1 // FIXME: run this (and other) UBSan tests in both 32- and 64-bit modes (?). 2 // RUN: %clangxx -fsanitize=float-cast-overflow %s -o %t 3 // RUN: %run %t _ 4 // RUN: %run %t 0 2>&1 | FileCheck %s --check-prefix=CHECK-0 5 // RUN: %run %t 1 2>&1 | FileCheck %s --check-prefix=CHECK-1 6 // RUN: %run %t 2 2>&1 | FileCheck %s --check-prefix=CHECK-2 7 // RUN: %run %t 3 2>&1 | FileCheck %s --check-prefix=CHECK-3 8 // RUN: %run %t 4 2>&1 | FileCheck %s --check-prefix=CHECK-4 9 // RUN: %run %t 5 2>&1 | FileCheck %s --check-prefix=CHECK-5 10 // RUN: %run %t 6 2>&1 | FileCheck %s --check-prefix=CHECK-6 11 // FIXME: %run %t 7 2>&1 | FileCheck %s --check-prefix=CHECK-7 12 // FIXME: not %run %t 8 2>&1 | FileCheck %s --check-prefix=CHECK-8 13 // RUN: not %run %t 9 2>&1 | FileCheck %s --check-prefix=CHECK-9 14 15 // This test assumes float and double are IEEE-754 single- and double-precision. 16 17 #if defined(__APPLE__) 18 # include <machine/endian.h> 19 # define BYTE_ORDER __DARWIN_BYTE_ORDER 20 # define BIG_ENDIAN __DARWIN_BIG_ENDIAN 21 # define LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN 22 #elif defined(__FreeBSD__) 23 # include <sys/endian.h> 24 # define BYTE_ORDER _BYTE_ORDER 25 # define BIG_ENDIAN _BIG_ENDIAN 26 # define LITTLE_ENDIAN _LITTLE_ENDIAN 27 #else 28 # include <endian.h> 29 # define BYTE_ORDER __BYTE_ORDER 30 # define BIG_ENDIAN __BIG_ENDIAN 31 # define LITTLE_ENDIAN __LITTLE_ENDIAN 32 #endif // __APPLE__ 33 #include <stdint.h> 34 #include <stdio.h> 35 #include <string.h> 36 37 float Inf; 38 float NaN; 39 40 int main(int argc, char **argv) { 41 float MaxFloatRepresentableAsInt = 0x7fffff80; 42 (int)MaxFloatRepresentableAsInt; // ok 43 (int)-MaxFloatRepresentableAsInt; // ok 44 45 float MinFloatRepresentableAsInt = -0x7fffffff - 1; 46 (int)MinFloatRepresentableAsInt; // ok 47 48 float MaxFloatRepresentableAsUInt = 0xffffff00u; 49 (unsigned int)MaxFloatRepresentableAsUInt; // ok 50 51 #ifdef __SIZEOF_INT128__ 52 unsigned __int128 FloatMaxAsUInt128 = -((unsigned __int128)1 << 104); 53 (void)(float)FloatMaxAsUInt128; // ok 54 #endif 55 56 float NearlyMinusOne = -0.99999; 57 unsigned Zero = NearlyMinusOne; // ok 58 59 // Build a '+Inf'. 60 #if BYTE_ORDER == LITTLE_ENDIAN 61 char InfVal[] = { 0x00, 0x00, 0x80, 0x7f }; 62 #else 63 char InfVal[] = { 0x7f, 0x80, 0x00, 0x00 }; 64 #endif 65 float Inf; 66 memcpy(&Inf, InfVal, 4); 67 68 // Build a 'NaN'. 69 #if BYTE_ORDER == LITTLE_ENDIAN 70 char NaNVal[] = { 0x01, 0x00, 0x80, 0x7f }; 71 #else 72 char NaNVal[] = { 0x7f, 0x80, 0x00, 0x01 }; 73 #endif 74 float NaN; 75 memcpy(&NaN, NaNVal, 4); 76 77 double DblInf = (double)Inf; // ok 78 79 switch (argv[1][0]) { 80 // FIXME: Produce a source location for these checks and test for it here. 81 82 // Floating point -> integer overflow. 83 case '0': { 84 // Note that values between 0x7ffffe00 and 0x80000000 may or may not 85 // successfully round-trip, depending on the rounding mode. 86 // CHECK-0: runtime error: value 2.14748{{.*}} is outside the range of representable values of type 'int' 87 static int test_int = MaxFloatRepresentableAsInt + 0x80; 88 return 0; 89 } 90 case '1': { 91 // CHECK-1: runtime error: value -2.14748{{.*}} is outside the range of representable values of type 'int' 92 static int test_int = MinFloatRepresentableAsInt - 0x100; 93 return 0; 94 } 95 case '2': { 96 // CHECK-2: runtime error: value -1 is outside the range of representable values of type 'unsigned int' 97 volatile float f = -1.0; 98 volatile unsigned u = (unsigned)f; 99 return 0; 100 } 101 case '3': { 102 // CHECK-3: runtime error: value 4.2949{{.*}} is outside the range of representable values of type 'unsigned int' 103 static int test_int = (unsigned)(MaxFloatRepresentableAsUInt + 0x100); 104 return 0; 105 } 106 107 case '4': { 108 // CHECK-4: runtime error: value {{.*}} is outside the range of representable values of type 'int' 109 static int test_int = Inf; 110 return 0; 111 } 112 case '5': { 113 // CHECK-5: runtime error: value {{.*}} is outside the range of representable values of type 'int' 114 static int test_int = NaN; 115 return 0; 116 } 117 118 // Integer -> floating point overflow. 119 case '6': { 120 // CHECK-6: {{runtime error: value 0xffffff00000000000000000000000001 is outside the range of representable values of type 'float'|__int128 not supported}} 121 #ifdef __SIZEOF_INT128__ 122 static int test_int = (float)(FloatMaxAsUInt128 + 1); 123 return 0; 124 #else 125 puts("__int128 not supported"); 126 return 0; 127 #endif 128 } 129 // FIXME: The backend cannot lower __fp16 operations on x86 yet. 130 //case '7': 131 // (__fp16)65504; // ok 132 // // CHECK-7: runtime error: value 65505 is outside the range of representable values of type '__fp16' 133 // return (__fp16)65505; 134 135 // Floating point -> floating point overflow. 136 case '8': 137 // CHECK-8: runtime error: value 1e+39 is outside the range of representable values of type 'float' 138 return (float)1e39; 139 case '9': 140 volatile long double ld = 300.0; 141 // CHECK-9: runtime error: value 300 is outside the range of representable values of type 'char' 142 char c = ld; 143 return c; 144 } 145 } 146