Question about doloop_end pattern

[Joern Rennecke]

I can confirm that the doloop optimization is applied for ARC600 / ARC700
in a compiler based on gcc 4.4.0 20080606 (experimental) .
OTOH, it doesn't use any of the PRE_INC, POST_INC, PRE_MODIFY or
POST_MODIFY addressing modes.

        lp .L__GCC__LP2
        .align 4
.L2:
        add r0,r1,r4
        ld r3,[r0]
        add r0,r6,r4
        add r4,r4,4
        add r2,r5,r3
        st r2,[r0]
        
.L__GCC__LP2: ; loop end