[OpenMP 6.0] Allow only byref arguments with need_device_addr modifier on adjust_args clause
#149586
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
llvmbot
added
clang
|
@llvm/pr-subscribers-clang Author: Fazlay Rabbi (mdfazlay) ChangesIf the need_device_addr adjust-op modifier is present, each list item that appears in the clause must refer to an argument in the declaration of the function variant that has a reference type. Reference: Full diff: https://github.com/llvm/llvm-project/pull/149586.diff 4 Files Affected:
diff --git a/clang/include/clang/Basic/DiagnosticParseKinds.td b/clang/include/clang/Basic/DiagnosticParseKinds.td
index 35903af998fbe..165f01514e2b1 100644
--- a/clang/include/clang/Basic/DiagnosticParseKinds.td
+++ b/clang/include/clang/Basic/DiagnosticParseKinds.td
@@ -1594,6 +1594,9 @@ def err_omp_unknown_adjust_args_op
def err_omp_declare_variant_wrong_clause : Error<
"expected %select{'match'|'match', 'adjust_args', or 'append_args'}0 clause "
"on 'omp declare variant' directive">;
+def err_omp_non_by_ref_need_device_addr_modifier_argument
+ : Error<"expected reference type argument on 'adjust_args' clause with "
+ "'need_device_addr' modifier">;
def err_omp_declare_variant_duplicate_nested_trait : Error<
"nested OpenMP context selector contains duplicated trait '%0'"
" in selector '%1' and set '%2' with different score">;
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 4ecc9b0d4c5c8..a26f8f1691435 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -7612,6 +7612,21 @@ void SemaOpenMP::ActOnOpenMPDeclareVariantDirective(
return;
}
+ // OpenMP 6.0 [9.6.2 (page 332, line 31-33, adjust_args clause, Restrictions]
+ // If the `need_device_addr` adjust-op modifier is present, each list item
+ // that appears in the clause must refer to an argument in the declaration of
+ // the function variant that has a reference type
+ for (Expr *E : AdjustArgsNeedDeviceAddr) {
+ E = E->IgnoreParenImpCasts();
+ if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) {
+ if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl())) {
+ if (!VD->getType()->isReferenceType())
+ Diag(E->getExprLoc(),
+ diag::err_omp_non_by_ref_need_device_addr_modifier_argument);
+ }
+ }
+ }
+
auto *NewAttr = OMPDeclareVariantAttr::CreateImplicit(
getASTContext(), VariantRef, &TI,
const_cast<Expr **>(AdjustArgsNothing.data()), AdjustArgsNothing.size(),
diff --git a/clang/test/OpenMP/declare_variant_clauses_ast_print.cpp b/clang/test/OpenMP/declare_variant_clauses_ast_print.cpp
index c14e19cc8b7ec..e98a23e865cf8 100644
--- a/clang/test/OpenMP/declare_variant_clauses_ast_print.cpp
+++ b/clang/test/OpenMP/declare_variant_clauses_ast_print.cpp
@@ -38,11 +38,11 @@
#ifndef HEADER
#define HEADER
-void foo_v1(float *AAA, float *BBB, int *I) {return;}
-void foo_v2(float *AAA, float *BBB, int *I) {return;}
-void foo_v3(float *AAA, float *BBB, int *I) {return;}
+void foo_v1(float *AAA, float *BBB, int &CCC, int *I) {return;}
+void foo_v2(float *AAA, float *BBB, int &CCC, int *I) {return;}
+void foo_v3(float *AAA, float *BBB, int &CCC, int *I) {return;}
-//DUMP: FunctionDecl{{.*}} foo 'void (float *, float *, int *)'
+//DUMP: FunctionDecl{{.*}} foo 'void (float *, float *, int &, int *)'
//DUMP: OMPDeclareVariantAttr{{.*}}device={arch(x86, x86_64)}
//DUMP: DeclRefExpr{{.*}}Function{{.*}}foo_v3
//DUMP: DeclRefExpr{{.*}}ParmVar{{.*}}'I'
@@ -54,9 +54,9 @@ void foo_v3(float *AAA, float *BBB, int *I) {return;}
//DUMP: DeclRefExpr{{.*}}Function{{.*}}foo_v1
//DUMP: DeclRefExpr{{.*}}ParmVar{{.*}}'AAA'
//DUMP: DeclRefExpr{{.*}}ParmVar{{.*}}'BBB'
-//PRINT: #pragma omp declare variant(foo_v3) match(construct={dispatch}, device={arch(x86, x86_64)}) adjust_args(nothing:I) adjust_args(need_device_ptr:BBB) adjust_args(need_device_addr:AAA)
+//PRINT: #pragma omp declare variant(foo_v3) match(construct={dispatch}, device={arch(x86, x86_64)}) adjust_args(nothing:I) adjust_args(need_device_ptr:BBB) adjust_args(need_device_addr:CCC)
-//PRINT: #pragma omp declare variant(foo_v2) match(construct={dispatch}, device={arch(ppc)}) adjust_args(need_device_ptr:AAA) adjust_args(need_device_addr:BBB)
+//PRINT: #pragma omp declare variant(foo_v2) match(construct={dispatch}, device={arch(ppc)}) adjust_args(need_device_ptr:AAA) adjust_args(need_device_addr:CCC)
//PRINT: omp declare variant(foo_v1) match(construct={dispatch}, device={arch(arm)}) adjust_args(need_device_ptr:AAA,BBB)
@@ -67,33 +67,33 @@ void foo_v3(float *AAA, float *BBB, int *I) {return;}
#pragma omp declare variant(foo_v2) \
match(construct={dispatch}, device={arch(ppc)}), \
adjust_args(need_device_ptr:AAA) \
- adjust_args(need_device_addr:BBB)
+ adjust_args(need_device_addr:CCC)
#pragma omp declare variant(foo_v3) \
adjust_args(need_device_ptr:BBB) adjust_args(nothing:I) \
- adjust_args(need_device_addr:AAA) \
+ adjust_args(need_device_addr:CCC) \
match(construct={dispatch}, device={arch(x86,x86_64)})
-void foo(float *AAA, float *BBB, int *I) {return;}
+void foo(float *AAA, float *BBB, int &CCC, int *I) {return;}
-void Foo_Var(float *AAA, float *BBB, float *CCC) {return;}
+void Foo_Var(float *AAA, float *BBB, float *&CCC) {return;}
#pragma omp declare variant(Foo_Var) \
match(construct={dispatch}, device={arch(x86_64)}) \
adjust_args(need_device_ptr:AAA) adjust_args(nothing:BBB) \
adjust_args(need_device_addr:CCC)
template<typename T>
-void Foo(T *AAA, T *BBB, T *CCC) {return;}
+void Foo(T *AAA, T *BBB, T *&CCC) {return;}
//PRINT: #pragma omp declare variant(Foo_Var) match(construct={dispatch}, device={arch(x86_64)}) adjust_args(nothing:BBB) adjust_args(need_device_ptr:AAA) adjust_args(need_device_addr:CCC)
-//DUMP: FunctionDecl{{.*}} Foo 'void (T *, T *, T *)'
+//DUMP: FunctionDecl{{.*}} Foo 'void (T *, T *, T *&)'
//DUMP: OMPDeclareVariantAttr{{.*}}device={arch(x86_64)}
//DUMP: DeclRefExpr{{.*}}Function{{.*}}Foo_Var
//DUMP: DeclRefExpr{{.*}}ParmVar{{.*}}'BBB'
//DUMP: DeclRefExpr{{.*}}ParmVar{{.*}}'AAA'
//DUMP: DeclRefExpr{{.*}}ParmVar{{.*}}'CCC'
//
-//DUMP: FunctionDecl{{.*}} Foo 'void (float *, float *, float *)'
+//DUMP: FunctionDecl{{.*}} Foo 'void (float *, float *, float *&)'
//DUMP: OMPDeclareVariantAttr{{.*}}device={arch(x86_64)}
//DUMP: DeclRefExpr{{.*}}Function{{.*}}Foo_Var
//DUMP: DeclRefExpr{{.*}}ParmVar{{.*}}'BBB'
diff --git a/clang/test/OpenMP/declare_variant_clauses_messages.cpp b/clang/test/OpenMP/declare_variant_clauses_messages.cpp
index bca91481220ff..916d15fde9ff2 100644
--- a/clang/test/OpenMP/declare_variant_clauses_messages.cpp
+++ b/clang/test/OpenMP/declare_variant_clauses_messages.cpp
@@ -91,6 +91,7 @@ void foo_v1(float *AAA, float *BBB, int *I) { return; }
void foo_v2(float *AAA, float *BBB, int *I) { return; }
void foo_v3(float *AAA, float *BBB, int *I) { return; }
void foo_v4(float *AAA, float *BBB, int *I, omp_interop_t IOp) { return; }
+void foo_v5(float *AAA, float *BBB, int I) { return; }
#if _OPENMP >= 202011 // At least OpenMP 5.1
void vararg_foo(const char *fmt, omp_interop_t it, ...);
@@ -129,6 +130,11 @@ void vararg_bar2(const char *fmt) { return; }
adjust_args(nothing:J) \
match(construct={dispatch}, device={arch(x86,x86_64)})
+// expected-error@+2 {{expected reference type argument on 'adjust_args' clause with 'need_device_addr' modifier}}
+#pragma omp declare variant(foo_v1) \
+ adjust_args(need_device_addr:AAA) \
+ match(construct={dispatch}, device={arch(x86,x86_64)})
+
// expected-error@+2 {{expected reference to one of the parameters of function 'foo'}}
#pragma omp declare variant(foo_v3) \
adjust_args(nothing:Other) \
@@ -218,6 +224,12 @@ void vararg_bar2(const char *fmt) { return; }
void foo(float *AAA, float *BBB, int *I) { return; }
+// expected-error@+2 {{expected reference type argument on 'adjust_args' clause with 'need_device_addr' modifier}}
+#pragma omp declare variant(foo_v5) \
+ adjust_args(need_device_addr:I) \
+ match(construct={dispatch}, device={arch(x86,x86_64)})
+void foo5(float *AAA, float *BBB, int I) { return; }
+
#endif // NO_INTEROP_T_DEF
#ifdef C
|
mdfazlay
force-pushed
the
need_device_modifier_allow_only_byref
branch
from
23c3df5 to
0f90dac
Compare
|
Update OpenMPSupport.rst and release nodes doc |
mdfazlay
force-pushed
the
need_device_modifier_allow_only_byref
branch
from
0f90dac to
461db28
Compare
mdfazlay
force-pushed
the
need_device_modifier_allow_only_byref
branch
from
461db28 to
f0d0bfd
Compare
I updated the OpenMPSupport.rst file. Please take a look. Are you referring to |
mdfazlay
force-pushed
the
need_device_modifier_allow_only_byref
branch
from
f0d0bfd to
d3faac1
Compare
Yes, this one. Better to add iteratively, rather than at once. |
Done. Please take a look. Thank you. |
…ier on `adjust_args` clause If the need_device_addr adjust-op modifier is present, each list item that appears in the clause must refer to an argument in the declaration of the function variant that has a reference type. Reference: OpenMP 6.0 [Sec 9.6.2, page 332, line 31-33, adjust_args clause, Restrictions] PR Link: llvm#149586
mdfazlay
force-pushed
the
need_device_modifier_allow_only_byref
branch
from
8c122c5 to
c0a2df6
Compare
alexey-bataev
approved these changes
Jul 23, 2025
mahesh-attarde
pushed a commit
to mahesh-attarde/llvm-project
that referenced
this pull request
Jul 28, 2025
…ier on `adjust_args` clause (llvm#149586) If the need_device_addr adjust-op modifier is present, each list item that appears in the clause must refer to an argument in the declaration of the function variant that has a reference type. Reference: OpenMP 6.0 [Sec 9.6.2, page 332, line 31-33, adjust_args clause, Restrictions]
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
If the need_device_addr adjust-op modifier is present, each list item that appears in the clause must refer to an argument in the declaration of the function variant that has a reference type.
Reference:
OpenMP 6.0 [Sec 9.6.2, page 332, line 31-33, adjust_args clause, Restrictions]