On Sun, Jan 16, 2011 at 3:38 PM, H.J. Lu <hjl.to...@gmail.com> wrote:
> On Sun, Jan 16, 2011 at 3:31 PM, H.J. Lu <hjl.to...@gmail.com> wrote:
>> Hi,
>>
>> While working on x32 port, I noticed that match_asm_constraints_1 turns
>>
>> (insn 41 58 46 2 y.i:573 (set (reg/f:SI 98)
>> (symbol_ref/f:SI ("*.LC1") [flags 0x2] <string_cst
>> 0x7f3dc64880f0>)) 48 {*movsi_1_load_x32} (nil))
>> ...
>> (insn 42 40 43 7 y.i:573 (set (mem/s/f:SI (plus:DI (reg/f:DI 20 frame)
>> (const_int -32 [0xffffffffffffffe0])) [3
>> <variable>.iov_base+0 S4 A128])
>> (reg/f:SI 98)) 49 {*movsi_1_store_x32} (expr_list:REG_EQUAL
>> (symbol_ref/f:SI ("*.LC1") [flags 0x2] <string_cst 0x7f3dc64880f0>)
>> (nil)))
>>
>> into
>>
>> (insn 42 40 43 7 y.i:573 (set (mem/s/f:SI (plus:DI (reg/f:DI 20 frame)
>> (const_int -32 [0xffffffffffffffe0])) [3
>> <variable>.iov_base+0 S4 A128])
>> (reg/f:SI 98)) 49 {*movsi_1_store_x32} (expr_list:REG_EQUAL
>> (symbol_ref/f:SI ("*.LC1") [flags 0x2] <string_cst 0x7f3dc64880f0>)
>> (nil)))
>>
>> I have disabled such pattern for x32. Is there a way to tell
>> match_asm_constraints_1 not to
>> generate invalid pattern?
>>
>
> Never mind. It is something else.
It is IRA. Before IRA, I have
(insn 41 58 46 2 y.i:573 (set (reg/f:SI 98)
(symbol_ref/f:SI ("*.LC1") [flags 0x2] <string_cst
0x7fe65da510f0>)) 47 {*movsi_1} (nil))
...
(insn 42 40 43 7 y.i:573 (set (mem/s/f:SI (plus:DI (reg/f:DI 20 frame)
(const_int -32 [0xffffffffffffffe0])) [3
<variable>.iov_base+0 S4 A128])
(reg/f:SI 98)) 47 {*movsi_1} (expr_list:REG_EQUAL
(symbol_ref/f:SI ("*.LC1") [flags 0x2] <string_cst 0x7fe65da510f0>)
(nil)))
IRA turns this into
(insn 42 40 43 7 y.i:573 (set (mem/s/f:SI (plus:DI (reg/f:DI 7 sp)
(const_int 4128 [0x1020])) [3 <variable>.iov_base+0 S4 A128])
(symbol_ref/f:SI ("*.LC1") [flags 0x2] <string_cst
0x7fe65da510f0>)) 47 {*movsi_1} (expr_list:REG_EQUAL (symbol_ref/f:SI
("*.LC1") [flags 0x2] <string_cst 0x7fe65da510f0>)
(nil)))
even if I have
(define_insn "*movsi_1"
[(set (match_operand:SI 0 "nonimmediate_operand"
"=r,m ,*y,*y,?rm,?*y,*x,*x,?r ,m ,?*Yi,*x")
(match_operand:SI 1 "general_operand"
"g ,ri,C ,*y,*y ,rm ,C ,*x,*Yi,*x,r ,m "))]
"!(MEM_P (operands[0]) && MEM_P (operands[1]))
&& !(TARGET_X32
&& flag_pic
&& MEM_P (operands[0])
&& (GET_CODE (operands[1]) == SYMBOL_REF
|| GET_CODE (operands[1]) == LABEL_REF))"
--
H.J.
