[llvm-bugs] [Bug 33833] New: SelectionDAG crashes on optnone function after r308025

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33833

            Bug ID: 33833
           Summary: SelectionDAG crashes on optnone function after r308025
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: chandlerc at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18814
  --> https://bugs.llvm.org/attachment.cgi?id=18814&action=edit
reduced IR test case

After r308025, SelectionDAG crashes while compiling the file:
https://github.com/xiph/speex/blob/master/libspeex/testenc.c

(Possibly some older version of it, I haven't checked...)

I'm attaching a minimized test case that pretty clearly shows the bug. It seems
specific to O0 (optnone attribute is applied).

Because this is blocking even unoptimized builds I'm going to revert the patch
while it gets investigated.

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