1 ; Test of comdat handling with mixed thinlto and regular lto compilation. 2 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 7 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=%t2.o,testglobfunc,lxp -r=%t1.o,testglobfunc,lx -o %t3 %t1.o %t2.o -save-temps 12 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 19 ; CHECK: define internal void @__cxx_global_var_init() section ".text.startup" { 20 ; CHECK: define available_externally dso_local void @testglobfunc() section ".text.startup" { 21 22 ; ModuleID = 'comdat-mixed-lto.o' 23 source_filename = "comdat-mixed-lto.cpp" 24 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 25 target triple = "x86_64-unknown-linux-gnu" 26 27 %"class.Test::ptr" = type { i32 } 28 29 $C = comdat any 30 31 @C = linkonce_odr global %"class.Test::ptr" zeroinitializer, comdat, align 4 32 @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @__cxx_global_var_init, i8* bitcast (%"class.Test::ptr"* @C to i8*) }] 33 define void @testglobfunc() #1 section ".text.startup" comdat($C) { 34 entry: 35 ret void 36 } 37 38 ; Function Attrs: noinline uwtable 39 define internal void @__cxx_global_var_init() #1 section ".text.startup" comdat($C) { 40 entry: 41 ret void 42 } 43
