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author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/lists.c | |
parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/lists.c')
-rw-r--r-- | gcc-4.9/gcc/lists.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/lists.c b/gcc-4.9/gcc/lists.c new file mode 100644 index 000000000..ce545cb56 --- /dev/null +++ b/gcc-4.9/gcc/lists.c @@ -0,0 +1,247 @@ +/* List management for the GCC expander. + Copyright (C) 1987-2014 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/>. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "diagnostic-core.h" +#include "rtl.h" +#include "ggc.h" + +static void free_list (rtx *, rtx *); + +/* Functions for maintaining cache-able lists of EXPR_LIST and INSN_LISTs. */ + +/* An INSN_LIST containing all INSN_LISTs allocated but currently unused. */ +static GTY ((deletable)) rtx unused_insn_list; + +/* An EXPR_LIST containing all EXPR_LISTs allocated but currently unused. */ +static GTY ((deletable)) rtx unused_expr_list; + +/* This function will free an entire list of either EXPR_LIST, INSN_LIST + or DEPS_LIST nodes. This is to be used only on lists that consist + exclusively of nodes of one type only. This is only called by + free_EXPR_LIST_list, free_INSN_LIST_list and free_DEPS_LIST_list. */ +static void +free_list (rtx *listp, rtx *unused_listp) +{ + rtx link, prev_link; + + prev_link = *listp; + link = XEXP (prev_link, 1); + + gcc_assert (unused_listp != &unused_insn_list + || GET_CODE (prev_link) == INSN_LIST); + + while (link) + { + gcc_assert (unused_listp != &unused_insn_list + || GET_CODE (prev_link) == INSN_LIST); + + prev_link = link; + link = XEXP (link, 1); + } + + XEXP (prev_link, 1) = *unused_listp; + *unused_listp = *listp; + *listp = 0; +} + +/* Find corresponding to ELEM node in the list pointed to by LISTP. + This node must exist in the list. Returns pointer to that node. */ +static rtx * +find_list_elem (rtx elem, rtx *listp) +{ + while (XEXP (*listp, 0) != elem) + listp = &XEXP (*listp, 1); + return listp; +} + +/* Remove the node pointed to by LISTP from the list. */ +static void +remove_list_node (rtx *listp) +{ + rtx node; + + node = *listp; + *listp = XEXP (node, 1); + XEXP (node, 1) = 0; +} + +/* Removes corresponding to ELEM node from the list pointed to by LISTP. + Returns that node. */ +rtx +remove_list_elem (rtx elem, rtx *listp) +{ + rtx node; + + listp = find_list_elem (elem, listp); + node = *listp; + remove_list_node (listp); + return node; +} + +/* This call is used in place of a gen_rtx_INSN_LIST. If there is a cached + node available, we'll use it, otherwise a call to gen_rtx_INSN_LIST + is made. */ +rtx +alloc_INSN_LIST (rtx val, rtx next) +{ + rtx r; + + if (unused_insn_list) + { + r = unused_insn_list; + unused_insn_list = XEXP (r, 1); + XEXP (r, 0) = val; + XEXP (r, 1) = next; + PUT_REG_NOTE_KIND (r, VOIDmode); + + gcc_assert (GET_CODE (r) == INSN_LIST); + } + else + r = gen_rtx_INSN_LIST (VOIDmode, val, next); + + return r; +} + +/* This call is used in place of a gen_rtx_EXPR_LIST. If there is a cached + node available, we'll use it, otherwise a call to gen_rtx_EXPR_LIST + is made. */ +rtx +alloc_EXPR_LIST (int kind, rtx val, rtx next) +{ + rtx r; + + if (unused_expr_list) + { + r = unused_expr_list; + unused_expr_list = XEXP (r, 1); + XEXP (r, 0) = val; + XEXP (r, 1) = next; + PUT_REG_NOTE_KIND (r, kind); + } + else + r = gen_rtx_EXPR_LIST ((enum machine_mode) kind, val, next); + + return r; +} + +/* This function will free up an entire list of EXPR_LIST nodes. */ +void +free_EXPR_LIST_list (rtx *listp) +{ + if (*listp == 0) + return; + free_list (listp, &unused_expr_list); +} + +/* This function will free up an entire list of INSN_LIST nodes. */ +void +free_INSN_LIST_list (rtx *listp) +{ + if (*listp == 0) + return; + free_list (listp, &unused_insn_list); +} + +/* Make a copy of the INSN_LIST list LINK and return it. */ +rtx +copy_INSN_LIST (rtx link) +{ + rtx new_queue; + rtx *pqueue = &new_queue; + + for (; link; link = XEXP (link, 1)) + { + rtx x = XEXP (link, 0); + rtx newlink = alloc_INSN_LIST (x, NULL); + *pqueue = newlink; + pqueue = &XEXP (newlink, 1); + } + *pqueue = NULL_RTX; + return new_queue; +} + +/* Duplicate the INSN_LIST elements of COPY and prepend them to OLD. */ +rtx +concat_INSN_LIST (rtx copy, rtx old) +{ + rtx new_rtx = old; + for (; copy ; copy = XEXP (copy, 1)) + { + new_rtx = alloc_INSN_LIST (XEXP (copy, 0), new_rtx); + PUT_REG_NOTE_KIND (new_rtx, REG_NOTE_KIND (copy)); + } + return new_rtx; +} + +/* This function will free up an individual EXPR_LIST node. */ +void +free_EXPR_LIST_node (rtx ptr) +{ + XEXP (ptr, 1) = unused_expr_list; + unused_expr_list = ptr; +} + +/* This function will free up an individual INSN_LIST node. */ +void +free_INSN_LIST_node (rtx ptr) +{ + gcc_assert (GET_CODE (ptr) == INSN_LIST); + XEXP (ptr, 1) = unused_insn_list; + unused_insn_list = ptr; +} + +/* Remove and free corresponding to ELEM node in the INSN_LIST pointed to + by LISTP. */ +void +remove_free_INSN_LIST_elem (rtx elem, rtx *listp) +{ + free_INSN_LIST_node (remove_list_elem (elem, listp)); +} + +/* Remove and free the first node in the INSN_LIST pointed to by LISTP. */ +rtx +remove_free_INSN_LIST_node (rtx *listp) +{ + rtx node = *listp; + rtx elem = XEXP (node, 0); + + remove_list_node (listp); + free_INSN_LIST_node (node); + + return elem; +} + +/* Remove and free the first node in the EXPR_LIST pointed to by LISTP. */ +rtx +remove_free_EXPR_LIST_node (rtx *listp) +{ + rtx node = *listp; + rtx elem = XEXP (node, 0); + + remove_list_node (listp); + free_EXPR_LIST_node (node); + + return elem; +} + +#include "gt-lists.h" |