[Bug middle-end/31241] Post Increment opportunity missed

[ramana at gcc dot gnu dot org]

------- Comment #5 from ramana at gcc dot gnu dot org  2009-05-30 09:18 -------
This is improved by http://gcc.gnu.org/ml/gcc-patches/2009-05/msg01622.html.
With the patch we get the following code generated. 

        .cpu cortex-a8
        .eabi_attribute 27, 3
        .fpu neon
        .eabi_attribute 20, 1
        .eabi_attribute 21, 1
        .eabi_attribute 23, 3
        .eabi_attribute 24, 1
        .eabi_attribute 25, 1
        .eabi_attribute 26, 1
        .eabi_attribute 30, 2
        .eabi_attribute 18, 4
        .file   "31241.c"
        .text
        .align  2
        .global foo
        .type   foo, %function
foo:
        @ args = 0, pretend = 0, frame = 0
        @ frame_needed = 0, uses_anonymous_args = 0
        @ link register save eliminated.
        add     r2, r0, #40
.L2:
        ldr     r3, [r0, #0]
        orr     r3, r1, r3
        str     r3, [r0], #4
        cmp     r0, r2
        bne     .L2
        bx      lr
        .size   foo, .-foo
        .ident  "GCC: (GNU) 4.5.0 20090527 (experimental)"


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31241