diff options
| author | eraman <eraman@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-04-20 18:34:59 +0000 |
|---|---|---|
| committer | eraman <eraman@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-04-20 18:34:59 +0000 |
| commit | 6a818150658228678dfd91bb919c6bd603b943fa (patch) | |
| tree | 82b888cb47014836fd0f723d4bff154d61225312 /gcc/cfgexpand.c | |
| parent | 452f8ae3fc5d9dfc8ede58636e43c7d3d5af996a (diff) | |
| download | gcc-6a818150658228678dfd91bb919c6bd603b943fa.tar.gz | |
2011-04-20 Easwaran Raman <eraman@google.com>
* cfgexpand.c (add_alias_set_conflicts): Add conflicts with a variable
containing union type only with -fstrict-aliasing.
2011-04-20 Easwaran Raman <eraman@google.com>
* gcc.dg/stack-layout-1.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@172788 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index a3abc8497df..e88bec14945 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -373,8 +373,9 @@ add_alias_set_conflicts (void) to elements will conflict. In case of unions we have to be careful as type based aliasing rules may say access to the same memory does not conflict. So play - safe and add a conflict in this case. */ - || contains_union) + safe and add a conflict in this case when + -fstrict-aliasing is used. */ + || (contains_union && flag_strict_aliasing)) add_stack_var_conflict (i, j); } } |