| ; Test of comdat handling with mixed thinlto and regular lto compilation. |
| |
| ; This module is compiled with ThinLTO |
| ; RUN: opt -module-summary -o %t1.o %s |
| ; Input module compiled for regular LTO |
| ; RUN: opt -o %t2.o %p/Inputs/comdat-mixed-lto.ll |
| |
| ; The copy of C from this module is prevailing. The copy of C from the |
| ; regular LTO module is not prevailing, and will be dropped to |
| ; available_externally. |
| ; RUN: llvm-lto2 run -r=%t1.o,C,pl -r=%t2.o,C,l -r=%t2.o,testglobfunc,lxp -r=%t1.o,testglobfunc,lx -o %t3 %t1.o %t2.o -save-temps |
| |
| ; The Input module (regular LTO) is %t3.0. Check to make sure that we removed |
| ; __cxx_global_var_init and testglobfunc from comdat. Also check to ensure |
| ; that testglobfunc was dropped to available_externally. Otherwise we would |
| ; have linker multiply defined errors as it is no longer in a comdat and |
| ; would clash with the copy from this module. |
| ; RUN: llvm-dis %t3.0.0.preopt.bc -o - | FileCheck %s |
| ; CHECK: define internal void @__cxx_global_var_init() section ".text.startup" { |
| ; CHECK: define available_externally dso_local void @testglobfunc() section ".text.startup" { |
| |
| ; ModuleID = 'comdat-mixed-lto.o' |
| source_filename = "comdat-mixed-lto.cpp" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| %"class.Test::ptr" = type { i32 } |
| |
| $C = comdat any |
| |
| @C = linkonce_odr global %"class.Test::ptr" zeroinitializer, comdat, align 4 |
| @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @__cxx_global_var_init, i8* bitcast (%"class.Test::ptr"* @C to i8*) }] |
| define void @testglobfunc() #1 section ".text.startup" comdat($C) { |
| entry: |
| ret void |
| } |
| |
| ; Function Attrs: noinline uwtable |
| define internal void @__cxx_global_var_init() #1 section ".text.startup" comdat($C) { |
| entry: |
| ret void |
| } |