py: Introduce MP_UNREACHABLE macro to annotate unreachable code.

And use it to replace the same pattern at the end of nlrthumb.c:nlr_jump.
crypto-aes
Damien George 4 years ago committed by Scott Shawcroft
parent 887f64eed8
commit 63046d800d
No known key found for this signature in database
GPG Key ID: 9349BC7E64B1921E

@ -1440,6 +1440,15 @@ typedef double mp_float_t;
#define MP_UNLIKELY(x) __builtin_expect((x), 0)
#endif
// To annotate that code is unreachable
#ifndef MP_UNREACHABLE
#if defined(__GNUC__)
#define MP_UNREACHABLE __builtin_unreachable();
#else
#define MP_UNREACHABLE for (;;);
#endif
#endif
#ifndef MP_HTOBE16
#if MP_ENDIANNESS_LITTLE
# define MP_HTOBE16(x) ((uint16_t)( (((x) & 0xff) << 8) | (((x) >> 8) & 0xff) ))

@ -127,11 +127,7 @@ NORETURN void nlr_jump(void *val) {
: // clobbered registers
);
#if defined(__GNUC__)
__builtin_unreachable();
#else
for (;;); // needed to silence compiler warning
#endif
MP_UNREACHABLE
}
#endif // MICROPY_NLR_THUMB

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