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[Bug middle-end/40141] [4.3 Regression] accessing aliased __m128 miscompiles
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 14 May 2009 14:50:23 -0000
- Subject: [Bug middle-end/40141] [4.3 Regression] accessing aliased __m128 miscompiles
- References: <bug-40141-17603@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from rguenth at gcc dot gnu dot org 2009-05-14 14:50 -------
For 4.4 this was fixed by
2008-04-29 Richard Guenther <rguenther@suse.de>
* tree-ssa-alias.c (finalize_ref_all_pointers): Remove.
(compute_may_aliases): Do not call finalize_ref_all_pointers.
(compute_flow_insensitive_aliasing): Do not treat
PTR_IS_REF_ALL pointers special.
(get_smt_for): Likewise.
(may_alias_p): Re-structure.
(is_escape_site): A ref-all pointer conversion is not an escape site.
* tree-ssa-structalias.c (find_what_p_points_to): Do not treat
PTR_IS_REF_ALL pointers special.
* tree-ssa-structalias.h (struct alias_info): Remove
ref_all_symbol_mem_tag field.
(PTR_IS_REF_ALL): Remove.
eventually exposing PRs 38151 and 38246. Which were fixed by
2008-11-25 Richard Guenther <rguenther@suse.de>
PR middle-end/38151
PR middle-end/38236
* tree-ssa-alias.c (struct alias_info): Remove written_vars.
Remove dereferenced_ptrs_store and dereferenced_ptrs_load
in favor of dereferenced_ptrs.
(init_alias_info): Adjust.
(delete_alias_info): Likewise.
(compute_flow_insensitive_aliasing): Properly
include all aliased variables.
(update_alias_info_1): Use dereferenced_ptrs.
(setup_pointers_and_addressables): Likewise.
(get_smt_for): Honor ref-all pointers and pointers with known alias
set properly.
* config/i386/i386.c (ix86_gimplify_va_arg): Use ref-all pointers.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40141