[llvm-bugs] [Bug 48054] New: Bug destroying data in utils/TableGen/CodeGenDAGPatterns.cpp

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48054

            Bug ID: 48054
           Summary: Bug destroying data in
                    utils/TableGen/CodeGenDAGPatterns.cpp
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows XP
            Status: NEW
          Severity: normal
          Priority: P
         Component: Support Libraries
          Assignee: unassignedbugs at nondot.org
          Reporter: paul at windfall.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 24121
  --> https://bugs.llvm.org/attachment.cgi?id=24121&action=edit
Screen capture.

I apologize for submitting this report without trying to find the problem
myself. I'm only recently reacquainted with C++ and don't have enough knowledge
of the internals.

This looks like a problem in berase_if() in DAGISelEmitter.cpp. I have attached
the first half of the stack trace.

I am running Visual Studio 2019 on Windows 7.

This problem occurs when building the PowerPC and X86 targets. It does not
occur when building AMDGPU, ARM, NVPTX, or SystemZ.

The problem has been around for about a week. I ran this build under master,
which I rebased earlier today.

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