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1; REQUIRES: x86-registered-target2 3; Test that index-based devirtualization in the presence of external4; vtables with the same name (with comdat) succeeds.5 6; Generate unsplit module with summary for ThinLTO index-based WPD.7; RUN: opt -thinlto-bc -o %t3.o %s8; RUN: opt -thinlto-bc -o %t4.o %p/Inputs/devirt_external_comdat_same_guid.ll9 10; RUN: llvm-lto2 run %t3.o %t4.o -save-temps -pass-remarks=. \11; RUN: -whole-program-visibility \12; RUN: -wholeprogramdevirt-print-index-based \13; RUN: -o %t5 \14; RUN: -r=%t3.o,use_B,px \15; RUN: -r=%t3.o,test,px \16; RUN: -r=%t3.o,_ZTV1B,px \17; RUN: -r=%t3.o,_ZN1B1fEi,px \18; RUN: -r=%t3.o,_ZN1B1nEi,px \19; RUN: -r=%t4.o,_ZTV1B,x \20; RUN: -r=%t4.o,_ZN1B1fEi,x \21; RUN: -r=%t4.o,_ZN1A1nEi,x \22; RUN: -r=%t4.o,test2,px \23; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK --check-prefix=PRINT24; RUN: llvm-dis %t5.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR125; RUN: llvm-dis %t5.2.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR226 27; PRINT-DAG: Devirtualized call to {{.*}} (_ZN1B1nEi)28 29; REMARK-DAG: single-impl: devirtualized a call to _ZN1B1nEi30 31target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"32target triple = "x86_64-grtev4-linux-gnu"33 34source_filename = "-"35 36%struct.A = type { ptr }37%struct.B = type { %struct.A }38 39$_ZTV1B = comdat any40 41@_ZTV1B = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1B1nEi] }, comdat, !type !0, !type !142 43define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 comdat($_ZTV1B) {44 ret i32 0;45}46 47define i32 @_ZN1B1nEi(ptr %this, i32 %a) #0 comdat($_ZTV1B) {48 ret i32 0;49}50 51; Ensures that vtable of B is live so that we will attempt devirt.52define dso_local i32 @use_B(ptr %a) {53entry:54 store ptr getelementptr inbounds ({ [4 x ptr] }, ptr @_ZTV1B, i64 0, i32 0, i64 2), ptr %a, align 855 ret i32 056}57 58; CHECK-IR1: define noundef i32 @test(59define i32 @test(ptr %obj, i32 %a) {60entry:61 %vtable = load ptr, ptr %obj62 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A")63 call void @llvm.assume(i1 %p)64 %fptrptr = getelementptr ptr, ptr %vtable, i32 165 %fptr1 = load ptr, ptr %fptrptr, align 866 67 ; Check that the call was devirtualized.68 ; CHECK-IR1: tail call i32 {{.*}}@_ZN1B1nEi69 %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a)70 71 ret i32 %call72}73 74; CHECK-IR2: define i32 @test275; Check that the call was devirtualized.76; CHECK-IR2: tail call i32 @_ZN1B1nEi77 78declare i1 @llvm.type.test(ptr, metadata)79declare void @llvm.assume(i1)80 81attributes #0 = { noinline optnone }82 83!0 = !{i64 16, !"_ZTS1A"}84!1 = !{i64 16, !"_ZTS1B"}85