1; REQUIRES: x86-registered-target 2 3; Test devirtualization through the thin link and backend. 4 5; Generate split module with summary for hybrid Thin/Regular LTO WPD. 6; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s 7 8; Check that we have module flag showing splitting enabled, and that we don't 9; generate summary information needed for index-based WPD. 10; RUN: llvm-modextract -b -n=0 %t.o -o %t.o.0 11; RUN: llvm-dis -o - %t.o.0 | FileCheck %s --check-prefix=ENABLESPLITFLAG --implicit-check-not=vTableFuncs --implicit-check-not=typeidCompatibleVTable 12; RUN: llvm-modextract -b -n=1 %t.o -o %t.o.1 13; RUN: llvm-dis -o - %t.o.1 | FileCheck %s --check-prefix=ENABLESPLITFLAG --implicit-check-not=vTableFuncs --implicit-check-not=typeidCompatibleVTable 14; ENABLESPLITFLAG: !{i32 1, !"EnableSplitLTOUnit", i32 1} 15 16; Generate unsplit module with summary for ThinLTO index-based WPD. 17; RUN: opt -thinlto-bc -o %t2.o %s 18 19; Check that we don't have module flag when splitting not enabled for ThinLTO, 20; and that we generate summary information needed for index-based WPD. 21; RUN: llvm-dis -o - %t2.o | FileCheck %s --check-prefix=NOENABLESPLITFLAG 22; NOENABLESPLITFLAG-DAG: !{i32 1, !"EnableSplitLTOUnit", i32 0} 23; NOENABLESPLITFLAG-DAG: [[An:\^[0-9]+]] = gv: (name: "_ZN1A1nEi" 24; NOENABLESPLITFLAG-DAG: [[Bf:\^[0-9]+]] = gv: (name: "_ZN1B1fEi" 25; NOENABLESPLITFLAG-DAG: [[Cf:\^[0-9]+]] = gv: (name: "_ZN1C1fEi" 26; NOENABLESPLITFLAG-DAG: [[Dm:\^[0-9]+]] = gv: (name: "_ZN1D1mEi" 27; NOENABLESPLITFLAG-DAG: [[B:\^[0-9]+]] = gv: (name: "_ZTV1B", {{.*}} vTableFuncs: ((virtFunc: [[Bf]], offset: 16), (virtFunc: [[An]], offset: 24)), refs: ([[Bf]], [[An]]) 28; NOENABLESPLITFLAG-DAG: [[C:\^[0-9]+]] = gv: (name: "_ZTV1C", {{.*}} vTableFuncs: ((virtFunc: [[Cf]], offset: 16), (virtFunc: [[An]], offset: 24)), refs: ([[An]], [[Cf]]) 29; NOENABLESPLITFLAG-DAG: [[D:\^[0-9]+]] = gv: (name: "_ZTV1D", {{.*}} vTableFuncs: ((virtFunc: [[Dm]], offset: 16)), refs: ([[Dm]]) 30; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1A", summary: ((offset: 16, [[B]]), (offset: 16, [[C]]))) 31; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1B", summary: ((offset: 16, [[B]]))) 32; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1C", summary: ((offset: 16, [[C]]))) 33; Type Id on _ZTV1D should have been promoted 34; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "1.{{.*}}", summary: ((offset: 16, [[D]]))) 35 36; Index based WPD 37; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \ 38; RUN: -whole-program-visibility \ 39; RUN: -o %t3 \ 40; RUN: -r=%t2.o,test,px \ 41; RUN: -r=%t2.o,_ZN1A1nEi,p \ 42; RUN: -r=%t2.o,_ZN1B1fEi,p \ 43; RUN: -r=%t2.o,_ZN1C1fEi,p \ 44; RUN: -r=%t2.o,_ZN1D1mEi,p \ 45; RUN: -r=%t2.o,_ZTV1B,px \ 46; RUN: -r=%t2.o,_ZTV1C,px \ 47; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK 48; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 49 50; Check that we're able to prevent specific function from being 51; devirtualized when running index based WPD. 52; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \ 53; RUN: -whole-program-visibility \ 54; RUN: -wholeprogramdevirt-skip=_ZN1A1nEi \ 55; RUN: -o %t3 \ 56; RUN: -r=%t2.o,test,px \ 57; RUN: -r=%t2.o,_ZN1A1nEi,p \ 58; RUN: -r=%t2.o,_ZN1B1fEi,p \ 59; RUN: -r=%t2.o,_ZN1C1fEi,p \ 60; RUN: -r=%t2.o,_ZN1D1mEi,p \ 61; RUN: -r=%t2.o,_ZTV1B,px \ 62; RUN: -r=%t2.o,_ZTV1C,px \ 63; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=SKIP 64 65; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \ 66; RUN: -whole-program-visibility \ 67; RUN: -o %t3 \ 68; RUN: -r=%t.o,test,px \ 69; RUN: -r=%t.o,_ZN1A1nEi,p \ 70; RUN: -r=%t.o,_ZN1B1fEi,p \ 71; RUN: -r=%t.o,_ZN1C1fEi,p \ 72; RUN: -r=%t.o,_ZN1D1mEi,p \ 73; RUN: -r=%t.o,_ZTV1B, \ 74; RUN: -r=%t.o,_ZTV1C, \ 75; RUN: -r=%t.o,_ZTV1D, \ 76; RUN: -r=%t.o,_ZN1A1nEi, \ 77; RUN: -r=%t.o,_ZN1B1fEi, \ 78; RUN: -r=%t.o,_ZN1C1fEi, \ 79; RUN: -r=%t.o,_ZN1D1mEi, \ 80; RUN: -r=%t.o,_ZTV1B,px \ 81; RUN: -r=%t.o,_ZTV1C,px \ 82; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail 83; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 84 85; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi 86; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi 87 88; SKIP-NOT: devirtualized a call to _ZN1A1nEi 89 90target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 91target triple = "x86_64-grtev4-linux-gnu" 92 93%struct.A = type { i32 (...)** } 94%struct.B = type { %struct.A } 95%struct.C = type { %struct.A } 96%struct.D = type { i32 (...)** } 97 98@_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 99@_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 !2 100@_ZTV1D = constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3 101 102 103; CHECK-IR-LABEL: define i32 @test 104define i32 @test(%struct.A* %obj, %struct.D* %obj2, i32 %a) { 105entry: 106 %0 = bitcast %struct.A* %obj to i8*** 107 %vtable = load i8**, i8*** %0 108 %1 = bitcast i8** %vtable to i8* 109 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A") 110 call void @llvm.assume(i1 %p) 111 %fptrptr = getelementptr i8*, i8** %vtable, i32 1 112 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)** 113 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8 114 115 ; Check that the call was devirtualized. 116 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi 117 ; Ensure !prof and !callees metadata for indirect call promotion removed. 118 ; CHECK-IR-NOT: prof 119 ; CHECK-IR-NOT: callees 120 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a), !prof !5, !callees !6 121 122 %3 = bitcast i8** %vtable to i32 (%struct.A*, i32)** 123 %fptr22 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %3, align 8 124 125 ; We still have to call it as virtual. 126 ; CHECK-IR: %call3 = tail call i32 %fptr22 127 %call3 = tail call i32 %fptr22(%struct.A* nonnull %obj, i32 %call) 128 129 %4 = bitcast %struct.D* %obj2 to i8*** 130 %vtable2 = load i8**, i8*** %4 131 %5 = bitcast i8** %vtable2 to i8* 132 %p2 = call i1 @llvm.type.test(i8* %5, metadata !4) 133 call void @llvm.assume(i1 %p2) 134 135 %6 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)** 136 %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %6, align 8 137 138 ; Check that the call was devirtualized. 139 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi 140 %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %call3) 141 ret i32 %call4 142} 143; CHECK-IR-LABEL: ret i32 144; CHECK-IR-LABEL: } 145 146declare i1 @llvm.type.test(i8*, metadata) 147declare void @llvm.assume(i1) 148 149define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 { 150 ret i32 0; 151} 152 153define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 { 154 ret i32 0; 155} 156 157define i32 @_ZN1C1fEi(%struct.C* %this, i32 %a) #0 { 158 ret i32 0; 159} 160 161define i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) #0 { 162 ret i32 0; 163} 164 165; Make sure we don't inline or otherwise optimize out the direct calls. 166attributes #0 = { noinline optnone } 167 168!0 = !{i64 16, !"_ZTS1A"} 169!1 = !{i64 16, !"_ZTS1B"} 170!2 = !{i64 16, !"_ZTS1C"} 171!3 = !{i64 16, !4} 172!4 = distinct !{} 173!5 = !{!"VP", i32 0, i64 1, i64 1621563287929432257, i64 1} 174!6 = !{i32 (%struct.A*, i32)* @_ZN1A1nEi} 175