forked from OSchip/llvm-project
115 lines
5.4 KiB
LLVM
115 lines
5.4 KiB
LLVM
; REQUIRES: x86
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;; Test that that a vtable defined locally in one module but external in another
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;; does not prevent devirtualization.
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;; Hybrid WPD
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; RUN: split-file %s %t
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; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t/Cat.o %t/Cat.ll
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; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t/User.o %t/User.ll
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; RUN: echo '{ global: _Z17useDoThingWithCatv; local: *; };' > %t/version.exp
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; RUN: ld.lld %t/Cat.o %t/User.o -shared -o %t/libA.so -save-temps --lto-whole-program-visibility \
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; RUN: -mllvm -pass-remarks=. --version-script %t/version.exp 2>&1 | \
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; RUN: FileCheck %s --check-prefix=REMARK
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; REMARK-DAG: <unknown>:0:0: single-impl: devirtualized a call to _ZNK3Cat9makeNoiseEv
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; REMARK-DAG: <unknown>:0:0: single-impl: devirtualized a call to _ZNK3Cat9makeNoiseEv
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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;--- Cat.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.Cat = type { %struct.Animal }
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%struct.Animal = type { i32 (...)** }
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$_ZTS6Animal = comdat any
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$_ZTI6Animal = comdat any
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@.str = private unnamed_addr constant [5 x i8] c"Meow\00", align 1
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@_ZTV3Cat = dso_local unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8*, i8* }* @_ZTI3Cat to i8*), i8* bitcast (void (%struct.Cat*)* @_ZNK3Cat9makeNoiseEv to i8*)] }, align 8, !type !0, !type !1, !type !2, !type !3
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@_ZTVN10__cxxabiv120__si_class_type_infoE = external dso_local global i8*
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@_ZTS3Cat = dso_local constant [5 x i8] c"3Cat\00", align 1
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@_ZTVN10__cxxabiv117__class_type_infoE = external dso_local global i8*
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@_ZTS6Animal = linkonce_odr dso_local constant [8 x i8] c"6Animal\00", comdat, align 1
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@_ZTI6Animal = linkonce_odr dso_local constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @_ZTS6Animal, i32 0, i32 0) }, comdat, align 8
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@_ZTI3Cat = dso_local constant { i8*, i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv120__si_class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @_ZTS3Cat, i32 0, i32 0), i8* bitcast ({ i8*, i8* }* @_ZTI6Animal to i8*) }, align 8
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define dso_local void @_ZNK3Cat9makeNoiseEv(%struct.Cat* nocapture nonnull readnone dereferenceable(8) %this) unnamed_addr align 2 {
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entry:
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%call = tail call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
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ret void
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}
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declare dso_local noundef i32 @puts(i8* nocapture noundef readonly) local_unnamed_addr
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define dso_local void @_Z14doThingWithCatP6Animal(%struct.Animal* %a) local_unnamed_addr {
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entry:
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%tobool.not = icmp eq %struct.Animal* %a, null
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br i1 %tobool.not, label %if.end, label %if.then
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if.then: ; preds = %entry
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%0 = bitcast %struct.Animal* %a to %struct.Cat*
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%1 = bitcast %struct.Animal* %a to void (%struct.Cat*)***
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%vtable = load void (%struct.Cat*)**, void (%struct.Cat*)*** %1, align 8, !tbaa !4
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%2 = bitcast void (%struct.Cat*)** %vtable to i8*
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%3 = tail call i1 @llvm.type.test(i8* %2, metadata !"_ZTS3Cat")
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tail call void @llvm.assume(i1 %3)
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%4 = load void (%struct.Cat*)*, void (%struct.Cat*)** %vtable, align 8
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tail call void %4(%struct.Cat* nonnull dereferenceable(8) %0)
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br label %if.end
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if.end: ; preds = %if.then, %entry
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ret void
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}
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declare i1 @llvm.type.test(i8*, metadata)
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declare void @llvm.assume(i1 noundef)
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!0 = !{i64 16, !"_ZTS3Cat"}
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!1 = !{i64 16, !"_ZTSM3CatKFvvE.virtual"}
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!2 = !{i64 16, !"_ZTS6Animal"}
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!3 = !{i64 16, !"_ZTSM6AnimalKFvvE.virtual"}
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!4 = !{!5, !5, i64 0}
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!5 = !{!"vtable pointer", !6, i64 0}
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!6 = !{!"Simple C++ TBAA"}
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;--- User.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.Animal = type { i32 (...)** }
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%struct.Cat = type { %struct.Animal }
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@_ZTV3Cat = available_externally dso_local unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* bitcast (i8** @_ZTI3Cat to i8*), i8* bitcast (void (%struct.Cat*)* @_ZNK3Cat9makeNoiseEv to i8*)] }, align 8, !type !0, !type !1, !type !2, !type !3
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@_ZTI3Cat = external dso_local constant i8*
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@llvm.compiler.used = appending global [1 x i8*] [i8* bitcast ({ [3 x i8*] }* @_ZTV3Cat to i8*)], section "llvm.metadata"
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declare dso_local void @_ZNK3Cat9makeNoiseEv(%struct.Cat* nonnull dereferenceable(8)) unnamed_addr
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define dso_local void @_Z17useDoThingWithCatv() local_unnamed_addr {
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entry:
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%call = tail call noalias nonnull dereferenceable(8) i8* @_Znwm(i64 8)
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%0 = bitcast i8* %call to i32 (...)***
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store i32 (...)** bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTV3Cat, i64 0, inrange i32 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 8, !tbaa !4
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%1 = bitcast i8* %call to %struct.Animal*
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tail call void @_Z14doThingWithCatP6Animal(%struct.Animal* nonnull %1)
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ret void
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}
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declare dso_local nonnull i8* @_Znwm(i64) local_unnamed_addr
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declare dso_local void @_Z14doThingWithCatP6Animal(%struct.Animal*) local_unnamed_addr
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!0 = !{i64 16, !"_ZTS3Cat"}
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!1 = !{i64 16, !"_ZTSM3CatKFvvE.virtual"}
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!2 = !{i64 16, !"_ZTS6Animal"}
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!3 = !{i64 16, !"_ZTSM6AnimalKFvvE.virtual"}
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!4 = !{!5, !5, i64 0}
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!5 = !{!"vtable pointer", !6, i64 0}
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!6 = !{!"Simple C++ TBAA"}
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