Always set DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT correctly

Always set DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT correctly

When profiling is disabled force DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT
for each function to one. This information is then preserved
through LTO.

With this patch for LTO builds -pg needs to be set on both the
LTO final link and the original source build, to allow -pg
(or -pg -fentry) to be active for that source file. This allows
to build large projects mostly with -pg, except for a few files,
and still use LTO.

gcc/:

2014-09-15  Andi Kleen  <ak@linux.intel.com>

	* function.c (allocate_struct_function): Force
	DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT to one when
	profiling is disabled.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@215284 138bc75d-0d04-0410-961f-82ee72b054a4