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builtins.c (fold_builtin_strncpy): Make sure len is a constant before comparing it as such.

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* builtins.c (fold_builtin_strncpy): Make sure len is a constant
before comparing it as such.

From-SVN: r84343
This commit is contained in:
Alexandre Oliva 2004-07-09 03:37:13 +00:00 • committed by Alexandre Oliva
parent 37369edcc9
commit 691e2db899
2 changed files with 10 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-07-09 Alexandre Oliva <aoliva@redhat.com>
* builtins.c (fold_builtin_strncpy): Make sure len is a constant
before comparing it as such.
2004-07-08 Richard Henderson <rth@redhat.com>
* builtins.c (std_gimplify_va_arg_expr): Hoist valist into a

5
gcc/builtins.c
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@ -7385,6 +7385,11 @@ fold_builtin_strncpy (tree exp, tree slen)
if (integer_zerop (len))
return omit_one_operand (TREE_TYPE (exp), dest, src);
/* We can't compare slen with len as constants below if len is not a
constant. */
if (len == 0 || TREE_CODE (len) != INTEGER_CST)
return 0;
if (!slen)
slen = c_strlen (src, 1);