[PATCH] D146603: [docs] Document -fomit-frame-pointer

[Fangrui Song via Phabricator via cfe-commits]

MaskRay updated this revision to Diff 507220.
MaskRay added a comment.

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Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D146603/new/

https://reviews.llvm.org/D146603

Files:
  clang/include/clang/Driver/Options.td


Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -2638,7 +2638,11 @@
   NegFlag<SetFalse, [], "Don't try">,
   BothFlags<[CC1Option, NoDriverOption], " to avoid heapifying local blocks">>;
 
-def fomit_frame_pointer : Flag<["-"], "fomit-frame-pointer">, Group<f_Group>;
+def fomit_frame_pointer : Flag<["-"], "fomit-frame-pointer">, Group<f_Group>,
+  HelpText<"Omit the frame pointer from functions that don't need it. "
+  "Some stack unwinding cases like profilers and sanitizers may prefer specifying -fno-omit-frame-pointer. "
+  "On many targets -O1 and higher omit the frame pointer by default. "
+  "-m[no-]omit-leaf-frame-pointer takes precedence for leaf funcitons">;
 def fopenmp : Flag<["-"], "fopenmp">, Group<f_Group>, Flags<[CC1Option, NoArgumentUnused, FlangOption, FC1Option]>,
   HelpText<"Parse OpenMP pragmas and generate parallel code.">;
 def fno_openmp : Flag<["-"], "fno-openmp">, Group<f_Group>, Flags<[NoArgumentUnused]>;


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