diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 8d4fc33..cdc5ceb 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -6338,10 +6338,17 @@ fold_builtin_constant_p (tree arglist) /* If we know this is a constant, emit the constant of one. */ if (CONSTANT_CLASS_P (arglist) || (TREE_CODE (arglist) == CONSTRUCTOR - && TREE_CONSTANT (arglist)) - || (TREE_CODE (arglist) == ADDR_EXPR - && TREE_CODE (TREE_OPERAND (arglist, 0)) == STRING_CST)) + && TREE_CONSTANT (arglist))) return integer_one_node; + if (TREE_CODE (arglist) == ADDR_EXPR) + { + tree op = TREE_OPERAND (arglist, 0); + if (TREE_CODE (op) == STRING_CST + || (TREE_CODE (op) == ARRAY_REF + && integer_zerop (TREE_OPERAND (op, 1)) + && TREE_CODE (TREE_OPERAND (op, 0)) == STRING_CST)) + return integer_one_node; + } /* If this expression has side effects, show we don't know it to be a constant. Likewise if it's a pointer or aggregate type since in |