[LLVMbugs] [Bug 13578] MachineCSE doesn't eliminate duplicate GOTPCREL loads

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13578

Benjamin Kramer <benny.kra at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Benjamin Kramer <benny.kra at gmail.com> 2012-08-11 14:06:39 CDT ---
Ah, thanks for the pointer. Fixed in r161728.

Asm output is now:
_foo:                                   ## @foo
    .cfi_startproc
## BB#0:
    pushq    %rbx
Ltmp2:
    .cfi_def_cfa_offset 16
Ltmp3:
    .cfi_offset %rbx, -16
    movq    _glob at GOTPCREL(%rip), %rbx
    movl    $42, (%rbx)
    callq    _x
    testb    $1, %al
    je    LBB0_2
## BB#1:                                ## %a
    movl    (%rbx), %eax
    popq    %rbx
    ret
LBB0_2:                                 ## %b
    xorl    %eax, %eax
    popq    %rbx
    ret

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