r256996 - in /trunk/gcc: ChangeLog config/i386/...

[hjl@gcc.gnu.org]

Author: hjl
Date: Tue Jan 23 19:30:32 2018
New Revision: 256996

URL: https://gcc.gnu.org/viewcvs?rev=256996&root=gcc&view=rev
Log:
i386: Use const reference of struct ix86_frame to avoid copy

We can use const reference of struct ix86_frame to avoid making a local
copy of ix86_frame.  ix86_expand_epilogue makes a local copy of struct
ix86_frame and uses the reg_save_offset field as a local variable.  This
patch uses a separate local variable for reg_save_offset.

Tested on x86-64 with ada.

	PR target/83905
	* config/i386/i386.c (ix86_expand_prologue): Use cost reference
	of struct ix86_frame.
	(ix86_expand_epilogue): Likewise.  Add a local variable for
	the reg_save_offset field in struct ix86_frame.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c