[llvm-bugs] [Bug 31754] replacing variable by a constant breaks add-with-carry (adc) and subtract-with-borrow (sbb) optimization

via llvm-bugs llvm-bugs at lists.llvm.org
Sun Feb 24 07:41:46 PST 2019


https://bugs.llvm.org/show_bug.cgi?id=31754

Sanjay Patel <spatel+llvm at rotateright.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
           See Also|                            |https://bugs.llvm.org/show_
                   |                            |bug.cgi?id=40825
 Fixed By Commit(s)|352210                      |352210, 354746
             Status|CONFIRMED                   |RESOLVED

--- Comment #11 from Sanjay Patel <spatel+llvm at rotateright.com> ---
(In reply to Simon Pilgrim from comment #10)
> https://godbolt.org/z/vMyJNI
> 
> Of Vincent's original sub/add cases only the add1 looks like its still
> having problems.

That's the last problem that I was tracking for this report too.
Should be fixed after:
https://reviews.llvm.org/rL354746

Feel free to reopen and/or file new bugs (like bug 40825) for missing pieces.

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