1; REQUIRES: x86-registered-target 2 3; Test devirtualization through the thin link and backend, when vtables 4; have vcall_visibility metadata with public visibility. 5 6; Index based WPD 7; Generate unsplit module with summary for ThinLTO index-based WPD. 8; RUN: opt -thinlto-bc -o %t2.o %s 9; RUN: llvm-lto2 run %t2.o -save-temps -use-new-pm -pass-remarks=. \ 10; RUN: -o %t3 \ 11; RUN: -r=%t2.o,test,px \ 12; RUN: -r=%t2.o,_ZN1A1nEi,p \ 13; RUN: -r=%t2.o,_ZN1B1fEi,p \ 14; RUN: -r=%t2.o,_ZN1C1fEi,p \ 15; RUN: -r=%t2.o,_ZN1D1mEi,p \ 16; RUN: -r=%t2.o,_ZTV1B,px \ 17; RUN: -r=%t2.o,_ZTV1C,px \ 18; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK 19; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 20 21; Hybrid WPD 22; Generate split module with summary for hybrid Thin/Regular LTO WPD. 23; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s 24; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436. 25; RUN: llvm-lto2 run %t.o -save-temps -use-new-pm -pass-remarks=. \ 26; RUN: -verify-machineinstrs=0 \ 27; RUN: -o %t3 \ 28; RUN: -r=%t.o,test,px \ 29; RUN: -r=%t.o,_ZN1A1nEi,p \ 30; RUN: -r=%t.o,_ZN1B1fEi,p \ 31; RUN: -r=%t.o,_ZN1C1fEi,p \ 32; RUN: -r=%t.o,_ZN1D1mEi,p \ 33; RUN: -r=%t.o,_ZTV1B, \ 34; RUN: -r=%t.o,_ZTV1C, \ 35; RUN: -r=%t.o,_ZTV1D, \ 36; RUN: -r=%t.o,_ZN1A1nEi, \ 37; RUN: -r=%t.o,_ZN1B1fEi, \ 38; RUN: -r=%t.o,_ZN1C1fEi, \ 39; RUN: -r=%t.o,_ZN1D1mEi, \ 40; RUN: -r=%t.o,_ZTV1B,px \ 41; RUN: -r=%t.o,_ZTV1C,px \ 42; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail 43; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 44 45; Regular LTO WPD 46; RUN: opt -o %t4.o %s 47; RUN: llvm-lto2 run %t4.o -save-temps -use-new-pm -pass-remarks=. \ 48; RUN: -whole-program-visibility \ 49; RUN: -o %t5 \ 50; RUN: -r=%t4.o,test,px \ 51; RUN: -r=%t4.o,_ZN1A1nEi,p \ 52; RUN: -r=%t4.o,_ZN1B1fEi,p \ 53; RUN: -r=%t4.o,_ZN1C1fEi,p \ 54; RUN: -r=%t4.o,_ZN1D1mEi,p \ 55; RUN: -r=%t4.o,_ZTV1B,px \ 56; RUN: -r=%t4.o,_ZTV1C,px \ 57; RUN: -r=%t4.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK 58; RUN: llvm-dis %t5.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 59 60; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi 61; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi 62 63target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 64target triple = "x86_64-grtev4-linux-gnu" 65 66%struct.A = type { i32 (...)** } 67%struct.B = type { %struct.A } 68%struct.C = type { %struct.A } 69%struct.D = type { i32 (...)** } 70 71@_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.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !type !1, !vcall_visibility !5 72@_ZTV1C = constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.C*, i32)* @_ZN1C1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !type !2, !vcall_visibility !5 73@_ZTV1D = constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3, !vcall_visibility !5 74 75 76; CHECK-IR-LABEL: define i32 @test 77define i32 @test(%struct.A* %obj, %struct.D* %obj2, i32 %a) { 78entry: 79 %0 = bitcast %struct.A* %obj to i8*** 80 %vtable = load i8**, i8*** %0 81 %1 = bitcast i8** %vtable to i8* 82 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A") 83 call void @llvm.assume(i1 %p) 84 %fptrptr = getelementptr i8*, i8** %vtable, i32 1 85 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)** 86 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8 87 88 ; Check that the call was devirtualized. 89 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi 90 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a) 91 92 %3 = bitcast i8** %vtable to i32 (%struct.A*, i32)** 93 %fptr22 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %3, align 8 94 95 ; We still have to call it as virtual. 96 ; CHECK-IR: %call3 = tail call i32 %fptr22 97 %call3 = tail call i32 %fptr22(%struct.A* nonnull %obj, i32 %call) 98 99 %4 = bitcast %struct.D* %obj2 to i8*** 100 %vtable2 = load i8**, i8*** %4 101 %5 = bitcast i8** %vtable2 to i8* 102 %p2 = call i1 @llvm.type.test(i8* %5, metadata !4) 103 call void @llvm.assume(i1 %p2) 104 105 %6 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)** 106 %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %6, align 8 107 108 ; Check that the call was devirtualized. 109 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi 110 %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %call3) 111 ret i32 %call4 112} 113; CHECK-IR-LABEL: ret i32 114; CHECK-IR-LABEL: } 115 116declare i1 @llvm.type.test(i8*, metadata) 117declare void @llvm.assume(i1) 118 119define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 { 120 ret i32 0; 121} 122 123define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 { 124 ret i32 0; 125} 126 127define i32 @_ZN1C1fEi(%struct.C* %this, i32 %a) #0 { 128 ret i32 0; 129} 130 131define i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) #0 { 132 ret i32 0; 133} 134 135; Make sure we don't inline or otherwise optimize out the direct calls. 136attributes #0 = { noinline optnone } 137 138!0 = !{i64 16, !"_ZTS1A"} 139!1 = !{i64 16, !"_ZTS1B"} 140!2 = !{i64 16, !"_ZTS1C"} 141!3 = !{i64 16, !4} 142!4 = distinct !{} 143!5 = !{i64 1} 144