[llvm-bugs] [Bug 26585] DBG_VALUE is accidentally promoted to location for the entire function

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26585

Adrian Prantl <aprantl at apple.com> changed:

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

--- Comment #1 from Adrian Prantl <aprantl at apple.com> ---
Fixed in r262247:

Author: Adrian Prantl <aprantl at apple.com>
Date:   Mon Feb 29 11:53:22 2016 -0800

    Fix PR26585 by improving the promotion of DBG_VALUEs to DW_AT_locations.
    When a variable is described by a single DBG_VALUE instruction we can
    often use a more efficient inline DW_AT_location instead of using a
    location list.

    This commit makes the heuristic that decides when to apply this
    optimization stricter by also verifying that the DBG_VALUE is live at the
    entry of the function (instead of just checking that it is valid until
    the end of the function).

    <rdar://problem/24611008>

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