[llvm-bugs] [Bug 19972] Bad code generation in post-ra ARMLoadStoreOptimizer pass in thumb1 mode

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=19972

Renato Golin <renato.golin at linaro.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
                 CC|                            |renato.golin at linaro.org
         Resolution|---                         |FIXED

--- Comment #7 from Renato Golin <renato.golin at linaro.org> ---
Trunk generates:

    push    {r7, lr}
    add    r7, sp, #0
    ldm    r0!, {r1, r2}
    subs    r0, #8
    bl    bar
    pop    {r7, pc}

which, while inefficient (the sub is unnecessary with no write-back), looks
correct.

If people feel strongly about reducing code size for that sequence in Thumb1,
please open a new enhancement bug.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20160119/7132c5a4/attachment.html>