From fe2b3be3f4b6ec6b3a6f89c26016a3983b7cb351 Mon Sep 17 00:00:00 2001 From: hjl 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 * 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 --- 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