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