stack-ptr-mod.cc File Reference

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "rtl.h"
#include "df.h"
#include "memmodel.h"
#include "emit-rtl.h"
#include "tree-pass.h"

Include dependency graph for stack-ptr-mod.cc:

Functions
static void	notice_stack_pointer_modification_1 (rtx x, const_rtx pat, void *data)
rtl_opt_pass *	make_pass_stack_ptr_mod (gcc::context *ctxt)

Function Documentation

make_pass_stack_ptr_mod()

rtl_opt_pass * make_pass_stack_ptr_mod

(

gcc::context *

ctxt

)

notice_stack_pointer_modification_1()

static void notice_stack_pointer_modification_1 ( rtx x, const_rtx pat, void * data )

static

Discover if the stack pointer is modified in a function.
   Copyright (C) 2007-2025 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.   

Determine if the stack pointer is constant over the life of the function.
Only useful before prologues have been emitted.   

References crtl, GET_CODE, GET_RTX_CLASS, MEM_P, RTX_AUTOINC, stack_pointer_rtx, and XEXP.