http://llvm.org/bugs/show_bug.cgi?id=18363

Zhendong Su <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #2 from Zhendong Su <[email protected]> ---
Bill, I don't think that this has been fixed really. The crash is indeed gone,
but the inconsistent behavior doesn't seem desired --- the code is rejected at
-O0, but accepted at -O1 and above. 

Please see below: 

$ clang-trunk -v
clang version 3.5 (trunk 198876)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.3
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
$ 
$ clang-trunk -O0 -ftrapv -c small.c
error: argument to '__builtin_return_address' must be a constant integer
1 error generated.
$ 
$ clang-trunk -O1 -ftrapv -c small.c
$

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