More overflow-negate-* testing.

From-SVN: r205992

gcc/testsuite/ChangeLog

+2013-12-14  Marek Polacek  <polacek@redhat.com>
+
+	* c-c++-common/ubsan/overflow-negate-1.c: Add more testing.  Don't
+	require int128 target.
+	* c-c++-common/ubsan/overflow-negate-2.c: New test.
+
 2013-12-14  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/59502

gcc/testsuite/c-c++-common/ubsan/overflow-negate-1.c

-/* { dg-do run { target int128 } } */
+/* { dg-do run } */
 /* { dg-options "-fsanitize=signed-integer-overflow -Wno-unused-variable" } */
 /* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
 
 #define INT_MIN (-__INT_MAX__ - 1)
+#define LONG_MIN (-__LONG_MAX__ - 1L)
+#define LLONG_MIN (-__LONG_LONG_MAX__ - 1LL)
 
 int
 main (void)
 {
-  int j = INT_MIN;
-  return -j;
+  int e = 1, f = -1;
+  volatile int i = INT_MIN;
+  volatile int i2 = i & (((((((-i) + 1) - 1) + 1) - 1) + 1) - 1);
+  i2 = -(i + e + f);
+  i = -i;
+
+  volatile long int li = LONG_MIN;
+  volatile long int li2 = li & (((((((-li) + 1) - 1) + 1) - 1) + 1) - 1);
+  li2 = -(li + e + f);
+  li = -li;
+
+  volatile long long int lli = LLONG_MIN;
+  volatile long long int lli2 = lli & (((((((-lli) + 1) - 1) + 1) - 1) + 1) - 1);
+  lli2 = -(lli + e + f);
+  lli = -lli;
+
+  return 0;
 }
 
 /* { dg-output "negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -\[^\n\r]* cannot be represented in type 'long int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -\[^\n\r]* cannot be represented in type 'long int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -\[^\n\r]* cannot be represented in type 'long int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -9223372036854775808 cannot be represented in type 'long long int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -9223372036854775808 cannot be represented in type 'long long int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of -9223372036854775808 cannot be represented in type 'long long int'; cast to an unsigned type to negate this value to itself(\n|\r\n|\r)" } */

gcc/testsuite/c-c++-common/ubsan/overflow-negate-2.c

+/* { dg-do run } */
+/* { dg-options "-fsanitize=signed-integer-overflow -Wno-unused-variable" } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
+
+#define SCHAR_MIN (-__SCHAR_MAX__ - 1)
+#define SHRT_MIN (-__SHRT_MAX__ - 1)
+#define INT_MIN (-__INT_MAX__ - 1)
+#define LONG_MIN (-__LONG_MAX__ - 1L)
+#define LLONG_MIN (-__LONG_LONG_MAX__ - 1LL)
+
+#define CHECK(A, B) ({ if ((A) != (B)) __builtin_abort (); })
+
+int
+main (void)
+{
+  volatile char c = -SCHAR_MIN;
+  CHECK (c, -128);
+
+  volatile short s = -SHRT_MIN;
+  CHECK (s, -32768);
+
+  volatile int i = INT_MIN;
+  i = -(unsigned) i;
+  CHECK (i, -0x80000000);
+
+  volatile long int li = LONG_MIN;
+  li = -(unsigned long) li;
+#if __LONG_MAX__ == 2147483647L
+  CHECK (li, -0x80000000L);
+#elif __LONG_MAX__ == 9223372036854775807L
+  CHECK (li, -0x8000000000000000L);
+#endif
+
+  volatile long long lli = LLONG_MIN;
+  lli = -(unsigned long long) lli;
+  CHECK (lli, -0x8000000000000000L);
+
+  return 0;
+}