diff options
Diffstat (limited to 'gcc/tree.h')
| -rw-r--r-- | gcc/tree.h | 11 |
1 files changed, 9 insertions, 2 deletions
@@ -1308,8 +1308,15 @@ struct tree_type #define DECL_SIZE_UNIT(NODE) (DECL_CHECK (NODE)->decl.size_unit) /* Holds the alignment required for the datum. */ #define DECL_ALIGN(NODE) (DECL_CHECK (NODE)->decl.u1.a.align) -/* For FIELD_DECLs, holds the alignment that DECL_FIELD_OFFSET has. */ -#define DECL_OFFSET_ALIGN(NODE) (FIELD_DECL_CHECK (NODE)->decl.u1.a.off_align) +/* For FIELD_DECLs, off_align holds the number of low-order bits of + DECL_FIELD_OFFSET which are known to be always zero. + DECL_OFFSET_ALIGN thus returns the alignment that DECL_FIELD_OFFSET + has. */ +#define DECL_OFFSET_ALIGN(NODE) \ + (((unsigned HOST_WIDE_INT)1) << FIELD_DECL_CHECK (NODE)->decl.u1.a.off_align) +/* Specify that DECL_ALIGN(NODE) is a multiple of X. */ +#define SET_DECL_OFFSET_ALIGN(NODE, X) \ + (FIELD_DECL_CHECK (NODE)->decl.u1.a.off_align = exact_log2 ((X) & -(X))) /* 1 if the alignment for this type was requested by "aligned" attribute, 0 if it is the default for this type. */ #define DECL_USER_ALIGN(NODE) (DECL_CHECK (NODE)->decl.user_align) |