peephole patterns are not matching

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peephole patterns are not matching
\ Mohamed Shafi (12 Apr 2007)
. \ Andreas Schwab (12 Apr 2007)
. . \ Mohamed Shafi (12 Apr 2007)
. \ Jim Wilson (12 Apr 2007)

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Subject:	peephole patterns are not matching
Group:	Gcc
From:	Mohamed Shafi
Date:	12 Apr 2007

hello everyone,

I have the following 2 patterns which are consecutive. (from shorten
rtl dump file)

(insn 69 34 70 (set (reg:SQ 0 d0)
(reg:SQ 18 f2)) 79 {movsq} (nil)
(nil))

(insn 70 69 35 (set (reg:SQ 16 f0 [orig:38 D.3693 ] [38])
(reg:SQ 0 d0)) 79 {movsq} (nil)
(nil))

For the above pattern i wrote a peephole like this

(define_peephole
[(set (match_operand:SF 0 "data_reg" "=d")
(match_operand:SF 1 "float_reg" "f"))
(set (match_operand:SF 2 "float_reg" "=f")
(match_operand:SF 3 "data_reg" "d"))]
"REGNO(operands[0]) == REGNO(operands[3])"
"movf\\t%1, %3"
)

even i wrote define_peephole2 which is similar to the above.
But the above patterns are not matched at all. But i can find these
patterns in the rtl dumps.

What could be the reason for this behavior?

Regards,
Shafi