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 // XFAIL: armv7l-unknown-linux-gnueabihf 17 18 #if defined(__APPLE__) 19 # include <machine/endian.h> 20 # define BYTE_ORDER __DARWIN_BYTE_ORDER 21 # define BIG_ENDIAN __DARWIN_BIG_ENDIAN 22 # define LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN 23 #elif defined(__FreeBSD__) 24 # include <sys/endian.h> 25 # define BYTE_ORDER _BYTE_ORDER 26 # define BIG_ENDIAN _BIG_ENDIAN 27 # define LITTLE_ENDIAN _LITTLE_ENDIAN 28 #else 29 # include <endian.h> 30 # define BYTE_ORDER __BYTE_ORDER 31 # define BIG_ENDIAN __BIG_ENDIAN 32 # define LITTLE_ENDIAN __LITTLE_ENDIAN 33 #endif // __APPLE__ 34 #include <stdint.h> 35 #include <stdio.h> 36 #include <string.h> 37 38 float Inf; 39 float NaN; 40 41 int main(int argc, char **argv) { 42 float MaxFloatRepresentableAsInt = 0x7fffff80; 43 (int)MaxFloatRepresentableAsInt; // ok 44 (int)-MaxFloatRepresentableAsInt; // ok 45 46 float MinFloatRepresentableAsInt = -0x7fffffff - 1; 47 (int)MinFloatRepresentableAsInt; // ok 48 49 float MaxFloatRepresentableAsUInt = 0xffffff00u; 50 (unsigned int)MaxFloatRepresentableAsUInt; // ok 51 52 #ifdef __SIZEOF_INT128__ 53 unsigned __int128 FloatMaxAsUInt128 = -((unsigned __int128)1 << 104); 54 (void)(float)FloatMaxAsUInt128; // ok 55 #endif 56 57 float NearlyMinusOne = -0.99999; 58 unsigned Zero = NearlyMinusOne; // ok 59 60 // Build a '+Inf'. 61 #if BYTE_ORDER == LITTLE_ENDIAN 62 char InfVal[] = { 0x00, 0x00, 0x80, 0x7f }; 63 #else 64 char InfVal[] = { 0x7f, 0x80, 0x00, 0x00 }; 65 #endif 66 float Inf; 67 memcpy(&Inf, InfVal, 4); 68 69 // Build a 'NaN'. 70 #if BYTE_ORDER == LITTLE_ENDIAN 71 char NaNVal[] = { 0x01, 0x00, 0x80, 0x7f }; 72 #else 73 char NaNVal[] = { 0x7f, 0x80, 0x00, 0x01 }; 74 #endif 75 float NaN; 76 memcpy(&NaN, NaNVal, 4); 77 78 double DblInf = (double)Inf; // ok 79 80 switch (argv[1][0]) { 81 // FIXME: Produce a source location for these checks and test for it here. 82 83 // Floating point -> integer overflow. 84 case '0': 85 // Note that values between 0x7ffffe00 and 0x80000000 may or may not 86 // successfully round-trip, depending on the rounding mode. 87 // CHECK-0: runtime error: value 2.14748{{.*}} is outside the range of representable values of type 'int' 88 return MaxFloatRepresentableAsInt + 0x80; 89 case '1': 90 // CHECK-1: runtime error: value -2.14748{{.*}} is outside the range of representable values of type 'int' 91 return MinFloatRepresentableAsInt - 0x100; 92 case '2': { 93 // CHECK-2: runtime error: value -1 is outside the range of representable values of type 'unsigned int' 94 volatile float f = -1.0; 95 volatile unsigned u = (unsigned)f; 96 return 0; 97 } 98 case '3': 99 // CHECK-3: runtime error: value 4.2949{{.*}} is outside the range of representable values of type 'unsigned int' 100 return (unsigned)(MaxFloatRepresentableAsUInt + 0x100); 101 102 case '4': 103 // CHECK-4: runtime error: value {{.*}} is outside the range of representable values of type 'int' 104 return Inf; 105 case '5': 106 // CHECK-5: runtime error: value {{.*}} is outside the range of representable values of type 'int' 107 return NaN; 108 109 // Integer -> floating point overflow. 110 case '6': 111 // CHECK-6: {{runtime error: value 0xffffff00000000000000000000000001 is outside the range of representable values of type 'float'|__int128 not supported}} 112 #ifdef __SIZEOF_INT128__ 113 return (float)(FloatMaxAsUInt128 + 1); 114 #else 115 puts("__int128 not supported"); 116 return 0; 117 #endif 118 // FIXME: The backend cannot lower __fp16 operations on x86 yet. 119 //case '7': 120 // (__fp16)65504; // ok 121 // // CHECK-7: runtime error: value 65505 is outside the range of representable values of type '__fp16' 122 // return (__fp16)65505; 123 124 // Floating point -> floating point overflow. 125 case '8': 126 // CHECK-8: runtime error: value 1e+39 is outside the range of representable values of type 'float' 127 return (float)1e39; 128 case '9': 129 volatile long double ld = 300.0; 130 // CHECK-9: runtime error: value 300 is outside the range of representable values of type 'char' 131 char c = ld; 132 return c; 133 } 134 } 135