[llvm-bugs] [Bug 45923] Wrong variable value shown during debugging at Og

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45923

Vedant Kumar <vsk at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Fixed By Commit(s)|                            |623b2542446a1873fb7ea3904c4
                   |                            |fb50e2e77fe41
             Status|CONFIRMED                   |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from Vedant Kumar <vsk at apple.com> ---
With 623b2542446a1873fb7ea3904c4fb50e2e77fe41, in the output from `llc a.ll
-stop-after=finalize-isel -o -`, I see:

```
    MOV32mi $rip, 1, $noreg, @e, $noreg, 8, debug-location !32 :: (store 4 into
@e, !tbaa !33)
    DBG_VALUE 1, $noreg, !31, !DIExpression(), debug-location !37 
```

What I think happened is that SelectionDAG placed the (signed) Value from the
salvaged into a constant SDDbgValue node. Later when it reconstructed the
DBG_VALUE MI for this node, I'd expect it to appear as "DBG_VALUE -1".

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