Regtested on x86_64-linux with -m32/-m64.
Ok?
2013-12-17 Marek Polacek <pola...@redhat.com>
testsuite/
* c-c++-common/ubsan/overflow-int128.c: New test.
--- gcc/testsuite/c-c++-common/ubsan/overflow-int128.c.mp 2013-12-17
16:54:28.123468111 +0100
+++ gcc/testsuite/c-c++-common/ubsan/overflow-int128.c 2013-12-17
18:07:19.539221035 +0100
@@ -0,0 +1,48 @@
+/* { dg-do run } */
+/* { dg-require-effective-target int128 } */
+/* { dg-options "-fsanitize=signed-integer-overflow -Wno-overflow" } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
+
+/* 2^127 - 1 */
+#define INT128_MAX (((__int128) 1 << ((__SIZEOF_INT128__ * __CHAR_BIT__) - 1))
- 1)
+#define INT128_MIN (-INT128_MAX - 1)
+
+int
+main (void)
+{
+ volatile __int128 i = INT128_MAX;
+ volatile __int128 j = 1;
+ volatile __int128 k = i + j;
+ k = j + i;
+ i++;
+ j = INT128_MAX - 100;
+ j += (1 << 10);
+
+ j = INT128_MIN;
+ i = -1;
+ k = i + j;
+ k = j + i;
+ j--;
+ j = INT128_MIN + 100;
+ j += -(1 << 10);
+
+ i = INT128_MAX;
+ j = 2;
+ k = i * j;
+
+ i = INT128_MIN;
+ i = -i;
+
+ return 0;
+}
+
+/* { dg-output "signed integer overflow: 0x7fffffffffffffffffffffffffffffff
\\+ 1 cannot be represented in type '__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow: 1 \\+
0x7fffffffffffffffffffffffffffffff cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow:
0x7fffffffffffffffffffffffffffffff \\+ 1 cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow:
0x7fffffffffffffffffffffffffffff9b \\+ 1024 cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow: -1 \\+
0x80000000000000000000000000000000 cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow:
0x80000000000000000000000000000000 \\+ -1 cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow:
0x80000000000000000000000000000000 \\+ -1 cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow:
0x80000000000000000000000000000064 \\+ -1024 cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*signed integer overflow:
0x7fffffffffffffffffffffffffffffff \\* 2 cannot be represented in type
'__int128'(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*negation of 0x80000000000000000000000000000000 cannot
be represented in type '__int128'; cast to an unsigned type to negate this
value to itself(\n|\r\n|\r)" } */
Marek
