diff options
Diffstat (limited to 'gcc/expr.h')
| -rw-r--r-- | gcc/expr.h | 29 |
1 files changed, 3 insertions, 26 deletions
@@ -153,33 +153,10 @@ enum direction {none, upward, downward}; /* Value has this type. */ #define PRETEND_OUTGOING_VARARGS_NAMED 0 #endif -/* Nonzero if we do not know how to pass TYPE solely in registers. - We cannot do so in the following cases: - - - if the type has variable size - - if the type is marked as addressable (it is required to be constructed - into the stack) - - if the padding and mode of the type is such that a copy into a register - would put it into the wrong part of the register. - - Which padding can't be supported depends on the byte endianness. - - A value in a register is implicitly padded at the most significant end. - On a big-endian machine, that is the lower end in memory. - So a value padded in memory at the upper end can't go in a register. - For a little-endian machine, the reverse is true. */ - +/* Nonzero if we do not know how to pass TYPE solely in registers. */ #ifndef MUST_PASS_IN_STACK -#define MUST_PASS_IN_STACK(MODE,TYPE) \ - ((TYPE) != 0 \ - && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \ - || TREE_ADDRESSABLE (TYPE) \ - || ((MODE) == BLKmode \ - && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ - && 0 == (int_size_in_bytes (TYPE) \ - % (PARM_BOUNDARY / BITS_PER_UNIT))) \ - && (FUNCTION_ARG_PADDING (MODE, TYPE) \ - == (BYTES_BIG_ENDIAN ? upward : downward))))) +extern bool default_must_pass_in_stack PARAMS((enum machine_mode, tree)); +#define MUST_PASS_IN_STACK(MODE,TYPE) default_must_pass_in_stack(MODE, TYPE) #endif /* Nonzero if type TYPE should be returned in memory. |