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 // XFAIL: aarch64 18 19 #if defined(__APPLE__) 20 # include <machine/endian.h> 21 # define BYTE_ORDER __DARWIN_BYTE_ORDER 22 # define BIG_ENDIAN __DARWIN_BIG_ENDIAN 23 # define LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN 24 #elif defined(__FreeBSD__) 25 # include <sys/endian.h> 26 # define BYTE_ORDER _BYTE_ORDER 27 # define BIG_ENDIAN _BIG_ENDIAN 28 # define LITTLE_ENDIAN _LITTLE_ENDIAN 29 #else 30 # include <endian.h> 31 # define BYTE_ORDER __BYTE_ORDER 32 # define BIG_ENDIAN __BIG_ENDIAN 33 # define LITTLE_ENDIAN __LITTLE_ENDIAN 34 #endif // __APPLE__ 35 #include <stdint.h> 36 #include <stdio.h> 37 #include <string.h> 38 39 float Inf; 40 float NaN; 41 42 int main(int argc, char **argv) { 43 float MaxFloatRepresentableAsInt = 0x7fffff80; 44 (int)MaxFloatRepresentableAsInt; // ok 45 (int)-MaxFloatRepresentableAsInt; // ok 46 47 float MinFloatRepresentableAsInt = -0x7fffffff - 1; 48 (int)MinFloatRepresentableAsInt; // ok 49 50 float MaxFloatRepresentableAsUInt = 0xffffff00u; 51 (unsigned int)MaxFloatRepresentableAsUInt; // ok 52 53 #ifdef __SIZEOF_INT128__ 54 unsigned __int128 FloatMaxAsUInt128 = -((unsigned __int128)1 << 104); 55 (void)(float)FloatMaxAsUInt128; // ok 56 #endif 57 58 float NearlyMinusOne = -0.99999; 59 unsigned Zero = NearlyMinusOne; // ok 60 61 // Build a '+Inf'. 62 #if BYTE_ORDER == LITTLE_ENDIAN 63 char InfVal[] = { 0x00, 0x00, 0x80, 0x7f }; 64 #else 65 char InfVal[] = { 0x7f, 0x80, 0x00, 0x00 }; 66 #endif 67 float Inf; 68 memcpy(&Inf, InfVal, 4); 69 70 // Build a 'NaN'. 71 #if BYTE_ORDER == LITTLE_ENDIAN 72 char NaNVal[] = { 0x01, 0x00, 0x80, 0x7f }; 73 #else 74 char NaNVal[] = { 0x7f, 0x80, 0x00, 0x01 }; 75 #endif 76 float NaN; 77 memcpy(&NaN, NaNVal, 4); 78 79 double DblInf = (double)Inf; // ok 80 81 switch (argv[1][0]) { 82 // FIXME: Produce a source location for these checks and test for it here. 83 84 // Floating point -> integer overflow. 85 case '0': { 86 // Note that values between 0x7ffffe00 and 0x80000000 may or may not 87 // successfully round-trip, depending on the rounding mode. 88 // CHECK-0: runtime error: value 2.14748{{.*}} is outside the range of representable values of type 'int' 89 static int test_int = MaxFloatRepresentableAsInt + 0x80; 90 return 0; 91 } 92 case '1': 93 // CHECK-1: runtime error: value -2.14748{{.*}} is outside the range of representable values of type 'int' 94 return MinFloatRepresentableAsInt - 0x100; 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 return NaN; 115 116 // Integer -> floating point overflow. 117 case '6': { 118 // CHECK-6: {{runtime error: value 0xffffff00000000000000000000000001 is outside the range of representable values of type 'float'|__int128 not supported}} 119 #ifdef __SIZEOF_INT128__ 120 static int test_int = (float)(FloatMaxAsUInt128 + 1); 121 return 0; 122 #else 123 puts("__int128 not supported"); 124 return 0; 125 #endif 126 } 127 // FIXME: The backend cannot lower __fp16 operations on x86 yet. 128 //case '7': 129 // (__fp16)65504; // ok 130 // // CHECK-7: runtime error: value 65505 is outside the range of representable values of type '__fp16' 131 // return (__fp16)65505; 132 133 // Floating point -> floating point overflow. 134 case '8': 135 // CHECK-8: runtime error: value 1e+39 is outside the range of representable values of type 'float' 136 return (float)1e39; 137 case '9': 138 volatile long double ld = 300.0; 139 // CHECK-9: runtime error: value 300 is outside the range of representable values of type 'char' 140 char c = ld; 141 return c; 142 } 143 } 144