[llvm-bugs] [Bug 48802] New: Pass modifies its input and doesn't report it: Global Value Numbering

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48802

            Bug ID: 48802
           Summary: Pass modifies its input and doesn't report it: Global
                    Value Numbering
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: david.stenberg at ericsson.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Created attachment 24398
  --> https://bugs.llvm.org/attachment.cgi?id=24398&action=edit
IR reproducer.

Requires an expensive checks build to reproduce.

LLVM commit: 4fd77668b2cc215f0605fe20bb989b90b29f4346

$ ./build-expensive/bin/opt -S -gvn gvn.ll
Pass modifies its input and doesn't report it: Global Value Numbering
Pass modifies its input and doesn't report it
UNREACHABLE executed at
/home/david/monorepo/llvm/lib/IR/LegacyPassManager.cpp:1445!

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