Import compiler-rt r172839.

1 files changed, 32 insertions, 0 deletions

diff --git a/lib/ubsan/lit_tests/Integer/add-overflow.cpp b/lib/ubsan/lit_tests/Integer/add-overflow.cpp
new file mode 100644
index 0000000..8054352
--- /dev/null
+++ b/lib/ubsan/lit_tests/Integer/add-overflow.cpp
@@ -0,0 +1,32 @@
+// RUN: %clang -DADD_I32 -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=ADD_I32
+// RUN: %clang -DADD_I64 -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=ADD_I64
+// RUN: %clang -DADD_I128 -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=ADD_I128
+
+#include <stdint.h>
+#include <stdio.h>
+
+int main() {
+  // These promote to 'int'.
+  (void)(int8_t(0x7f) + int8_t(0x7f));
+  (void)(int16_t(0x3fff) + int16_t(0x4000));
+
+#ifdef ADD_I32
+  int32_t k = 0x12345678;
+  k += 0x789abcde;
+  // CHECK-ADD_I32: add-overflow.cpp:[[@LINE-1]]:5: runtime error: signed integer overflow: 305419896 + 2023406814 cannot be represented in type 'int'
+#endif
+
+#ifdef ADD_I64
+  (void)(int64_t(8000000000000000000ll) + int64_t(2000000000000000000ll));
+  // CHECK-ADD_I64: 8000000000000000000 + 2000000000000000000 cannot be represented in type '{{long( long)?}}'
+#endif
+
+#ifdef ADD_I128
+# ifdef __SIZEOF_INT128__
+  (void)((__int128_t(1) << 126) + (__int128_t(1) << 126));
+# else
+  puts("__int128 not supported");
+# endif
+  // CHECK-ADD_I128: {{0x40000000000000000000000000000000 \+ 0x40000000000000000000000000000000 cannot be represented in type '__int128'|__int128 not supported}}
+#endif
+}