[llvm-bugs] [Bug 46627] Invalid optimization with math library `fmax` and signed zeros

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Jul 14 07:33:57 PDT 2020


https://bugs.llvm.org/show_bug.cgi?id=46627

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED
 Fixed By Commit(s)|                            |34d35d4a, e6c01642

--- Comment #5 from Sanjay Patel <spatel+llvm at rotateright.com> ---
Both bugs/fixes were in ValueTracking.

This restricts the analysis of maxnum:
https://github.com/llvm/llvm-project/commit/34d35d4a42dc747345cea4a8b7066371a70cf7a8

And this should solve not recognizing the no-builtin attribute:
https://github.com/llvm/llvm-project/commit/e6c016420c796ac038b15e1ba0557947bf11d507

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