https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65958
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- Author: ebotcazou Date: Fri Dec 4 11:57:15 2015 New Revision: 231260 URL: https://gcc.gnu.org/viewcvs?rev=231260&root=gcc&view=rev Log: PR middle-end/65958 * gimplify.c (struct gimplify_ctx): Turn boolean fields into 1-bit fields, add keep_stack and reorder them. (gimplify_bind_expr): Save gimplify_ctxp->keep_stack on entry then set it to false. Do not insert a stack save/restore pair if it has been set to true by the gimplification of the statements. Restore it to the saved value on exit if it is still false. (gimplify_vla_decl): Do not set gimplify_ctxp->save_stack here. (gimplify_call_expr) <BUILT_IN_ALLOCA[_WITH_ALIGN]>: New case. Set either save_stack or keep_stack depending on CALL_ALLOCA_FOR_VAR_P. * doc/extend.texi (Variable Length): Document new behavior. * doc/generic.texi (Blocks): Document new handling of VLAs. Added: trunk/gcc/testsuite/gcc.dg/vla-24.c Modified: trunk/gcc/ChangeLog trunk/gcc/doc/extend.texi trunk/gcc/doc/generic.texi trunk/gcc/gimplify.c trunk/gcc/testsuite/ChangeLog
