1 ; REQUIRES: x86-registered-target
3 ; Test devirtualization through the thin link and backend.
5 ; Generate split module with summary for hybrid Thin/Regular LTO WPD.
6 ; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s
8 ; Check that we have module flag showing splitting enabled, and that we don't
9 ; generate summary information needed for index-based WPD.
10 ; RUN: llvm-modextract -b -n=0 %t.o -o %t.o.0
11 ; RUN: llvm-dis -o - %t.o.0 | FileCheck %s --check-prefix=ENABLESPLITFLAG --implicit-check-not=vTableFuncs --implicit-check-not=typeidCompatibleVTable
12 ; RUN: llvm-modextract -b -n=1 %t.o -o %t.o.1
13 ; RUN: llvm-dis -o - %t.o.1 | FileCheck %s --check-prefix=ENABLESPLITFLAG --implicit-check-not=vTableFuncs --implicit-check-not=typeidCompatibleVTable
14 ; ENABLESPLITFLAG: !{i32 1, !"EnableSplitLTOUnit", i32 1}
16 ; Generate unsplit module with summary for ThinLTO index-based WPD.
17 ; RUN: opt -thinlto-bc -o %t2.o %s
19 ; Check that we don't have module flag when splitting not enabled for ThinLTO,
20 ; and that we generate summary information needed for index-based WPD.
21 ; RUN: llvm-dis -o - %t2.o | FileCheck %s --check-prefix=NOENABLESPLITFLAG
22 ; NOENABLESPLITFLAG-DAG: !{i32 1, !"EnableSplitLTOUnit", i32 0}
23 ; NOENABLESPLITFLAG-DAG: [[An:\^[0-9]+]] = gv: (name: "_ZN1A1nEi"
24 ; NOENABLESPLITFLAG-DAG: [[Bf:\^[0-9]+]] = gv: (name: "_ZN1B1fEi"
25 ; NOENABLESPLITFLAG-DAG: [[Cf:\^[0-9]+]] = gv: (name: "_ZN1C1fEi"
26 ; NOENABLESPLITFLAG-DAG: [[Dm:\^[0-9]+]] = gv: (name: "_ZN1D1mEi"
27 ; NOENABLESPLITFLAG-DAG: [[B:\^[0-9]+]] = gv: (name: "_ZTV1B", {{.*}} vTableFuncs: ((virtFunc: [[Bf]], offset: 16), (virtFunc: [[An]], offset: 24)), refs: ([[Bf]], [[An]])
28 ; NOENABLESPLITFLAG-DAG: [[C:\^[0-9]+]] = gv: (name: "_ZTV1C", {{.*}} vTableFuncs: ((virtFunc: [[Cf]], offset: 16), (virtFunc: [[An]], offset: 24)), refs: ([[An]], [[Cf]])
29 ; NOENABLESPLITFLAG-DAG: [[D:\^[0-9]+]] = gv: (name: "_ZTV1D", {{.*}} vTableFuncs: ((virtFunc: [[Dm]], offset: 16)), refs: ([[Dm]])
30 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1A", summary: ((offset: 16, [[B]]), (offset: 16, [[C]])))
31 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1B", summary: ((offset: 16, [[B]])))
32 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1C", summary: ((offset: 16, [[C]])))
33 ; Type Id on _ZTV1D should have been promoted
34 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "1.{{.*}}", summary: ((offset: 16, [[D]])))
36 ; Legacy PM, Index based WPD
37 ; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \
38 ; RUN: -whole-program-visibility \
40 ; RUN: -r=%t2.o,test,px \
41 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
42 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
43 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
44 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
45 ; RUN: -r=%t2.o,_ZTV1B,px \
46 ; RUN: -r=%t2.o,_ZTV1C,px \
47 ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK
48 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
50 ; Check that we're able to prevent specific function from being
51 ; devirtualized when running index based WPD.
52 ; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \
53 ; RUN: -whole-program-visibility \
54 ; RUN: -wholeprogramdevirt-skip=_ZN1A1nEi \
56 ; RUN: -r=%t2.o,test,px \
57 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
58 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
59 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
60 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
61 ; RUN: -r=%t2.o,_ZTV1B,px \
62 ; RUN: -r=%t2.o,_ZTV1C,px \
63 ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=SKIP
65 ; New PM, Index based WPD
66 ; RUN: llvm-lto2 run %t2.o -save-temps -use-new-pm -pass-remarks=. \
67 ; RUN: -whole-program-visibility \
69 ; RUN: -r=%t2.o,test,px \
70 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
71 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
72 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
73 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
74 ; RUN: -r=%t2.o,_ZTV1B,px \
75 ; RUN: -r=%t2.o,_ZTV1C,px \
76 ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK
77 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
80 ; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436.
81 ; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \
82 ; RUN: -whole-program-visibility \
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 --check-prefix=REMARK --dump-input=fail
100 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
103 ; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436.
104 ; RUN: llvm-lto2 run %t.o -save-temps -use-new-pm -pass-remarks=. \
105 ; RUN: -whole-program-visibility \
106 ; RUN: -verify-machineinstrs=0 \
108 ; RUN: -r=%t.o,test,px \
109 ; RUN: -r=%t.o,_ZN1A1nEi,p \
110 ; RUN: -r=%t.o,_ZN1B1fEi,p \
111 ; RUN: -r=%t.o,_ZN1C1fEi,p \
112 ; RUN: -r=%t.o,_ZN1D1mEi,p \
113 ; RUN: -r=%t.o,_ZTV1B, \
114 ; RUN: -r=%t.o,_ZTV1C, \
115 ; RUN: -r=%t.o,_ZTV1D, \
116 ; RUN: -r=%t.o,_ZN1A1nEi, \
117 ; RUN: -r=%t.o,_ZN1B1fEi, \
118 ; RUN: -r=%t.o,_ZN1C1fEi, \
119 ; RUN: -r=%t.o,_ZN1D1mEi, \
120 ; RUN: -r=%t.o,_ZTV1B,px \
121 ; RUN: -r=%t.o,_ZTV1C,px \
122 ; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail
123 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
125 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi
126 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi
128 ; SKIP-NOT: devirtualized a call to _ZN1A1nEi
130 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
131 target triple = "x86_64-grtev4-linux-gnu"
133 %struct.A = type { i32 (...)** }
134 %struct.B = type { %struct.A }
135 %struct.C = type { %struct.A }
136 %struct.D = type { i32 (...)** }
138 @_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
139 @_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
140 @_ZTV1D = constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3
143 ; CHECK-IR-LABEL: define i32 @test
144 define i32 @test(%struct.A* %obj, %struct.D* %obj2, i32 %a) {
146 %0 = bitcast %struct.A* %obj to i8***
147 %vtable = load i8**, i8*** %0
148 %1 = bitcast i8** %vtable to i8*
149 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A")
150 call void @llvm.assume(i1 %p)
151 %fptrptr = getelementptr i8*, i8** %vtable, i32 1
152 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)**
153 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8
155 ; Check that the call was devirtualized.
156 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi
157 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a)
159 %3 = bitcast i8** %vtable to i32 (%struct.A*, i32)**
160 %fptr22 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %3, align 8
162 ; We still have to call it as virtual.
163 ; CHECK-IR: %call3 = tail call i32 %fptr22
164 %call3 = tail call i32 %fptr22(%struct.A* nonnull %obj, i32 %call)
166 %4 = bitcast %struct.D* %obj2 to i8***
167 %vtable2 = load i8**, i8*** %4
168 %5 = bitcast i8** %vtable2 to i8*
169 %p2 = call i1 @llvm.type.test(i8* %5, metadata !4)
170 call void @llvm.assume(i1 %p2)
172 %6 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)**
173 %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %6, align 8
175 ; Check that the call was devirtualized.
176 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi
177 %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %call3)
180 ; CHECK-IR-LABEL: ret i32
183 declare i1 @llvm.type.test(i8*, metadata)
184 declare void @llvm.assume(i1)
186 define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 {
190 define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 {
194 define i32 @_ZN1C1fEi(%struct.C* %this, i32 %a) #0 {
198 define i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) #0 {
202 ; Make sure we don't inline or otherwise optimize out the direct calls.
203 attributes #0 = { noinline optnone }
205 !0 = !{i64 16, !"_ZTS1A"}
206 !1 = !{i64 16, !"_ZTS1B"}
207 !2 = !{i64 16, !"_ZTS1C"}