# REQUIRES: x86

# RUN: rm -rf %t; split-file %s %t && cd %t
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin main.s -o main.o
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin calls-foo.s -o calls-foo.o
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin 1.s -o 1.o
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin 2.s -o 2.o
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin common.s -o common.o

# RUN: llvm-as 1.ll -o 1.bc
# RUN: llvm-as 2.ll -o 2.bc

## Neither 1.o nor 2.o is loaded.
# RUN: %lld main.o --start-lib 1.o 2.o --end-lib -why_load | count 0
# RUN: %lld main.o --start-lib -filelist filelist --end-lib -why_load | count 0
# RUN: llvm-readobj -s a.out | FileCheck %s
# CHECK-NOT: Name: _foo
# CHECK-NOT: Name: _bar

## _bar loads 2.o. The last --end-lib can be omitted.
# RUN: %lld main.o -u _bar --start-lib 1.o 2.o -t -why_load | FileCheck %s --check-prefix=CHECK2WHY
# RUN: %lld main.o -u _bar --start-lib -filelist filelist -t -why_load | FileCheck %s --check-prefix=CHECK2WHY
# RUN: llvm-readobj -s a.out | FileCheck --check-prefix=CHECK2 %s
# CHECK2WHY:      main.o
# CHECK2WHY-NEXT: 2.o
# CHECK2WHY-NEXT: _bar forced load of 2.o
# CHECK2WHY-EMPTY:
# CHECK2-NOT: Name: _foo
# CHECK2: Name: _bar
# CHECK2-NOT: Name: _foo

## _foo loads 1.o. 1.o loads 2.o.
# RUN: %lld main.o -u _foo --start-lib 1.o 2.o -why_load | FileCheck %s --check-prefix=CHECK3WHY
# RUN: llvm-readobj -s a.out | FileCheck --check-prefix=CHECK3 %s
# RUN: %lld main.o -u _foo --start-lib 2.o --end-lib --start-lib 1.o -why_load | FileCheck %s --check-prefix=CHECK3WHY
# RUN: llvm-readobj -s a.out | FileCheck --check-prefix=CHECK3 %s
# CHECK3WHY:      _foo forced load of 1.o
# CHECK3WHY-NEXT: _bar forced load of 2.o
# CHECK3WHY-EMPTY:
# CHECK3-DAG: Name: _foo
# CHECK3-DAG: Name: _bar

## Don't treat undefined _bar in 1.o as a lazy definition.
# RUN: not %lld main.o -u _bar --start-lib 1.o 2>&1 | FileCheck %s --check-prefix=CHECK4
# CHECK4: error: undefined symbol: _bar

# RUN: %lld main.o -u _common --start-lib common.o
# RUN: llvm-readobj -s a.out | FileCheck %s --check-prefix=COMMON1
# COMMON1: Name: _common

# RUN: %lld main.o --start-lib common.o
# RUN: llvm-readobj -s a.out | FileCheck %s --check-prefix=COMMON2
# COMMON2-NOT: Name: _common

## Neither 1.bc nor 2.bc is loaded.
# RUN: %lld main.o --start-lib 1.bc 2.bc -why_load | count 0
# RUN: llvm-readobj -s a.out | FileCheck %s --check-prefix=BITCODE
# BITCODE-NOT: Name: _foo
# BITCODE-NOT: Name: _bar

## _bar loads 2.bc.
# RUN: %lld main.o -u _bar --start-lib 1.bc 2.bc -why_load | FileCheck %s --check-prefix=BITCODE2WHY
# RUN: llvm-readobj -s a.out | FileCheck %s --check-prefix=BITCODE2
# BITCODE2WHY:      _bar forced load of 2.bc
# BITCODE2WHY-EMPTY:
# BITCODE2-NOT: Name: _foo
# BITCODE2: Name: _bar
# BITCODE2-NOT: Name: _foo

## calls-foo.o loads 1.bc. 1.bc loads 2.bc.
# RUN: %lld calls-foo.o --start-lib 1.bc 2.bc -why_load | FileCheck %s --check-prefix=BITCODE3WHY
# RUN: llvm-readobj -s a.out | FileCheck --check-prefix=BITCODE3 %s
# RUN: %lld calls-foo.o --start-lib 2.bc --end-lib --start-lib 1.bc -why_load | FileCheck %s --check-prefix=BITCODE3WHY
# RUN: llvm-readobj -s a.out | FileCheck --check-prefix=BITCODE3 %s
# BITCODE3WHY:      _foo forced load of 1.bc
# BITCODE3WHY-NEXT: _bar forced load of 2.bc
# BITCODE3WHY-EMPTY:
# BITCODE3-DAG: Name: _foo

# RUN: not %lld main.o --start-lib --start-lib 2>&1 | FileCheck -check-prefix=NESTED-LIB %s
# NESTED-LIB: error: nested --start-lib

# RUN: not %lld --end-lib 2>&1 | FileCheck %s --check-prefix=STRAY
# STRAY: error: stray --end-lib

#--- main.s
.globl _main
_main:

#--- calls-foo.s
.globl _main
_main:
  call _foo

#--- 1.s
.globl _foo
_foo:
  call _bar

#--- 2.s
.globl _bar
_bar:
  ret

#--- common.s
.comm _common, 1

#--- 1.ll
target triple = "x86_64-apple-macosx10.15.0"
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

define void @foo() {
  tail call void () @bar()
  ret void
}

declare void @bar()

#--- 2.ll
target triple = "x86_64-apple-macosx10.15.0"
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

define void @bar() {
  ret void
}

#--- filelist
1.o
2.o