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; Legacy PM, 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; New PM, Index based WPD 66; RUN: llvm-lto2 run %t2.o -save-temps -use-new-pm -pass-remarks=. \ 67; RUN: -whole-program-visibility \ 68; RUN: -o %t3 \ 69; RUN: -r=%t2.o,test,px \ 70; RUN: -r=%t2.o,_ZN1A1nEi,p \ 71; RUN: -r=%t2.o,_ZN1B1fEi,p \ 72; RUN: -r=%t2.o,_ZN1C1fEi,p \ 73; RUN: -r=%t2.o,_ZN1D1mEi,p \ 74; RUN: -r=%t2.o,_ZTV1B,px \ 75; RUN: -r=%t2.o,_ZTV1C,px \ 76; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK 77; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 78 79; Legacy PM 80; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436. 81; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \ 82; RUN: -whole-program-visibility \ 83; RUN: -verify-machineinstrs=0 \ 84; RUN: -o %t3 \ 85; RUN: -r=%t.o,test,px \ 86; RUN: -r=%t.o,_ZN1A1nEi,p \ 87; RUN: -r=%t.o,_ZN1B1fEi,p \ 88; RUN: -r=%t.o,_ZN1C1fEi,p \ 89; RUN: -r=%t.o,_ZN1D1mEi,p \ 90; RUN: -r=%t.o,_ZTV1B, \ 91; RUN: -r=%t.o,_ZTV1C, \ 92; RUN: -r=%t.o,_ZTV1D, \ 93; RUN: -r=%t.o,_ZN1A1nEi, \ 94; RUN: -r=%t.o,_ZN1B1fEi, \ 95; RUN: -r=%t.o,_ZN1C1fEi, \ 96; RUN: -r=%t.o,_ZN1D1mEi, \ 97; RUN: -r=%t.o,_ZTV1B,px \ 98; RUN: -r=%t.o,_ZTV1C,px \ 99; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail 100; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 101 102; New PM 103; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436. 104; RUN: llvm-lto2 run %t.o -save-temps -use-new-pm -pass-remarks=. \ 105; RUN: -whole-program-visibility \ 106; RUN: -verify-machineinstrs=0 \ 107; RUN: -o %t3 \ 108; RUN: -r=%t.o,test,px \ 109; RUN: -r=%t.o,_ZN1A1nEi,p \ 110; RUN: -r=%t.o,_ZN1B1fEi,p \ 111; RUN: -r=%t.o,_ZN1C1fEi,p \ 112; RUN: -r=%t.o,_ZN1D1mEi,p \ 113; RUN: -r=%t.o,_ZTV1B, \ 114; RUN: -r=%t.o,_ZTV1C, \ 115; RUN: -r=%t.o,_ZTV1D, \ 116; RUN: -r=%t.o,_ZN1A1nEi, \ 117; RUN: -r=%t.o,_ZN1B1fEi, \ 118; RUN: -r=%t.o,_ZN1C1fEi, \ 119; RUN: -r=%t.o,_ZN1D1mEi, \ 120; RUN: -r=%t.o,_ZTV1B,px \ 121; RUN: -r=%t.o,_ZTV1C,px \ 122; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail 123; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 124 125; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi 126; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi 127 128; SKIP-NOT: devirtualized a call to _ZN1A1nEi 129 130target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 131target triple = "x86_64-grtev4-linux-gnu" 132 133%struct.A = type { i32 (...)** } 134%struct.B = type { %struct.A } 135%struct.C = type { %struct.A } 136%struct.D = type { i32 (...)** } 137 138@_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 !1 139@_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 !2 140@_ZTV1D = constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3 141 142 143; CHECK-IR-LABEL: define i32 @test 144define i32 @test(%struct.A* %obj, %struct.D* %obj2, i32 %a) { 145entry: 146 %0 = bitcast %struct.A* %obj to i8*** 147 %vtable = load i8**, i8*** %0 148 %1 = bitcast i8** %vtable to i8* 149 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A") 150 call void @llvm.assume(i1 %p) 151 %fptrptr = getelementptr i8*, i8** %vtable, i32 1 152 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)** 153 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8 154 155 ; Check that the call was devirtualized. 156 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi 157 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a) 158 159 %3 = bitcast i8** %vtable to i32 (%struct.A*, i32)** 160 %fptr22 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %3, align 8 161 162 ; We still have to call it as virtual. 163 ; CHECK-IR: %call3 = tail call i32 %fptr22 164 %call3 = tail call i32 %fptr22(%struct.A* nonnull %obj, i32 %call) 165 166 %4 = bitcast %struct.D* %obj2 to i8*** 167 %vtable2 = load i8**, i8*** %4 168 %5 = bitcast i8** %vtable2 to i8* 169 %p2 = call i1 @llvm.type.test(i8* %5, metadata !4) 170 call void @llvm.assume(i1 %p2) 171 172 %6 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)** 173 %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %6, align 8 174 175 ; Check that the call was devirtualized. 176 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi 177 %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %call3) 178 ret i32 %call4 179} 180; CHECK-IR-LABEL: ret i32 181; CHECK-IR-LABEL: } 182 183declare i1 @llvm.type.test(i8*, metadata) 184declare void @llvm.assume(i1) 185 186define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 { 187 ret i32 0; 188} 189 190define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 { 191 ret i32 0; 192} 193 194define i32 @_ZN1C1fEi(%struct.C* %this, i32 %a) #0 { 195 ret i32 0; 196} 197 198define i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) #0 { 199 ret i32 0; 200} 201 202; Make sure we don't inline or otherwise optimize out the direct calls. 203attributes #0 = { noinline optnone } 204 205!0 = !{i64 16, !"_ZTS1A"} 206!1 = !{i64 16, !"_ZTS1B"} 207!2 = !{i64 16, !"_ZTS1C"} 208!3 = !{i64 16, !4} 209!4 = distinct !{} 210