// RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV0 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V0 // RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV1 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V1 // RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV2 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V2 // RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV3 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V3 // RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV4 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V4 // RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV5 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V5 // RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV6 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V6 // RUN: %clang -x c -fsanitize=implicit-signed-integer-truncation %s -DV7 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V7 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV0 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V0 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV1 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V1 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV2 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V2 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV3 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V3 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV4 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V4 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV5 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V5 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV6 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V6 // RUN: %clang -x c++ -fsanitize=implicit-signed-integer-truncation %s -DV7 -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="implicit conversion" --check-prefixes=CHECK-V7 #include // Test plan: // * Two types - int and char // * Two signs - signed and unsigned // * Square that - we have input and output types. // Thus, there are total of (2*2)^2 == 16 tests. // These are all the possible variations/combinations of casts. // However, not all of them should result in the check. // So here, we *only* check which should and which should not result in checks. uint32_t convert_unsigned_int_to_unsigned_int(uint32_t x) { #line 100 return x; } uint8_t convert_unsigned_char_to_unsigned_char(uint8_t x) { #line 200 return x; } int32_t convert_signed_int_to_signed_int(int32_t x) { #line 300 return x; } int8_t convert_signed_char_to_signed_char(int8_t x) { #line 400 return x; } uint8_t convert_unsigned_int_to_unsigned_char(uint32_t x) { #line 500 return x; } uint32_t convert_unsigned_char_to_unsigned_int(uint8_t x) { #line 600 return x; } int32_t convert_unsigned_char_to_signed_int(uint8_t x) { #line 700 return x; } int32_t convert_signed_char_to_signed_int(int8_t x) { #line 800 return x; } int32_t convert_unsigned_int_to_signed_int(uint32_t x) { #line 900 return x; } uint32_t convert_signed_int_to_unsigned_int(int32_t x) { #line 1000 return x; } uint8_t convert_signed_int_to_unsigned_char(int32_t x) { #line 1100 return x; } uint8_t convert_signed_char_to_unsigned_char(int8_t x) { #line 1200 return x; } int8_t convert_unsigned_char_to_signed_char(uint8_t x) { #line 1300 return x; } uint32_t convert_signed_char_to_unsigned_int(int8_t x) { #line 1400 return x; } int8_t convert_unsigned_int_to_signed_char(uint32_t x) { #line 1500 return x; } int8_t convert_signed_int_to_signed_char(int32_t x) { #line 1600 return x; } #line 1111 // !!! int main() { // No bits set. convert_unsigned_int_to_unsigned_int(0); convert_unsigned_char_to_unsigned_char(0); convert_signed_int_to_signed_int(0); convert_signed_char_to_signed_char(0); convert_unsigned_int_to_unsigned_char(0); convert_unsigned_char_to_unsigned_int(0); convert_unsigned_char_to_signed_int(0); convert_signed_char_to_signed_int(0); convert_unsigned_int_to_signed_int(0); convert_signed_int_to_unsigned_int(0); convert_signed_int_to_unsigned_char(0); convert_signed_char_to_unsigned_char(0); convert_unsigned_char_to_signed_char(0); convert_signed_char_to_unsigned_int(0); convert_unsigned_int_to_signed_char(0); convert_signed_int_to_signed_char(0); // One lowest bit set. convert_unsigned_int_to_unsigned_int(1); convert_unsigned_char_to_unsigned_char(1); convert_signed_int_to_signed_int(1); convert_signed_char_to_signed_char(1); convert_unsigned_int_to_unsigned_char(1); convert_unsigned_char_to_unsigned_int(1); convert_unsigned_char_to_signed_int(1); convert_signed_char_to_signed_int(1); convert_unsigned_int_to_signed_int(1); convert_signed_int_to_unsigned_int(1); convert_signed_int_to_unsigned_char(1); convert_signed_char_to_unsigned_char(1); convert_unsigned_char_to_signed_char(1); convert_signed_char_to_unsigned_int(1); convert_unsigned_int_to_signed_char(1); convert_signed_int_to_signed_char(1); #if defined(V0) // All source bits set. convert_unsigned_int_to_unsigned_int((uint32_t)UINT32_MAX); convert_unsigned_char_to_unsigned_char((uint8_t)UINT8_MAX); convert_signed_int_to_signed_int((int32_t)(uint32_t)UINT32_MAX); convert_signed_char_to_signed_char((int8_t)UINT8_MAX); convert_unsigned_int_to_unsigned_char((uint32_t)UINT32_MAX); convert_unsigned_char_to_unsigned_int((uint8_t)UINT8_MAX); convert_unsigned_char_to_signed_int((uint8_t)UINT8_MAX); convert_signed_char_to_signed_int((int8_t)UINT8_MAX); convert_unsigned_int_to_signed_int((uint32_t)UINT32_MAX); convert_signed_int_to_unsigned_int((int32_t)(uint32_t)UINT32_MAX); convert_signed_int_to_unsigned_char((int32_t)(uint32_t)UINT32_MAX); // CHECK-V0: {{.*}}signed-integer-truncation.c:1100:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value -1 (32-bit, signed) to type '{{.*}}' (aka 'unsigned char') changed the value to 255 (8-bit, unsigned) convert_signed_char_to_unsigned_char((int8_t)UINT8_MAX); convert_unsigned_char_to_signed_char((uint8_t)UINT8_MAX); convert_signed_char_to_unsigned_int((int8_t)UINT8_MAX); convert_unsigned_int_to_signed_char((uint32_t)UINT32_MAX); convert_signed_int_to_signed_char((int32_t)(uint32_t)UINT32_MAX); #elif defined(V1) // Source 'Sign' bit set. convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MIN); convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MIN); convert_signed_int_to_signed_int((int32_t)(uint32_t)INT32_MIN); convert_signed_char_to_signed_char((int8_t)INT8_MIN); convert_unsigned_int_to_unsigned_char((uint32_t)INT32_MIN); convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MIN); convert_unsigned_char_to_signed_int((uint8_t)INT8_MIN); convert_signed_char_to_signed_int((int8_t)INT8_MIN); convert_unsigned_int_to_signed_int((uint32_t)INT32_MIN); convert_signed_int_to_unsigned_int((int32_t)(uint32_t)INT32_MIN); convert_signed_int_to_unsigned_char((int32_t)(uint32_t)INT32_MIN); // CHECK-V1: {{.*}}signed-integer-truncation.c:1100:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value -2147483648 (32-bit, signed) to type '{{.*}}' (aka 'unsigned char') changed the value to 0 (8-bit, unsigned) convert_signed_char_to_unsigned_char((int8_t)INT8_MIN); convert_unsigned_char_to_signed_char((uint8_t)INT8_MIN); convert_signed_char_to_unsigned_int((int8_t)INT8_MIN); convert_unsigned_int_to_signed_char((uint32_t)INT32_MIN); // CHECK-V1: {{.*}}signed-integer-truncation.c:1500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483648 (32-bit, unsigned) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to 0 (8-bit, signed) convert_signed_int_to_signed_char((int32_t)(uint32_t)INT32_MIN); // CHECK-V1: {{.*}}signed-integer-truncation.c:1600:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value -2147483648 (32-bit, signed) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to 0 (8-bit, signed) #elif defined(V2) // All bits except the source 'Sign' bit are set. convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MAX); convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MAX); convert_signed_int_to_signed_int((int32_t)(uint32_t)INT32_MAX); convert_signed_char_to_signed_char((int8_t)INT8_MAX); convert_unsigned_int_to_unsigned_char((uint32_t)INT32_MAX); convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MAX); convert_unsigned_char_to_signed_int((uint8_t)INT8_MAX); convert_signed_char_to_signed_int((int8_t)INT8_MAX); convert_unsigned_int_to_signed_int((uint32_t)INT32_MAX); convert_signed_int_to_unsigned_int((int32_t)(uint32_t)INT32_MAX); convert_signed_int_to_unsigned_char((int32_t)(uint32_t)INT32_MAX); // CHECK-V2: {{.*}}signed-integer-truncation.c:1100:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value 2147483647 (32-bit, signed) to type '{{.*}}' (aka 'unsigned char') changed the value to 255 (8-bit, unsigned) convert_signed_char_to_unsigned_char((int8_t)INT8_MAX); convert_unsigned_char_to_signed_char((uint8_t)INT8_MAX); convert_signed_char_to_unsigned_int((int8_t)INT8_MAX); convert_unsigned_int_to_signed_char((uint32_t)INT32_MAX); // CHECK-V2: {{.*}}signed-integer-truncation.c:1500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483647 (32-bit, unsigned) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -1 (8-bit, signed) convert_signed_int_to_signed_char((int32_t)(uint32_t)INT32_MAX); // CHECK-V2: {{.*}}signed-integer-truncation.c:1600:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value 2147483647 (32-bit, signed) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -1 (8-bit, signed) #elif defined(V3) // All destination bits set. convert_unsigned_int_to_unsigned_int((uint32_t)UINT8_MAX); convert_unsigned_char_to_unsigned_char((uint8_t)UINT8_MAX); convert_signed_int_to_signed_int((int32_t)(uint32_t)UINT8_MAX); convert_signed_char_to_signed_char((int8_t)UINT8_MAX); convert_unsigned_int_to_unsigned_char((uint32_t)UINT8_MAX); convert_unsigned_char_to_unsigned_int((uint8_t)UINT8_MAX); convert_unsigned_char_to_signed_int((uint8_t)UINT8_MAX); convert_signed_char_to_signed_int((int8_t)UINT8_MAX); convert_unsigned_int_to_signed_int((uint32_t)UINT8_MAX); convert_signed_int_to_unsigned_int((int32_t)(uint32_t)UINT8_MAX); convert_signed_int_to_unsigned_char((int32_t)(uint32_t)UINT8_MAX); convert_signed_char_to_unsigned_char((int8_t)UINT8_MAX); convert_unsigned_char_to_signed_char((uint8_t)UINT8_MAX); convert_signed_char_to_unsigned_int((int8_t)UINT8_MAX); convert_unsigned_int_to_signed_char((uint32_t)UINT8_MAX); // CHECK-V3: {{.*}}signed-integer-truncation.c:1500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 255 (32-bit, unsigned) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -1 (8-bit, signed) convert_signed_int_to_signed_char((int32_t)(uint32_t)UINT8_MAX); // CHECK-V3: {{.*}}signed-integer-truncation.c:1600:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value 255 (32-bit, signed) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -1 (8-bit, signed) #elif defined(V4) // Destination 'sign' bit set. convert_unsigned_int_to_unsigned_int((uint32_t)(uint8_t)INT8_MIN); convert_unsigned_char_to_unsigned_char((uint8_t)(uint8_t)INT8_MIN); convert_signed_int_to_signed_int((int32_t)(uint32_t)(uint8_t)INT8_MIN); convert_signed_char_to_signed_char((int8_t)(uint8_t)INT8_MIN); convert_unsigned_int_to_unsigned_char((uint32_t)(uint8_t)INT8_MIN); convert_unsigned_char_to_unsigned_int((uint8_t)(uint8_t)INT8_MIN); convert_unsigned_char_to_signed_int((uint8_t)(uint8_t)INT8_MIN); convert_signed_char_to_signed_int((int8_t)(uint8_t)INT8_MIN); convert_unsigned_int_to_signed_int((uint32_t)(uint8_t)INT8_MIN); convert_signed_int_to_unsigned_int((int32_t)(uint32_t)(uint8_t)INT8_MIN); convert_signed_int_to_unsigned_char((int32_t)(uint32_t)(uint8_t)INT8_MIN); convert_signed_char_to_unsigned_char((int8_t)(uint8_t)INT8_MIN); convert_unsigned_char_to_signed_char((uint8_t)(uint8_t)INT8_MIN); convert_signed_char_to_unsigned_int((int8_t)(uint8_t)INT8_MIN); convert_unsigned_int_to_signed_char((uint32_t)(uint8_t)INT8_MIN); // CHECK-V4: {{.*}}signed-integer-truncation.c:1500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 128 (32-bit, unsigned) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -128 (8-bit, signed) convert_signed_int_to_signed_char((int32_t)(uint32_t)(uint8_t)INT8_MIN); // CHECK-V4: {{.*}}signed-integer-truncation.c:1600:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value 128 (32-bit, signed) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -128 (8-bit, signed) #elif defined(V5) // All bits except the destination 'sign' bit are set. convert_unsigned_int_to_unsigned_int((~((uint32_t)(uint8_t)INT8_MIN))); convert_unsigned_char_to_unsigned_char((uint8_t)(uint8_t)INT8_MIN); convert_signed_int_to_signed_int((int32_t)(~((uint32_t)(uint8_t)INT8_MIN))); convert_signed_char_to_signed_char((int8_t)(uint8_t)INT8_MIN); convert_unsigned_int_to_unsigned_char((~((uint32_t)(uint8_t)INT8_MIN))); convert_unsigned_char_to_unsigned_int((uint8_t)(uint8_t)INT8_MIN); convert_unsigned_char_to_signed_int((uint8_t)(uint8_t)INT8_MIN); convert_signed_char_to_signed_int((int8_t)(uint8_t)INT8_MIN); convert_unsigned_int_to_signed_int((~((uint32_t)(uint8_t)INT8_MIN))); convert_signed_int_to_unsigned_int((int32_t)(~((uint32_t)(uint8_t)INT8_MIN))); convert_signed_int_to_unsigned_char((int32_t)(~((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V5: {{.*}}signed-integer-truncation.c:1100:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value -129 (32-bit, signed) to type '{{.*}}' (aka 'unsigned char') changed the value to 127 (8-bit, unsigned) convert_signed_char_to_unsigned_char((int8_t)(uint8_t)INT8_MIN); convert_unsigned_char_to_signed_char((uint8_t)(uint8_t)INT8_MIN); convert_signed_char_to_unsigned_int((int8_t)(uint8_t)INT8_MIN); convert_unsigned_int_to_signed_char((~((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V5: {{.*}}signed-integer-truncation.c:1500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 4294967167 (32-bit, unsigned) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to 127 (8-bit, signed) convert_signed_int_to_signed_char((int32_t)(~((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V5: {{.*}}signed-integer-truncation.c:1600:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value -129 (32-bit, signed) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to 127 (8-bit, signed) #elif defined(V6) // Only the source and destination sign bits are set. convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MIN); convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MIN); convert_signed_int_to_signed_int((int32_t)INT32_MIN); convert_signed_char_to_signed_char((int8_t)INT8_MIN); convert_unsigned_int_to_unsigned_char(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)); convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MIN); convert_unsigned_char_to_signed_int((uint8_t)INT8_MIN); convert_signed_char_to_signed_int((int8_t)INT8_MIN); convert_unsigned_int_to_signed_int((uint32_t)INT32_MIN); convert_signed_int_to_unsigned_int((uint32_t)INT32_MIN); convert_signed_int_to_unsigned_char((int32_t)(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V6: {{.*}}signed-integer-truncation.c:1100:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value -2147483520 (32-bit, signed) to type '{{.*}}' (aka 'unsigned char') changed the value to 128 (8-bit, unsigned) convert_signed_char_to_unsigned_char((int8_t)INT8_MIN); convert_unsigned_char_to_signed_char((uint8_t)INT8_MIN); convert_signed_char_to_unsigned_int((int8_t)INT8_MIN); convert_unsigned_int_to_signed_char((((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V6: {{.*}}signed-integer-truncation.c:1500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483776 (32-bit, unsigned) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -128 (8-bit, signed) convert_signed_int_to_signed_char((int32_t)(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V6: {{.*}}signed-integer-truncation.c:1600:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value -2147483520 (32-bit, signed) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to -128 (8-bit, signed) #elif defined(V7) // All bits except the source and destination sign bits are set. convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MAX); convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MAX); convert_signed_int_to_signed_int((int32_t)INT32_MAX); convert_signed_char_to_signed_char((int8_t)INT8_MAX); convert_unsigned_int_to_unsigned_char(~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN))); convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MAX); convert_unsigned_char_to_signed_int((uint8_t)INT8_MAX); convert_signed_char_to_signed_int((int8_t)INT8_MAX); convert_unsigned_int_to_signed_int((uint32_t)INT32_MAX); convert_signed_int_to_unsigned_int((uint32_t)INT32_MAX); convert_signed_int_to_unsigned_char((int32_t)(~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)))); // CHECK-V7: {{.*}}signed-integer-truncation.c:1100:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value 2147483519 (32-bit, signed) to type '{{.*}}' (aka 'unsigned char') changed the value to 127 (8-bit, unsigned) convert_signed_char_to_unsigned_char((int8_t)INT8_MAX); convert_unsigned_char_to_signed_char((uint8_t)INT8_MAX); convert_signed_char_to_unsigned_int((int8_t)INT8_MAX); convert_unsigned_int_to_signed_char(~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V7: {{.*}}signed-integer-truncation.c:1500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483519 (32-bit, unsigned) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to 127 (8-bit, signed) convert_signed_int_to_signed_char((int32_t)~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN))); // CHECK-V7: {{.*}}signed-integer-truncation.c:1600:10: runtime error: implicit conversion from type '{{.*}}' (aka 'int') of value 2147483519 (32-bit, signed) to type '{{.*}}' (aka '{{(signed )?}}char') changed the value to 127 (8-bit, signed) #else #error Some V* needs to be defined! #endif return 0; }