Index: test/COFF/thinlto.ll
===================================================================
--- /dev/null
+++ test/COFF/thinlto.ll
@@ -0,0 +1,130 @@
+; RUN: rm -fr %T/thinlto
+; RUN: mkdir %T/thinlto
+; RUN: opt -module-summary -o %T/thinlto/main.thinlto.obj %s
+; RUN: opt -module-summary -o %T/thinlto/foo.thinlto.obj %S/Inputs/lto-dep.ll
+; RUN: llvm-ar cru %T/thinlto/foo.thinlto.lib %T/thinlto/foo.thinlto.obj
+
+; RUN: llc -filetype=obj -o %T/thinlto/main.obj %s
+; RUN: llc -filetype=obj -o %T/thinlto/foo.obj %S/Inputs/lto-dep.ll
+; RUN: llvm-ar cru %T/thinlto/foo.lib %T/thinlto/foo.obj
+
+; RUN: lld-link /out:%T/thinlto/main.exe /entry:main /include:f2 /subsystem:console %T/thinlto/main.thinlto.obj %T/thinlto/foo.thinlto.obj
+; RUN: llvm-readobj -file-headers %T/thinlto/main.exe | FileCheck -check-prefix=HEADERS-11 %s
+; RUN: llvm-objdump -d %T/thinlto/main.exe | FileCheck -check-prefix=TEXT-11 %s
+; RUN: lld-link /out:%T/thinlto/main.exe /entry:main /include:f2 /subsystem:console %T/thinlto/main.thinlto.obj %T/thinlto/foo.thinlto.lib /verbose 2>&1 | FileCheck -check-prefix=VERBOSE %s
+; RUN: llvm-readobj -file-headers %T/thinlto/main.exe | FileCheck -check-prefix=HEADERS-11 %s
+; RUN: llvm-objdump -d %T/thinlto/main.exe | FileCheck -check-prefix=TEXT-11 %s
+
+; RUN: lld-link /out:%T/thinlto/main.exe /entry:main /subsystem:console %T/thinlto/main.obj %T/thinlto/foo.thinlto.obj
+; RUN: llvm-readobj -file-headers %T/thinlto/main.exe | FileCheck -check-prefix=HEADERS-01 %s
+; RUN: llvm-objdump -d %T/thinlto/main.exe | FileCheck -check-prefix=TEXT-01 %s
+; RUN: lld-link /out:%T/thinlto/main.exe /entry:main /subsystem:console %T/thinlto/main.obj %T/thinlto/foo.thinlto.lib
+; RUN: llvm-readobj -file-headers %T/thinlto/main.exe | FileCheck -check-prefix=HEADERS-01 %s
+; RUN: llvm-objdump -d %T/thinlto/main.exe | FileCheck -check-prefix=TEXT-01 %s
+
+; RUN: lld-link /out:%T/thinlto/main.exe /entry:main /subsystem:console %T/thinlto/main.thinlto.obj %T/thinlto/foo.obj
+; RUN: llvm-readobj -file-headers %T/thinlto/main.exe | FileCheck -check-prefix=HEADERS-10 %s
+; RUN: llvm-objdump -d %T/thinlto/main.exe | FileCheck -check-prefix=TEXT-10 %s
+; RUN: lld-link /out:%T/thinlto/main.exe /entry:main /subsystem:console %T/thinlto/main.thinlto.obj %T/thinlto/foo.lib
+; RUN: llvm-readobj -file-headers %T/thinlto/main.exe | FileCheck -check-prefix=HEADERS-10 %s
+; RUN: llvm-objdump -d %T/thinlto/main.exe | FileCheck -check-prefix=TEXT-10 %s
+
+; VERBOSE: foo.thinlto.lib({{.*}}foo.thinlto.obj)
+
+; HEADERS-11: AddressOfEntryPoint: 0x1000
+; TEXT-11: Disassembly of section .text:
+; TEXT-11-NEXT: .text:
+; TEXT-11-NEXT: xorl	%eax, %eax
+; TEXT-11-NEXT: retq
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: int3
+; TEXT-11-NEXT: movl	$2, %eax
+; TEXT-11-NEXT: retq
+
+; HEADERS-01: AddressOfEntryPoint: 0x2000
+; TEXT-01: Disassembly of section .text:
+; TEXT-01-NEXT: .text:
+; TEXT-01-NEXT: subq	$40, %rsp
+; TEXT-01-NEXT: callq	23
+; TEXT-01-NEXT: xorl	%eax, %eax
+; TEXT-01-NEXT: addq	$40, %rsp
+; TEXT-01-NEXT: retq
+; TEXT-01-NEXT: retq
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: int3
+; TEXT-01-NEXT: retq
+
+; HEADERS-10: AddressOfEntryPoint: 0x2020
+; TEXT-10: Disassembly of section .text:
+; TEXT-10-NEXT: .text:
+; TEXT-10-NEXT: retq
+; TEXT-10-NEXT: nopw    %cs:(%rax,%rax)
+; TEXT-10-NEXT: retq
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: int3
+; TEXT-10-NEXT: subq	$40, %rsp
+; TEXT-10-NEXT: callq	-41
+; TEXT-10-NEXT: xorl	%eax, %eax
+; TEXT-10-NEXT: addq	$40, %rsp
+; TEXT-10-NEXT: retq
+
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc"
+
+define i32 @main() {
+  call void @foo()
+  ret i32 0
+}
+
+declare void @foo()
+
+$f1 = comdat any
+define i32 @f1() comdat($f1) {
+  ret i32 1
+}
+
+$f2 = comdat any
+define i32 @f2() comdat($f2) {
+  ret i32 2
+}
+
+define internal void @internal() {
+  ret void
+}