1; Require asserts for -debug-only 2; REQUIRES: asserts 3 4; RUN: opt -module-summary %s -o %t1.bc 5; RUN: opt -module-summary %p/Inputs/deadstrip.ll -o %t2.bc 6; RUN: llvm-lto -thinlto-action=thinlink -o %t.index.bc %t1.bc %t2.bc 7 8; RUN: llvm-lto -exported-symbol=_main -thinlto-action=promote %t1.bc -thinlto-index=%t.index.bc -o - | llvm-lto -exported-symbol=_main -thinlto-action=internalize -thinlto-index %t.index.bc -thinlto-module-id=%t1.bc - -o - | llvm-dis -o - | FileCheck %s 9; RUN: llvm-lto -exported-symbol=_main -thinlto-action=promote %t2.bc -thinlto-index=%t.index.bc -o - | llvm-lto -exported-symbol=_main -thinlto-action=internalize -thinlto-index %t.index.bc -thinlto-module-id=%t2.bc - -o - | llvm-dis -o - | FileCheck %s --check-prefix=CHECK2 10 11; RUN: llvm-lto -exported-symbol=_main -thinlto-action=run %t1.bc %t2.bc 12; RUN: llvm-nm %t1.bc.thinlto.o | FileCheck %s --check-prefix=CHECK-NM 13 14; RUN: llvm-lto2 run %t1.bc %t2.bc -o %t.out -save-temps \ 15; RUN: -r %t1.bc,_main,plx \ 16; RUN: -r %t1.bc,_bar,pl \ 17; RUN: -r %t1.bc,_dead_func,pl \ 18; RUN: -r %t1.bc,_baz,l \ 19; RUN: -r %t1.bc,_boo,l \ 20; RUN: -r %t1.bc,_live_available_externally_func,l \ 21; RUN: -r %t2.bc,_baz,pl \ 22; RUN: -r %t2.bc,_boo,pl \ 23; RUN: -r %t2.bc,_dead_func,l \ 24; RUN: -r %t2.bc,_another_dead_func,pl \ 25; RUN: -thinlto-threads=1 \ 26; RUN: -debug-only=function-import 2>&1 | FileCheck %s --check-prefix=DEBUG 27; RUN: llvm-dis < %t.out.1.3.import.bc | FileCheck %s --check-prefix=LTO2 28; RUN: llvm-dis < %t.out.2.3.import.bc | FileCheck %s --check-prefix=LTO2-CHECK2 29; RUN: llvm-nm %t.out.1 | FileCheck %s --check-prefix=CHECK2-NM 30 31; RUN: llvm-bcanalyzer -dump %t.out.index.bc | FileCheck %s --check-prefix=COMBINED 32; Live, NotEligibleForImport, dso_local, Internal 33; COMBINED-DAG: <COMBINED {{.*}} op2=119 34; Live, dso_local, Internal 35; COMBINED-DAG: <COMBINED {{.*}} op2=103 36; Live, Local, AvailableExternally 37; COMBINED-DAG: <COMBINED {{.*}} op2=97 38; Live, Local, External 39; COMBINED-DAG: <COMBINED {{.*}} op2=96 40; COMBINED-DAG: <COMBINED {{.*}} op2=96 41; COMBINED-DAG: <COMBINED {{.*}} op2=96 42; Local, (Dead) 43; COMBINED-DAG: <COMBINED {{.*}} op2=64 44; COMBINED-DAG: <COMBINED {{.*}} op2=64 45; COMBINED-DAG: <COMBINED {{.*}} op2=64 46 47; Dead-stripping on the index allows to internalize these, 48; and limit the import of @baz thanks to early pruning. 49; CHECK-NOT: available_externally {{.*}} @baz() 50; CHECK: @llvm.global_ctors = 51; CHECK: define internal void @_GLOBAL__I_a() 52; CHECK: define internal void @bar() { 53; CHECK: define internal void @bar_internal() 54; CHECK: define internal void @dead_func() { 55; CHECK-NOT: available_externally {{.*}} @baz() 56; LTO2-NOT: available_externally {{.*}} @baz() 57; LTO2: @llvm.global_ctors = 58; LTO2: define internal void @_GLOBAL__I_a() 59; LTO2: define internal void @bar() { 60; LTO2: define internal void @bar_internal() 61; LTO2-NOT: @dead_func() 62; LTO2-NOT: available_externally {{.*}} @baz() 63 64; Make sure we didn't internalize @boo, which is reachable via 65; llvm.global_ctors 66; CHECK2: define void @boo() 67; LTO2-CHECK2: define dso_local void @boo() 68; We should have eventually removed @baz since it was internalized and unused 69; CHECK2-NM-NOT: _baz 70 71; The final binary should not contain any of the dead functions, 72; only main is expected because bar is expected to be inlined and stripped out. 73; CHECK-NM-NOT: bar 74; CHECK-NM-NOT: dead 75; CHECK-NM: T _main 76; CHECK-NM-NOT: bar 77; CHECK-NM-NOT: dead 78 79; DEBUG-DAG: Live root: 2412314959268824392 (llvm.global_ctors) 80; DEBUG-DAG: Live root: 15822663052811949562 (main) 81; DEBUG-DAG: Ignores Dead GUID: 7342339837106705152 (dead_func) 82; DEBUG-DAG: Ignores Dead GUID: 7546896869197086323 (baz) 83; DEBUG-DAG: Initialize import for 15611644523426561710 (boo) 84; DEBUG-DAG: Ignores Dead GUID: 2384416018110111308 (another_dead_func) 85 86; Next test the case where Inputs/deadstrip.ll does not get a module index, 87; which will cause it to be handled by regular LTO in the new LTO API. 88; In that case there are uses of @dead_func in the regular LTO partition 89; and it shouldn't be internalized. 90; RUN: opt %p/Inputs/deadstrip.ll -o %t3.bc 91; RUN: llvm-lto2 run %t1.bc %t3.bc -o %t4.out -save-temps \ 92; RUN: -r %t1.bc,_main,plx \ 93; RUN: -r %t1.bc,_bar,pl \ 94; RUN: -r %t1.bc,_dead_func,pl \ 95; RUN: -r %t1.bc,_baz,l \ 96; RUN: -r %t1.bc,_boo,l \ 97; RUN: -r %t1.bc,_live_available_externally_func,l \ 98; RUN: -r %t3.bc,_baz,pl \ 99; RUN: -r %t3.bc,_boo,pl \ 100; RUN: -r %t3.bc,_dead_func,l \ 101; RUN: -r %t3.bc,_another_dead_func,pl 102; RUN: llvm-dis < %t4.out.1.3.import.bc | FileCheck %s --check-prefix=CHECK-NOTDEAD 103; RUN: llvm-nm %t4.out.0 | FileCheck %s --check-prefix=CHECK-NM-NOTDEAD 104 105; We can't internalize @dead_func because of the use in the regular LTO 106; partition. 107; CHECK-NOTDEAD: define dso_local void @dead_func() 108; We also can't eliminate @baz because it is in the regular LTO partition 109; and called from @dead_func. 110; CHECK-NM-NOTDEAD: T _baz 111 112target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 113target triple = "x86_64-apple-macosx10.11.0" 114 115 116@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @_GLOBAL__I_a }] 117 118declare void @baz() 119 120declare void @boo() 121 122define internal void @_GLOBAL__I_a() #1 section "__TEXT,__StaticInit,regular,pure_instructions" { 123entry: 124 call void @boo() 125 ret void 126} 127 128define void @bar() { 129 ret void 130} 131 132define internal void @bar_internal() { 133 ret void 134} 135 136define void @dead_func() { 137 call void @bar() 138 call void @baz() 139 call void @bar_internal() 140 ret void 141} 142 143define available_externally void @live_available_externally_func() { 144 ret void 145} 146 147define void @main() { 148 call void @bar() 149 call void @bar_internal() 150 call void @live_available_externally_func() 151 ret void 152} 153