diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 1a96c3f..8dddca1 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -7315,6 +7315,37 @@ native_encode_vector (const_tree expr, unsigned char *ptr, int len) } +/* Subroutine of native_encode_expr. Encode the STRING_CST + specified by EXPR into the buffer PTR of length LEN bytes. + Return the number of bytes placed in the buffer, or zero + upon failure. */ + +static int +native_encode_string (const_tree expr, unsigned char *ptr, int len) +{ + tree type = TREE_TYPE (expr); + HOST_WIDE_INT total_bytes; + + if (TREE_CODE (type) != ARRAY_TYPE + || TREE_CODE (TREE_TYPE (type)) != INTEGER_TYPE + || GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (type))) != BITS_PER_UNIT + || !host_integerp (TYPE_SIZE_UNIT (type), 0)) + return 0; + total_bytes = tree_low_cst (TYPE_SIZE_UNIT (type), 0); + if (total_bytes > len) + return 0; + if (TREE_STRING_LENGTH (expr) < total_bytes) + { + memcpy (ptr, TREE_STRING_POINTER (expr), TREE_STRING_LENGTH (expr)); + memset (ptr + TREE_STRING_LENGTH (expr), 0, + total_bytes - TREE_STRING_LENGTH (expr)); + } + else + memcpy (ptr, TREE_STRING_POINTER (expr), total_bytes); + return total_bytes; +} + + /* Subroutine of fold_view_convert_expr. Encode the INTEGER_CST, REAL_CST, COMPLEX_CST or VECTOR_CST specified by EXPR into the buffer PTR of length LEN bytes. Return the number of bytes @@ -7337,6 +7368,9 @@ native_encode_expr (const_tree expr, unsigned char *ptr, int len) case VECTOR_CST: return native_encode_vector (expr, ptr, len); + case STRING_CST: + return native_encode_string (expr, ptr, len); + default: return 0; } |