On Friday, July 22, 2005, at 11:07 AM, Chris Lattner wrote:
I'm trying to determine (in target-independent code) what the
*minimum* target alignment of a type is. For example, on darwin,
double's are normally 4-byte aligned, but are 8-byte aligned in some
cases (e.g. when they are the first element of a struct). TYPE_ALIGN
on a double returns 8 bytes, is there any way to find out that they
may end up being aligned to a 4-byte boundary?
I'm having a hard time with the simplicity of your question:
/* The alignment necessary for objects of this type.
The value is an int, measured in bits. */
#define TYPE_ALIGN(NODE) (TYPE_CHECK (NODE)->type.align)
/* 1 if the alignment for this type was requested by "aligned"
attribute,
0 if it is the default for this type. */
#define TYPE_USER_ALIGN(NODE) (TYPE_CHECK (NODE)->type.user_align)
/* The alignment for NODE, in bytes. */
#define TYPE_ALIGN_UNIT(NODE) (TYPE_ALIGN (NODE) / BITS_PER_UNIT)
? Certainly, I don't expect that to answer your question, but I don't
understand why.
