On 7/21/05, Liu Haibin <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I have a problem on the define_peephole2. In nois2.md, there's such a
> define_insn
>
> (define_insn "addsi3"
> [(set (match_operand:SI 0 "register_operand" "=r,r")
> (plus:SI (match_operand:SI 1 "register_operand" "%r,r")
> (match_operand:SI 2 "arith_operand" "r,I")))]
> ""
> "add%i2\\t%0, %1, %z2"
> [(set_attr "type" "alu")])
>
> I defined a peephole2 to replace this instruction.
>
> (define_peephole2
> [(set (match_operand:SI 0 "register_operand" "=r")
> (plus:SI (match_operand:SI 1 "register_operand" "%r")
> ; (match_operand:SI 2 "arith_operand" "r")))]
> (match_operand:SI 2 "register_operand" "r")))]
> ""
> [(set (match_operand:SI 0 "register_operand" "=r")
> (unspec_volatile:SI [(match_operand:SI 4 "custom_insn_opcode" "N")
my mistake. should be match_operand:SI 3 here. Now no more error.
> (match_operand:SI 1 "register_operand" "r")
> (match_operand:SI 2 "register_operand" "r")]
> CUSTOM_INII))]
> "
> {
> operands[4] = const0_rtx;
> }")
>
> Because the operand 2 in the replacing instruction must be a register,
> I changed the "arith_operand" to "register_operand", hoping that it
> only replaces something like, add r1, r2, r3 instead of addi r1, r2, 9
>
> I did a test with a file, which contains
>
> (insn/f 106 73 107 0 0x0 (set:SI (reg/f:SI 27 sp)
> (plus:SI (reg/f:SI 27 sp)
> (const_int -16 [0xfffffff0]))) -1 (nil)
> (nil))
>
> and it seems that it did try to replace it with the new instruct. And
> I got the following error:
>
> isqrt.c:65: error: unrecognizable insn:
> (insn 123 73 107 0 0x0 (set (reg/f:SI 27 sp)
> (unspec_volatile:SI [
> (const_int 0 [0x0])
> (reg/f:SI 27 sp)
> (const_int -16 [0xfffffff0])
> ] 117)) -1 (nil)
> (nil))
> isqrt.c:65: internal compiler error: in extract_insn, at recog.c:2175
>
> Any ideas why it still tries to replace it even when it's obviously
> not a register (const_int -16)? Thanks.
>
>
> Regards,
> Timothy
>
