[llvm-bugs] [Bug 38323] New: LLVM C++ demangler doesn't collapse references

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https://bugs.llvm.org/show_bug.cgi?id=38323

            Bug ID: 38323
           Summary: LLVM C++ demangler doesn't collapse references
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: pkmx.tw at gmail.com
                CC: llvm-bugs at lists.llvm.org

The managed name "_Z1fORi" is demangled by binutils as:

$ c++filt _Z1fORi
f(int&)

Here `ORi` translates to a "a rvalue-reference to lvalue-reference to int",
which is collapsed to a lvalue-reference to int under C++'s reference
collapsing rules.

However, LLVM's demangler doesn't collapse them:

$ llvm-cxxfilt _Z1fORi
f(int&&&)

which is an invalid function signature.

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