[LLVMbugs] [Bug 18878] New: No uninitialized warning for self-initialization (e.g., int x = x)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18878

            Bug ID: 18878
           Summary: No uninitialized warning for self-initialization
                    (e.g., int x = x)
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chengniansun at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Clang does not warn the self initialization: int x = x;


$: cat s.c
void f(void) {
  int x = x;
  int array[] = {1, 2};
  int y = array[y];
}
$: clang-trunk -Wuninitialized -Winit-self -c s.c
s.c:4:17: warning: variable 'y' is uninitialized when used within its own
initialization [-Wuninitialized]
  int y = array[y];
      ~         ^
1 warning generated.
$: clang-trunk --version
clang version 3.5 (trunk 201498)
Target: x86_64-unknown-linux-gnu
Thread model: posix
$: gcc-trunk -Winit-self -Wuninitialized -c s.c
s.c: In function ‘f’:
s.c:2:7: warning: ‘x’ is used uninitialized in this function [-Wuninitialized]
   int x = x;
       ^
s.c:4:7: warning: ‘y’ is used uninitialized in this function [-Wuninitialized]
   int y = array[y];
       ^

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