| ; REQUIRES: x86-registered-target |
| |
| ; Test index-based devirtualization when one copy is an alias. |
| |
| ; 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_alias.ll |
| |
| ; RUN: llvm-lto2 run %t3.o %t4.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -wholeprogramdevirt-print-index-based \ |
| ; RUN: -o %t5 \ |
| ; RUN: -r=%t3.o,test,px \ |
| ; RUN: -r=%t3.o,_ZTV1D, \ |
| ; RUN: -r=%t3.o,_ZN1D1mEi, \ |
| ; RUN: -r=%t4.o,_ZN1D1mEi,p \ |
| ; RUN: -r=%t4.o,_ZTV1D,px \ |
| ; RUN: -r=%t4.o,some_name,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 |
| |
| ; PRINT-DAG: Devirtualized call to {{.*}} (_ZN1D1mEi) |
| |
| ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi |
| |
| 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.D = type { i32 (...)** } |
| |
| @_ZTV1D = linkonce_odr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3 |
| |
| ; CHECK-IR1-LABEL: define i32 @test |
| define i32 @test(%struct.D* %obj2, i32 %a) { |
| entry: |
| %0 = bitcast %struct.D* %obj2 to i8*** |
| %vtable2 = load i8**, i8*** %0 |
| %1 = bitcast i8** %vtable2 to i8* |
| %p2 = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1D") |
| call void @llvm.assume(i1 %p2) |
| |
| %2 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)** |
| %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %2, align 8 |
| |
| ; Check that the call was devirtualized. |
| ; CHECK-IR1: %call4 = tail call i32 @_ZN1D1mEi |
| %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %a) |
| ret i32 %call4 |
| } |
| ; CHECK-IR1-LABEL: ret i32 |
| ; CHECK-IR1-LABEL: } |
| |
| declare i1 @llvm.type.test(i8*, metadata) |
| declare void @llvm.assume(i1) |
| declare i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) |
| |
| attributes #0 = { noinline optnone } |
| |
| !3 = !{i64 16, !"_ZTS1D"} |