PR middle-end/45034
* convert.c (convert_to_integer): Always use an unsigned
type for narrowed negate and bitwise not.
* gcc.c-torture/execute/pr45034.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@162673
138bc75d-0d04-0410-961f-
82ee72b054a4
+2010-07-29 Richard Guenther <rguenther@suse.de>
+
+ PR middle-end/45034
+ * convert.c (convert_to_integer): Always use an unsigned
+ type for narrowed negate and bitwise not.
+
2010-07-29 Ira Rosen <irar@il.ibm.com>
* tree-vect-loop.c (vect_create_epilog_for_reduction): Switch
/* This is not correct for ABS_EXPR,
since we must test the sign before truncation. */
{
- tree typex;
-
- /* Don't do unsigned arithmetic where signed was wanted,
- or vice versa. */
- if (TYPE_UNSIGNED (TREE_TYPE (expr)))
- typex = unsigned_type_for (type);
- else
- typex = signed_type_for (type);
+ tree typex = unsigned_type_for (type);
return convert (type,
fold_build1 (ex_form, typex,
convert (typex,
+2010-07-29 Richard Guenther <rguenther@suse.de>
+
+ PR middle-end/45034
+ * gcc.c-torture/execute/pr45034.c: New testcase.
+
2010-07-28 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/45096
--- /dev/null
+extern void abort (void);
+static void fixnum_neg(signed char x, signed char *py, int *pv)
+{
+ unsigned char ux, uy;
+
+ ux = (unsigned char)x;
+ uy = -ux;
+ *py = (uy <= 127) ? (signed char)uy : (-(signed char)(255 - uy) - 1);
+ *pv = (x == -128) ? 1 : 0;
+}
+
+void __attribute__((noinline)) foo(int x, int y, int v)
+{
+ if (y < -128 || y > 127)
+ abort();
+}
+
+int test_neg(void)
+{
+ signed char x, y;
+ int v, err;
+
+ err = 0;
+ x = -128;
+ for (;;) {
+ fixnum_neg(x, &y, &v);
+ foo((int)x, (int)y, v);
+ if ((v && x != -128) || (!v && x == -128))
+ ++err;
+ if (x == 127)
+ break;
+ ++x;
+ }
+ return err;
+}
+
+int main(void)
+{
+ if (sizeof (char) != 1)
+ return 0;
+ if (test_neg() != 0)
+ abort();
+ return 0;
+}
+