| ; REQUIRES: x86-registered-target |
| |
| ; Test that index-based devirtualization in the presence of external |
| ; vtables with the same name (with comdat) succeeds. |
| |
| ; Generate unsplit module with summary for ThinLTO index-based WPD. |
| ; RUN: opt -thinlto-bc -o %t3.o %s |
| ; RUN: opt -thinlto-bc -o %t4.o %p/Inputs/devirt_external_comdat_same_guid.ll |
| |
| ; RUN: llvm-lto2 run %t3.o %t4.o -save-temps -use-new-pm -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -wholeprogramdevirt-print-index-based \ |
| ; RUN: -o %t5 \ |
| ; RUN: -r=%t3.o,use_B,px \ |
| ; RUN: -r=%t3.o,test,px \ |
| ; RUN: -r=%t3.o,_ZTV1B,px \ |
| ; RUN: -r=%t3.o,_ZN1B1fEi,px \ |
| ; RUN: -r=%t3.o,_ZN1B1nEi,px \ |
| ; RUN: -r=%t4.o,_ZTV1B,x \ |
| ; RUN: -r=%t4.o,_ZN1B1fEi,x \ |
| ; RUN: -r=%t4.o,_ZN1A1nEi,x \ |
| ; RUN: -r=%t4.o,test2,px \ |
| ; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK --check-prefix=PRINT |
| ; RUN: llvm-dis %t5.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR1 |
| ; RUN: llvm-dis %t5.2.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR2 |
| |
| ; PRINT-DAG: Devirtualized call to {{.*}} (_ZN1A1nEi) |
| |
| ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi |
| |
| 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" |
| |
| source_filename = "-" |
| |
| %struct.A = type { i32 (...)** } |
| %struct.B = type { %struct.A } |
| |
| $_ZTV1B = comdat any |
| |
| @_ZTV1B = constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.B*, i32)* @_ZN1B1fEi to i8*), i8* bitcast (i32 (%struct.B*, i32)* @_ZN1B1nEi to i8*)] }, comdat, !type !0, !type !1 |
| |
| define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 comdat($_ZTV1B) { |
| ret i32 0; |
| } |
| |
| define i32 @_ZN1B1nEi(%struct.B* %this, i32 %a) #0 comdat($_ZTV1B) { |
| ret i32 0; |
| } |
| |
| ; Ensures that vtable of B is live so that we will attempt devirt. |
| define dso_local i32 @use_B(%struct.B* %a) { |
| entry: |
| %0 = bitcast %struct.B* %a to i32 (...)*** |
| store i32 (...)** bitcast (i8** getelementptr inbounds ({ [4 x i8*] }, { [4 x i8*] }* @_ZTV1B, i64 0, inrange i32 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 8 |
| ret i32 0 |
| } |
| |
| ; CHECK-IR1: define i32 @test( |
| define i32 @test(%struct.A* %obj, i32 %a) { |
| entry: |
| %0 = bitcast %struct.A* %obj to i8*** |
| %vtable = load i8**, i8*** %0 |
| %1 = bitcast i8** %vtable to i8* |
| %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A") |
| call void @llvm.assume(i1 %p) |
| %fptrptr = getelementptr i8*, i8** %vtable, i32 1 |
| %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)** |
| %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8 |
| |
| ; Check that the call was devirtualized. |
| ; CHECK-IR1: tail call i32 {{.*}}@_ZN1A1nEi |
| %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a) |
| |
| ret i32 %call |
| } |
| |
| ; CHECK-IR2: define i32 @test2 |
| ; Check that the call was devirtualized. |
| ; CHECK-IR2: tail call i32 @_ZN1A1nEi |
| |
| declare i1 @llvm.type.test(i8*, metadata) |
| declare void @llvm.assume(i1) |
| |
| attributes #0 = { noinline optnone } |
| |
| !0 = !{i64 16, !"_ZTS1A"} |
| !1 = !{i64 16, !"_ZTS1B"} |