2 ;; Test that that a vtable defined locally in one module but external in another
3 ;; does not prevent devirtualization.
6 ; RUN: split-file %s %t
7 ; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t/Cat.o %t/Cat.ll
8 ; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t/User.o %t/User.ll
9 ; RUN: echo '{ global: _Z17useDoThingWithCatv; local: *; };' > %t/version.exp
11 ; RUN: ld.lld %t/Cat.o %t/User.o -shared -o %t/libA.so -save-temps --lto-whole-program-visibility \
12 ; RUN: -mllvm -pass-remarks=. --version-script %t/version.exp 2>&1 | \
13 ; RUN: FileCheck %s --check-prefix=REMARK
15 ; REMARK-DAG: <unknown>:0:0: single-impl: devirtualized a call to _ZNK3Cat9makeNoiseEv
16 ; REMARK-DAG: <unknown>:0:0: single-impl: devirtualized a call to _ZNK3Cat9makeNoiseEv
18 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
19 target triple = "x86_64-unknown-linux-gnu"
22 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
23 target triple = "x86_64-unknown-linux-gnu"
25 %struct.Cat = type { %struct.Animal }
26 %struct.Animal = type { ptr }
28 $_ZTS6Animal = comdat any
30 $_ZTI6Animal = comdat any
32 @.str = private unnamed_addr constant [5 x i8] c"Meow\00", align 1
33 @_ZTV3Cat = dso_local unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI3Cat, ptr @_ZNK3Cat9makeNoiseEv] }, align 8, !type !0, !type !1, !type !2, !type !3
34 @_ZTVN10__cxxabiv120__si_class_type_infoE = external dso_local global ptr
35 @_ZTS3Cat = dso_local constant [5 x i8] c"3Cat\00", align 1
36 @_ZTVN10__cxxabiv117__class_type_infoE = external dso_local global ptr
37 @_ZTS6Animal = linkonce_odr dso_local constant [8 x i8] c"6Animal\00", comdat, align 1
38 @_ZTI6Animal = linkonce_odr dso_local constant { ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv117__class_type_infoE, i64 2), ptr @_ZTS6Animal }, comdat, align 8
39 @_ZTI3Cat = dso_local constant { ptr, ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv120__si_class_type_infoE, i64 2), ptr @_ZTS3Cat, ptr @_ZTI6Animal }, align 8
41 define dso_local void @_ZNK3Cat9makeNoiseEv(ptr nocapture nonnull readnone dereferenceable(8) %this) unnamed_addr align 2 {
43 %call = tail call i32 @puts(ptr nonnull dereferenceable(1) @.str)
47 declare dso_local noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr
49 define dso_local void @_Z14doThingWithCatP6Animal(ptr %a) local_unnamed_addr {
51 %tobool.not = icmp eq ptr %a, null
52 br i1 %tobool.not, label %if.end, label %if.then
54 if.then: ; preds = %entry
55 %vtable = load ptr, ptr %a, align 8, !tbaa !4
56 %0 = tail call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS3Cat")
57 tail call void @llvm.assume(i1 %0)
58 %1 = load ptr, ptr %vtable, align 8
59 tail call void %1(ptr nonnull dereferenceable(8) %a)
62 if.end: ; preds = %if.then, %entry
66 declare i1 @llvm.type.test(ptr, metadata)
68 declare void @llvm.assume(i1 noundef)
70 !0 = !{i64 16, !"_ZTS3Cat"}
71 !1 = !{i64 16, !"_ZTSM3CatKFvvE.virtual"}
72 !2 = !{i64 16, !"_ZTS6Animal"}
73 !3 = !{i64 16, !"_ZTSM6AnimalKFvvE.virtual"}
75 !5 = !{!"vtable pointer", !6, i64 0}
76 !6 = !{!"Simple C++ TBAA"}
79 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
80 target triple = "x86_64-unknown-linux-gnu"
82 %struct.Animal = type { ptr }
83 %struct.Cat = type { %struct.Animal }
85 @_ZTV3Cat = available_externally dso_local unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI3Cat, ptr @_ZNK3Cat9makeNoiseEv] }, align 8, !type !0, !type !1, !type !2, !type !3
86 @_ZTI3Cat = external dso_local constant ptr
87 @llvm.compiler.used = appending global [1 x ptr] [ptr @_ZTV3Cat], section "llvm.metadata"
89 declare dso_local void @_ZNK3Cat9makeNoiseEv(ptr nonnull dereferenceable(8)) unnamed_addr
91 define dso_local void @_Z17useDoThingWithCatv() local_unnamed_addr {
93 %call = tail call noalias nonnull dereferenceable(8) ptr @_Znwm(i64 8)
94 store ptr getelementptr inbounds inrange(-16, 8) ({ [3 x ptr] }, ptr @_ZTV3Cat, i64 0, i32 0, i64 2), ptr %call, align 8, !tbaa !4
95 tail call void @_Z14doThingWithCatP6Animal(ptr nonnull %call)
99 declare dso_local nonnull ptr @_Znwm(i64) local_unnamed_addr
101 declare dso_local void @_Z14doThingWithCatP6Animal(ptr) local_unnamed_addr
103 !0 = !{i64 16, !"_ZTS3Cat"}
104 !1 = !{i64 16, !"_ZTSM3CatKFvvE.virtual"}
105 !2 = !{i64 16, !"_ZTS6Animal"}
106 !3 = !{i64 16, !"_ZTSM6AnimalKFvvE.virtual"}
107 !4 = !{!5, !5, i64 0}
108 !5 = !{!"vtable pointer", !6, i64 0}
109 !6 = !{!"Simple C++ TBAA"}