[LLVMbugs] [Bug 9076] New: Spurious warning about uninitialized variable when assigned in condition

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9076

           Summary: Spurious warning about uninitialized variable when
                    assigned in condition
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: tjw at omnigroup.com
                CC: llvmbugs at cs.uiuc.edu


This construct produces a warning in clang ToT (r124408):

    int identifier;
    if ((strcmp(name, "foo") == 0 && (identifier = 1)) ||
        (strcmp(name, "bar") == 0 && (identifier = 2))) {
        return identifier;
    }
    return 0;

But the variable is only used on conditional paths were it has been assigned.
Obviously this is a little bit of a "clever" use of C and we can restructure
our use to avoid it, but it might be nice to handle this.

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