[llvm-bugs] [Bug 40795] clang generates wrong debug information at -O3

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40795

Jeremy Morse <jeremy.morse.llvm at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CONFIRMED                   |RESOLVED
 Fixed By Commit(s)|                            |359426
         Resolution|---                         |FIXED

--- Comment #10 from Jeremy Morse <jeremy.morse.llvm at gmail.com> ---
Fixed in 359426; the variable 'l_34' now reads 'optimized out' in gdb, which is
the most we can hope for in the optimised code: the variable does not have a
machine location when optimize_me_not is called, and thus there's no way to
recover what the variable would have been in the original program.

The likely-dupe program in comment 7 appears to be fixed too -- or at least on
the call to f, l_1412 reads as 947, which IIRC is the correct behaviour.

This was almost certainly misleading developers, many thanks for the report!

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