[llvm-bugs] [Bug 40826] New: Lost metadata information during optimization

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40826

            Bug ID: 40826
           Summary: Lost metadata information during optimization
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: jan.vesely at rutgers.edu
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Created attachment 21507
  --> https://bugs.llvm.org/attachment.cgi?id=21507&action=edit
link-proj2.ll

I've run into a situation when some operations don't have debug location
information.
I'm not sure if it's a bug or intended behaviour.
The example is attached. proj-link2.ll is the original unoptimized snippet,
proj-opt2.ll is the result after running opt -O3.

thanks,
Jan

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