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| author | hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-11-06 23:04:15 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-12-18 11:03:44 -0800 |
| commit | b721283e4f4ff378a0bee2255b7d62163eab9f1e (patch) | |
| tree | ace68b08ea107e412389681af1a5656fc7eaab8e | |
| parent | 9005adea32ef0cc14b3ef7ceacf5b67bf0862194 (diff) | |
| download | gcc-b721283e4f4ff378a0bee2255b7d62163eab9f1e.tar.gz | |
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.
Tested on x86-64.
* 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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254480 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/config/i386/i386.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 813337242d8..397ef7cac26 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -11843,8 +11843,6 @@ symbolic_reference_mentioned_p (rtx op) bool ix86_can_use_return_insn_p (void) { - struct ix86_frame frame; - /* Don't use `ret' instruction in interrupt handler. */ if (! reload_completed || frame_pointer_needed @@ -11857,7 +11855,7 @@ 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); } @@ -12344,7 +12342,7 @@ 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; @@ -14860,7 +14858,6 @@ 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; @@ -14873,7 +14870,7 @@ 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 |