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: [[B_RV:\^[0-9]+]] = gv: (name: "_ZTV1B_RV", {{.*}} vTableFuncs: ((virtFunc: [[Bf]], offset: 8), (virtFunc: [[An]], offset: 12)), refs: ([[B_RV]], [[Bf]], [[An]])
31 ; NOENABLESPLITFLAG-DAG: [[C_RV:\^[0-9]+]] = gv: (name: "_ZTV1C_RV", {{.*}} vTableFuncs: ((virtFunc: [[Cf]], offset: 8), (virtFunc: [[An]], offset: 12)), refs: ([[C_RV]], [[An]], [[Cf]])
32 ; NOENABLESPLITFLAG-DAG: [[D_RV:\^[0-9]+]] = gv: (name: "_ZTV1D_RV", {{.*}} vTableFuncs: ((virtFunc: [[Dm]], offset: 8)), refs: ([[D_RV]], [[Dm]])
33 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1A", summary: ((offset: 16, [[B]]), (offset: 16, [[C]])))
34 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1B", summary: ((offset: 16, [[B]])))
35 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1C", summary: ((offset: 16, [[C]])))
36 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1A_RV", summary: ((offset: 8, [[B_RV]]), (offset: 8, [[C_RV]])))
37 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1B_RV", summary: ((offset: 8, [[B_RV]])))
38 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1C_RV", summary: ((offset: 8, [[C_RV]])))
39 ; Type Id on _ZTV1D should have been promoted
40 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "1.{{.*}}", summary: ((offset: 16, [[D]])))
41 ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "2.{{.*}}", summary: ((offset: 8, [[D_RV]])))
44 ; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \
45 ; RUN: -whole-program-visibility \
47 ; RUN: -r=%t2.o,test,px \
48 ; RUN: -r=%t2.o,test_rv,px \
49 ; RUN: -r=%t2.o,_ZN1A1nEi,p \
50 ; RUN: -r=%t2.o,_ZN1B1fEi,p \
51 ; RUN: -r=%t2.o,_ZN1C1fEi,p \
52 ; RUN: -r=%t2.o,_ZN1D1mEi,p \
53 ; RUN: -r=%t2.o,_ZTV1B,px \
54 ; RUN: -r=%t2.o,_ZTV1C,px \
55 ; RUN: -r=%t2.o,_ZTV1D,px \
56 ; RUN: -r=%t2.o,_ZTV1B_RV,px \
57 ; RUN: -r=%t2.o,_ZTV1C_RV,px \
58 ; RUN: -r=%t2.o,_ZTV1D_RV,px \
59 ; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK
60 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
62 ; Check that we're able to prevent specific function from being
63 ; devirtualized when running index based WPD.
64 ; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \
65 ; RUN: -whole-program-visibility \
66 ; RUN: -wholeprogramdevirt-skip=_ZN1A1nEi \
68 ; RUN: -r=%t2.o,test,px \
69 ; RUN: -r=%t2.o,test_rv,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 \
77 ; RUN: -r=%t2.o,_ZTV1B_RV,px \
78 ; RUN: -r=%t2.o,_ZTV1C_RV,px \
79 ; RUN: -r=%t2.o,_ZTV1D_RV,px \
80 ; RUN: 2>&1 | FileCheck %s --check-prefix=SKIP
82 ; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \
83 ; RUN: -whole-program-visibility \
85 ; RUN: -r=%t.o,test,px \
86 ; RUN: -r=%t.o,test_rv,px \
87 ; RUN: -r=%t.o,_ZN1A1nEi,p \
88 ; RUN: -r=%t.o,_ZN1B1fEi,p \
89 ; RUN: -r=%t.o,_ZN1C1fEi,p \
90 ; RUN: -r=%t.o,_ZN1D1mEi,p \
91 ; RUN: -r=%t.o,_ZTV1B, \
92 ; RUN: -r=%t.o,_ZTV1C, \
93 ; RUN: -r=%t.o,_ZTV1D, \
94 ; RUN: -r=%t.o,_ZTV1B_RV, \
95 ; RUN: -r=%t.o,_ZTV1C_RV, \
96 ; RUN: -r=%t.o,_ZTV1D_RV, \
97 ; RUN: -r=%t.o,_ZN1A1nEi, \
98 ; RUN: -r=%t.o,_ZN1B1fEi, \
99 ; RUN: -r=%t.o,_ZN1C1fEi, \
100 ; RUN: -r=%t.o,_ZN1D1mEi, \
101 ; RUN: -r=%t.o,_ZTV1B,px \
102 ; RUN: -r=%t.o,_ZTV1C,px \
103 ; RUN: -r=%t.o,_ZTV1D,px \
104 ; RUN: -r=%t.o,_ZTV1B_RV,px \
105 ; RUN: -r=%t.o,_ZTV1C_RV,px \
106 ; RUN: -r=%t.o,_ZTV1D_RV,px \
107 ; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail
108 ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
110 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi
111 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi
112 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi
113 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi
115 ; SKIP-NOT: devirtualized a call to _ZN1A1nEi
117 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
118 target triple = "x86_64-grtev4-linux-gnu"
120 %struct.A = type { ptr }
121 %struct.B = type { %struct.A }
122 %struct.C = type { %struct.A }
123 %struct.D = type { ptr }
125 @_ZTV1B = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !1
126 @_ZTV1C = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1C1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !2
127 @_ZTV1D = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEi] }, !type !3
129 @_ZTV1B_RV = constant { [4 x i32] } { [4 x i32] [
132 i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B1fEi to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B_RV, i32 0, i32 0, i32 2) to i64)) to i32),
133 i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A1nEi to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B_RV, i32 0, i32 0, i32 3) to i64)) to i32)
134 ] }, !type !7, !type !8
136 @_ZTV1C_RV = constant { [4 x i32] } { [4 x i32] [
139 i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C1fEi to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C_RV, i32 0, i32 0, i32 2) to i64)) to i32),
140 i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A1nEi to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C_RV, i32 0, i32 0, i32 3) to i64)) to i32)
141 ] }, !type !7, !type !9
143 @_ZTV1D_RV = constant { [3 x i32] } { [3 x i32] [
146 i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1D1mEi to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1D_RV, i32 0, i32 0, i32 2) to i64)) to i32)
149 ; CHECK-IR-LABEL: define {{(noundef )?}}i32 @test
150 define i32 @test(ptr %obj, ptr %obj2, i32 %a) {
152 %vtable = load ptr, ptr %obj
153 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A")
154 call void @llvm.assume(i1 %p)
155 %fptrptr = getelementptr ptr, ptr %vtable, i32 1
156 %fptr1 = load ptr, ptr %fptrptr, align 8
158 ; Check that the call was devirtualized.
159 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi
160 ; Ensure !prof and !callees metadata for indirect call promotion removed.
162 ; CHECK-IR-NOT: callees
163 %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a), !prof !5, !callees !6
165 %fptr22 = load ptr, ptr %vtable, align 8
167 ; We still have to call it as virtual.
168 ; CHECK-IR: %call3 = tail call i32 %fptr22
169 %call3 = tail call i32 %fptr22(ptr nonnull %obj, i32 %call)
171 %vtable2 = load ptr, ptr %obj2
172 %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !4)
173 call void @llvm.assume(i1 %p2)
175 %fptr33 = load ptr, ptr %vtable2, align 8
177 ; Check that the call was devirtualized.
178 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi
179 %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %call3)
182 ; CHECK-IR-LABEL: ret i32
185 declare ptr @llvm.load.relative.i32(ptr, i32)
187 ; CHECK-IR-LABEL: define {{.*}}i32 @test_rv
188 define i32 @test_rv(ptr %obj, ptr %obj2, i32 %a) {
190 %vtable = load ptr, ptr %obj
191 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A_RV")
192 call void @llvm.assume(i1 %p)
193 %fptr1_rv = call ptr @llvm.load.relative.i32(ptr %vtable, i32 4)
195 ; Check that the call was devirtualized.
196 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi
197 ; Ensure !prof and !callees metadata for indirect call promotion removed.
199 ; CHECK-IR-NOT: callees
200 %call = tail call i32 %fptr1_rv(ptr nonnull %obj, i32 %a), !prof !5, !callees !6
202 %fptr22_rv = call ptr @llvm.load.relative.i32(ptr %vtable, i32 0)
204 ; We still have to call it as virtual.
205 ; CHECK-IR: %call3 = tail call i32 %fptr22
206 %call3 = tail call i32 %fptr22_rv(ptr nonnull %obj, i32 %call)
208 %vtable2 = load ptr, ptr %obj2
209 %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !11)
210 call void @llvm.assume(i1 %p2)
212 %fptr33_rv = call ptr @llvm.load.relative.i32(ptr %vtable2, i32 0)
214 ; Check that the call was devirtualized.
215 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi
216 %call4 = tail call i32 %fptr33_rv(ptr nonnull %obj2, i32 %call3)
219 ; CHECK-IR-LABEL: ret i32
222 declare i1 @llvm.type.test(ptr, metadata)
223 declare void @llvm.assume(i1)
225 define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 {
229 define i32 @_ZN1A1nEi(ptr %this, i32 %a) #0 {
233 define i32 @_ZN1C1fEi(ptr %this, i32 %a) #0 {
237 define i32 @_ZN1D1mEi(ptr %this, i32 %a) #0 {
241 ; Make sure we don't inline or otherwise optimize out the direct calls.
242 attributes #0 = { noinline optnone }
244 !0 = !{i64 16, !"_ZTS1A"}
245 !1 = !{i64 16, !"_ZTS1B"}
246 !2 = !{i64 16, !"_ZTS1C"}
249 !5 = !{!"VP", i32 0, i64 1, i64 1621563287929432257, i64 1}
250 !6 = !{ptr @_ZN1A1nEi}
252 !7 = !{i64 8, !"_ZTS1A_RV"}
253 !8 = !{i64 8, !"_ZTS1B_RV"}
254 !9 = !{i64 8, !"_ZTS1C_RV"}