[Bug middle-end/56574] False possibly uninitialized variable warning

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56574



--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-03-08 
21:25:47 UTC ---

(In reply to comment #3)

> Looking at the code that GCC generated (4.7.2 from Fedora and similarly with

> pristine 4.8 trunk@196249):







For -O2, the generated code looks though:

    testl    %edi, %edi

    sete    %dl

    testl    %eax, %eax

    setne    %al

    andl    %edx, %eax



Here eax might be uninitialized but that is ok because dl will always be 0 when

it is.