src/llvm-project/lld/test/MachO/lto-internalize-unnamed-addr.ll

; REQUIRES: x86
; RUN: rm -rf %t; split-file %s %t
;; This test covers both FullLTO and ThinLTO code paths because we have observed
;; (unexpected) differences between the two.
; RUN: llvm-as %t/test.ll -o %t/test.o
; RUN: llvm-as %t/test2.ll -o %t/test2.o
; RUN: opt -module-summary %t/test.ll -o %t/test.thinlto.o
; RUN: opt -module-summary %t/test2.ll -o %t/test2.thinlto.o

; RUN: %lld -lSystem %t/test.o %t/test2.o -o %t/test -save-temps
; RUN: llvm-dis < %t/test.0.2.internalize.bc | FileCheck %s --check-prefix=LTO-BC
; RUN: llvm-nm -m %t/test | FileCheck %s --check-prefix=LTO

; RUN: %lld -lSystem -dylib %t/test.o %t/test2.o -o %t/test.dylib -save-temps
; RUN: llvm-dis < %t/test.dylib.0.2.internalize.bc | FileCheck %s --check-prefix=LTO-BC-DYLIB
; RUN: llvm-nm -m %t/test.dylib | FileCheck %s --check-prefix=LTO-DYLIB

; RUN: %lld -lSystem %t/test.thinlto.o %t/test2.thinlto.o -o %t/test.thinlto \
; RUN:   -save-temps
; RUN: llvm-dis < %t/test.thinlto.o.2.internalize.bc | FileCheck %s --check-prefix=THINLTO-BC
; RUN: llvm-dis < %t/test2.thinlto.o.2.internalize.bc | FileCheck %s --check-prefix=THINLTO-BC-2
; RUN: llvm-nm -m %t/test.thinlto | FileCheck %s --check-prefix=THINLTO

; RUN: %lld -lSystem -dylib %t/test.thinlto.o %t/test2.thinlto.o -o \
; RUN:   %t/test.thinlto.dylib -save-temps
; RUN: llvm-dis < %t/test.thinlto.o.2.internalize.bc | FileCheck %s --check-prefix=THINLTO-BC-DYLIB
; RUN: llvm-dis < %t/test2.thinlto.o.2.internalize.bc | FileCheck %s --check-prefix=THINLTO-BC-2
; RUN: llvm-nm -m %t/test.thinlto.dylib | FileCheck %s --check-prefix=THINLTO-DYLIB

; LTO-BC-DAG: @global_unnamed = internal unnamed_addr global i8 42
; LTO-BC-DAG: @global_unnamed_sometimes_linkonce = internal unnamed_addr global i8 42
; LTO-BC-DAG: @local_unnamed_const = internal constant i8 42
; LTO-BC-DAG: @local_unnamed = internal global i8 42
; LTO-BC-DAG: @local_unnamed_always_const = internal constant i8 42
; LTO-BC-DAG: @local_unnamed_sometimes_const = internal constant i8 42

; LTO-BC-DYLIB-DAG: @global_unnamed = internal unnamed_addr global i8 42
; LTO-BC-DYLIB-DAG: @local_unnamed_const = internal constant i8 42
; LTO-BC-DYLIB-DAG: @local_unnamed = weak_odr global i8 42
; LTO-BC-DYLIB-DAG: @global_unnamed_sometimes_linkonce = weak_odr unnamed_addr global i8 42
; LTO-BC-DYLIB-DAG: @local_unnamed_always_const = internal constant i8 42
; LTO-BC-DYLIB-DAG: @local_unnamed_sometimes_const = weak_odr constant i8 42

; THINLTO-BC-DAG: @global_unnamed = internal unnamed_addr global i8 42
; THINLTO-BC-DAG: @global_unnamed_sometimes_linkonce = weak_odr unnamed_addr global i8 42
; THINLTO-BC-DAG: @local_unnamed_const = internal local_unnamed_addr constant i8 42
; THINLTO-BC-DAG: @local_unnamed_always_const = weak_odr hidden local_unnamed_addr constant i8 42
; THINLTO-BC-DAG: @local_unnamed_sometimes_const = weak_odr local_unnamed_addr constant i8 42
; THINLTO-BC-DAG: @local_unnamed = internal local_unnamed_addr global i8 42

; THINLTO-BC-DYLIB-DAG: @global_unnamed = internal unnamed_addr global i8 42
; THINLTO-BC-DYLIB-DAG: @global_unnamed_sometimes_linkonce = weak_odr unnamed_addr global i8 42
; THINLTO-BC-DYLIB-DAG: @local_unnamed_const = internal local_unnamed_addr constant i8 42
; THINLTO-BC-DYLIB-DAG: @local_unnamed_always_const = weak_odr hidden local_unnamed_addr constant i8 42
; THINLTO-BC-DYLIB-DAG: @local_unnamed_sometimes_const = weak_odr local_unnamed_addr constant i8 42
; THINLTO-BC-DYLIB-DAG: @local_unnamed = weak_odr local_unnamed_addr global i8 42

; THINLTO-BC-2-DAG: @global_unnamed_sometimes_linkonce = available_externally unnamed_addr global i8 42
; THINLTO-BC-2-DAG: @local_unnamed_always_const = available_externally local_unnamed_addr constant i8 42
; THINLTO-BC-2-DAG: @local_unnamed_sometimes_const = available_externally local_unnamed_addr global i8 42

; LTO-DAG: (__DATA,__data) non-external _global_unnamed
; LTO-DAG: (__DATA,__data) non-external _global_unnamed_sometimes_linkonce
; LTO-DAG: (__DATA,__data) non-external _local_unnamed
;; LD64 marks this with (was a private external). IMO both LD64 and LLD should
;; mark all the other internalized symbols with (was a private external).
; LTO-DAG: (__TEXT,__const) non-external _local_unnamed_always_const
; LTO-DAG: (__TEXT,__const) non-external _local_unnamed_const
;; LD64 doesn't internalize this -- it emits it as a weak external -- which I
;; think is a missed optimization on its end.
; LTO-DAG: (__TEXT,__const) non-external _local_unnamed_sometimes_const

;; The output here is largely identical to LD64's, except that the non-external
;; symbols here are all marked as (was a private external) by LD64. LLD should
;; follow suit.
; LTO-DYLIB-DAG: (__DATA,__data) non-external _global_unnamed
; LTO-DYLIB-DAG: (__DATA,__data) weak external _global_unnamed_sometimes_linkonce
; LTO-DYLIB-DAG: (__DATA,__data) weak external _local_unnamed
; LTO-DYLIB-DAG: (__TEXT,__const) non-external _local_unnamed_always_const
; LTO-DYLIB-DAG: (__TEXT,__const) non-external _local_unnamed_const
; LTO-DYLIB-DAG: (__TEXT,__const) weak external _local_unnamed_sometimes_const

; THINLTO-DAG: (__DATA,__data) non-external _global_unnamed
;; FIXME: This next symbol should probably be internalized, just like it is
;; under fullLTO.
; THINLTO-DAG: (__DATA,__data) weak external _global_unnamed_sometimes_linkonce
; THINLTO-DAG: (__DATA,__data) non-external _local_unnamed
; THINLTO-DAG: (__TEXT,__const) non-external (was a private external) _local_unnamed_always_const
; THINLTO-DAG: (__TEXT,__const) non-external _local_unnamed_const
;; LD64 actually fails to link when the following symbol is included in the test
;; input, instead producing this error:
;; reference to bitcode symbol '_local_unnamed_sometimes_const' which LTO has not compiled in '_used' from /tmp/lto.o for architecture x86_64
; THINLTO-DAG: (__TEXT,__const) weak external _local_unnamed_sometimes_const

; THINLTO-DYLIB-DAG: (__DATA,__data) non-external _global_unnamed
; THINLTO-DYLIB-DAG: (__DATA,__data) weak external _global_unnamed_sometimes_linkonce
; THINLTO-DYLIB-DAG: (__DATA,__data) weak external _local_unnamed
; THINLTO-DYLIB-DAG: (__TEXT,__const) non-external (was a private external) _local_unnamed_always_const
; THINLTO-DYLIB-DAG: (__TEXT,__const) non-external _local_unnamed_const
; THINLTO-DYLIB-DAG: (__TEXT,__const) weak external _local_unnamed_sometimes_const

;--- test.ll
target triple = "x86_64-apple-darwin"
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

@global_unnamed = linkonce_odr unnamed_addr global i8 42
@global_unnamed_sometimes_linkonce = linkonce_odr unnamed_addr global i8 42
@local_unnamed_const = linkonce_odr local_unnamed_addr constant i8 42
@local_unnamed_always_const = linkonce_odr local_unnamed_addr constant i8 42
@local_unnamed_sometimes_const = linkonce_odr local_unnamed_addr constant i8 42
@local_unnamed = linkonce_odr local_unnamed_addr global i8 42
@used = hidden constant [6 x ptr] [ptr @global_unnamed,
  ptr @global_unnamed_sometimes_linkonce, ptr @local_unnamed,
  ptr @local_unnamed_const, ptr @local_unnamed_always_const,
  ptr @local_unnamed_sometimes_const]
@llvm.used = appending global [1 x ptr] [ptr @used]

define void @main() {
  ret void
}

;--- test2.ll
target triple = "x86_64-apple-darwin"
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

@global_unnamed_sometimes_linkonce = weak_odr unnamed_addr global i8 42
@local_unnamed_always_const = linkonce_odr local_unnamed_addr constant i8 42
@local_unnamed_sometimes_const = linkonce_odr local_unnamed_addr global i8 42