diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 21 |
1 files changed, 4 insertions, 17 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 936fcee..4f6c9c4 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -3788,31 +3788,18 @@ expand_builtin_stpncpy (tree exp, rtx) || !warn_stringop_overflow) return NULL_RTX; + /* The source and destination of the call. */ tree dest = CALL_EXPR_ARG (exp, 0); tree src = CALL_EXPR_ARG (exp, 1); - /* The number of bytes to write (not the maximum). */ + /* The exact number of bytes to write (not the maximum). */ tree len = CALL_EXPR_ARG (exp, 2); - /* The length of the source sequence. */ - tree slen = c_strlen (src, 1); - - /* Try to determine the range of lengths that the source expression - refers to. */ - tree lenrange[2]; - if (slen) - lenrange[0] = lenrange[1] = slen; - else - { - get_range_strlen (src, lenrange); - slen = lenrange[0]; - } + /* The size of the destination object. */ tree destsize = compute_objsize (dest, warn_stringop_overflow - 1); - /* The number of bytes to write is LEN but check_sizes will also - check SLEN if LEN's value isn't known. */ check_sizes (OPT_Wstringop_overflow_, - exp, len, /*maxlen=*/NULL_TREE, slen, destsize); + exp, len, /*maxlen=*/NULL_TREE, src, destsize); return NULL_RTX; } |