PR gcov-profile/68025
	* tree-profile.c (tree_profiling): Respect
	no_profile_instrument_function attribute.
	* doc/extend.texi: Document no_profile_instrument_function
	attribute.
	PR gcov-profile/68025
	* c-common.c (handle_no_profile_instrument_function_attribute):
	PR gcov-profile/68025
	* gcc.dg/no_profile_instrument_function-attr-1.c: New test.

From-SVN: r238811