https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41639
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>(tested on SH with a non-linux, in house runtime, implementation)
The bug is in your runtime implementation I think.
Which has a mismatch in the return type vs what GCC internals think these
should be.
Note libgcc/sync.c does:
```
#if SIZE == 1 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1
typedef unsigned int UQItype __attribute__((mode (QI)));
DEFINE (FN, 1, UQItype)
#elif SIZE == 2 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
typedef unsigned int UHItype __attribute__((mode (HI)));
DEFINE (FN, 2, UHItype)
#elif SIZE == 4 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
typedef unsigned int USItype __attribute__((mode (SI)));
DEFINE (FN, 4, USItype)
#elif SIZE == 8 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
typedef unsigned int UDItype __attribute__((mode (DI)));
DEFINE (FN, 8, UDItype)
#elif SIZE == 16 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
typedef unsigned int UOItype __attribute__((mode (OI)));
DEFINE (FN, 8, UOItype)
```
Which matches the internals of GCC.
