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 -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; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \ 25; RUN: -o %t3 \ 26; RUN: -r=%t.o,test,px \ 27; RUN: -r=%t.o,_ZN1A1nEi,p \ 28; RUN: -r=%t.o,_ZN1B1fEi,p \ 29; RUN: -r=%t.o,_ZN1C1fEi,p \ 30; RUN: -r=%t.o,_ZN1D1mEi,p \ 31; RUN: -r=%t.o,_ZTV1B, \ 32; RUN: -r=%t.o,_ZTV1C, \ 33; RUN: -r=%t.o,_ZTV1D, \ 34; RUN: -r=%t.o,_ZN1A1nEi, \ 35; RUN: -r=%t.o,_ZN1B1fEi, \ 36; RUN: -r=%t.o,_ZN1C1fEi, \ 37; RUN: -r=%t.o,_ZN1D1mEi, \ 38; RUN: -r=%t.o,_ZTV1B,px \ 39; RUN: -r=%t.o,_ZTV1C,px \ 40; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail 41; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 42 43; Regular LTO WPD 44; RUN: opt -o %t4.o %s 45; RUN: llvm-lto2 run %t4.o -save-temps -pass-remarks=. \ 46; RUN: -whole-program-visibility \ 47; RUN: -o %t5 \ 48; RUN: -r=%t4.o,test,px \ 49; RUN: -r=%t4.o,_ZN1A1nEi,p \ 50; RUN: -r=%t4.o,_ZN1B1fEi,p \ 51; RUN: -r=%t4.o,_ZN1C1fEi,p \ 52; RUN: -r=%t4.o,_ZN1D1mEi,p \ 53; RUN: -r=%t4.o,_ZTV1B,px \ 54; RUN: -r=%t4.o,_ZTV1C,px \ 55; RUN: -r=%t4.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK 56; RUN: llvm-dis %t5.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 57 58; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi 59; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi 60 61target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 62target triple = "x86_64-grtev4-linux-gnu" 63 64%struct.A = type { ptr } 65%struct.B = type { %struct.A } 66%struct.C = type { %struct.A } 67%struct.D = type { ptr } 68 69@_ZTV1B = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !1, !vcall_visibility !5 70@_ZTV1C = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1C1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !2, !vcall_visibility !5 71@_ZTV1D = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEi] }, !type !3, !vcall_visibility !5 72 73 74; CHECK-IR-LABEL: define {{(noundef )?}}i32 @test 75define i32 @test(ptr %obj, ptr %obj2, i32 %a) { 76entry: 77 %vtable = load ptr, ptr %obj 78 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A") 79 call void @llvm.assume(i1 %p) 80 %fptrptr = getelementptr ptr, ptr %vtable, i32 1 81 %fptr1 = load ptr, ptr %fptrptr, align 8 82 83 ; Check that the call was devirtualized. 84 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi 85 %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a) 86 87 %fptr22 = load ptr, ptr %vtable, align 8 88 89 ; We still have to call it as virtual. 90 ; CHECK-IR: %call3 = tail call i32 %fptr22 91 %call3 = tail call i32 %fptr22(ptr nonnull %obj, i32 %call) 92 93 %vtable2 = load ptr, ptr %obj2 94 %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !4) 95 call void @llvm.assume(i1 %p2) 96 97 %fptr33 = load ptr, ptr %vtable2, align 8 98 99 ; Check that the call was devirtualized. 100 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi 101 %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %call3) 102 ret i32 %call4 103} 104; CHECK-IR-LABEL: ret i32 105; CHECK-IR-LABEL: } 106 107declare i1 @llvm.type.test(ptr, metadata) 108declare void @llvm.assume(i1) 109 110define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 { 111 ret i32 0; 112} 113 114define i32 @_ZN1A1nEi(ptr %this, i32 %a) #0 { 115 ret i32 0; 116} 117 118define i32 @_ZN1C1fEi(ptr %this, i32 %a) #0 { 119 ret i32 0; 120} 121 122define i32 @_ZN1D1mEi(ptr %this, i32 %a) #0 { 123 ret i32 0; 124} 125 126; Make sure we don't inline or otherwise optimize out the direct calls. 127attributes #0 = { noinline optnone } 128 129!0 = !{i64 16, !"_ZTS1A"} 130!1 = !{i64 16, !"_ZTS1B"} 131!2 = !{i64 16, !"_ZTS1C"} 132!3 = !{i64 16, !4} 133!4 = distinct !{} 134!5 = !{i64 1} 135