On 6/25/06, Eric Botcazou <[EMAIL PROTECTED]> wrote:
> So, something obviously wrong with > > struct max_alignment { > char c; > union { > HOST_WIDEST_INT i; > long double d; > } u; > }; > > /* The biggest alignment required. */ > > #define MAX_ALIGNMENT (offsetof (struct max_alignment, u)) > > for SPARC 32bit?I don't think so, the ABI says 8 in both cases. Note that bootstrap doesn't fail on SPARC/Solaris 2.[56] and (presumably) SPARC/Linux, which have HOST_WIDE_INT == 32, whereas SPARC/Solaris 7+ have HOST_WIDE_INT == 64. All are 32-bit compilers. Bootstrap doesn't fail on SPARC64/Solaris 7+ either, for which the ABI says 16 for the alignment in both cases. They are 64-bit compilers.
SPARC psABI3.0 (32bit version) defines long double as 8 byte aligned. SCD4.2, 64bit version, defines long double as 16 byte aligned with some caveat (which essentially says long double can be 8-byte aligned in some cases - fortran common block case - but the compiler should assume 16-byte unless it can prove otherwise). On 32bit ABI, there's also a possiblity of "double"s being only 4-byte aligned when a double is passed on the stack. I don't know enough about gcc's gc to know whether the above can trip it over, but the memory allocation (malloc and the likes) shouldn't be a problem as long as it returns 8-byte aligned block on 32bit and 16-byte aligned on 64bit. -- #pragma ident "Seongbae Park, compiler, http://seongbae.blogspot.com";
