Hi,
While optimizing some queue-related code I found a few peephole
optimizations that I think are missing (in sdcc 3.9). I do not
have much experience with sdcc's optimizer so it might be that
it is not included for a good reason. Here's my def file:
replace {
mov a,%1
inc a
mov %1,a
} by {
; Peephole ??? replaced inc with direct
inc %1
}
replace {
mov a,%1
dec a
mov %1,a
} by {
; Peephole ??? replaced dec with direct
dec %1
}
replace {
cjne %1,%2,%3
clr c
} by {
cjne %1,%2,%3
; Peephole ??? removed redundant clr c
}
Let me know if this is useful (or broken).
--
whitequark
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