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