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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.

From-SVN: r215284
This commit is contained in:
Andi Kleen 2014-09-16 03:22:41 +00:00 committed by Andi Kleen
parent e93050426d
commit 0b37ba8a60
2 changed files with 9 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
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.
2014-09-15 Trevor Saunders <tsaunders@mozilla.com>
* cfgrtl.c, combine.c, config/arc/arc.c, config/mcore/mcore.c,

3
gcc/function.c
View File

@ -4555,6 +4555,9 @@ allocate_struct_function (tree fndecl, bool abstract_p)
but is this worth the hassle? */
cfun->can_throw_non_call_exceptions = flag_non_call_exceptions;
cfun->can_delete_dead_exceptions = flag_delete_dead_exceptions;
if (!profile_flag && !flag_instrument_function_entry_exit)
DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (fndecl) = 1;
}
}