70 lines
2.3 KiB
Diff
70 lines
2.3 KiB
Diff
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From b1fc91cda7c15264116f3dde6944ead149123653 Mon Sep 17 00:00:00 2001
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From: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Mon, 15 Jan 2018 11:28:44 +0000
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Subject: [PATCH 02/13] i386: Use reference of struct ix86_frame to avoid copy
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When there is no need to make a copy of ix86_frame, we can use reference
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of struct ix86_frame to avoid copy.
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Backport from mainline
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2017-11-06 H.J. Lu <hongjiu.lu@intel.com>
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* config/i386/i386.c (ix86_can_use_return_insn_p): Use reference
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of struct ix86_frame.
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(ix86_initial_elimination_offset): Likewise.
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(ix86_expand_split_stack_prologue): Likewise.
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---
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gcc/config/i386/i386.c | 8 +++-----
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1 file changed, 3 insertions(+), 5 deletions(-)
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diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
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index a1ff32b648b..13ebf107e90 100644
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--- a/gcc/config/i386/i386.c
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+++ b/gcc/config/i386/i386.c
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@@ -10887,7 +10887,6 @@ symbolic_reference_mentioned_p (rtx op)
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bool
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ix86_can_use_return_insn_p (void)
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{
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- struct ix86_frame frame;
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if (! reload_completed || frame_pointer_needed)
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return 0;
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@@ -10898,7 +10897,7 @@ ix86_can_use_return_insn_p (void)
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return 0;
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ix86_compute_frame_layout ();
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- frame = cfun->machine->frame;
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+ struct ix86_frame &frame = cfun->machine->frame;
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return (frame.stack_pointer_offset == UNITS_PER_WORD
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&& (frame.nregs + frame.nsseregs) == 0);
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}
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@@ -11310,7 +11309,7 @@ HOST_WIDE_INT
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ix86_initial_elimination_offset (int from, int to)
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{
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ix86_compute_frame_layout ();
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- struct ix86_frame frame = cfun->machine->frame;
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+ struct ix86_frame &frame = cfun->machine->frame;
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if (from == ARG_POINTER_REGNUM && to == HARD_FRAME_POINTER_REGNUM)
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return frame.hard_frame_pointer_offset;
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@@ -13821,7 +13820,6 @@ static GTY(()) rtx split_stack_fn_large;
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void
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ix86_expand_split_stack_prologue (void)
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{
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- struct ix86_frame frame;
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HOST_WIDE_INT allocate;
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unsigned HOST_WIDE_INT args_size;
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rtx_code_label *label;
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@@ -13834,7 +13832,7 @@ ix86_expand_split_stack_prologue (void)
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ix86_finalize_stack_realign_flags ();
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ix86_compute_frame_layout ();
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- frame = cfun->machine->frame;
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+ struct ix86_frame &frame = cfun->machine->frame;
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allocate = frame.stack_pointer_offset - INCOMING_FRAME_SP_OFFSET;
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/* This is the label we will branch to if we have enough stack
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--
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2.16.3
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