r266653 - in /trunk/gcc: ChangeLog config/i386/...

[ak@gcc.gnu.org]

Author: ak
Date: Thu Nov 29 23:11:53 2018
New Revision: 266653

URL: https://gcc.gnu.org/viewcvs?rev=266653&root=gcc&view=rev
Log:
Support changing fentry name per function

It can be useful to have some classes of functions that use a different
__fentry__ instrumentation than others.  Currently it is only
possible to disable instrumentation on the command line or with
no_instrument_function, but not to change the instrumentation function
on a case by case base.

Add some flexibility to allow to change the instrumentation function
name per file with an option or per function with a new attribute.
This also allows switching to nops for individual functions.

gcc/:

2018-11-29  Andi Kleen  <ak@linux.intel.com>

	* config/i386/i386.c (x86_print_call_or_nop): Handle nop name.
	(current_fentry_name): Add.
	(x86_function_profiler): Handle fentry_name attribute.
	(ix86_handle_fentry_name): Add.
	(ix86_attribute_table): Add fentry_name.
	* config/i386/i386.opt: Add -mfentry-name
	* doc/extend.texi: Document fentry_name.
	* doc/invoke.texi: Document minstrument-return.

gcc/testsuite/:

2018-11-29  Andi Kleen  <ak@linux.intel.com>

	* gcc.target/i386/fentryname1.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/fentryname1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/i386/i386.opt
    trunk/gcc/doc/extend.texi
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog