49 lines
2.0 KiB
LLVM
49 lines
2.0 KiB
LLVM
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; RUN: opt < %s -globaldce -S | FileCheck %s
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; We currently only use llvm.type.checked.load for virtual function pointers,
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; not any other part of the vtable, so we can't remove the RTTI pointer even if
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; it's never going to be loaded from.
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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%struct.A = type { i32 (...)** }
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; CHECK: @_ZTV1A = hidden unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* null] }, align 8, !type !0, !type !1, !vcall_visibility !2
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@_ZTV1A = hidden unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast (void (%struct.A*)* @_ZN1A3fooEv to i8*)] }, align 8, !type !0, !type !1, !vcall_visibility !2
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@_ZTS1A = hidden constant [3 x i8] c"1A\00", align 1
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@_ZTI1A = hidden constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @_ZTS1A, i32 0, i32 0) }, align 8
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define internal void @_ZN1AC2Ev(%struct.A* %this) {
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entry:
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%0 = getelementptr inbounds %struct.A, %struct.A* %this, i64 0, i32 0
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store i32 (...)** bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTV1A, i64 0, inrange i32 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 8
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ret void
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}
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; CHECK-NOT: define {{.*}} @_ZN1A3fooEv(
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define internal void @_ZN1A3fooEv(%struct.A* nocapture %this) {
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entry:
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ret void
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}
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define dso_local i8* @_Z6make_Av() {
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entry:
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%call = tail call i8* @_Znwm(i64 8)
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%0 = bitcast i8* %call to %struct.A*
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tail call void @_ZN1AC2Ev(%struct.A* %0)
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ret i8* %call
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}
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declare dso_local noalias nonnull i8* @_Znwm(i64)
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@_ZTVN10__cxxabiv117__class_type_infoE = external dso_local global i8*
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!llvm.module.flags = !{!3, !4}
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!0 = !{i64 16, !"_ZTS1A"}
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!1 = !{i64 16, !"_ZTSM1AFvvE.virtual"}
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!2 = !{i64 2} ; translation-unit vcall visibility
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!3 = !{i32 1, !"LTOPostLink", i32 1}
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!4 = !{i32 1, !"Virtual Function Elim", i32 1}
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