[llvm-bugs] [Bug 49691] New: The order of the function differs with or w/o -g

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49691

            Bug ID: 49691
           Summary: The order of the function differs with or w/o -g
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chenzhiwei03 at kuaishou.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

Created attachment 24685
  --> https://bugs.llvm.org/attachment.cgi?id=24685&action=edit
re.cpp

How to produce:

$ clang++ -S -emit-llvm re.cpp -o dbg.ll -g
$ clang++ -S -emit-llvm re.cpp -o rel.ll

Then diff the content of dbgl.ll and rel.ll

Found that the ctor of Re3 (_ZN6extend3re33Re3C2Ev) precedes before the another
funciton in rel.ll file, but the order changes in dbg.ll

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