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1; REQUIRES: x862; RUN: rm -rf %t; split-file %s %t3 4;; Split-LTO bitcode files can have the same symbol (typeinfo) twice in the5;; symbol table: First undefined in the main file, then defined in the index6;; file.7;; When used in --start-lib / --end-lib, ld64.lld creates lazy symbols8;; for all non-undefined symbols in the bitcode file.9;; In vtable.o below, the typeinfo __ZTI1S is present once as undefined and10;; once as defined. The defined version is added as a added as a LazyObject11;; symbol.12;; When vtable.o gets loaded due to the __ZN1SC1Ev ref from vtable_use.o,13;; the first __ZTI1S (undefined) used to cause vtable.o to be extracted14;; a second time, which used to cause an assert.15;; See PR59162 for details.16 17; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t/vtable.o %t/vtable.ll18; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t/vtable_use.o %t/vtable_use.ll19 20; RUN: %lld -lc++ --start-lib %t/vtable.o --end-lib %t/vtable_use.o -o /dev/null21 22;; Bitcode files created by:23; % cat vtable.cc24; struct S {25; S();26; virtual void f();27; };28; S::S() {}29; void S::f() {}30 31; % cat vtable_use.cc32; struct S {33; S();34; virtual void f();35; };36; int main() { S s; }37 38; % clang -c vtable_use.cc vtable.cc -emit-llvm -S -fno-exceptions -arch x86_64 -mmacos-version-min=11 -O139 40; ...and then manually adding `, !type !8, type !9` based on `clang -S -emit-llvm -flto=thin` output,41; because splitAndWriteThinLTOBitcode() in ThinLTOBitcodeWriter.cpp only splits bitcode42; if type annotations are present. While at it, also removed unnecessary metadata.43; (NB: The first comment creates vtable.ll while the latter generates vtable.s! vtable.s44; contains a few things opt complains about, so we can't use the output of that directly.)45 46;--- vtable.ll47; ModuleID = 'vtable.cc'48source_filename = "vtable.cc"49target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"50target triple = "x86_64-apple-macosx11.0.0"51 52@_ZTV1S = unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI1S, ptr @_ZN1S1fEv] }, align 853@_ZTVN10__cxxabiv117__class_type_infoE = external global ptr54@_ZTS1S = constant [3 x i8] c"1S\00", align 155@_ZTI1S = constant { ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv117__class_type_infoE, i64 2), ptr @_ZTS1S }, align 8, !type !0, !type !156 57; Function Attrs: mustprogress nofree norecurse nosync nounwind ssp willreturn memory(argmem: write) uwtable58define void @_ZN1SC2Ev(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(8) %this) unnamed_addr align 2 {59entry:60 store ptr getelementptr inbounds inrange(-16, 8) ({ [3 x ptr] }, ptr @_ZTV1S, i64 0, i32 0, i64 2), ptr %this, align 861 ret void62}63 64; Function Attrs: mustprogress nofree norecurse nosync nounwind ssp willreturn memory(argmem: write) uwtable65define void @_ZN1SC1Ev(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(8) %this) unnamed_addr align 2 {66entry:67 store ptr getelementptr inbounds inrange(-16, 8) ({ [3 x ptr] }, ptr @_ZTV1S, i64 0, i32 0, i64 2), ptr %this, align 868 ret void69}70 71; Function Attrs: mustprogress nofree norecurse nosync nounwind ssp willreturn memory(none) uwtable72define void @_ZN1S1fEv(ptr nocapture nonnull align 8 %this) unnamed_addr align 2 {73entry:74 ret void75}76 77!0 = !{i64 16, !"_ZTS1S"}78!1 = !{i64 16, !"_ZTSM1SFvvE.virtual"}79 80;--- vtable_use.ll81; ModuleID = 'vtable_use.cc'82source_filename = "vtable_use.cc"83target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"84target triple = "x86_64-apple-macosx11.0.0"85 86%struct.S = type { ptr }87 88; Function Attrs: mustprogress noinline norecurse nounwind optnone ssp uwtable89define noundef i32 @main() {90entry:91 %s = alloca %struct.S, align 892 call void @_ZN1SC1Ev(ptr noundef nonnull align 8 dereferenceable(8) %s)93 ret i32 094}95 96declare void @_ZN1SC1Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr97