dupsym

julia> using LLVM

julia> IR = raw"""
       @_ZN5julia4var1E = constant i64 1, align 8

       declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*)
       @__dso_handle = external hidden global i8

       define dso_local i64 @_Z4foo1v() #0 {
       entry:
         %0 = load i64, i64* @_ZN5julia4var1E, align 8
         ret i64 %0
       }
       """
"@_ZN5julia4var1E = constant i64 1, align 8\n\ndeclare i32 @__cxa_atexit(void (i8*)*, i8*, i8*)\n@__dso_handle = external hidden global i8\n\ndefine dso_local i64 @_Z4foo1v() #0 {\nentry:\n  %0 = load i64, i64* @_ZN5julia4var1E, align 8\n  ret i64 %0\n}\n"

julia> @eval f() = Base.llvmcall(($IR, "_Z4foo1v"), Int64, Tuple{})
f (generic function with 1 method)

julia> f()
1

julia> IR2 = raw"""
       @_ZN5julia4var1E = constant i64 1, align 8

       declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*)
       @__dso_handle = external hidden global i8

       define dso_local i64 @_Z4bar1v() #0 {
       entry:
         %0 = load i64, i64* @_ZN5julia4var1E, align 8
         ret i64 %0
       }
       """
"@_ZN5julia4var1E = constant i64 1, align 8\n\ndeclare i32 @__cxa_atexit(void (i8*)*, i8*, i8*)\n@__dso_handle = external hidden global i8\n\ndefine dso_local i64 @_Z4bar1v() #0 {\nentry:\n  %0 = load i64, i64* @_ZN5julia4var1E, align 8\n  ret i64 %0\n}\n"

julia> @eval g() = Base.llvmcall(($IR2, "_Z4bar1v"), Int64, Tuple{})
g (generic function with 1 method)

julia> g()
Failure value returned from cantFail wrapped call
Duplicate definition of symbol '__ZN5julia4var1E'
UNREACHABLE executed at /Users/julia/buildbot/worker/package_macos64/build/usr/include/llvm/Support/Error.h:718!

signal (6): Abort trap: 6