1*7c3d14c8STreehugger Robot // RUN: %clangxx -DSUB_I32 -fsanitize=unsigned-integer-overflow %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I32 2*7c3d14c8STreehugger Robot // RUN: %clangxx -DSUB_I64 -fsanitize=unsigned-integer-overflow %s -o %t2 && %run %t2 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I64 3*7c3d14c8STreehugger Robot // RUN: %clangxx -DSUB_I128 -fsanitize=unsigned-integer-overflow %s -o %t3 && %run %t3 2>&1 | FileCheck %s --check-prefix=CHECK-SUB_I128 4*7c3d14c8STreehugger Robot 5*7c3d14c8STreehugger Robot #include <stdint.h> 6*7c3d14c8STreehugger Robot #include <stdio.h> 7*7c3d14c8STreehugger Robot main()8*7c3d14c8STreehugger Robotint main() { 9*7c3d14c8STreehugger Robot // These promote to 'int'. 10*7c3d14c8STreehugger Robot (void)(uint8_t(0) - uint8_t(0x7f)); 11*7c3d14c8STreehugger Robot (void)(uint16_t(0) - uint16_t(0x7fff)); 12*7c3d14c8STreehugger Robot 13*7c3d14c8STreehugger Robot #ifdef SUB_I32 14*7c3d14c8STreehugger Robot (void)(uint32_t(1) - uint32_t(2)); 15*7c3d14c8STreehugger Robot // CHECK-SUB_I32: usub-overflow.cpp:[[@LINE-1]]:22: runtime error: unsigned integer overflow: 1 - 2 cannot be represented in type 'unsigned int' 16*7c3d14c8STreehugger Robot #endif 17*7c3d14c8STreehugger Robot 18*7c3d14c8STreehugger Robot #ifdef SUB_I64 19*7c3d14c8STreehugger Robot (void)(uint64_t(8000000000000000000ll) - uint64_t(9000000000000000000ll)); 20*7c3d14c8STreehugger Robot // CHECK-SUB_I64: 8000000000000000000 - 9000000000000000000 cannot be represented in type 'unsigned {{long( long)?}}' 21*7c3d14c8STreehugger Robot #endif 22*7c3d14c8STreehugger Robot 23*7c3d14c8STreehugger Robot #ifdef SUB_I128 24*7c3d14c8STreehugger Robot # if defined(__SIZEOF_INT128__) && !defined(_WIN32) 25*7c3d14c8STreehugger Robot (void)((__uint128_t(1) << 126) - (__uint128_t(1) << 127)); 26*7c3d14c8STreehugger Robot # else 27*7c3d14c8STreehugger Robot puts("__int128 not supported\n"); 28*7c3d14c8STreehugger Robot # endif 29*7c3d14c8STreehugger Robot // CHECK-SUB_I128: {{0x40000000000000000000000000000000 - 0x80000000000000000000000000000000 cannot be represented in type 'unsigned __int128'|__int128 not supported}} 30*7c3d14c8STreehugger Robot #endif 31*7c3d14c8STreehugger Robot } 32