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=. \
11 ; RUN: -r=%t2.o,test,px \
12 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
13 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
14 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
15 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
16 ; RUN: -r=%t2.o,_ZTV1B,px \
17 ; RUN: -r=%t2.o,_ZTV1C,px \
18 ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK
19 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
22 ; Generate split module with summary for hybrid Thin/Regular LTO WPD.
23 ; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s
24 ; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436.
25 ; RUN: llvm-lto2 run %t.o -save-temps -use-new-pm -pass-remarks=. \
26 ; RUN: -verify-machineinstrs=0 \
28 ; RUN: -r=%t.o,test,px \
29 ; RUN: -r=%t.o,_ZN1A1nEi,p \
30 ; RUN: -r=%t.o,_ZN1B1fEi,p \
31 ; RUN: -r=%t.o,_ZN1C1fEi,p \
32 ; RUN: -r=%t.o,_ZN1D1mEi,p \
33 ; RUN: -r=%t.o,_ZTV1B, \
34 ; RUN: -r=%t.o,_ZTV1C, \
35 ; RUN: -r=%t.o,_ZTV1D, \
36 ; RUN: -r=%t.o,_ZN1A1nEi, \
37 ; RUN: -r=%t.o,_ZN1B1fEi, \
38 ; RUN: -r=%t.o,_ZN1C1fEi, \
39 ; RUN: -r=%t.o,_ZN1D1mEi, \
40 ; RUN: -r=%t.o,_ZTV1B,px \
41 ; RUN: -r=%t.o,_ZTV1C,px \
42 ; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail
43 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
46 ; RUN: opt -o %t4.o %s
47 ; RUN: llvm-lto2 run %t4.o -save-temps -use-new-pm -pass-remarks=. \
48 ; RUN: -whole-program-visibility \
50 ; RUN: -r=%t4.o,test,px \
51 ; RUN: -r=%t4.o,_ZN1A1nEi,p \
52 ; RUN: -r=%t4.o,_ZN1B1fEi,p \
53 ; RUN: -r=%t4.o,_ZN1C1fEi,p \
54 ; RUN: -r=%t4.o,_ZN1D1mEi,p \
55 ; RUN: -r=%t4.o,_ZTV1B,px \
56 ; RUN: -r=%t4.o,_ZTV1C,px \
57 ; RUN: -r=%t4.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK
58 ; RUN: llvm-dis %t5.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
60 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi
61 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi
63 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
64 target triple = "x86_64-grtev4-linux-gnu"
66 %struct.A = type { i32 (...)** }
67 %struct.B = type { %struct.A }
68 %struct.C = type { %struct.A }
69 %struct.D = type { i32 (...)** }
71 @_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
72 @_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
73 @_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
76 ; CHECK-IR-LABEL: define i32 @test
77 define i32 @test(%struct.A* %obj, %struct.D* %obj2, i32 %a) {
79 %0 = bitcast %struct.A* %obj to i8***
80 %vtable = load i8**, i8*** %0
81 %1 = bitcast i8** %vtable to i8*
82 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A")
83 call void @llvm.assume(i1 %p)
84 %fptrptr = getelementptr i8*, i8** %vtable, i32 1
85 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)**
86 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8
88 ; Check that the call was devirtualized.
89 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi
90 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a)
92 %3 = bitcast i8** %vtable to i32 (%struct.A*, i32)**
93 %fptr22 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %3, align 8
95 ; We still have to call it as virtual.
96 ; CHECK-IR: %call3 = tail call i32 %fptr22
97 %call3 = tail call i32 %fptr22(%struct.A* nonnull %obj, i32 %call)
99 %4 = bitcast %struct.D* %obj2 to i8***
100 %vtable2 = load i8**, i8*** %4
101 %5 = bitcast i8** %vtable2 to i8*
102 %p2 = call i1 @llvm.type.test(i8* %5, metadata !4)
103 call void @llvm.assume(i1 %p2)
105 %6 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)**
106 %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %6, align 8
108 ; Check that the call was devirtualized.
109 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi
110 %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %call3)
113 ; CHECK-IR-LABEL: ret i32
116 declare i1 @llvm.type.test(i8*, metadata)
117 declare void @llvm.assume(i1)
119 define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 {
123 define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 {
127 define i32 @_ZN1C1fEi(%struct.C* %this, i32 %a) #0 {
131 define i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) #0 {
135 ; Make sure we don't inline or otherwise optimize out the direct calls.
136 attributes #0 = { noinline optnone }
138 !0 = !{i64 16, !"_ZTS1A"}
139 !1 = !{i64 16, !"_ZTS1B"}
140 !2 = !{i64 16, !"_ZTS1C"}