1; REQUIRES: x86-registered-target 2 3;; Ensure we don't incorrectly devirtualization when one vtable contains an 4;; alias (i.e. ensure analysis does not improperly ignore this implementation). 5 6;; Test pure ThinLTO 7 8;; Generate unsplit module with summary for ThinLTO index-based WPD. 9; RUN: opt -thinlto-bc -o %t1.o %s 10 11;; Check that we have properly recorded the alias in the vtable summary. 12; RUN: llvm-dis -o - %t1.o | FileCheck %s --check-prefix SUMMARY 13; SUMMARY: gv: (name: "_ZTV1D", {{.*}} vTableFuncs: ((virtFunc: ^[[ALIAS:([0-9]+)]], offset: 16)) 14; SUMMARY: ^[[ALIAS]] = gv: (name: "_ZN1D1mEiAlias" 15 16; RUN: llvm-lto2 run %t1.o -save-temps -pass-remarks=. \ 17; RUN: -whole-program-visibility \ 18; RUN: -wholeprogramdevirt-print-index-based \ 19; RUN: -o %t2 \ 20; RUN: -r=%t1.o,test,px \ 21; RUN: -r=%t1.o,_ZTV1D,px \ 22; RUN: -r=%t1.o,_ZN1D1mEi,px \ 23; RUN: -r=%t1.o,_ZN1D1mEiAlias,px \ 24; RUN: -r=%t1.o,_ZTV1B,px \ 25; RUN: -r=%t1.o,_ZN1B1mEi,px \ 26; RUN: 2>&1 | FileCheck %s --implicit-check-not {{[Dd]}}evirtualized --allow-empty 27; RUN: llvm-dis %t2.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 28 29;; Test hybrid Thin/Regular LTO 30 31;; Generate split module with summary for hybrid Thin/Regular LTO WPD. 32; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t3.o %s 33 34; RUN: llvm-lto2 run %t3.o -save-temps -pass-remarks=. \ 35; RUN: -whole-program-visibility \ 36; RUN: -o %t4 \ 37; RUN: -r=%t3.o,test,px \ 38; RUN: -r=%t3.o,_ZTV1D, \ 39; RUN: -r=%t3.o,_ZTV1D,px \ 40; RUN: -r=%t3.o,_ZN1D1mEi,px \ 41; RUN: -r=%t3.o,_ZN1D1mEiAlias,px \ 42; RUN: -r=%t3.o,_ZN1D1mEiAlias, \ 43; RUN: -r=%t3.o,_ZTV1B, \ 44; RUN: -r=%t3.o,_ZTV1B,px \ 45; RUN: -r=%t3.o,_ZN1B1mEi,px \ 46; RUN: -r=%t3.o,_ZN1B1mEi, \ 47; RUN: 2>&1 | FileCheck %s --implicit-check-not {{[Dd]}}evirtualized --allow-empty 48; RUN: llvm-dis %t4.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 49 50;; Test Regular LTO 51 52; RUN: opt -o %t5.o %s 53; RUN: llvm-lto2 run %t5.o -save-temps -pass-remarks=. \ 54; RUN: -whole-program-visibility \ 55; RUN: -o %t6 \ 56; RUN: -r=%t5.o,test,px \ 57; RUN: -r=%t5.o,_ZTV1D,px \ 58; RUN: -r=%t5.o,_ZN1D1mEi,px \ 59; RUN: -r=%t5.o,_ZN1D1mEiAlias,px \ 60; RUN: -r=%t5.o,_ZTV1B,px \ 61; RUN: -r=%t5.o,_ZN1B1mEi,px \ 62; RUN: 2>&1 | FileCheck %s --implicit-check-not {{[Dd]}}evirtualized --allow-empty 63; RUN: llvm-dis %t6.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 64 65target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 66target triple = "x86_64-grtev4-linux-gnu" 67 68%struct.D = type { ptr } 69%struct.B = type { %struct.D } 70 71@_ZTV1D = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEiAlias] }, !type !0 72@_ZTV1B = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1B1mEi] }, !type !0, !type !1 73 74 75define i32 @_ZN1D1mEi(ptr %this, i32 %a) { 76 ret i32 0; 77} 78 79@_ZN1D1mEiAlias = unnamed_addr alias i32 (ptr, i32), ptr @_ZN1D1mEi 80 81define i32 @_ZN1B1mEi(ptr %this, i32 %a) { 82 ret i32 0; 83} 84 85; CHECK-IR-LABEL: define i32 @test 86define i32 @test(ptr %obj2, i32 %a) { 87entry: 88 %vtable2 = load ptr, ptr %obj2 89 %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !"_ZTS1D") 90 call void @llvm.assume(i1 %p2) 91 92 %fptr33 = load ptr, ptr %vtable2, align 8 93 94 ;; Confirm the call was not devirtualized. 95 ;; CHECK-IR: %call4 = tail call i32 %fptr33 96 %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %a) 97 ret i32 %call4 98} 99; CHECK-IR-LABEL: ret i32 100; CHECK-IR-LABEL: } 101 102declare i1 @llvm.type.test(ptr, metadata) 103declare void @llvm.assume(i1) 104 105!0 = !{i64 16, !"_ZTS1D"} 106!1 = !{i64 16, !"_ZTS1B"} 107