http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52160

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-02-07 
21:44:42 UTC ---
Here is what GCC produces:
    .loc 1 7 0
    leaq    -4(%rbp), %rax
    movq    %rax, %rsi
    movl    $.LC1, %edi
    movl    $0, %eax
    call    __isoc99_scanf
    jmp    .L2
.L5:
    .loc 1 8 0
    nop
.L2:
    .loc 1 8 0 is_stmt 0 discriminator 1
    movl    -4(%rbp), %eax
    testl    %eax, %eax
    jne    .L5

This looks fine to me.
Which might mean this is an interesting issue with debugging info.

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