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// RUN: %clangxx -fsanitize=float-cast-overflow %s -o %t
// RUN: %t _
// RUN: %t 0 2>&1 | FileCheck %s --check-prefix=CHECK-0
// RUN: %t 1 2>&1 | FileCheck %s --check-prefix=CHECK-1
// RUN: %t 2 2>&1 | FileCheck %s --check-prefix=CHECK-2
// RUN: %t 3 2>&1 | FileCheck %s --check-prefix=CHECK-3
// RUN: %t 4 2>&1 | FileCheck %s --check-prefix=CHECK-4
// RUN: %t 5 2>&1 | FileCheck %s --check-prefix=CHECK-5
// RUN: %t 6 2>&1 | FileCheck %s --check-prefix=CHECK-6
// FIXME: %t 7 2>&1 | FileCheck %s --check-prefix=CHECK-7
// RUN: %t 8 2>&1 | FileCheck %s --check-prefix=CHECK-8
// This test assumes float and double are IEEE-754 single- and double-precision.
#include <stdint.h>
#include <stdio.h>
#include <string.h>
float Inf;
float NaN;
int main(int argc, char **argv) {
float MaxFloatRepresentableAsInt = 0x7fffff80;
(int)MaxFloatRepresentableAsInt; // ok
(int)-MaxFloatRepresentableAsInt; // ok
float MinFloatRepresentableAsInt = -0x7fffffff - 1;
(int)MinFloatRepresentableAsInt; // ok
float MaxFloatRepresentableAsUInt = 0xffffff00u;
(unsigned int)MaxFloatRepresentableAsUInt; // ok
#ifdef __SIZEOF_INT128__
unsigned __int128 FloatMaxAsUInt128 = -((unsigned __int128)1 << 104);
(void)(float)FloatMaxAsUInt128; // ok
#endif
float NearlyMinusOne = -0.99999;
unsigned Zero = NearlyMinusOne; // ok
// Build a '+Inf'.
char InfVal[] = { 0x00, 0x00, 0x80, 0x7f };
float Inf;
memcpy(&Inf, InfVal, 4);
// Build a 'NaN'.
char NaNVal[] = { 0x01, 0x00, 0x80, 0x7f };
float NaN;
memcpy(&NaN, NaNVal, 4);
double DblInf = (double)Inf; // ok
switch (argv[1][0]) {
// FIXME: Produce a source location for these checks and test for it here.
// Floating point -> integer overflow.
case '0':
// Note that values between 0x7ffffe00 and 0x80000000 may or may not
// successfully round-trip, depending on the rounding mode.
// CHECK-0: runtime error: value 2.14748{{.*}} is outside the range of representable values of type 'int'
return MaxFloatRepresentableAsInt + 0x80;
case '1':
// CHECK-1: runtime error: value -2.14748{{.*}} is outside the range of representable values of type 'int'
return MinFloatRepresentableAsInt - 0x100;
case '2':
// CHECK-2: runtime error: value -1 is outside the range of representable values of type 'unsigned int'
return (unsigned)-1.0;
case '3':
// CHECK-3: runtime error: value 4.2949{{.*}} is outside the range of representable values of type 'unsigned int'
return (unsigned)(MaxFloatRepresentableAsUInt + 0x100);
case '4':
// CHECK-4: runtime error: value {{.*}} is outside the range of representable values of type 'int'
return Inf;
case '5':
// CHECK-5: runtime error: value {{.*}} is outside the range of representable values of type 'int'
return NaN;
// Integer -> floating point overflow.
case '6':
// CHECK-6: {{runtime error: value 0xffffff00000000000000000000000001 is outside the range of representable values of type 'float'|__int128 not supported}}
#ifdef __SIZEOF_INT128__
return (float)(FloatMaxAsUInt128 + 1);
#else
puts("__int128 not supported");
return 0;
#endif
// FIXME: The backend cannot lower __fp16 operations on x86 yet.
//case '7':
// (__fp16)65504; // ok
// // CHECK-7: runtime error: value 65505 is outside the range of representable values of type '__fp16'
// return (__fp16)65505;
// Floating point -> floating point overflow.
case '8':
// CHECK-8: runtime error: value 1e+39 is outside the range of representable values of type 'float'
return (float)1e39;
}
}
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