[llvm-bugs] [Bug 35913] New: Revert r315899 in the 6.0 branch

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35913

            Bug ID: 35913
           Summary: Revert r315899 in the 6.0 branch
           Product: new-bugs
           Version: 6.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: dimitry at andric.com
                CC: llvm-bugs at lists.llvm.org

As describe in bug 35741, bug 35749, and bug 35831,
https://reviews.llvm.org/rL315899 has caused serious regressions in assembly
parsing of x86 lock and rep prefixes.

Though bug 35741 has been fixed, there has been no movement nor reviews on the
others, so I would like to request this revision to be reverted in the 6.0
branch.  Post 6.0, the regressions can then be fixed.

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