[Patch 5/17] Add -fpermitted-flt-eval-methods=[c11|ts-18661-3]

[Patch 5/17] Add -fpermitted-flt-eval-methods=[c11|ts-18661-3]

gcc/c-family/

	* c-opts.c (c_common_post_options): Add logic to handle the default
	case for -fpermitted-flt-eval-methods.

gcc/

	* common.opt (fpermitted-flt-eval-methods): New.
	* doc/invoke.texi (-fpermitted-flt-eval-methods): Document it.
	* flag_types.h (permitted_flt_eval_methods): New.

gcc/testsuite/

	* gcc.dg/fpermitted-flt-eval-methods_1.c: New.
	* gcc.dg/fpermitted-flt-eval-methods_2.c: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@242775 138bc75d-0d04-0410-961f-82ee72b054a4