Mercurial > hg > CbC > CbC_gcc
diff gcc/tree-ssanames.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
---|---|
date | Fri, 12 Feb 2010 23:39:51 +0900 |
parents | a06113de4d67 |
children | b7f97abdc517 |
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--- a/gcc/tree-ssanames.c Sun Feb 07 18:28:00 2010 +0900 +++ b/gcc/tree-ssanames.c Fri Feb 12 23:39:51 2010 +0900 @@ -1,18 +1,19 @@ /* Generic routines for manipulating SSA_NAME expressions - Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. - + Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009 + 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/>. */ @@ -29,7 +30,7 @@ /* Rewriting a function into SSA form can create a huge number of SSA_NAMEs, many of which may be thrown away shortly after their creation if jumps - were threaded through PHI nodes. + were threaded through PHI nodes. While our garbage collection mechanisms will handle this situation, it is extremely wasteful to create nodes and throw them away, especially @@ -43,7 +44,7 @@ Right now we maintain our free list on a per-function basis. It may or may not make sense to maintain the free list for the duration of - a compilation unit. + a compilation unit. External code should rely solely upon HIGHEST_SSA_VERSION and the externally defined functions. External code should not know about @@ -87,6 +88,8 @@ least 50 elements reserved in it. */ VEC_quick_push (tree, SSANAMES (fn), NULL_TREE); FREE_SSANAMES (fn) = NULL; + + SYMS_TO_RENAME (fn) = BITMAP_GGC_ALLOC (); } /* Finalize management of SSA_NAMEs. */ @@ -163,7 +166,7 @@ /* We no longer need the SSA_NAME expression VAR, release it so that - it may be reused. + it may be reused. Note it is assumed that no calls to make_ssa_name will be made until all uses of the ssa name are released and that the only @@ -192,7 +195,7 @@ /* release_ssa_name can be called multiple times on a single SSA_NAME. However, it should only end up on our free list one time. We keep a status bit in the SSA_NAME node itself to indicate it has - been put on the free list. + been put on the free list. Note that once on the freelist you can not reference the SSA_NAME's defining statement. */ @@ -202,6 +205,9 @@ int saved_ssa_name_version = SSA_NAME_VERSION (var); use_operand_p imm = &(SSA_NAME_IMM_USE_NODE (var)); + if (MAY_HAVE_DEBUG_STMTS) + insert_debug_temp_for_var_def (NULL, var); + #ifdef ENABLE_CHECKING verify_imm_links (stderr, var); #endif @@ -268,12 +274,6 @@ new_ptr_info = GGC_NEW (struct ptr_info_def); *new_ptr_info = *ptr_info; - if (ptr_info->pt_vars) - { - new_ptr_info->pt_vars = BITMAP_GGC_ALLOC (); - bitmap_copy (new_ptr_info->pt_vars, ptr_info->pt_vars); - } - SSA_NAME_PTR_INFO (name) = new_ptr_info; } @@ -353,7 +353,7 @@ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ - 0, /* tv_id */ + TV_NONE, /* tv_id */ PROP_ssa, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */