llvm-mirror/test/Linker/comdat11.ll
Rafael Espindola e91510452a Bring r254336 back:
The difference is that now we don't error on out-of-comdat access to
internal global values. We copy them instead. This seems to match the
expectation of COFF linkers (see pr25686).

Original message:

    Start deciding earlier what to link.

    A traditional linker is roughly split in symbol resolution and
"copying
    stuff".

    The two tasks are badly mixed in lib/Linker.

    This starts splitting them apart.

    With this patch there are no direct call to linkGlobalValueBody or
    linkGlobalValueProto. Everything is linked via WapValue.

    This also includes a few fixes:
    * A GV goes undefined if the comdat is dropped (comdat11.ll).
    * We error if an internal GV goes undefined (comdat13.ll).
    * We don't link an unused comdat.

    The first two match the behavior of an ELF linker. The second one is
    equivalent to running globaldce on the input.

llvm-svn: 254418
2015-12-01 15:19:48 +00:00

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LLVM

; RUN: llvm-link -S %s %p/Inputs/comdat11.ll -o - | FileCheck %s
$foo = comdat any
@foo = global i8 0, comdat
; CHECK: @foo = global i8 0, comdat
; CHECK: define void @zed() {
; CHECK: call void @bar()
; CHECK: ret void
; CHECK: }
; CHECK: declare void @bar()