mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
c944447e56
A linker normally has two stages: symbol resolution and "moving stuff". In lib/Linker there is the complication of lazy linking some globals, but it was still far more mixed than it needed to. This splits the linker into a lower level IRMover and the linker proper. The IRMover just takes a list of globals to move and a callback that lets the user control what is lazy linked. The main motivation is that now tools/gold (and soon lld) can use their own symbol resolution to instruct IRMover what to do. llvm-svn: 255254
38 lines
1.4 KiB
LLVM
38 lines
1.4 KiB
LLVM
; RUN: llvm-link %s %S/Inputs/alias.ll -S -o - | FileCheck --check-prefix=C1 %s
|
|
; RUN: llvm-link %S/Inputs/alias.ll %s -S -o - | FileCheck --check-prefix=C2 %s
|
|
|
|
; FIXME:
|
|
; The C1 direction is incorrect.
|
|
; When moving an alias to an existing module and we want to discard the aliasee
|
|
; (the C2 case), the IRMover knows to copy the aliasee as internal.
|
|
; When moving a replacement to an aliasee to a module that has an alias (C1),
|
|
; a replace all uses with blindly changes the alias.
|
|
; The C1 case doesn't happen when using a system linker with a plugin because
|
|
; the linker does full symbol resolution first.
|
|
; Given that this is a problem only with llvm-link and its 1 module at a time
|
|
; linking, it should probably learn to changes the aliases in the destination
|
|
; before using the IRMover.
|
|
|
|
@foo = weak global i32 0
|
|
; C1-DAG: @foo = alias i32, i32* @zed
|
|
; C2-DAG: @foo = alias i32, i32* @zed
|
|
|
|
@bar = alias i32, i32* @foo
|
|
; C1-DAG: @bar = alias i32, i32* @foo
|
|
|
|
; C2-DAG: @foo.1 = internal global i32 0
|
|
; C2-DAG: @bar = alias i32, i32* @foo.1
|
|
|
|
@foo2 = weak global i32 0
|
|
; C1-DAG: @foo2 = alias i16, bitcast (i32* @zed to i16*)
|
|
; C2-DAG: @foo2 = alias i16, bitcast (i32* @zed to i16*)
|
|
|
|
@bar2 = alias i32, i32* @foo2
|
|
; C1-DAG: @bar2 = alias i32, bitcast (i16* @foo2 to i32*)
|
|
|
|
; C2-DAG: @foo2.2 = internal global i32 0
|
|
; C2-DAG: @bar2 = alias i32, i32* @foo2.2
|
|
|
|
; C1-DAG: @zed = global i32 42
|
|
; C2-DAG: @zed = global i32 42
|