From 839ca2d69157ef03c8df0ab912dacdb991738694 Mon Sep 17 00:00:00 2001 From: hjl Date: Mon, 15 Jan 2018 11:33:42 +0000 Subject: [PATCH 3/9] 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. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-7-branch@256695 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 7 +++++++ gcc/config/i386/i386.c | 6 ++---- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 397ef7c..986e6d7 100644 --- a/src/gcc/config/i386/i386.c +++ b/src/gcc/config/i386/i386.c @@ -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 -- 2.7.4