default is shared
int NeedDevicePtrModifier = 0;
SourceLocation NeedDevicePtrModifierLoc;
@@ -1203,7 +1209,6 @@ class SemaOpenMP : public SemaBase {
MotionModifiers;
SmallVector<SourceLocation, NumberOfOMPMotionModifiers> MotionModifiersLoc;
bool IsMapTypeImplicit = false;
- SourceLocation ExtraModifierLoc;
SourceLocation OriginalSharingModifierLoc;
SourceLocation OmpAllMemoryLoc;
SourceLocation
@@ -1345,13 +1350,15 @@ class SemaOpenMP : public SemaBase {
/// Called on well-formed 'num_teams' clause.
OMPClause *ActOnOpenMPNumTeamsClause(
ArrayRef<Expr *> VarList, OpenMPNumTeamsClauseModifier Modifier,
- Expr *ModifierExpr, SourceLocation ModifierLoc, SourceLocation StartLoc,
+ Expr *ModifierExpr, SourceLocation ModifierLoc,
+ OpenMPNumTeamsClauseModifier ModifierExtra, Expr *ModifierExtraExpr,
+ SourceLocation ModifierExtraLoc, SourceLocation StartLoc,
SourceLocation LParenLoc, SourceLocation EndLoc);
/// Called on well-formed 'thread_limit' clause.
- OMPClause *ActOnOpenMPThreadLimitClause(ArrayRef<Expr *> VarList,
- SourceLocation StartLoc,
- SourceLocation LParenLoc,
- SourceLocation EndLoc);
+ OMPClause *ActOnOpenMPThreadLimitClause(
+ ArrayRef<Expr *> VarList, OpenMPThreadLimitClauseModifier Modifier,
+ Expr *ModifierExpr, SourceLocation ModifierLoc, SourceLocation StartLoc,
+ SourceLocation LParenLoc, SourceLocation EndLoc);
/// Called on well-formed 'priority' clause.
OMPClause *ActOnOpenMPPriorityClause(Expr *Priority, SourceLocation StartLoc,
SourceLocation LParenLoc,
@@ -1484,6 +1491,12 @@ class SemaOpenMP : public SemaBase {
SourceLocation LLoc, SourceLocation RLoc,
ArrayRef<OMPIteratorData> Data);
+ ExprResult ActOnOpenMPDimsModifier(OpenMPClauseKind Kind, int Modifier,
+ Expr *ModifierExpr,
+ SourceLocation ModifierLoc,
+ ArrayRef<Expr *> VarList,
+ SourceLocation VarListEndLoc);
+
void handleOMPAssumeAttr(Decl *D, const ParsedAttr &AL);
/// Setter and getter functions for device_num.
diff --git a/clang/lib/AST/OpenMPClause.cpp b/clang/lib/AST/OpenMPClause.cpp
index f3e548e898b39..d451255bf5845 100644
--- a/clang/lib/AST/OpenMPClause.cpp
+++ b/clang/lib/AST/OpenMPClause.cpp
@@ -1978,18 +1978,24 @@ OMPNumTeamsClause *OMPNumTeamsClause::CreateEmpty(const ASTContext &C,
OMPThreadLimitClause *OMPThreadLimitClause::Create(
const ASTContext &C, OpenMPDirectiveKind CaptureRegion,
SourceLocation StartLoc, SourceLocation LParenLoc, SourceLocation EndLoc,
- ArrayRef<Expr *> VL, Stmt *PreInit) {
- void *Mem = C.Allocate(totalSizeToAlloc<Expr *>(VL.size()));
+ ArrayRef<Expr *> VL, OpenMPThreadLimitClauseModifier Modifier,
+ Expr *ModifierExpr, SourceLocation ModifierLoc, Stmt *PreInit) {
+ // Reserve space for an extra modifier expression.
+ void *Mem = C.Allocate(totalSizeToAlloc<Expr *>(VL.size() + 1));
OMPThreadLimitClause *Clause =
new (Mem) OMPThreadLimitClause(C, StartLoc, LParenLoc, EndLoc, VL.size());
Clause->setVarRefs(VL);
+ Clause->setModifier(Modifier);
+ Clause->setModifierExpr(ModifierExpr);
+ Clause->setModifierLoc(ModifierLoc);
Clause->setPreInitStmt(PreInit, CaptureRegion);
return Clause;
}
OMPThreadLimitClause *OMPThreadLimitClause::CreateEmpty(const ASTContext &C,
unsigned N) {
- void *Mem = C.Allocate(totalSizeToAlloc<Expr *>(N));
+ // Reserve space for an extra modifier expression.
+ void *Mem = C.Allocate(totalSizeToAlloc<Expr *>(N + 1));
return new (Mem) OMPThreadLimitClause(N);
}
@@ -2373,9 +2379,13 @@ void OMPClausePrinter::VisitOMPDeviceClause(OMPDeviceClause *Node) {
void OMPClausePrinter::VisitOMPNumTeamsClause(OMPNumTeamsClause *Node) {
if (!Node->varlist_empty()) {
OS << "num_teams";
- if (const Expr *LowerBound = Node->getModifierExpr()) {
+ if (Node->getModifier() != OMPC_NUMTEAMS_unknown) {
OS << "(";
- LowerBound->printPretty(OS, nullptr, Policy, 0);
+ if (Node->getModifier() == OMPC_NUMTEAMS_dims)
+ OS << "dims(";
+ Node->getModifierExpr()->printPretty(OS, nullptr, Policy, 0);
+ if (Node->getModifier() == OMPC_NUMTEAMS_dims)
+ OS << ")";
VisitOMPClauseList(Node, ':');
} else {
VisitOMPClauseList(Node, '(');
@@ -2387,7 +2397,14 @@ void OMPClausePrinter::VisitOMPNumTeamsClause(OMPNumTeamsClause *Node) {
void OMPClausePrinter::VisitOMPThreadLimitClause(OMPThreadLimitClause *Node) {
if (!Node->varlist_empty()) {
OS << "thread_limit";
- VisitOMPClauseList(Node, '(');
+ if (Node->getModifier() == OMPC_THREADLIMIT_dims) {
+ OS << "(dims(";
+ Node->getModifierExpr()->printPretty(OS, nullptr, Policy, 0);
+ OS << ")";
+ VisitOMPClauseList(Node, ':');
+ } else {
+ VisitOMPClauseList(Node, '(');
+ }
OS << ")";
}
}
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index a7e7006c98a1b..291c72385518e 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -920,6 +920,9 @@ void OMPClauseProfiler::VisitOMPNumTeamsClause(const OMPNumTeamsClause *C) {
}
void OMPClauseProfiler::VisitOMPThreadLimitClause(
const OMPThreadLimitClause *C) {
+ Profiler->VisitInteger(C->getModifier());
+ if (const Expr *Modifier = C->getModifierExpr())
+ Profiler->VisitStmt(Modifier);
VisitOMPClauseList(C);
VisitOMPClauseWithPreInit(C);
}
diff --git a/clang/lib/Basic/OpenMPKinds.cpp b/clang/lib/Basic/OpenMPKinds.cpp
index c590113578081..890ed0d29a7c6 100644
--- a/clang/lib/Basic/OpenMPKinds.cpp
+++ b/clang/lib/Basic/OpenMPKinds.cpp
@@ -224,6 +224,15 @@ unsigned clang::getOpenMPSimpleClauseType(OpenMPClauseKind Kind, StringRef Str,
return OMPC_NUMTEAMS_unknown;
return Type;
}
+ case OMPC_thread_limit: {
+ unsigned Type = llvm::StringSwitch<unsigned>(Str)
+#define OPENMP_THREADLIMIT_MODIFIER(Name) .Case(#Name, OMPC_THREADLIMIT_##Name)
+#include "clang/Basic/OpenMPKinds.def"
+ .Default(OMPC_THREADLIMIT_unknown);
+ if (LangOpts.OpenMP < 61)
+ return OMPC_THREADLIMIT_unknown;
+ return Type;
+ }
case OMPC_allocate:
return llvm::StringSwitch<OpenMPAllocateClauseModifier>(Str)
#define OPENMP_ALLOCATE_MODIFIER(Name) .Case(#Name, OMPC_ALLOCATE_##Name)
@@ -294,7 +303,6 @@ unsigned clang::getOpenMPSimpleClauseType(OpenMPClauseKind Kind, StringRef Str,
case OMPC_relaxed:
case OMPC_threads:
case OMPC_simd:
- case OMPC_thread_limit:
case OMPC_priority:
case OMPC_nogroup:
case OMPC_hint:
@@ -606,6 +614,16 @@ const char *clang::getOpenMPSimpleClauseTypeName(OpenMPClauseKind Kind,
#include "clang/Basic/OpenMPKinds.def"
}
llvm_unreachable("Invalid OpenMP 'num_teams' clause modifier");
+ case OMPC_thread_limit:
+ switch (Type) {
+ case OMPC_THREADLIMIT_unknown:
+ return "unknown";
+#define OPENMP_THREADLIMIT_MODIFIER(Name) \
+ case OMPC_THREADLIMIT_##Name: \
+ return #Name;
+#include "clang/Basic/OpenMPKinds.def"
+ }
+ llvm_unreachable("Invalid OpenMP 'thread_limit' clause modifier");
case OMPC_allocate:
switch (Type) {
case OMPC_ALLOCATE_unknown:
@@ -683,7 +701,6 @@ const char *clang::getOpenMPSimpleClauseTypeName(OpenMPClauseKind Kind,
case OMPC_relaxed:
case OMPC_threads:
case OMPC_simd:
- case OMPC_thread_limit:
case OMPC_priority:
case OMPC_nogroup:
case OMPC_hint:
diff --git a/clang/lib/Parse/ParseOpenMP.cpp b/clang/lib/Parse/ParseOpenMP.cpp
index 62715da7966d0..7ef1e4211a1ef 100644
--- a/clang/lib/Parse/ParseOpenMP.cpp
+++ b/clang/lib/Parse/ParseOpenMP.cpp
@@ -5289,29 +5289,71 @@ bool Parser::ParseOpenMPVarList(OpenMPDirectiveKind DKind,
Diag(Tok, diag::err_modifier_expected_colon) << "fallback";
}
}
- } else if (Kind == OMPC_num_teams) {
- // Handle optional lower-bound modifier for num_teams clause.
- Data.ExtraModifier = OMPC_NUMTEAMS_unknown;
- TentativeParsingAction TPA(*this);
- SourceLocation TLoc = Tok.getLocation();
- ExprResult FirstExpr = ParseAssignmentExpression();
- if (FirstExpr.isInvalid()) {
- SkipUntil(tok::r_paren, tok::annot_pragma_openmp_end, StopBeforeMatch);
- Data.RLoc = Tok.getLocation();
- if (!T.consumeClose())
- Data.RLoc = T.getCloseLocation();
- TPA.Commit();
- return true;
+ } else if (Kind == OMPC_num_teams || Kind == OMPC_thread_limit) {
+ int Mod = 0;
+ // Handle optional dims and lower-bound modifiers for num_teams clause, and
+ // the optional dims modifier for thread_limit clause.
+ Data.ExtraModifierArray[0] = Data.ExtraModifierArray[1] =
+ Kind == OMPC_num_teams ? static_cast<int>(OMPC_NUMTEAMS_unknown)
+ : static_cast<int>(OMPC_THREADLIMIT_unknown);
+
+ // Lower-bound modifier is only accepted in num_teams.
+ bool CanParseLowerBoundModifier = (Kind == OMPC_num_teams);
+ if (Tok.is(tok::identifier) && Tok.getIdentifierInfo()->isStr("dims") &&
+ NextToken().is(tok::l_paren)) {
+ SourceLocation TLoc = Tok.getLocation();
+ ConsumeToken();
+ SourceLocation RLoc;
+ ExprResult ExprR = ParseOpenMPParensExpr(getOpenMPClauseName(Kind), RLoc);
+ if (ExprR.isUsable()) {
+ Data.ExtraModifierArray[Mod] =
+ Kind == OMPC_num_teams ? static_cast<int>(OMPC_NUMTEAMS_dims)
+ : static_cast<int>(OMPC_THREADLIMIT_dims);
+ Data.ExtraModifierExprArray[Mod] = ExprR.get();
+ Data.ExtraModifierLocArray[Mod] = TLoc;
+ ++Mod;
+ }
+
+ CanParseLowerBoundModifier &= Tok.is(tok::comma);
+ if (CanParseLowerBoundModifier || Tok.is(tok::colon)) {
+ ConsumeToken();
+ } else {
+ Diag(Tok, diag::err_modifier_expected_colon)
+ << getOpenMPClauseName(Kind);
+ SkipUntil(tok::r_paren, tok::annot_pragma_openmp_end, StopBeforeMatch);
+ Data.RLoc = Tok.getLocation();
+ if (!T.consumeClose())
+ Data.RLoc = T.getCloseLocation();
+ return true;
+ }
}
- if (Tok.is(tok::colon)) {
- ConsumeToken();
- Data.ExtraModifier = OMPC_NUMTEAMS_lower_bound;
- Data.ExtraModifierExpr = FirstExpr.get();
- Data.ExtraModifierLoc = TLoc;
- TPA.Commit();
- } else {
- TPA.Revert();
+ // The lower bound modifier must appear as the last modifier.
+ if (CanParseLowerBoundModifier) {
+ TentativeParsingAction TPA(*this);
+ SourceLocation TLoc = Tok.getLocation();
+ ExprResult FirstExpr = ParseAssignmentExpression();
+ if (FirstExpr.isInvalid()) {
+ SkipUntil(tok::r_paren, tok::annot_pragma_openmp_end, StopBeforeMatch);
+ Data.RLoc = Tok.getLocation();
+ if (!T.consumeClose())
+ Data.RLoc = T.getCloseLocation();
+ TPA.Commit();
+ return true;
+ }
+
+ if (Tok.is(tok::colon)) {
+ // Correctly parsed the lower bound modifier.
+ ConsumeToken();
+ Data.ExtraModifierArray[Mod] = OMPC_NUMTEAMS_lower_bound;
+ Data.ExtraModifierExprArray[Mod] = FirstExpr.get();
+ Data.ExtraModifierLocArray[Mod] = TLoc;
+ TPA.Commit();
+ } else {
+ // Could not find the colon after the expression, revert it and let this
+ // function parse it as a list of expressions.
+ TPA.Revert();
+ }
}
}
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 0f45a21c5e461..96da4f7a9258d 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -13632,16 +13632,37 @@ static bool checkExprsInMultidimClause(SemaBase &SemaRef, const ClauseT *Clause,
const uint64_t NumVars = Clause->getVarRefs().size();
// The ompx_bare clause allows up to three expressions.
- if (BareClause && NumVars > 3) {
- SemaRef.Diag(Clause->getBeginLoc(),
- diag::err_ompx_more_than_three_expr_not_allowed)
- << getOpenMPClauseName(Clause->getClauseKind());
- return true;
+ if (BareClause) {
+ if (NumVars > 3) {
+ SemaRef.Diag(Clause->getBeginLoc(),
+ diag::err_ompx_more_than_three_expr_not_allowed)
+ << getOpenMPClauseName(Clause->getClauseKind());
+ return true;
+ }
+ return false;
}
- // Only one expression is allowed otherwise.
- if (!BareClause && NumVars != 1) {
- SemaRef.Diag(Clause->getBeginLoc(), diag::err_omp_multi_expr_not_allowed)
+ // By default, only one expression accepted.
+ uint64_t MaxExprs = 1;
+
+ const Expr *DimsExpr = Clause->getDimsModifierExpr();
+ if (DimsExpr) {
+ // Cannot verify the expected size yet.
+ if (DimsExpr->isInstantiationDependent())
+ return false;
+
+ // The dims modifier determines the exact number of expressions.
+ MaxExprs =
+ DimsExpr->EvaluateKnownConstInt(SemaRef.getASTContext()).getExtValue();
+ }
+
+ if (NumVars != MaxExprs) {
+ SemaRef.Diag(Clause->getBeginLoc(), diag::err_omp_unexpected_num_exprs)
+ << getOpenMPClauseName(Clause->getClauseKind()) << MaxExprs << NumVars;
+ return true;
+ }
+ if (NumVars > 3) {
+ SemaRef.Diag(Clause->getBeginLoc(), diag::err_omp_max_three_exprs)
<< getOpenMPClauseName(Clause->getClauseKind());
return true;
}
@@ -13672,9 +13693,16 @@ static bool checkMultidimClauses(SemaBase &SemaRef,
? cast<OMPNumTeamsClause>(*NumTeamsIt)
: nullptr;
- if (BareClause && (!NumTeamsClause || !ThreadLimitClause)) {
- SemaRef.Diag(BareClause->getBeginLoc(), diag::err_ompx_bare_no_grid);
- return true;
+ if (BareClause) {
+ if (!NumTeamsClause || !ThreadLimitClause) {
+ SemaRef.Diag(BareClause->getBeginLoc(), diag::err_ompx_bare_no_grid);
+ return true;
+ }
+ if (ThreadLimitClause->getModifier() == OMPC_THREADLIMIT_dims ||
+ NumTeamsClause->getModifier() == OMPC_NUMTEAMS_dims) {
+ SemaRef.Diag(BareClause->getBeginLoc(), diag::err_ompx_bare_no_dims);
+ return true;
+ }
}
return checkExprsInMultidimClause(SemaRef, ThreadLimitClause, BareClause) ||
checkExprsInMultidimClause(SemaRef, NumTeamsClause, BareClause);
@@ -19336,11 +19364,19 @@ OMPClause *SemaOpenMP::ActOnOpenMPVarListClause(OpenMPClauseKind Kind,
assert(0 <= ExtraModifier && ExtraModifier <= OMPC_NUMTEAMS_unknown &&
"Unexpected num_teams modifier.");
Res = ActOnOpenMPNumTeamsClause(
- VarList, static_cast<OpenMPNumTeamsClauseModifier>(ExtraModifier),
- ExtraModifierExpr, ExtraModifierLoc, StartLoc, LParenLoc, EndLoc);
+ VarList,
+ static_cast<OpenMPNumTeamsClauseModifier>(Data.ExtraModifierArray[0]),
+ Data.ExtraModifierExprArray[0], Data.ExtraModifierLocArray[0],
+ static_cast<OpenMPNumTeamsClauseModifier>(Data.ExtraModifierArray[1]),
+ Data.ExtraModifierExprArray[1], Data.ExtraModifierLocArray[1], StartLoc,
+ LParenLoc, EndLoc);
break;
case OMPC_thread_limit:
- Res = ActOnOpenMPThreadLimitClause(VarList, StartLoc, LParenLoc, EndLoc);
+ assert(0 <= ExtraModifier && ExtraModifier <= OMPC_THREADLIMIT_unknown &&
+ "Unexpected thread_limit modifier.");
+ Res = ActOnOpenMPThreadLimitClause(
+ VarList, static_cast<OpenMPThreadLimitClauseModifier>(ExtraModifier),
+ ExtraModifierExpr, ExtraModifierLoc, StartLoc, LParenLoc, EndLoc);
break;
case OMPC_if:
case OMPC_depobj:
@@ -24405,9 +24441,45 @@ const ValueDecl *SemaOpenMP::getOpenMPDeclareMapperVarName() const {
return cast<DeclRefExpr>(DSAStack->getDeclareMapperVarRef())->getDecl();
}
+ExprResult SemaOpenMP::ActOnOpenMPDimsModifier(OpenMPClauseKind ClauseKind,
+ int Modifier, Expr *ModifierExpr,
+ SourceLocation ModifierLoc,
+ ArrayRef<Expr *> VarList,
+ SourceLocation VarListEndLoc) {
+ assert(ModifierExpr && "Unexpected modifier expression.");
+
+ if (getLangOpts().OpenMP < 61) {
+ Diag(ModifierLoc, diag::err_omp_modifier_requires_version)
+ << getOpenMPSimpleClauseTypeName(ClauseKind, Modifier)
+ << getOpenMPClauseName(ClauseKind) << "6.1";
+ return ExprError();
+ }
+
+ ExprResult DimsRes = VerifyPositiveIntegerConstantInClause(
+ ModifierExpr, ClauseKind, /*StrictlyPositive=*/true,
+ /*SuppressExprDiags=*/false);
+ if (DimsRes.isInvalid())
+ return ExprError();
+
+ ModifierExpr = DimsRes.get();
+ if (ModifierExpr->isInstantiationDependent())
+ return DimsRes;
+
+ uint64_t NumDims =
+ ModifierExpr->EvaluateKnownConstInt(getASTContext()).getExtValue();
+ if (NumDims == VarList.size())
+ return DimsRes;
+
+ Diag(VarListEndLoc, diag::err_omp_unexpected_num_exprs)
+ << getOpenMPClauseName(ClauseKind) << NumDims << VarList.size();
+ return ExprError();
+}
+
OMPClause *SemaOpenMP::ActOnOpenMPNumTeamsClause(
ArrayRef<Expr *> VarList, OpenMPNumTeamsClauseModifier Modifier,
- Expr *ModifierExpr, SourceLocation ModifierLoc, SourceLocation StartLoc,
+ Expr *ModifierExpr, SourceLocation ModifierLoc,
+ OpenMPNumTeamsClauseModifier ModifierExtra, Expr *,
+ SourceLocation ModifierExtraLoc, SourceLocation StartLoc,
SourceLocation LParenLoc, SourceLocation EndLoc) {
if (VarList.empty())
return nullptr;
@@ -24421,10 +24493,27 @@ OMPClause *SemaOpenMP::ActOnOpenMPNumTeamsClause(
}
// OpenMP [teams Construct, Restrictions]
- // The lower-bound expression in num_teams must evaluate to a positive integer
- // value.
- if (ModifierExpr) {
- assert(Modifier == OMPC_NUMTEAMS_lower_bound && "Unexpected modifier.");
+ // The lower-bound modifier cannot be specified if the dims modifier is
+ // specified.
+ if (Modifier != OMPC_NUMTEAMS_unknown &&
+ ModifierExtra != OMPC_NUMTEAMS_unknown) {
+ Diag(ModifierExtraLoc, diag::err_omp_incompatible_modifiers)
+ << getOpenMPSimpleClauseTypeName(llvm::omp::OMPC_num_teams,
+ ModifierExtra)
+ << getOpenMPSimpleClauseTypeName(llvm::omp::OMPC_num_teams, Modifier)
+ << getOpenMPClauseName(llvm::omp::OMPC_num_teams);
+ ModifierExtra = OMPC_NUMTEAMS_unknown;
+ ModifierExtraLoc = SourceLocation();
+ }
+
+ if (Modifier == OMPC_NUMTEAMS_dims) {
+ ExprResult Res = ActOnOpenMPDimsModifier(
+ OMPC_num_teams, Modifier, ModifierExpr, ModifierLoc, VarList, EndLoc);
+ if (Res.isInvalid())
+ return nullptr;
+ ModifierExpr = Res.get();
+ } else if (Modifier == OMPC_NUMTEAMS_lower_bound) {
+ assert(ModifierExpr && "Unexpected modifier expression.");
if (getLangOpts().OpenMP < 51) {
Diag(ModifierLoc, diag::err_omp_modifier_requires_version)
@@ -24433,6 +24522,9 @@ OMPClause *SemaOpenMP::ActOnOpenMPNumTeamsClause(
return nullptr;
}
+ // OpenMP [teams Construct, Restrictions]
+ // The lower-bound expression in num_teams must evaluate to a positive
+ // integer value.
if (!isNonNegativeIntegerValue(ModifierExpr, SemaRef, OMPC_num_teams,
/*StrictlyPositive=*/true))
return nullptr;
@@ -24489,10 +24581,10 @@ OMPClause *SemaOpenMP::ActOnOpenMPNumTeamsClause(
ModifierExpr, ModifierLoc, PreInit);
}
-OMPClause *SemaOpenMP::ActOnOpenMPThreadLimitClause(ArrayRef<Expr *> VarList,
- SourceLocation StartLoc,
- SourceLocation LParenLoc,
- SourceLocation EndLoc) {
+OMPClause *SemaOpenMP::ActOnOpenMPThreadLimitClause(
+ ArrayRef<Expr *> VarList, OpenMPThreadLimitClauseModifier Modifier,
+ Expr *ModifierExpr, SourceLocation ModifierLoc, SourceLocation StartLoc,
+ SourceLocation LParenLoc, SourceLocation EndLoc) {
if (VarList.empty())
return nullptr;
@@ -24504,12 +24596,22 @@ OMPClause *SemaOpenMP::ActOnOpenMPThreadLimitClause(ArrayRef<Expr *> VarList,
return nullptr;
}
+ if (Modifier == OMPC_THREADLIMIT_dims) {
+ ExprResult Res =
+ ActOnOpenMPDimsModifier(OMPC_thread_limit, Modifier, ModifierExpr,
+ ModifierLoc, VarList, EndLoc);
+ if (Res.isInvalid())
+ return nullptr;
+ ModifierExpr = Res.get();
+ }
+
OpenMPDirectiveKind DKind = DSAStack->getCurrentDirective();
OpenMPDirectiveKind CaptureRegion = getOpenMPCaptureRegionForClause(
DKind, OMPC_thread_limit, getLangOpts().OpenMP);
if (CaptureRegion == OMPD_unknown || SemaRef.CurContext->isDependentContext())
return OMPThreadLimitClause::Create(getASTContext(), CaptureRegion,
StartLoc, LParenLoc, EndLoc, VarList,
+ Modifier, ModifierExpr, ModifierLoc,
/*PreInit=*/nullptr);
llvm::MapVector<const Expr *, DeclRefExpr *> Captures;
@@ -24520,9 +24622,15 @@ OMPClause *SemaOpenMP::ActOnOpenMPThreadLimitClause(ArrayRef<Expr *> VarList,
Vars.push_back(ValExpr);
}
+ if (ModifierExpr) {
+ ModifierExpr = SemaRef.MakeFullExpr(ModifierExpr).get();
+ ModifierExpr = tryBuildCapture(SemaRef, ModifierExpr, Captures).get();
+ }
+
Stmt *PreInit = buildPreInits(getASTContext(), Captures);
return OMPThreadLimitClause::Create(getASTContext(), CaptureRegion, StartLoc,
- LParenLoc, EndLoc, Vars, PreInit);
+ LParenLoc, EndLoc, Vars, Modifier,
+ ModifierExpr, ModifierLoc, PreInit);
}
OMPClause *SemaOpenMP::ActOnOpenMPPriorityClause(Expr *Priority,
diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 3c8fcbe582b43..92df2e622a37c 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -2146,23 +2146,26 @@ class TreeTransform {
/// Subclasses may override this routine to provide different behavior.
OMPClause *RebuildOMPNumTeamsClause(
ArrayRef<Expr *> VarList, OpenMPNumTeamsClauseModifier Modifier,
- Expr *ModifierExpr, SourceLocation ModifierLoc, SourceLocation StartLoc,
+ Expr *ModifierExpr, SourceLocation ModifierLoc,
+ OpenMPNumTeamsClauseModifier ModifierExtra, Expr *ModifierExtraExpr,
+ SourceLocation ModifierExtraLoc, SourceLocation StartLoc,
SourceLocation LParenLoc, SourceLocation EndLoc) {
return getSema().OpenMP().ActOnOpenMPNumTeamsClause(
- VarList, Modifier, ModifierExpr, ModifierLoc, StartLoc, LParenLoc,
- EndLoc);
+ VarList, Modifier, ModifierExpr, ModifierLoc, ModifierExtra,
+ ModifierExtraExpr, ModifierExtraLoc, StartLoc, LParenLoc, EndLoc);
}
/// Build a new OpenMP 'thread_limit' clause.
///
/// By default, performs semantic analysis to build the new statement.
/// Subclasses may override this routine to provide different behavior.
- OMPClause *RebuildOMPThreadLimitClause(ArrayRef<Expr *> VarList,
- SourceLocation StartLoc,
- SourceLocation LParenLoc,
- SourceLocation EndLoc) {
- return getSema().OpenMP().ActOnOpenMPThreadLimitClause(VarList, StartLoc,
- LParenLoc, EndLoc);
+ OMPClause *RebuildOMPThreadLimitClause(
+ ArrayRef<Expr *> VarList, OpenMPThreadLimitClauseModifier Modifier,
+ Expr *ModifierExpr, SourceLocation ModifierLoc, SourceLocation StartLoc,
+ SourceLocation LParenLoc, SourceLocation EndLoc) {
+ return getSema().OpenMP().ActOnOpenMPThreadLimitClause(
+ VarList, Modifier, ModifierExpr, ModifierLoc, StartLoc, LParenLoc,
+ EndLoc);
}
/// Build a new OpenMP 'priority' clause.
@@ -11611,7 +11614,8 @@ TreeTransform<Derived>::TransformOMPNumTeamsClause(OMPNumTeamsClause *C) {
}
return getDerived().RebuildOMPNumTeamsClause(
Vars, C->getModifier(), ModifierExpr, C->getModifierLoc(),
- C->getBeginLoc(), C->getLParenLoc(), C->getEndLoc());
+ OMPC_NUMTEAMS_unknown, nullptr, SourceLocation(), C->getBeginLoc(),
+ C->getLParenLoc(), C->getEndLoc());
}
template <typename Derived>
@@ -11625,8 +11629,16 @@ TreeTransform<Derived>::TransformOMPThreadLimitClause(OMPThreadLimitClause *C) {
return nullptr;
Vars.push_back(EVar.get());
}
+ Expr *ModifierExpr = C->getModifierExpr();
+ if (ModifierExpr) {
+ ExprResult EVar = getDerived().TransformExpr(cast<Expr>(ModifierExpr));
+ if (EVar.isInvalid())
+ return nullptr;
+ ModifierExpr = EVar.get();
+ }
return getDerived().RebuildOMPThreadLimitClause(
- Vars, C->getBeginLoc(), C->getLParenLoc(), C->getEndLoc());
+ Vars, C->getModifier(), ModifierExpr, C->getModifierLoc(),
+ C->getBeginLoc(), C->getLParenLoc(), C->getEndLoc());
}
template <typename Derived>
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index de1287bbec7d4..6ad2ca258d794 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -12611,6 +12611,9 @@ void OMPClauseReader::VisitOMPNumTeamsClause(OMPNumTeamsClause *C) {
}
void OMPClauseReader::VisitOMPThreadLimitClause(OMPThreadLimitClause *C) {
+ C->setModifier(Record.readEnum<OpenMPThreadLimitClauseModifier>());
+ C->setModifierLoc(Record.readSourceLocation());
+ C->setModifierExpr(Record.readSubExpr());
VisitOMPClauseWithPreInit(C);
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index ecf935e3b3548..a305e92b6a602 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -8599,6 +8599,9 @@ void OMPClauseWriter::VisitOMPNumTeamsClause(OMPNumTeamsClause *C) {
void OMPClauseWriter::VisitOMPThreadLimitClause(OMPThreadLimitClause *C) {
Record.push_back(C->varlist_size());
+ Record.writeEnum(C->getModifier());
+ Record.AddSourceLocation(C->getModifierLoc());
+ Record.AddStmt(C->getModifierExpr());
VisitOMPClauseWithPreInit(C);
Record.AddSourceLocation(C->getLParenLoc());
for (auto *VE : C->varlist())
diff --git a/clang/test/OpenMP/dims_modifier_ast_print.cpp b/clang/test/OpenMP/dims_modifier_ast_print.cpp
new file mode 100644
index 0000000000000..d47e8353abcad
--- /dev/null
+++ b/clang/test/OpenMP/dims_modifier_ast_print.cpp
@@ -0,0 +1,40 @@
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=61 -ast-print %s | FileCheck %s
+// expected-no-diagnostics
+
+void test_ast_print() {
+ int N = 10;
+ int M = 20;
+ constexpr int D = 3;
+
+ // CHECK: #pragma omp target teams num_teams(dims(3):1,2,3) thread_limit(dims(2):10,20)
+ #pragma omp target teams num_teams(dims(3): 1, 2, 3) thread_limit(dims(2): 10, 20)
+ {}
+
+ // CHECK: #pragma omp target teams num_teams(dims(D):1,2,3) thread_limit(dims(D):10,20,30)
+ #pragma omp target teams num_teams(dims(D): 1, 2, 3) thread_limit(dims(D): 10, 20, 30)
+ {}
+
+ // CHECK: #pragma omp target teams num_teams(dims(2):N,N + 1) thread_limit(dims(1):M)
+ #pragma omp target teams num_teams(dims(2): N, N + 1) thread_limit(dims(1): M)
+ {}
+
+ // CHECK: #pragma omp target teams num_teams(dims(1):N) thread_limit(dims(1):M)
+ #pragma omp target teams num_teams(dims(1): N) thread_limit(dims(1): M)
+ {}
+}
+
+template <int D>
+void template_test() {
+ int arr[3] = {1, 2, 3};
+ // CHECK: #pragma omp target teams num_teams(dims(3):arr[0],arr[1],arr[2]) thread_limit(dims(1):3)
+ #pragma omp target teams num_teams(dims(3): arr[0], arr[1], arr[2]) thread_limit(dims(1): D)
+ {}
+
+ // CHECK: #pragma omp target teams num_teams(dims(3):arr[0],arr[1],arr[2]) thread_limit(dims(2):3,arr[0])
+ #pragma omp target teams num_teams(dims(D): arr[0], arr[1], arr[2]) thread_limit(dims(2): D, arr[0])
+ {}
+}
+
+void call_templates() {
+ template_test<3>();
+}
diff --git a/clang/test/OpenMP/dims_modifier_messages.cpp b/clang/test/OpenMP/dims_modifier_messages.cpp
new file mode 100644
index 0000000000000..ce0dd7eb79c52
--- /dev/null
+++ b/clang/test/OpenMP/dims_modifier_messages.cpp
@@ -0,0 +1,129 @@
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=61 -triple x86_64-unknown-unknown %s
+// RUN: %clang_cc1 -verify -fopenmp-simd -fopenmp-version=61 -triple x86_64-unknown-unknown %s
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=61 -triple x86_64-unknown-unknown -fopenmp-targets=nvptx64 %s
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=61 -triple x86_64-unknown-unknown -fopenmp-targets=amdgcn-amd-amdhsa %s
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=52 -triple x86_64-unknown-unknown -DVERSION52 %s
+
+void foo() {
+}
+
+#ifndef VERSION52
+void bar(int N) { // expected-note {{declared here}}
+ // 1. Invalid syntax of the dims modifier.
+
+#pragma omp target teams num_teams(dims 2: 4) // expected-error {{use of undeclared identifier 'dims'}}
+ foo();
+
+#pragma omp target thread_limit(dim(2) 4, 5)
+ // expected-error at -1 {{use of undeclared identifier 'dim'}}
+ // expected-error at -2 {{expected ',' or ')' in 'thread_limit' clause}}
+ foo();
+
+#pragma omp target thread_limit(dims((2): 4, 5)
+ // expected-error at -1 {{expected ')'}}
+ // expected-error at -2 {{expected ')'}}
+ // expected-note at -3 {{to match this '('}}
+ // expected-note at -4 {{to match this '('}}
+ // expected-error at -5 {{missing ':' after thread_limit modifier}}
+ foo();
+
+#pragma omp target thread_limit(dims(2)): 4, 5)
+ // expected-error at -1 {{missing ':' after thread_limit modifier}}
+ // expected-warning at -2 {{extra tokens at the end of '#pragma omp target' are ignored}}
+ foo();
+
+#pragma omp target thread_limit(dims(2) 4, 5) // expected-error {{missing ':' after thread_limit modifier}}
+ foo();
+
+#pragma omp target teams distribute num_teams(dims(): 4) // expected-error {{expected expression}}
+ for (int i = 0; i < 10; ++i) {}
+
+ // 3. Incompatible modifiers.
+
+#pragma omp target teams num_teams(dims(1),10:20) // expected-error {{'lower_bound' modifier cannot be specified with 'dims' modifier in 'num_teams' clause}}
+ foo();
+
+ // 2. Mismatching number of expressions.
+
+#pragma omp target teams num_teams(dims(2): 4) // expected-error {{unexpected number of expressions in 'num_teams' clause}}
+ foo();
+
+#pragma omp target thread_limit(dims(1): 4, 5) // expected-error {{unexpected number of expressions in 'thread_limit' clause}}
+ foo();
+
+#pragma omp target teams distribute num_teams(dims(3): 4, 5) // expected-error {{unexpected number of expressions in 'num_teams' clause}}
+ for (int i = 0; i < 10; ++i) {}
+
+ // 3. Exceeding three dimensions.
+
+#pragma omp target teams num_teams(dims(4): 1, 2, 3, 4) // expected-error {{maximum three expressions are supported in 'num_teams' clause}}
+ foo();
+
+#pragma omp target thread_limit(dims(2): 1, 2, 3, 4) // expected-error {{unexpected number of expressions in 'thread_limit' clause}}
+ foo();
+
+#pragma omp target teams distribute thread_limit(dims(4): 1, 2, 3, 4) // expected-error {{maximum three expressions are supported in 'thread_limit' clause}}
+ for (int i = 0; i < 10; ++i) {}
+
+ // 4. Invalid use of dims when ompx_bare is present.
+
+#pragma omp target teams ompx_bare num_teams(dims(2): 1, 2) thread_limit(1, 2, 3) // expected-error {{'ompx_bare' clause cannot be specified with 'dims' modifier in 'num_teams' and 'thread_limit' clauses}}
+ foo();
+
+#pragma omp target teams ompx_bare num_teams(1, 2, 3) thread_limit(dims(3): 1, 2, 3) // expected-error {{'ompx_bare' clause cannot be specified with 'dims' modifier in 'num_teams' and 'thread_limit' clauses}}
+ foo();
+
+ // 5. Number of dimensions in dims is invalid.
+
+#pragma omp target teams num_teams(dims(N): 1, 2)
+ // expected-error at -1 {{expression is not an integral constant expression}}
+ // expected-note at -2 {{function parameter 'N' with unknown value cannot be used in a constant expression}}
+ foo();
+
+#pragma omp target thread_limit(dims(2.5): 1, 2) // expected-error {{integral constant expression must have integral or unscoped enumeration type, not 'double'}}
+ foo();
+
+#pragma omp target teams distribute num_teams(dims(0): 4) // expected-error {{argument to 'num_teams' clause must be a strictly positive integer value}}
+ for (int i = 0; i < 10; ++i) {}
+
+#pragma omp target teams thread_limit(dims(-1): 4) // expected-error {{argument to 'thread_limit' clause must be a strictly positive integer value}}
+ foo();
+}
+
+template <int D>
+void template_test() {
+ // 7. Mismatching number of expressions with template arguments.
+
+#pragma omp target teams num_teams(dims(D): 4)
+ // expected-error at -1 {{unexpected number of expressions in 'num_teams' clause}}
+ // expected-error at -2 {{argument to 'num_teams' clause must be a strictly positive integer value}}
+ foo();
+
+#pragma omp target thread_limit(dims(D): 4, 5)
+ // expected-error at -1 {{unexpected number of expressions in 'thread_limit' clause}}
+ // expected-error at -2 {{argument to 'thread_limit' clause must be a strictly positive integer value}}
+ foo();
+
+#pragma omp target teams distribute num_teams(dims(D): 4, 5)
+ // expected-error at -1 {{unexpected number of expressions in 'num_teams' clause}}
+ // expected-error at -2 {{argument to 'num_teams' clause must be a strictly positive integer value}}
+ for (int i = 0; i < 10; ++i) {}
+}
+
+void call_templates() {
+ template_test<3>(); // expected-note {{in instantiation of function template specialization 'template_test<3>' requested here}}
+ template_test<0>(); // expected-note {{in instantiation of function template specialization 'template_test<0>' requested here}}
+}
+#endif
+
+#ifdef VERSION52
+void version() {
+ // 6. Dims modifier requires OpenMP 6.1.
+
+#pragma omp target teams num_teams(dims(1): 4) // expected-error {{'dims' modifier in 'num_teams' clause requires OpenMP 6.1 or later}}
+ foo();
+
+#pragma omp target thread_limit(dims(1): 4) // expected-error {{'dims' modifier in 'thread_limit' clause requires OpenMP 6.1 or later}}
+ foo();
+}
+#endif
diff --git a/clang/test/OpenMP/ompx_bare_messages.c b/clang/test/OpenMP/ompx_bare_messages.c
index 19ceee5625fee..0fd931954c475 100644
--- a/clang/test/OpenMP/ompx_bare_messages.c
+++ b/clang/test/OpenMP/ompx_bare_messages.c
@@ -19,6 +19,6 @@ void bar() {
#pragma omp teams ompx_bare // expected-error {{unexpected OpenMP clause 'ompx_bare' in directive '#pragma omp teams'}} expected-note {{OpenMP extension clause 'ompx_bare' only allowed with '#pragma omp target teams'}}
foo();
-#pragma omp target teams ompx_bare // expected-error {{'ompx_bare' clauses requires explicit grid size via 'num_teams' and 'thread_limit' clauses}}
+#pragma omp target teams ompx_bare // expected-error {{'ompx_bare' clause requires explicit grid size via 'num_teams' and 'thread_limit' clauses}}
foo();
}
diff --git a/clang/test/OpenMP/target_teams_distribute_num_teams_messages.cpp b/clang/test/OpenMP/target_teams_distribute_num_teams_messages.cpp
index 8bf388f0b5da9..0fc2f3ff54017 100644
--- a/clang/test/OpenMP/target_teams_distribute_num_teams_messages.cpp
+++ b/clang/test/OpenMP/target_teams_distribute_num_teams_messages.cpp
@@ -44,10 +44,10 @@ T tmain(T argc) {
#pragma omp target teams distribute num_teams(3.14) // expected-error 2 {{expression must have integral or unscoped enumeration type, not 'double'}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute num_teams(1, 2, 3) // expected-error {{only one expression allowed in 'num_teams' clause}}
+#pragma omp target teams distribute num_teams(1, 2, 3) // expected-error {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute thread_limit(1, 2, 3) // expected-error {{only one expression allowed in 'thread_limit' clause}}
+#pragma omp target teams distribute thread_limit(1, 2, 3) // expected-error {{unexpected number of expressions in 'thread_limit' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
#pragma omp target teams ompx_bare num_teams(1, 2, 3, 4) thread_limit(1) // expected-error {{at most three expressions are allowed in 'num_teams' clause in 'target teams ompx_bare' construct}}
@@ -97,10 +97,10 @@ int main(int argc, char **argv) {
#pragma omp target teams distribute num_teams (3.14) // expected-error {{expression must have integral or unscoped enumeration type, not 'double'}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute num_teams(1, 2, 3) // expected-error {{only one expression allowed in 'num_teams' clause}}
+#pragma omp target teams distribute num_teams(1, 2, 3) // expected-error {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute thread_limit(1, 2, 3) // expected-error {{only one expression allowed in 'thread_limit' clause}}
+#pragma omp target teams distribute thread_limit(1, 2, 3) // expected-error {{unexpected number of expressions in 'thread_limit' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
#pragma omp target teams ompx_bare num_teams(1, 2, 3, 4) thread_limit(1) // expected-error {{at most three expressions are allowed in 'num_teams' clause in 'target teams ompx_bare' construct}}
diff --git a/clang/test/OpenMP/target_teams_distribute_parallel_for_num_teams_messages.cpp b/clang/test/OpenMP/target_teams_distribute_parallel_for_num_teams_messages.cpp
index 092e0137d250d..4d72a2c23bb28 100644
--- a/clang/test/OpenMP/target_teams_distribute_parallel_for_num_teams_messages.cpp
+++ b/clang/test/OpenMP/target_teams_distribute_parallel_for_num_teams_messages.cpp
@@ -43,9 +43,9 @@ T tmain(T argc) {
for (int i=0; i<100; i++) foo();
#pragma omp target teams distribute parallel for num_teams(3.14) // expected-error 2 {{expression must have integral or unscoped enumeration type, not 'double'}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute parallel for num_teams(1, 2, 3) // expected-error {{only one expression allowed in 'num_teams' clause}}
+#pragma omp target teams distribute parallel for num_teams(1, 2, 3) // expected-error {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute parallel for thread_limit(1, 2, 3) // expected-error {{only one expression allowed in 'thread_limit' clause}}
+#pragma omp target teams distribute parallel for thread_limit(1, 2, 3) // expected-error {{unexpected number of expressions in 'thread_limit' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
return 0;
@@ -89,10 +89,10 @@ int main(int argc, char **argv) {
#pragma omp target teams distribute parallel for num_teams (3.14) // expected-error {{expression must have integral or unscoped enumeration type, not 'double'}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute parallel for num_teams(1, 2, 3) // expected-error {{only one expression allowed in 'num_teams' clause}}
+#pragma omp target teams distribute parallel for num_teams(1, 2, 3) // expected-error {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
-#pragma omp target teams distribute parallel for thread_limit(1, 2, 3) // expected-error {{only one expression allowed in 'thread_limit' clause}}
+#pragma omp target teams distribute parallel for thread_limit(1, 2, 3) // expected-error {{unexpected number of expressions in 'thread_limit' clause (expected 1, have 3)}}
for (int i=0; i<100; i++) foo();
return tmain<int, 10>(argc); // expected-note {{in instantiation of function template specialization 'tmain<int, 10>' requested here}}
diff --git a/clang/test/OpenMP/teams_num_teams_messages.cpp b/clang/test/OpenMP/teams_num_teams_messages.cpp
index 683a772295cdf..92c85ac3d710b 100644
--- a/clang/test/OpenMP/teams_num_teams_messages.cpp
+++ b/clang/test/OpenMP/teams_num_teams_messages.cpp
@@ -61,10 +61,10 @@ T tmain(T argc) {
#pragma omp teams num_teams(3.14) // expected-error 2 {{expression must have integral or unscoped enumeration type, not 'double'}}
foo();
#pragma omp target
-#pragma omp teams num_teams (1, 2, 3) // expected-error {{only one expression allowed in 'num_teams' clause}}
+#pragma omp teams num_teams (1, 2, 3) // expected-error {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
foo();
#pragma omp target
-#pragma omp teams thread_limit(1, 2, 3) // expected-error {{only one expression allowed in 'thread_limit' clause}}
+#pragma omp teams thread_limit(1, 2, 3) // expected-error {{unexpected number of expressions in 'thread_limit' clause (expected 1, have 3)}}
foo();
return 0;
@@ -121,11 +121,11 @@ int main(int argc, char **argv) {
foo();
#pragma omp target
-#pragma omp teams num_teams (1, 2, 3) // expected-error {{only one expression allowed in 'num_teams' clause}}
+#pragma omp teams num_teams (1, 2, 3) // expected-error {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
foo();
#pragma omp target
-#pragma omp teams thread_limit(1, 2, 3) // expected-error {{only one expression allowed in 'thread_limit' clause}}
+#pragma omp teams thread_limit(1, 2, 3) // expected-error {{unexpected number of expressions in 'thread_limit' clause (expected 1, have 3)}}
foo();
return tmain<int, 10>(argc); // expected-note {{in instantiation of function template specialization 'tmain<int, 10>' requested here}}
@@ -135,28 +135,28 @@ int main(int argc, char **argv) {
void test_invalid_syntax() {
int a = 1, b = 2, c = 3;
- // expected-error at +1 {{only one expression allowed in 'num_teams' clause}}
+ // expected-error at +1 {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
#pragma omp teams num_teams(a, b, c)
{ }
// expected-error at +1 {{lower bound is greater than upper bound in 'num_teams' clause}}
#pragma omp teams num_teams(10:5)
{ }
- // expected-error at +1 {{only one expression allowed in 'num_teams' clause}}
+ // expected-error at +1 {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
#pragma omp target teams num_teams(a, b, c)
{ }
// expected-error at +1 {{lower bound is greater than upper bound in 'num_teams' clause}}
#pragma omp target teams num_teams(8:3)
{ }
- // expected-error at +1 {{only one expression allowed in 'num_teams' clause}}
+ // expected-error at +1 {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
#pragma omp target teams distribute num_teams(a, b, c)
for (int i = 0; i < 100; ++i) { }
// expected-error at +1 {{lower bound is greater than upper bound in 'num_teams' clause}}
#pragma omp target teams distribute num_teams(15:7)
for (int i = 0; i < 100; ++i) { }
- // expected-error at +1 {{only one expression allowed in 'num_teams' clause}}
+ // expected-error at +1 {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
#pragma omp target teams distribute parallel for num_teams(a, b, c)
for (int i = 0; i < 100; ++i) { }
// expected-error at +1 {{lower bound is greater than upper bound in 'num_teams' clause}}
@@ -164,14 +164,14 @@ void test_invalid_syntax() {
for (int i = 0; i < 100; ++i) { }
// Test target teams distribute parallel for simd directive
- // expected-error at +1 {{only one expression allowed in 'num_teams' clause}}
+ // expected-error at +1 {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
#pragma omp target teams distribute parallel for simd num_teams(a, b, c)
for (int i = 0; i < 100; ++i) { }
// expected-error at +1 {{lower bound is greater than upper bound in 'num_teams' clause}}
#pragma omp target teams distribute parallel for simd num_teams(20:6)
for (int i = 0; i < 100; ++i) { }
- // expected-error at +1 {{only one expression allowed in 'num_teams' clause}}
+ // expected-error at +1 {{unexpected number of expressions in 'num_teams' clause (expected 1, have 3)}}
#pragma omp target teams distribute simd num_teams(a, b, c)
for (int i = 0; i < 100; ++i) { }
// expected-error at +1 {{lower bound is greater than upper bound in 'num_teams' clause}}
diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 0dbf315166696..af9dc02656597 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -2533,6 +2533,8 @@ void OMPClauseEnqueue::VisitOMPNumTeamsClause(const OMPNumTeamsClause *C) {
void OMPClauseEnqueue::VisitOMPThreadLimitClause(
const OMPThreadLimitClause *C) {
+ if (const Expr *Modifier = C->getModifierExpr())
+ Visitor->AddStmt(Modifier);
VisitOMPClauseList(C);
VisitOMPClauseWithPreInit(C);
}
>From fda7c8b5a7c21c0105189298f3f237e31567a6ff Mon Sep 17 00:00:00 2001
From: Kevin Sala <salapenades1 at llnl.gov>
Date: Wed, 8 Jul 2026 13:24:04 -0700
Subject: [PATCH 2/3] Improvements and review fixes
---
clang/docs/OpenMPSupport.md | 18 ++---
clang/docs/ReleaseNotes.md | 2 +
clang/include/clang/AST/RecursiveASTVisitor.h | 2 +
clang/lib/Sema/SemaOpenMP.cpp | 69 +++++++++++--------
4 files changed, 52 insertions(+), 39 deletions(-)
diff --git a/clang/docs/OpenMPSupport.md b/clang/docs/OpenMPSupport.md
index 56ddbbd8c5f12..86ec77ecc0146 100644
--- a/clang/docs/OpenMPSupport.md
+++ b/clang/docs/OpenMPSupport.md
@@ -381,15 +381,15 @@ Please post on the [Discourse forums (Runtimes - OpenMP category)] for more
information or if you want to help with the
implementation.
-| Feature | C/C++ Status | Fortran Status | Reviews |
-| --------------------------------------------------------------------- | ------------------- | ------------------- | -------------------------------------------------------------------------------------------------------- |
-| dyn_groupprivate clause | {part}`partial` | {part}`In Progress` | C/C++: Host device support missing |
-| loop flatten transformation | {none}`unclaimed` | {none}`unclaimed` | |
-| loop grid/tile modifiers for sizes clause | {none}`unclaimed` | {none}`unclaimed` | |
-| attach map-type modifier | {part}`In Progress` | {none}`unclaimed` | C/C++: @abhinavgaba; RT: @abhinavgaba ([PR149036][PR149036], [PR158370][PR158370]) |
-| need_device_ptr modifier for adjust_args clause | {part}`partial` | {none}`unclaimed` | Clang Parsing/Sema: [PR168905][PR168905] [PR169558][PR169558] |
-| fallback modifier for use_device_ptr clause | {good}`done` | {none}`unclaimed` | Clang: @abhinavgaba ([PR170578][PR170578], [PR173931][PR173931]) RT: @abhinavgaba ([PR169603][PR169603]) |
-| dims clause with strict behavior (multidimensional teams and leagues) | {part}`In Progress` | {part}`In Progress` | C/C++: kevinsala Fortran: skc7, kparzysz, mjklemm |
+| Feature | C/C++ Status | Fortran Status | Reviews |
+| ----------------------------------------------------------------------------------------------- | ------------------- | ------------------- | -------------------------------------------------------------------------------------------------------- |
+| dyn_groupprivate clause | {part}`partial` | {part}`In Progress` | C/C++: Host device support missing |
+| loop flatten transformation | {none}`unclaimed` | {none}`unclaimed` | |
+| loop grid/tile modifiers for sizes clause | {none}`unclaimed` | {none}`unclaimed` | |
+| attach map-type modifier | {part}`In Progress` | {none}`unclaimed` | C/C++: @abhinavgaba; RT: @abhinavgaba ([PR149036][PR149036], [PR158370][PR158370]) |
+| need_device_ptr modifier for adjust_args clause | {part}`partial` | {none}`unclaimed` | Clang Parsing/Sema: [PR168905][PR168905] [PR169558][PR169558] |
+| fallback modifier for use_device_ptr clause | {good}`done` | {none}`unclaimed` | Clang: @abhinavgaba ([PR170578][PR170578], [PR173931][PR173931]) RT: @abhinavgaba ([PR169603][PR169603]) |
+| dims modifier for num_teams, thread_limit, and num_threads (multidimensional teams and leagues) | {part}`partial` | {part}`In Progress` | C/C++: @kevinsala ([PR206412]); Fortran: @skc7, @kparzysz, @mjklemm |
## OpenMP Extensions
diff --git a/clang/docs/ReleaseNotes.md b/clang/docs/ReleaseNotes.md
index 696aed167e621..a943cd78d71e1 100644
--- a/clang/docs/ReleaseNotes.md
+++ b/clang/docs/ReleaseNotes.md
@@ -1211,6 +1211,8 @@ latest release, please see the [Clang Web Site](https://clang.llvm.org) or the
(e.g. `std::complex`). The private copy is now initialized to the
multiplicative identity instead of being value-initialized, which previously
produced a wrong result (the product collapsed to the additive identity).
+- Added parsing and semantic support for `dims` modifier in `num_teams` and
+ `thread_limit` clauses when OpenMP >= 61.
### SYCL Support
diff --git a/clang/include/clang/AST/RecursiveASTVisitor.h b/clang/include/clang/AST/RecursiveASTVisitor.h
index b77443f1fa0ab..84aaac71746ed 100644
--- a/clang/include/clang/AST/RecursiveASTVisitor.h
+++ b/clang/include/clang/AST/RecursiveASTVisitor.h
@@ -4082,6 +4082,8 @@ bool RecursiveASTVisitor<Derived>::VisitOMPNumTeamsClause(
template <typename Derived>
bool RecursiveASTVisitor<Derived>::VisitOMPThreadLimitClause(
OMPThreadLimitClause *C) {
+ if (auto *E = C->getModifierExpr())
+ TRY_TO(VisitStmt(E));
TRY_TO(VisitOMPClauseList(C));
TRY_TO(VisitOMPClauseWithPreInit(C));
return true;
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 96da4f7a9258d..f961c2887d9ed 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -13623,20 +13623,18 @@ StmtResult SemaOpenMP::ActOnOpenMPTargetUpdateDirective(
/// Check the number of expressions specified in a multidimensional clause and
/// return whether an error was encountered.
-template <typename ClauseT>
-static bool checkExprsInMultidimClause(SemaBase &SemaRef, const ClauseT *Clause,
- const OMPXBareClause *BareClause) {
- if (!Clause)
- return false;
-
- const uint64_t NumVars = Clause->getVarRefs().size();
+static bool validateMultidimClauseExprs(
+ SemaBase &SemaRef, OpenMPClauseKind ClauseKind,
+ SourceLocation ClauseBeginLoc, ArrayRef<const Expr *> ClauseVarList,
+ const Expr *DimsModifierExpr, const OMPXBareClause *BareClause = nullptr) {
+ const uint64_t NumVars = ClauseVarList.size();
// The ompx_bare clause allows up to three expressions.
if (BareClause) {
if (NumVars > 3) {
- SemaRef.Diag(Clause->getBeginLoc(),
+ SemaRef.Diag(ClauseBeginLoc,
diag::err_ompx_more_than_three_expr_not_allowed)
- << getOpenMPClauseName(Clause->getClauseKind());
+ << getOpenMPClauseName(ClauseKind);
return true;
}
return false;
@@ -13644,37 +13642,48 @@ static bool checkExprsInMultidimClause(SemaBase &SemaRef, const ClauseT *Clause,
// By default, only one expression accepted.
uint64_t MaxExprs = 1;
-
- const Expr *DimsExpr = Clause->getDimsModifierExpr();
- if (DimsExpr) {
+ if (DimsModifierExpr) {
// Cannot verify the expected size yet.
- if (DimsExpr->isInstantiationDependent())
+ if (DimsModifierExpr->isInstantiationDependent())
return false;
// The dims modifier determines the exact number of expressions.
- MaxExprs =
- DimsExpr->EvaluateKnownConstInt(SemaRef.getASTContext()).getExtValue();
+ MaxExprs = DimsModifierExpr->EvaluateKnownConstInt(SemaRef.getASTContext())
+ .getExtValue();
}
if (NumVars != MaxExprs) {
- SemaRef.Diag(Clause->getBeginLoc(), diag::err_omp_unexpected_num_exprs)
- << getOpenMPClauseName(Clause->getClauseKind()) << MaxExprs << NumVars;
+ SemaRef.Diag(ClauseBeginLoc, diag::err_omp_unexpected_num_exprs)
+ << getOpenMPClauseName(ClauseKind) << MaxExprs << NumVars;
return true;
}
if (NumVars > 3) {
- SemaRef.Diag(Clause->getBeginLoc(), diag::err_omp_max_three_exprs)
- << getOpenMPClauseName(Clause->getClauseKind());
+ SemaRef.Diag(ClauseBeginLoc, diag::err_omp_max_three_exprs)
+ << getOpenMPClauseName(ClauseKind);
return true;
}
return false;
}
+/// Check the number of expressions specified in a multidimensional clause and
+/// return whether an error was encountered.
+template <typename ClauseT>
+static bool validateMultidimClauseExprs(SemaBase &SemaRef,
+ const ClauseT *Clause,
+ const OMPXBareClause *BareClause) {
+ if (!Clause)
+ return false;
+ return validateMultidimClauseExprs(
+ SemaRef, Clause->getClauseKind(), Clause->getBeginLoc(),
+ Clause->getVarRefs(), Clause->getDimsModifierExpr(), BareClause);
+}
+
/// Check the number of expressions specified in clauses that can contain
/// multidimensional values, e.g., num_teams and thread_limit. The function
/// returns true on error.
-static bool checkMultidimClauses(SemaBase &SemaRef,
- ArrayRef<OMPClause *> Clauses,
- bool MayHaveBareClause = false) {
+static bool validateMultidimClauses(SemaBase &SemaRef,
+ ArrayRef<OMPClause *> Clauses,
+ bool MayHaveBareClause = false) {
auto BareClauseIt =
MayHaveBareClause ? llvm::find_if(Clauses, llvm::IsaPred<OMPXBareClause>)
: Clauses.end();
@@ -13704,8 +13713,8 @@ static bool checkMultidimClauses(SemaBase &SemaRef,
return true;
}
}
- return checkExprsInMultidimClause(SemaRef, ThreadLimitClause, BareClause) ||
- checkExprsInMultidimClause(SemaRef, NumTeamsClause, BareClause);
+ return validateMultidimClauseExprs(SemaRef, ThreadLimitClause, BareClause) ||
+ validateMultidimClauseExprs(SemaRef, NumTeamsClause, BareClause);
}
StmtResult SemaOpenMP::ActOnOpenMPTeamsDirective(ArrayRef<OMPClause *> Clauses,
@@ -13715,7 +13724,7 @@ StmtResult SemaOpenMP::ActOnOpenMPTeamsDirective(ArrayRef<OMPClause *> Clauses,
if (!AStmt)
return StmtError();
- if (checkMultidimClauses(*this, Clauses))
+ if (validateMultidimClauses(*this, Clauses))
return StmtError();
// Report affected OpenMP target offloading behavior when in HIP lang-mode.
@@ -14479,7 +14488,7 @@ StmtResult SemaOpenMP::ActOnOpenMPTargetTeamsDirective(
setBranchProtectedScope(SemaRef, OMPD_target_teams, AStmt);
- if (checkMultidimClauses(*this, Clauses, /*MayHaveBareClause=*/true))
+ if (validateMultidimClauses(*this, Clauses, /*MayHaveBareClause=*/true))
return StmtError();
return OMPTargetTeamsDirective::Create(getASTContext(), StartLoc, EndLoc,
@@ -14492,7 +14501,7 @@ StmtResult SemaOpenMP::ActOnOpenMPTargetTeamsDistributeDirective(
if (!AStmt)
return StmtError();
- if (checkMultidimClauses(*this, Clauses))
+ if (validateMultidimClauses(*this, Clauses))
return StmtError();
CapturedStmt *CS =
@@ -14521,7 +14530,7 @@ StmtResult SemaOpenMP::ActOnOpenMPTargetTeamsDistributeParallelForDirective(
if (!AStmt)
return StmtError();
- if (checkMultidimClauses(*this, Clauses))
+ if (validateMultidimClauses(*this, Clauses))
return StmtError();
CapturedStmt *CS = setBranchProtectedScope(
@@ -14551,7 +14560,7 @@ StmtResult SemaOpenMP::ActOnOpenMPTargetTeamsDistributeParallelForSimdDirective(
if (!AStmt)
return StmtError();
- if (checkMultidimClauses(*this, Clauses))
+ if (validateMultidimClauses(*this, Clauses))
return StmtError();
CapturedStmt *CS = setBranchProtectedScope(
@@ -14584,7 +14593,7 @@ StmtResult SemaOpenMP::ActOnOpenMPTargetTeamsDistributeSimdDirective(
if (!AStmt)
return StmtError();
- if (checkMultidimClauses(*this, Clauses))
+ if (validateMultidimClauses(*this, Clauses))
return StmtError();
CapturedStmt *CS = setBranchProtectedScope(
>From dd804821bd56aa5a311d16d571d194c836ca6e98 Mon Sep 17 00:00:00 2001
From: Kevin Sala <salapenades1 at llnl.gov>
Date: Thu, 9 Jul 2026 11:34:51 -0700
Subject: [PATCH 3/3] Fix review comments
---
clang/lib/Basic/OpenMPKinds.cpp | 2 ++
clang/lib/Parse/ParseOpenMP.cpp | 7 +++++--
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/clang/lib/Basic/OpenMPKinds.cpp b/clang/lib/Basic/OpenMPKinds.cpp
index 890ed0d29a7c6..5dd2a728ee1cd 100644
--- a/clang/lib/Basic/OpenMPKinds.cpp
+++ b/clang/lib/Basic/OpenMPKinds.cpp
@@ -222,6 +222,8 @@ unsigned clang::getOpenMPSimpleClauseType(OpenMPClauseKind Kind, StringRef Str,
.Default(OMPC_NUMTEAMS_unknown);
if (LangOpts.OpenMP < 51)
return OMPC_NUMTEAMS_unknown;
+ if (Type == OMPC_NUMTEAMS_dims && LangOpts.OpenMP < 61)
+ return OMPC_NUMTEAMS_unknown;
return Type;
}
case OMPC_thread_limit: {
diff --git a/clang/lib/Parse/ParseOpenMP.cpp b/clang/lib/Parse/ParseOpenMP.cpp
index 7ef1e4211a1ef..716067f36f6d2 100644
--- a/clang/lib/Parse/ParseOpenMP.cpp
+++ b/clang/lib/Parse/ParseOpenMP.cpp
@@ -5298,7 +5298,7 @@ bool Parser::ParseOpenMPVarList(OpenMPDirectiveKind DKind,
: static_cast<int>(OMPC_THREADLIMIT_unknown);
// Lower-bound modifier is only accepted in num_teams.
- bool CanParseLowerBoundModifier = (Kind == OMPC_num_teams);
+ const bool CanParseLowerBoundModifier = (Kind == OMPC_num_teams);
if (Tok.is(tok::identifier) && Tok.getIdentifierInfo()->isStr("dims") &&
NextToken().is(tok::l_paren)) {
SourceLocation TLoc = Tok.getLocation();
@@ -5314,9 +5314,12 @@ bool Parser::ParseOpenMPVarList(OpenMPDirectiveKind DKind,
++Mod;
}
- CanParseLowerBoundModifier &= Tok.is(tok::comma);
if (CanParseLowerBoundModifier || Tok.is(tok::colon)) {
ConsumeToken();
+ } else if (CanParseLowerBoundModifier && Tok.is(tok::comma)) {
+ // num_teams(dims(N), lower : upper) is invalid. Only lower:upper may
+ // follow dims via comma, but sema will reject the combination.
+ ConsumeToken();
} else {
Diag(Tok, diag::err_modifier_expected_colon)
<< getOpenMPClauseName(Kind);
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