[llvm-bugs] [Bug 50360] New: [X86] Back merge some of the znver3 model features to znver1/znver2 models

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50360

            Bug ID: 50360
           Summary: [X86] Back merge some of the znver3 model features to
                    znver1/znver2 models
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: craig.topper at gmail.com, lebedev.ri at gmail.com,
                    llvm-bugs at lists.llvm.org, llvm-dev at redking.me.uk,
                    pengfei.wang at intel.com, spatel+llvm at rotateright.com
            Blocks: 32325

Now that Roman has been able to get the znver3 model into a decent state we
should investigate copying some of this to the older models.

At the very least we can improve the fpu-pipes of most instructions based off
what we've seen on znver3 samples, and copy them over if the AMD SoGs say that
they are the same for znver1/znver2.


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=32325
[Bug 32325] [META][X86] Improve implementation and use of X86 scheduler models
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