diff options
Diffstat (limited to 'gcc/tree.h')
| -rw-r--r-- | gcc/tree.h | 30 |
1 files changed, 21 insertions, 9 deletions
@@ -916,10 +916,7 @@ extern void omp_clause_range_check_failed (const_tree, const char *, int, of this type is aligned at least to the alignment of the type, even if it doesn't appear that it is. We see this, for example, in object-oriented languages where a tag field may show this is an object of a more-aligned - variant of the more generic type. - - In an SSA_NAME node, nonzero if the SSA_NAME node is on the SSA_NAME - freelist. */ + variant of the more generic type. */ #define TYPE_ALIGN_OK(NODE) (TYPE_CHECK (NODE)->base.nothrow_flag) /* Used in classes in C++. */ @@ -1865,8 +1862,15 @@ extern machine_mode element_mode (const_tree t); #define TYPE_ATTRIBUTES(NODE) (TYPE_CHECK (NODE)->type_common.attributes) /* The alignment necessary for objects of this type. - The value is an int, measured in bits. */ -#define TYPE_ALIGN(NODE) (TYPE_CHECK (NODE)->type_common.align) + The value is an int, measured in bits and must be a power of two. + We support also an "alignement" of zero. */ +#define TYPE_ALIGN(NODE) \ + (TYPE_CHECK (NODE)->type_common.align \ + ? ((unsigned)1) << ((NODE)->type_common.align - 1) : 0) + +/* Specify that TYPE_ALIGN(NODE) is X. */ +#define SET_TYPE_ALIGN(NODE, X) \ + (TYPE_CHECK (NODE)->type_common.align = ffs_hwi (X)) /* 1 if the alignment for this type was requested by "aligned" attribute, 0 if it is the default for this type. */ @@ -2306,8 +2310,16 @@ extern machine_mode element_mode (const_tree t); #define DECL_SIZE(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.size) /* Likewise for the size in bytes. */ #define DECL_SIZE_UNIT(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.size_unit) -/* Holds the alignment required for the datum, in bits. */ -#define DECL_ALIGN(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.align) +/* Returns the alignment required for the datum, in bits. It must + be a power of two, but an "alignment" of zero is supported + (e.g. as "uninitialized" sentinel). */ +#define DECL_ALIGN(NODE) \ + (DECL_COMMON_CHECK (NODE)->decl_common.align \ + ? ((unsigned)1) << ((NODE)->decl_common.align - 1) : 0) +/* Specify that DECL_ALIGN(NODE) is X. */ +#define SET_DECL_ALIGN(NODE, X) \ + (DECL_COMMON_CHECK (NODE)->decl_common.align = ffs_hwi (X)) + /* The alignment of NODE, in bytes. */ #define DECL_ALIGN_UNIT(NODE) (DECL_ALIGN (NODE) / BITS_PER_UNIT) /* Set if the alignment of this DECL has been set by the user, for @@ -2510,7 +2522,7 @@ extern void decl_value_expr_insert (tree, tree); #define DECL_OFFSET_ALIGN(NODE) \ (((unsigned HOST_WIDE_INT)1) << FIELD_DECL_CHECK (NODE)->decl_common.off_align) -/* Specify that DECL_ALIGN(NODE) is a multiple of X. */ +/* Specify that DECL_OFFSET_ALIGN(NODE) is X. */ #define SET_DECL_OFFSET_ALIGN(NODE, X) \ (FIELD_DECL_CHECK (NODE)->decl_common.off_align = ffs_hwi (X) - 1) |