target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-grtev4-linux-gnu" %struct.A = type { ptr } %struct.B = type { ptr } @_ZTV1B = linkonce_odr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1B1nEi] }, !type !0 $test = comdat any $testb = comdat any define linkonce_odr i32 @test(ptr %obj, i32 %a) comdat { entry: %vtable5 = load ptr, ptr %obj %0 = tail call { ptr, i1 } @llvm.type.checked.load(ptr %vtable5, i32 8, metadata !"_ZTS1A") %1 = extractvalue { ptr, i1 } %0, 1 br i1 %1, label %cont, label %trap trap: tail call void @llvm.trap() unreachable cont: %2 = extractvalue { ptr, i1 } %0, 0 %call = tail call i32 %2(ptr nonnull %obj, i32 %a) ret i32 %call } define linkonce_odr i32 @testb(ptr %obj, i32 %a) comdat { entry: %vtable5 = load ptr, ptr %obj %0 = tail call { ptr, i1 } @llvm.type.checked.load(ptr %vtable5, i32 0, metadata !"_ZTS1A") %1 = extractvalue { ptr, i1 } %0, 1 br i1 %1, label %cont, label %trap trap: tail call void @llvm.trap() unreachable cont: %2 = extractvalue { ptr, i1 } %0, 0 %call = tail call i32 %2(ptr nonnull %obj, i32 %a) ret i32 %call } declare { ptr, i1 } @llvm.type.checked.load(ptr, i32, metadata) declare void @llvm.trap() define internal i32 @_ZN1B1fEi(ptr %this, i32 %a) { entry: ret i32 0 } define internal i32 @_ZN1B1nEi(ptr %this, i32 %a) { entry: ret i32 0 } !0 = !{i64 16, !"_ZTS1B"}