1 ; REQUIRES: x86-registered-target
3 ; Test devirtualization through the thin link and backend, when vtables
4 ; have vcall_visibility metadata with public visibility.
7 ; Generate unsplit module with summary for ThinLTO index-based WPD.
8 ; RUN: opt -thinlto-bc -o %t2.o %s
9 ; RUN: llvm-lto2 run %t2.o -save-temps -use-new-pm -pass-remarks=. \
10 ; RUN: -whole-program-visibility \
12 ; RUN: -r=%t2.o,test,px \
13 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
14 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
15 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
16 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
17 ; RUN: -r=%t2.o,_ZTV1B,px \
18 ; RUN: -r=%t2.o,_ZTV1C,px \
19 ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK
20 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
23 ; Generate split module with summary for hybrid Thin/Regular LTO WPD.
24 ; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s
25 ; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436.
26 ; RUN: llvm-lto2 run %t.o -save-temps -use-new-pm -pass-remarks=. \
27 ; RUN: -whole-program-visibility \
28 ; RUN: -verify-machineinstrs=0 \
30 ; RUN: -r=%t.o,test,px \
31 ; RUN: -r=%t.o,_ZN1A1nEi,p \
32 ; RUN: -r=%t.o,_ZN1B1fEi,p \
33 ; RUN: -r=%t.o,_ZN1C1fEi,p \
34 ; RUN: -r=%t.o,_ZN1D1mEi,p \
35 ; RUN: -r=%t.o,_ZTV1B, \
36 ; RUN: -r=%t.o,_ZTV1C, \
37 ; RUN: -r=%t.o,_ZTV1D, \
38 ; RUN: -r=%t.o,_ZN1A1nEi, \
39 ; RUN: -r=%t.o,_ZN1B1fEi, \
40 ; RUN: -r=%t.o,_ZN1C1fEi, \
41 ; RUN: -r=%t.o,_ZN1D1mEi, \
42 ; RUN: -r=%t.o,_ZTV1B,px \
43 ; RUN: -r=%t.o,_ZTV1C,px \
44 ; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail
45 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
48 ; RUN: opt -o %t4.o %s
49 ; RUN: llvm-lto2 run %t4.o -save-temps -use-new-pm -pass-remarks=. \
50 ; RUN: -whole-program-visibility \
52 ; RUN: -r=%t4.o,test,px \
53 ; RUN: -r=%t4.o,_ZN1A1nEi,p \
54 ; RUN: -r=%t4.o,_ZN1B1fEi,p \
55 ; RUN: -r=%t4.o,_ZN1C1fEi,p \
56 ; RUN: -r=%t4.o,_ZN1D1mEi,p \
57 ; RUN: -r=%t4.o,_ZTV1B,px \
58 ; RUN: -r=%t4.o,_ZTV1C,px \
59 ; RUN: -r=%t4.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK
60 ; RUN: llvm-dis %t5.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
62 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi
63 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi
65 ; Try everything again but without -whole-program-visibility to confirm
69 ; RUN: llvm-lto2 run %t2.o -save-temps -use-new-pm -pass-remarks=. \
71 ; RUN: -r=%t2.o,test,px \
72 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
73 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
74 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
75 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
76 ; RUN: -r=%t2.o,_ZTV1B,px \
77 ; RUN: -r=%t2.o,_ZTV1C,px \
78 ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty
79 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR
82 ; RUN: llvm-lto2 run %t.o -save-temps -use-new-pm -pass-remarks=. \
83 ; RUN: -verify-machineinstrs=0 \
85 ; RUN: -r=%t.o,test,px \
86 ; RUN: -r=%t.o,_ZN1A1nEi,p \
87 ; RUN: -r=%t.o,_ZN1B1fEi,p \
88 ; RUN: -r=%t.o,_ZN1C1fEi,p \
89 ; RUN: -r=%t.o,_ZN1D1mEi,p \
90 ; RUN: -r=%t.o,_ZTV1B, \
91 ; RUN: -r=%t.o,_ZTV1C, \
92 ; RUN: -r=%t.o,_ZTV1D, \
93 ; RUN: -r=%t.o,_ZN1A1nEi, \
94 ; RUN: -r=%t.o,_ZN1B1fEi, \
95 ; RUN: -r=%t.o,_ZN1C1fEi, \
96 ; RUN: -r=%t.o,_ZN1D1mEi, \
97 ; RUN: -r=%t.o,_ZTV1B,px \
98 ; RUN: -r=%t.o,_ZTV1C,px \
99 ; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty
100 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR
103 ; RUN: llvm-lto2 run %t4.o -save-temps -use-new-pm -pass-remarks=. \
105 ; RUN: -r=%t4.o,test,px \
106 ; RUN: -r=%t4.o,_ZN1A1nEi,p \
107 ; RUN: -r=%t4.o,_ZN1B1fEi,p \
108 ; RUN: -r=%t4.o,_ZN1C1fEi,p \
109 ; RUN: -r=%t4.o,_ZN1D1mEi,p \
110 ; RUN: -r=%t4.o,_ZTV1B,px \
111 ; RUN: -r=%t4.o,_ZTV1C,px \
112 ; RUN: -r=%t4.o,_ZTV1D,px 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty
113 ; RUN: llvm-dis %t5.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR
115 ; Try index-based WPD again with both -whole-program-visibility and
116 ; -disable-whole-program-visibility to confirm the latter overrides
117 ; the former and that WPD fails.
118 ; RUN: llvm-lto2 run %t2.o -save-temps -use-new-pm -pass-remarks=. \
119 ; RUN: -whole-program-visibility \
120 ; RUN: -disable-whole-program-visibility \
122 ; RUN: -r=%t2.o,test,px \
123 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
124 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
125 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
126 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
127 ; RUN: -r=%t2.o,_ZTV1B,px \
128 ; RUN: -r=%t2.o,_ZTV1C,px \
129 ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty
130 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR
132 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
133 target triple = "x86_64-grtev4-linux-gnu"
135 %struct.A = type { i32 (...)** }
136 %struct.B = type { %struct.A }
137 %struct.C = type { %struct.A }
138 %struct.D = type { i32 (...)** }
140 @_ZTV1B = constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.B*, i32)* @_ZN1B1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !type !1, !vcall_visibility !5
141 @_ZTV1C = constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.C*, i32)* @_ZN1C1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !type !2, !vcall_visibility !5
142 @_ZTV1D = constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3, !vcall_visibility !5
145 ; CHECK-IR-LABEL: define i32 @test
146 define i32 @test(%struct.A* %obj, %struct.D* %obj2, i32 %a) {
148 %0 = bitcast %struct.A* %obj to i8***
149 %vtable = load i8**, i8*** %0
150 %1 = bitcast i8** %vtable to i8*
151 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A")
152 call void @llvm.assume(i1 %p)
153 %fptrptr = getelementptr i8*, i8** %vtable, i32 1
154 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)**
155 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8
157 ; Check that the call was devirtualized.
158 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi
159 ; CHECK-NODEVIRT-IR: %call = tail call i32 %fptr1
160 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a)
162 %3 = bitcast i8** %vtable to i32 (%struct.A*, i32)**
163 %fptr22 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %3, align 8
165 ; We still have to call it as virtual.
166 ; CHECK-IR: %call3 = tail call i32 %fptr22
167 ; CHECK-NODEVIRT-IR: %call3 = tail call i32 %fptr22
168 %call3 = tail call i32 %fptr22(%struct.A* nonnull %obj, i32 %call)
170 %4 = bitcast %struct.D* %obj2 to i8***
171 %vtable2 = load i8**, i8*** %4
172 %5 = bitcast i8** %vtable2 to i8*
173 %p2 = call i1 @llvm.type.test(i8* %5, metadata !4)
174 call void @llvm.assume(i1 %p2)
176 %6 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)**
177 %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %6, align 8
179 ; Check that the call was devirtualized.
180 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi
181 ; CHECK-NODEVIRT-IR: %call4 = tail call i32 %fptr33
182 %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %call3)
185 ; CHECK-IR-LABEL: ret i32
188 declare i1 @llvm.type.test(i8*, metadata)
189 declare void @llvm.assume(i1)
191 define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 {
195 define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 {
199 define i32 @_ZN1C1fEi(%struct.C* %this, i32 %a) #0 {
203 define i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) #0 {
207 ; Make sure we don't inline or otherwise optimize out the direct calls.
208 attributes #0 = { noinline optnone }
210 !0 = !{i64 16, !"_ZTS1A"}
211 !1 = !{i64 16, !"_ZTS1B"}
212 !2 = !{i64 16, !"_ZTS1C"}