[Bug rtl-optimization/43721] Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call

[astrange at ithinksw dot com]

------- Comment #1 from astrange at ithinksw dot com  2010-04-12 03:54 -------
Still the case with 4.5.

> arm-none-linux-gnueabi-gcc -Os -S divmod.c
> cat divmod.s
        .cpu arm10tdmi
        .fpu softvfp
        .eabi_attribute 20, 1
        .eabi_attribute 21, 1
        .eabi_attribute 23, 3
        .eabi_attribute 24, 1
        .eabi_attribute 25, 1
        .eabi_attribute 26, 2
        .eabi_attribute 30, 4
        .eabi_attribute 18, 4
        .file   "divmod.c"
        .global __aeabi_idivmod
        .global __aeabi_idiv
        .text
        .align  2
        .global divmod
        .type   divmod, %function
divmod:
        @ args = 0, pretend = 0, frame = 0
        @ frame_needed = 0, uses_anonymous_args = 0
        stmfd   sp!, {r4, r5, r6, lr}
        mov     r6, r0
        mov     r5, r1
        bl      __aeabi_idivmod
        mov     r0, r6
        mov     r4, r1
        mov     r1, r5
        bl      __aeabi_idiv
        add     r0, r4, r0
        ldmfd   sp!, {r4, r5, r6, pc}
        .size   divmod, .-divmod
        .ident  "GCC: (GNU) 4.5.0 20100325 (experimental)"
        .section        .note.GNU-stack,"",%progbits


-- 

astrange at ithinksw dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |astrange at ithinksw dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43721