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| author | Jan Hubicka <jh@suse.cz> | 2019-06-22 17:32:51 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2019-06-22 15:32:51 +0000 |
| commit | 1240df7b4075f043a00c5314318f3bbf9af719e6 (patch) | |
| tree | afc8d42d6f812236b8cd6de35319555455c70d83 /gcc/tree-ssa-alias.c | |
| parent | 78f7607db4c53f8cfe4653a6c91c0328bc2854c3 (diff) | |
| download | gcc-1240df7b4075f043a00c5314318f3bbf9af719e6.zip gcc-1240df7b4075f043a00c5314318f3bbf9af719e6.tar.gz gcc-1240df7b4075f043a00c5314318f3bbf9af719e6.tar.bz2 | |
alias-access-path-6.c: New testcase.
* gcc.dg/tree-ssa/alias-access-path-6.c: New testcase.
* tree-ssa-alias.c (nonoverlapping_component_refs_p): Do not
give up on bitfields; continue searching for different refs
appearing later.
From-SVN: r272587
Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 111f375..3258315 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -1350,19 +1350,16 @@ nonoverlapping_component_refs_p (const_tree x, const_tree y) same. */ if (DECL_BIT_FIELD_REPRESENTATIVE (fieldx) == fieldy || DECL_BIT_FIELD_REPRESENTATIVE (fieldy) == fieldx) - { - ++alias_stats.nonoverlapping_component_refs_p_may_alias; - return false; - } + ; /* Different fields of the same record type cannot overlap. ??? Bitfields can overlap at RTL level so punt on them. */ - if (DECL_BIT_FIELD (fieldx) && DECL_BIT_FIELD (fieldy)) + else if (DECL_BIT_FIELD (fieldx) && DECL_BIT_FIELD (fieldy)) + ; + else { - ++alias_stats.nonoverlapping_component_refs_p_may_alias; - return false; + ++alias_stats.nonoverlapping_component_refs_p_no_alias; + return true; } - ++alias_stats.nonoverlapping_component_refs_p_no_alias; - return true; } } if (TYPE_UID (typex) < TYPE_UID (typey)) |