1 ; Require asserts for -debug-only
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
8 ; RUN: llvm-lto -exported-symbol=_main -thinlto-action=internalize %t1.bc -thinlto-index=%t.index.bc -o - | llvm-dis -o - | FileCheck %s
9 ; RUN: llvm-lto -exported-symbol=_main -thinlto-action=internalize %t2.bc -thinlto-index=%t.index.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=CHECK2
11 ; RUN: llvm-lto -exported-symbol=_main -thinlto-action=run -stats %t1.bc %t2.bc 2>&1 | FileCheck %s --check-prefix=STATS
12 ; RUN: llvm-nm %t1.bc.thinlto.o | FileCheck %s --check-prefix=CHECK-NM
14 ; RUN: llvm-lto2 run %t1.bc %t2.bc -o %t.out -save-temps -stats \
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 %t1.bc,_live_linkonce_odr_func,l \
22 ; RUN: -r %t1.bc,_live_weak_odr_func,l \
23 ; RUN: -r %t1.bc,_linkonceodralias,pl \
24 ; RUN: -r %t1.bc,_linkonceodrfuncwithalias,l \
25 ; RUN: -r %t1.bc,_linkonceodrfuncwithalias_caller,pl \
26 ; RUN: -r %t2.bc,_baz,pl \
27 ; RUN: -r %t2.bc,_boo,pl \
28 ; RUN: -r %t2.bc,_dead_func,l \
29 ; RUN: -r %t2.bc,_another_dead_func,pl \
30 ; RUN: -r %t2.bc,_linkonceodrfuncwithalias,pl \
31 ; RUN: -thinlto-threads=1 \
32 ; RUN: -disable-thinlto-funcattrs=0 \
33 ; RUN: -debug-only=function-import 2>&1 | FileCheck %s --check-prefix=DEBUG --check-prefix=STATS
34 ; RUN: llvm-dis < %t.out.1.3.import.bc | FileCheck %s --check-prefix=LTO2
35 ; RUN: llvm-dis < %t.out.2.3.import.bc | FileCheck %s --check-prefix=LTO2-CHECK2
36 ; RUN: llvm-nm %t.out.1 | FileCheck %s --check-prefix=CHECK2-NM
38 ; RUN: llvm-bcanalyzer -dump %t.out.index.bc | FileCheck %s --check-prefix=COMBINED
39 ; Live, NotEligibleForImport, dso_local, Internal
40 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=119
41 ; Live, dso_local, Internal
42 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=103
43 ; Live, Local, WeakODR
44 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=101
45 ; Live, Local, LinkOnceODR
46 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=99
47 ; Live, Local, AvailableExternally
48 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=97
49 ; Live, Local, External
50 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=96
51 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=96
52 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=96
54 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=64
55 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=64
56 ; COMBINED-DAG: <COMBINED_PROFILE {{.*}} op2=64
58 ; Dead-stripping on the index allows to internalize these,
59 ; and limit the import of @baz thanks to early pruning.
60 ; CHECK-NOT: available_externally {{.*}} @baz()
61 ; CHECK: @llvm.global_ctors =
62 ; CHECK: define internal void @_GLOBAL__I_a()
63 ; CHECK: define internal void @bar() {
64 ; CHECK: define internal void @bar_internal()
65 ; CHECK: define internal void @dead_func() {
66 ; CHECK-NOT: available_externally {{.*}} @baz()
67 ; LTO2-NOT: available_externally {{.*}} @baz()
68 ; LTO2: @llvm.global_ctors =
69 ; LTO2: define internal void @_GLOBAL__I_a()
70 ; LTO2: define internal void @bar() [[ATTR:#[0-9]+]] {
71 ; LTO2: define internal void @bar_internal()
72 ; LTO2-NOT: @dead_func()
73 ; LTO2-NOT: available_externally {{.*}} @baz()
75 ; Make sure we didn't internalize @boo, which is reachable via
77 ; CHECK2: define void @boo()
78 ; LTO2-CHECK2: define dso_local void @boo()
80 ; Make sure we keep @linkonceodrfuncwithalias in Input/deadstrip.ll alive as it
81 ; is reachable from @main.
82 ; LTO2-CHECK2: define weak_odr dso_local void @linkonceodrfuncwithalias() [[ATTR:#[0-9]+]] {
84 ; We should have eventually removed @baz since it was internalized and unused
87 ; The final binary should not contain any of the dead functions,
88 ; only main is expected because bar is expected to be inlined and stripped out.
95 ; DEBUG-DAG: Live root: 2412314959268824392 (llvm.global_ctors)
96 ; DEBUG-DAG: Live root: 15822663052811949562 (main)
97 ; DEBUG-DAG: Ignores Dead GUID: 7342339837106705152 (dead_func)
98 ; DEBUG-DAG: Ignores Dead GUID: 7546896869197086323 (baz)
99 ; DEBUG-DAG: Initialize import for 15611644523426561710 (boo)
100 ; DEBUG-DAG: Ignores Dead GUID: 2384416018110111308 (another_dead_func)
102 ; LTO2-DAG: attributes [[ATTR]] = { norecurse nounwind }
104 ; STATS: 3 function-import - Number of dead stripped symbols in index
106 ; Next test the case where Inputs/deadstrip.ll does not get a module index,
107 ; which will cause it to be handled by regular LTO in the new LTO API.
108 ; In that case there are uses of @dead_func in the regular LTO partition
109 ; and it shouldn't be internalized.
110 ; RUN: opt %p/Inputs/deadstrip.ll -o %t3.bc
111 ; RUN: llvm-lto2 run %t1.bc %t3.bc -o %t4.out -save-temps \
112 ; RUN: -r %t1.bc,_main,plx \
113 ; RUN: -r %t1.bc,_bar,pl \
114 ; RUN: -r %t1.bc,_dead_func,pl \
115 ; RUN: -r %t1.bc,_baz,l \
116 ; RUN: -r %t1.bc,_boo,l \
117 ; RUN: -r %t1.bc,_live_available_externally_func,l \
118 ; RUN: -r %t1.bc,_live_linkonce_odr_func,l \
119 ; RUN: -r %t1.bc,_live_weak_odr_func,l \
120 ; RUN: -r %t1.bc,_linkonceodralias,pl \
121 ; RUN: -r %t1.bc,_linkonceodrfuncwithalias,l \
122 ; RUN: -r %t1.bc,_linkonceodrfuncwithalias_caller,pl \
123 ; RUN: -r %t3.bc,_baz,pl \
124 ; RUN: -r %t3.bc,_boo,pl \
125 ; RUN: -r %t3.bc,_dead_func,l \
126 ; RUN: -r %t3.bc,_another_dead_func,pl \
127 ; RUN: -r %t3.bc,_linkonceodrfuncwithalias,pl
128 ; RUN: llvm-dis < %t4.out.1.3.import.bc | FileCheck %s --check-prefix=CHECK-NOTDEAD
129 ; RUN: llvm-nm %t4.out.0 | FileCheck %s --check-prefix=CHECK-NM-NOTDEAD
131 ; We can't internalize @dead_func because of the use in the regular LTO
133 ; CHECK-NOTDEAD: define dso_local void @dead_func()
134 ; We also can't eliminate @baz because it is in the regular LTO partition
135 ; and called from @dead_func.
136 ; CHECK-NM-NOTDEAD: T _baz
138 target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
139 target triple = "x86_64-apple-macosx10.11.0"
142 @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__I_a, ptr null }]
148 define internal void @_GLOBAL__I_a() #1 section "__TEXT,__StaticInit,regular,pure_instructions" {
158 define internal void @bar_internal() {
162 define void @dead_func() {
165 call void @bar_internal()
170 define linkonce_odr void @live_linkonce_odr_func() {
174 define weak_odr void @live_weak_odr_func() {
178 define available_externally void @live_available_externally_func() {
182 ; This alias will set its base object in this file (linkonceodrfuncwithalias)
184 ; We want to make sure the @linkonceodrfuncwithalias copy in Input/deadstrip.ll
185 ; is also scanned when computing reachability.
186 @linkonceodralias = linkonce_odr alias void (), ptr @linkonceodrfuncwithalias
188 define linkonce_odr void @linkonceodrfuncwithalias() {
193 define void @linkonceodrfuncwithalias_caller() {
195 call void @linkonceodrfuncwithalias()
200 define void @main() {
202 call void @bar_internal()
203 call void @live_linkonce_odr_func()
204 call void @live_weak_odr_func()
205 call void @live_available_externally_func()
206 call void @linkonceodrfuncwithalias_caller()
207 call void @linkonceodralias()