http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54374

             Bug #: 54374
           Summary: analysis for "may be used uninitialized" degraded...
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: regression
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: gbburkha...@gmail.com


Created attachment 28083
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28083
example code

gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
Target: x86_64-linux-gnu

With the 4.6.3 compiler for the attached code, I get:

 gcc -g -c -O2 -Wall e?.c -m32
e0.c: In function "main":
e0.c:277:21: warning: "level" may be used uninitialized in this function
[-Wuninitialized]
e0.c:279:12: warning: "portno" may be used uninitialized in this function
[-Wuninitialized]

but with the 4.5.2 compiler, I get:

gcc -O2 -Wall -c e?.c
e0.c: In function "main":
e0.c:259:9: warning: "portno" may be used uninitialized in this function
e0.c:263:9: warning: "level" may be used uninitialized in this function
e1.c: In function "main":
e1.c:259:9: warning: "portno" may be used uninitialized in this function
e1.c:264:9: warning: "level" may be used uninitialized in this function

gcc --version
gcc (Ubuntu/Linaro 4.5.1-7ubuntu2) 4.5.1
Target: i686-linux-gnu

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