diff options
Diffstat (limited to 'gcc/expr.h')
| -rw-r--r-- | gcc/expr.h | 23 |
1 files changed, 21 insertions, 2 deletions
@@ -107,7 +107,15 @@ enum block_op_methods BLOCK_OP_NO_LIBCALL_RET }; -typedef rtx (*by_pieces_constfn) (void *, HOST_WIDE_INT, scalar_int_mode); +typedef rtx (*by_pieces_constfn) (void *, void *, HOST_WIDE_INT, + fixed_size_mode); + +/* The second pointer passed to by_pieces_constfn. */ +struct by_pieces_prev +{ + rtx data; + fixed_size_mode mode; +}; extern rtx emit_block_move (rtx, rtx, rtx, enum block_op_methods); extern rtx emit_block_move_hints (rtx, rtx, rtx, enum block_op_methods, @@ -193,7 +201,8 @@ extern rtx clear_storage_hints (rtx, rtx, enum block_op_methods, unsigned int, HOST_WIDE_INT, unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, - unsigned HOST_WIDE_INT); + unsigned HOST_WIDE_INT, + unsigned); /* The same, but always output an library call. */ extern rtx set_storage_via_libcall (rtx, rtx, rtx, bool = false); @@ -224,6 +233,16 @@ extern int can_store_by_pieces (unsigned HOST_WIDE_INT, extern rtx store_by_pieces (rtx, unsigned HOST_WIDE_INT, by_pieces_constfn, void *, unsigned int, bool, memop_ret); +/* If can_store_by_pieces passes for worst-case values near MAX_LEN, call + store_by_pieces within conditionals so as to handle variable LEN efficiently, + storing VAL, if non-NULL_RTX, or valc instead. */ +extern bool try_store_by_multiple_pieces (rtx to, rtx len, + unsigned int ctz_len, + unsigned HOST_WIDE_INT min_len, + unsigned HOST_WIDE_INT max_len, + rtx val, char valc, + unsigned int align); + /* Emit insns to set X from Y. */ extern rtx_insn *emit_move_insn (rtx, rtx); extern rtx_insn *gen_move_insn (rtx, rtx); |