| From fe2b3be3f4b6ec6b3a6f89c26016a3983b7cb351 Mon Sep 17 00:00:00 2001 |
| From: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> |
| Date: Mon, 15 Jan 2018 11:28:44 +0000 |
| Subject: [PATCH 02/12] i386: 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 |
| 2017-11-06 H.J. Lu <hongjiu.lu@intel.com> |
| |
| * config/i386/i386.c (ix86_can_use_return_insn_p): Use reference |
| of struct ix86_frame. |
| (ix86_initial_elimination_offset): Likewise. |
| (ix86_expand_split_stack_prologue): Likewise. |
| |
| Upstream-Status: Pending |
| |
| Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> |
| |
| --- |
| gcc/config/i386/i386.c | 8 +++----- |
| 1 file changed, 3 insertions(+), 5 deletions(-) |
| |
| diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c |
| index a1ff32b..13ebf10 100644 |
| --- a/gcc/config/i386/i386.c |
| +++ b/gcc/config/i386/i386.c |
| @@ -10887,7 +10887,6 @@ symbolic_reference_mentioned_p (rtx op) |
| bool |
| ix86_can_use_return_insn_p (void) |
| { |
| - struct ix86_frame frame; |
| |
| if (! reload_completed || frame_pointer_needed) |
| return 0; |
| @@ -10898,7 +10897,7 @@ ix86_can_use_return_insn_p (void) |
| return 0; |
| |
| ix86_compute_frame_layout (); |
| - frame = cfun->machine->frame; |
| + struct ix86_frame &frame = cfun->machine->frame; |
| return (frame.stack_pointer_offset == UNITS_PER_WORD |
| && (frame.nregs + frame.nsseregs) == 0); |
| } |
| @@ -11310,7 +11309,7 @@ HOST_WIDE_INT |
| ix86_initial_elimination_offset (int from, int to) |
| { |
| ix86_compute_frame_layout (); |
| - struct ix86_frame frame = cfun->machine->frame; |
| + struct ix86_frame &frame = cfun->machine->frame; |
| |
| if (from == ARG_POINTER_REGNUM && to == HARD_FRAME_POINTER_REGNUM) |
| return frame.hard_frame_pointer_offset; |
| @@ -13821,7 +13820,6 @@ static GTY(()) rtx split_stack_fn_large; |
| void |
| ix86_expand_split_stack_prologue (void) |
| { |
| - struct ix86_frame frame; |
| HOST_WIDE_INT allocate; |
| unsigned HOST_WIDE_INT args_size; |
| rtx_code_label *label; |
| @@ -13834,7 +13832,7 @@ ix86_expand_split_stack_prologue (void) |
| |
| ix86_finalize_stack_realign_flags (); |
| ix86_compute_frame_layout (); |
| - frame = cfun->machine->frame; |
| + struct ix86_frame &frame = cfun->machine->frame; |
| allocate = frame.stack_pointer_offset - INCOMING_FRAME_SP_OFFSET; |
| |
| /* This is the label we will branch to if we have enough stack |
| -- |
| 2.7.4 |
| |