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| author | Richard Guenther <rguenther@suse.de> | 2008-03-30 14:56:28 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2008-03-30 14:56:28 +0000 |
| commit | 9664860331e02d839e4cb38e750d7027846524d8 (patch) | |
| tree | 9d8e77bcbffd0b674ab6dd53b854bc1de6bab194 /gcc/fold-const.c | |
| parent | 23d1b451d0d02e953eaffadd977fca12d93a780a (diff) | |
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re PR middle-end/31023 (Fold is agnostic of integer sub-types)
2008-03-30 Richard Guenther <rguenther@suse.de>
PR middle-end/31023
* fold-const.c (fold_sign_changed_comparison): Do leave
conversions to base-types alone.
From-SVN: r133731
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 5d5d7cf..c420b79 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -6807,6 +6807,11 @@ fold_sign_changed_comparison (enum tree_code code, tree type, if (TYPE_PRECISION (inner_type) != TYPE_PRECISION (outer_type)) return NULL_TREE; + /* If the conversion is from an integral subtype to its basetype + leave it alone. */ + if (TREE_TYPE (inner_type) == outer_type) + return NULL_TREE; + if (TREE_CODE (arg1) != INTEGER_CST && !((TREE_CODE (arg1) == NOP_EXPR || TREE_CODE (arg1) == CONVERT_EXPR) |