diff options
| author | Richard Guenther <rguenther@suse.de> | 2011-09-26 12:58:35 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2011-09-26 12:58:35 +0000 |
| commit | f8a7df459498f6e5c3308e9e3de3252dccecff9a (patch) | |
| tree | 851dba3ea227d9d83fa999a66f6e3c047a8e9978 /gcc/gimple-fold.c | |
| parent | b5bcaa4a74c02648eb45c015ff03c15cdac82fe1 (diff) | |
| download | gcc-f8a7df459498f6e5c3308e9e3de3252dccecff9a.zip gcc-f8a7df459498f6e5c3308e9e3de3252dccecff9a.tar.gz gcc-f8a7df459498f6e5c3308e9e3de3252dccecff9a.tar.bz2 | |
re PR tree-optimization/50472 (Volatile qualification in data is not enough to avoid optimization over pointer to data)
2011-09-26 Richard Guenther <rguenther@suse.de>
PR tree-optimization/50472
* gimple-fold.c (fold_const_aggregate_ref_1): Do not fold
volatile references.
* gcc.dg/torture/pr50472.c: New testcase.
From-SVN: r179196
Diffstat (limited to 'gcc/gimple-fold.c')
| -rw-r--r-- | gcc/gimple-fold.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c index b481c4a..d754ea9 100644 --- a/gcc/gimple-fold.c +++ b/gcc/gimple-fold.c @@ -2919,6 +2919,9 @@ fold_const_aggregate_ref_1 (tree t, tree (*valueize) (tree)) HOST_WIDE_INT offset, size, max_size; tree tem; + if (TREE_THIS_VOLATILE (t)) + return NULL_TREE; + if (TREE_CODE_CLASS (TREE_CODE (t)) == tcc_declaration) return get_symbol_constant_value (t); |