1; Test that plugin option whole-program-visibility enables devirtualization. 2 3; Index based WPD 4; Generate unsplit module with summary for ThinLTO index-based WPD. 5; RUN: opt -thinlto-bc -o %t2.o %s 6; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 7; RUN: --plugin-opt=whole-program-visibility \ 8; RUN: --plugin-opt=save-temps \ 9; RUN: --plugin-opt=-pass-remarks=. \ 10; RUN: %t2.o -o %t3 \ 11; RUN: --export-dynamic 2>&1 | FileCheck %s --check-prefix=REMARK 12; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 13 14; Hybrid WPD 15; Generate split module with summary for hybrid Thin/Regular LTO WPD. 16; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s 17; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 18; RUN: --plugin-opt=whole-program-visibility \ 19; RUN: --plugin-opt=save-temps \ 20; RUN: --plugin-opt=-pass-remarks=. \ 21; RUN: %t.o -o %t3 \ 22; RUN: --export-dynamic 2>&1 | FileCheck %s --check-prefix=REMARK 23; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 24 25; Regular LTO WPD 26; RUN: opt -o %t4.o %s 27; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 28; RUN: --plugin-opt=whole-program-visibility \ 29; RUN: --plugin-opt=save-temps \ 30; RUN: --plugin-opt=-pass-remarks=. \ 31; RUN: %t4.o -o %t3 \ 32; RUN: --export-dynamic 2>&1 | FileCheck %s --check-prefix=REMARK 33; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 34 35; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi 36; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi 37 38; Try everything again but without -whole-program-visibility to confirm 39; WPD fails 40 41; Index based WPD 42; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 43; RUN: --plugin-opt=save-temps \ 44; RUN: --plugin-opt=-pass-remarks=. \ 45; RUN: %t2.o -o %t3 \ 46; RUN: --export-dynamic 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty 47; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 48 49; Hybrid WPD 50; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 51; RUN: --plugin-opt=save-temps \ 52; RUN: --plugin-opt=-pass-remarks=. \ 53; RUN: %t.o -o %t3 \ 54; RUN: --export-dynamic 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty 55; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 56 57; Regular LTO WPD 58; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 59; RUN: --plugin-opt=save-temps \ 60; RUN: --plugin-opt=-pass-remarks=. \ 61; RUN: %t4.o -o %t3 \ 62; RUN: --export-dynamic 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty 63; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-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.A = type { i32 (...)** } 69%struct.B = type { %struct.A } 70%struct.C = type { %struct.A } 71%struct.D = type { i32 (...)** } 72 73@_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 74@_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 75@_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 76 77 78; CHECK-IR-LABEL: define dso_local i32 @_start 79define i32 @_start(%struct.A* %obj, %struct.D* %obj2, i32 %a) { 80entry: 81 %0 = bitcast %struct.A* %obj to i8*** 82 %vtable = load i8**, i8*** %0 83 %1 = bitcast i8** %vtable to i8* 84 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A") 85 call void @llvm.assume(i1 %p) 86 %fptrptr = getelementptr i8*, i8** %vtable, i32 1 87 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)** 88 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 8 89 90 ; Check that the call was devirtualized. 91 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi 92 ; CHECK-NODEVIRT-IR: %call = tail call i32 %fptr1 93 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a) 94 95 %3 = bitcast i8** %vtable to i32 (%struct.A*, i32)** 96 %fptr22 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %3, align 8 97 98 ; We still have to call it as virtual. 99 ; CHECK-IR: %call3 = tail call i32 %fptr22 100 ; CHECK-NODEVIRT-IR: %call3 = tail call i32 %fptr22 101 %call3 = tail call i32 %fptr22(%struct.A* nonnull %obj, i32 %call) 102 103 %4 = bitcast %struct.D* %obj2 to i8*** 104 %vtable2 = load i8**, i8*** %4 105 %5 = bitcast i8** %vtable2 to i8* 106 %p2 = call i1 @llvm.type.test(i8* %5, metadata !4) 107 call void @llvm.assume(i1 %p2) 108 109 %6 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)** 110 %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %6, align 8 111 112 ; Check that the call was devirtualized. 113 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi 114 ; CHECK-NODEVIRT-IR: %call4 = tail call i32 %fptr33 115 %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 %call3) 116 ret i32 %call4 117} 118; CHECK-IR-LABEL: ret i32 119; CHECK-IR-LABEL: } 120 121declare i1 @llvm.type.test(i8*, metadata) 122declare void @llvm.assume(i1) 123 124define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 { 125 ret i32 0; 126} 127 128define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 { 129 ret i32 0; 130} 131 132define i32 @_ZN1C1fEi(%struct.C* %this, i32 %a) #0 { 133 ret i32 0; 134} 135 136define i32 @_ZN1D1mEi(%struct.D* %this, i32 %a) #0 { 137 ret i32 0; 138} 139 140; Make sure we don't inline or otherwise optimize out the direct calls. 141attributes #0 = { noinline optnone } 142 143!0 = !{i64 16, !"_ZTS1A"} 144!1 = !{i64 16, !"_ZTS1B"} 145!2 = !{i64 16, !"_ZTS1C"} 146!3 = !{i64 16, !4} 147!4 = distinct !{} 148!5 = !{i64 0} 149