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i386: More use reference of struct ix86_frame to avoid copy 

When there is no need to make a copy of ix86_frame, we can use reference
of struct ix86_frame to avoid copy.

	Backport from mainline
	* config/i386/i386.c (ix86_expand_prologue): Use reference of
	struct ix86_frame.
	(ix86_expand_epilogue): Likewise.

From-SVN: r256695
This commit is contained in:
H.J. Lu 2018-01-15 11:33:42 +00:00 committed by H.J. Lu
parent ed493f2709
commit d031a3aaf5
2 changed files with 9 additions and 4 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2018-01-15 H.J. Lu <hongjiu.lu@intel.com>
Backport from mainline
* config/i386/i386.c (ix86_expand_prologue): Use reference of
struct ix86_frame.
(ix86_expand_epilogue): Likewise.
2018-01-15 H.J. Lu <hongjiu.lu@intel.com>
Backport from mainline

6
gcc/config/i386/i386.c
View File

@ -13667,7 +13667,6 @@ ix86_expand_prologue (void)
{
struct machine_function *m = cfun->machine;
rtx insn, t;
struct ix86_frame frame;
HOST_WIDE_INT allocate;
bool int_registers_saved;
bool sse_registers_saved;
@ -13691,7 +13690,7 @@ ix86_expand_prologue (void)
m->fs.sp_valid = true;
ix86_compute_frame_layout ();
frame = m->frame;
struct ix86_frame &frame = cfun->machine->frame;
if (!TARGET_64BIT && ix86_function_ms_hook_prologue (current_function_decl))
{
@ -14354,13 +14353,12 @@ ix86_expand_epilogue (int style)
{
struct machine_function *m = cfun->machine;
struct machine_frame_state frame_state_save = m->fs;
struct ix86_frame frame;
bool restore_regs_via_mov;
bool using_drap;
ix86_finalize_stack_realign_flags ();
ix86_compute_frame_layout ();
frame = m->frame;
struct ix86_frame &frame = cfun->machine->frame;
m->fs.sp_valid = (!frame_pointer_needed
|| (crtl->sp_is_unchanging