[llvm-bugs] [Bug 30396] New: IRObjectFile should consolidate symbols with the same name

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30396

            Bug ID: 30396
           Summary: IRObjectFile should consolidate symbols with the same
                    name
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Object
          Assignee: unassignedbugs at nondot.org
          Reporter: rafael.espindola at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Given

target triple = "x86_64-unknown-linux-gnu"
module asm ".global patatino"
module asm ".equ patatino, foo"
declare void @patatino()
define void @foo() {
  call void @patatino()
  ret void
}

llvm-nm reports

                 U patatino
---------------- T foo
---------------- T patatino
                 U foo

It should really just report two symbol
* patatino, which is an asm symbol and has no GV
* foo, with has an associated GV

For the most part this is just funny output, but it does create some
complications with LTO seeing an undefined symbol reported as prevailing.

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