[flang-commits] [clang] [flang] [flang][OpenMP] Add -f[no]-openmp-simd (PR #150269)

Tarun Prabhu via flang-commits flang-commits at lists.llvm.org
Wed Jul 23 10:41:06 PDT 2025


================
@@ -3706,14 +3706,19 @@ def fopenmp_relocatable_target : Flag<["-"], "fopenmp-relocatable-target">,
 def fnoopenmp_relocatable_target : Flag<["-"], "fnoopenmp-relocatable-target">,
   Group<f_Group>, Flags<[NoArgumentUnused, HelpHidden]>,
   Visibility<[ClangOption, CC1Option]>;
-def fopenmp_simd : Flag<["-"], "fopenmp-simd">, Group<f_Group>,
-  Flags<[NoArgumentUnused]>, Visibility<[ClangOption, CC1Option]>,
-  HelpText<"Emit OpenMP code only for SIMD-based constructs.">;
+def fopenmp_simd : Flag<["-"], "fopenmp-simd">,
+                   Group<f_Group>,
+                   Flags<[NoArgumentUnused]>,
+                   Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
+                   HelpText<"Emit OpenMP code only for SIMD-based constructs.">;
 def fopenmp_enable_irbuilder : Flag<["-"], "fopenmp-enable-irbuilder">, Group<f_Group>,
   Flags<[NoArgumentUnused, HelpHidden]>, Visibility<[ClangOption, CC1Option]>,
   HelpText<"Use the experimental OpenMP-IR-Builder codegen path.">;
-def fno_openmp_simd : Flag<["-"], "fno-openmp-simd">, Group<f_Group>,
-  Flags<[NoArgumentUnused]>, Visibility<[ClangOption, CC1Option]>;
+def fno_openmp_simd
+    : Flag<["-"], "fno-openmp-simd">,
+      Group<f_Group>,
+      Flags<[NoArgumentUnused]>,
+      Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>;
----------------
tarunprabhu wrote:

Could we add some help text here? Specifically, I am not sure if this option means

- Disable OpenMP simd constructs *only*, but allow all other OpenMP constructs

OR 

- Invert the -fopenmp-simd flag i.e. emit OpenMP code for *all* OpenMP constructs, *including* simd

https://github.com/llvm/llvm-project/pull/150269


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