1 ; Test of comdat handling with mixed thinlto and regular lto compilation.
3 ; This module is compiled with ThinLTO
4 ; RUN: opt -module-summary -o %t1.o %s
5 ; Input module compiled for regular LTO
6 ; RUN: opt -o %t2.o %p/Inputs/comdat-mixed-lto.ll
8 ; The copy of C from this module is prevailing. The copy of C from the
9 ; regular LTO module is not prevailing, and will be dropped to
10 ; available_externally.
11 ; RUN: llvm-lto2 run -r=%t1.o,C,pl -r=%t2.o,C,l -r=%t1.o,testglobfunc,lxp -r=%t2.o,testglobfunc,lx -o %t3 %t1.o %t2.o -save-temps
13 ; The Input module (regular LTO) is %t3.0. Check to make sure that we removed
14 ; __cxx_global_var_init and testglobfunc from comdat. Also check to ensure
15 ; that testglobfunc was dropped to available_externally. Otherwise we would
16 ; have linker multiply defined errors as it is no longer in a comdat and
17 ; would clash with the copy from this module.
18 ; RUN: llvm-dis %t3.0.0.preopt.bc -o - | FileCheck %s
20 ; CHECK: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @__cxx_global_var_init, ptr @C }]
21 ; CHECK: @C = available_externally dso_local global %"class.Test::ptr" zeroinitializer, align 4
23 ; CHECK: declare dso_local void @__cxx_global_var_init() section ".text.startup"
26 ; Check the behavior with the prevailing testglobfunc in %t2.o.
27 ; RUN: llvm-lto2 run -r=%t1.o,C,pl -r=%t2.o,C,l -r=%t1.o,testglobfunc,lx -r=%t2.o,testglobfunc,plx -o %t4 %t1.o %t2.o -save-temps
28 ; RUN: llvm-dis %t4.0.0.preopt.bc -o - | FileCheck %s --check-prefix=CHECK2
30 ; CHECK2: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @__cxx_global_var_init, ptr @C }]
31 ; CHECK2: @C = available_externally dso_local global %"class.Test::ptr" zeroinitializer, align 4
32 ; CHECK2: declare dso_local void @__cxx_global_var_init() section ".text.startup"
33 ; CHECK2: define available_externally dso_local void @testglobfunc() section ".text.startup" {
35 ; ModuleID = 'comdat-mixed-lto.o'
36 source_filename = "comdat-mixed-lto.cpp"
37 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
38 target triple = "x86_64-unknown-linux-gnu"
40 %"class.Test::ptr" = type { i32 }
44 @C = linkonce_odr global %"class.Test::ptr" zeroinitializer, comdat, align 4
45 @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @__cxx_global_var_init, i8* bitcast (%"class.Test::ptr"* @C to i8*) }]
46 define void @testglobfunc() #1 section ".text.startup" comdat($C) {
51 ; Function Attrs: noinline uwtable
52 define internal void @__cxx_global_var_init() #1 section ".text.startup" comdat($C) {