1*7c3d14c8STreehugger Robot // RUN: %clangxx -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s 2*7c3d14c8STreehugger Robot 3*7c3d14c8STreehugger Robot #include <stdint.h> 4*7c3d14c8STreehugger Robot main()5*7c3d14c8STreehugger Robotint main() { 6*7c3d14c8STreehugger Robot // These promote to 'int'. 7*7c3d14c8STreehugger Robot (void)(int8_t(-2) * int8_t(0x7f)); 8*7c3d14c8STreehugger Robot (void)(int16_t(0x7fff) * int16_t(0x7fff)); 9*7c3d14c8STreehugger Robot (void)(uint16_t(0xffff) * int16_t(0x7fff)); 10*7c3d14c8STreehugger Robot (void)(uint16_t(0xffff) * uint16_t(0x8000)); 11*7c3d14c8STreehugger Robot 12*7c3d14c8STreehugger Robot // Not an unsigned overflow 13*7c3d14c8STreehugger Robot (void)(uint16_t(0xffff) * uint16_t(0x8001)); 14*7c3d14c8STreehugger Robot 15*7c3d14c8STreehugger Robot (void)(uint32_t(0xffffffff) * uint32_t(0x2)); 16*7c3d14c8STreehugger Robot // CHECK: umul-overflow.cpp:15:31: runtime error: unsigned integer overflow: 4294967295 * 2 cannot be represented in type 'unsigned int' 17*7c3d14c8STreehugger Robot 18*7c3d14c8STreehugger Robot return 0; 19*7c3d14c8STreehugger Robot } 20