[OpenMP] Issue warning if a simd construct nested inside another simd
construct
llvm-svn: 274352
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 21ccfd0..ec67bca 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -2940,15 +2940,19 @@
ShouldBeInTargetRegion,
ShouldBeInTeamsRegion
} Recommend = NoRecommend;
- if (isOpenMPSimdDirective(ParentRegion) && CurrentRegion != OMPD_ordered &&
- CurrentRegion != OMPD_simd) {
+ if (isOpenMPSimdDirective(ParentRegion) && CurrentRegion != OMPD_ordered) {
// OpenMP [2.16, Nesting of Regions]
// OpenMP constructs may not be nested inside a simd region.
// OpenMP [2.8.1,simd Construct, Restrictions]
- // An ordered construct with the simd clause is the only OpenMP construct
- // that can appear in the simd region.
- SemaRef.Diag(StartLoc, diag::err_omp_prohibited_region_simd);
- return true;
+ // An ordered construct with the simd clause is the only OpenMP
+ // construct that can appear in the simd region.
+ // Allowing a SIMD consruct nested in another SIMD construct is an
+ // extension. The OpenMP 4.5 spec does not allow it. Issue a warning
+ // message.
+ SemaRef.Diag(StartLoc, (CurrentRegion != OMPD_simd)
+ ? diag::err_omp_prohibited_region_simd
+ : diag::warn_omp_nesting_simd);
+ return CurrentRegion != OMPD_simd;
}
if (ParentRegion == OMPD_atomic) {
// OpenMP [2.16, Nesting of Regions]