diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index e112621..9e40296 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -8942,6 +8942,19 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0) } return NULL_TREE; + case INDIRECT_REF: + /* Fold *&X to X if X is an lvalue. */ + if (TREE_CODE (op0) == ADDR_EXPR) + { + tree op00 = TREE_OPERAND (op0, 0); + if ((TREE_CODE (op00) == VAR_DECL + || TREE_CODE (op00) == PARM_DECL + || TREE_CODE (op00) == RESULT_DECL) + && !TREE_READONLY (op00)) + return op00; + } + return NULL_TREE; + default: return NULL_TREE; } /* switch (code) */ |