| ; REQUIRES: x86-registered-target |
| |
| ;; Check for successful devirtualization when vtable contains an alias, |
| ;; and there is a single implementation. |
| |
| ;; Test pure ThinLTO |
| |
| ;; Generate unsplit module with summary for ThinLTO index-based WPD. |
| ; RUN: opt -thinlto-bc -o %t1.o %s |
| |
| ;; Check that we have properly recorded the alias in the vtable summary. |
| ; RUN: llvm-dis -o - %t1.o | FileCheck %s --check-prefix SUMMARY |
| ; SUMMARY: gv: (name: "_ZTV1D", {{.*}} vTableFuncs: ((virtFunc: ^[[ALIAS:([0-9]+)]], offset: 16)) |
| ; SUMMARY: ^[[ALIAS]] = gv: (name: "_ZN1D1mEiAlias" |
| |
| ; RUN: llvm-lto2 run %t1.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -wholeprogramdevirt-print-index-based \ |
| ; RUN: -o %t2 \ |
| ; RUN: -r=%t1.o,test,px \ |
| ; RUN: -r=%t1.o,_ZTV1D,px \ |
| ; RUN: -r=%t1.o,_ZN1D1mEi,px \ |
| ; RUN: -r=%t1.o,_ZN1D1mEiAlias,px \ |
| ; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK --check-prefix=PRINT |
| ; RUN: llvm-dis %t2.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR1 |
| |
| ; PRINT-DAG: Devirtualized call to {{.*}} (_ZN1D1mEiAlias) |
| ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEiAlias |
| |
| ;; Test hybrid Thin/Regular LTO |
| |
| ;; Generate split module with summary for hybrid Thin/Regular LTO WPD. |
| ; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t3.o %s |
| |
| ; RUN: llvm-lto2 run %t3.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -o %t4 \ |
| ; RUN: -r=%t3.o,test,px \ |
| ; RUN: -r=%t3.o,_ZTV1D, \ |
| ; RUN: -r=%t3.o,_ZTV1D,px \ |
| ; RUN: -r=%t3.o,_ZN1D1mEi,px \ |
| ; RUN: -r=%t3.o,_ZN1D1mEiAlias,px \ |
| ; RUN: -r=%t3.o,_ZN1D1mEiAlias, \ |
| ; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: llvm-dis %t4.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR1 |
| |
| ;; Test Regular LTO |
| ; RUN: opt -o %t5.o %s |
| ; RUN: llvm-lto2 run %t5.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -o %t6 \ |
| ; RUN: -r=%t5.o,test,px \ |
| ; RUN: -r=%t5.o,_ZTV1D,px \ |
| ; RUN: -r=%t5.o,_ZN1D1mEi,px \ |
| ; RUN: -r=%t5.o,_ZN1D1mEiAlias,px \ |
| ; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: llvm-dis %t6.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR1 |
| |
| 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 { ptr } |
| |
| @_ZTV1D = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEiAlias] }, !type !3 |
| |
| define i32 @_ZN1D1mEi(ptr %this, i32 %a) { |
| ret i32 0; |
| } |
| |
| @_ZN1D1mEiAlias = unnamed_addr alias i32 (ptr, i32), ptr @_ZN1D1mEi |
| |
| ; CHECK-IR1-LABEL: define i32 @test |
| define i32 @test(ptr %obj2, i32 %a) { |
| entry: |
| %vtable2 = load ptr, ptr %obj2 |
| %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !"_ZTS1D") |
| call void @llvm.assume(i1 %p2) |
| |
| %fptr33 = load ptr, ptr %vtable2, align 8 |
| |
| ;; Check that the call was devirtualized. |
| ;; CHECK-IR1: %call4 = tail call i32 @_ZN1D1mEi |
| %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %a) |
| ret i32 %call4 |
| } |
| ; CHECK-IR1-LABEL: ret i32 |
| ; CHECK-IR1-LABEL: } |
| |
| declare i1 @llvm.type.test(ptr, metadata) |
| declare void @llvm.assume(i1) |
| |
| !3 = !{i64 16, !"_ZTS1D"} |