1;; Test that dynamically exported symbols prevent devirtualization. 2;; Note that --export-dynamic-symbol and --dynamic-list are tested similarly 3;; in the v1.16 directory, because those were not properly passed down to the 4;; plugin until then. 5 6;; First check that we get devirtualization without any export dynamic options. 7 8;; Index based WPD 9;; Generate unsplit module with summary for ThinLTO index-based WPD. 10; RUN: opt -thinlto-bc -o %t2.o %s 11; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 12; RUN: --plugin-opt=whole-program-visibility \ 13; RUN: --plugin-opt=save-temps \ 14; RUN: --plugin-opt=-pass-remarks=. \ 15; RUN: %t2.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK 16; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 17 18;; Hybrid WPD 19;; Generate split module with summary for hybrid Thin/Regular LTO WPD. 20; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s 21; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 22; RUN: --plugin-opt=whole-program-visibility \ 23; RUN: --plugin-opt=save-temps \ 24; RUN: --plugin-opt=-pass-remarks=. \ 25; RUN: %t.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK 26; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 27 28;; Regular LTO WPD 29; RUN: opt -o %t4.o %s 30; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 31; RUN: --plugin-opt=whole-program-visibility \ 32; RUN: --plugin-opt=save-temps \ 33; RUN: --plugin-opt=-pass-remarks=. \ 34; RUN: %t4.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK 35; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 36 37; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi 38; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi 39 40;; Check that all WPD fails with --export-dynamic. 41 42;; Index based WPD 43; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 44; RUN: --plugin-opt=whole-program-visibility \ 45; RUN: --plugin-opt=save-temps \ 46; RUN: --plugin-opt=-pass-remarks=. \ 47; RUN: %t2.o -o %t3 \ 48; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 49; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 50 51;; Hybrid WPD 52; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 53; RUN: --plugin-opt=whole-program-visibility \ 54; RUN: --plugin-opt=save-temps \ 55; RUN: --plugin-opt=-pass-remarks=. \ 56; RUN: %t.o -o %t3 \ 57; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 58; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 59 60;; Regular LTO WPD 61; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 62; RUN: --plugin-opt=whole-program-visibility \ 63; RUN: --plugin-opt=save-temps \ 64; RUN: --plugin-opt=-pass-remarks=. \ 65; RUN: %t4.o -o %t3 \ 66; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 67; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 68 69;; Check that all WPD fails with when linking against a shared library containing 70;; preemptible versions of the vtables. In this case the symbols in the object being 71;; linked against the shared library must be exported to .dynsym to allow the runtime 72;; preemption, even without any options. 73 74;; Index based WPD 75; RUN: opt -relocation-model=pic --thinlto-bc -o %t5.o %s 76; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 77; RUN: %t5.o -o %t5.so -shared 78; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 79; RUN: --plugin-opt=whole-program-visibility \ 80; RUN: --plugin-opt=-pass-remarks=. \ 81; RUN: %t5.o %t5.so -o %t5 \ 82; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 83 84;; Hybrid WPD 85; RUN: opt -relocation-model=pic --thinlto-bc --thinlto-split-lto-unit -o %t5.o %s 86; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 87; RUN: %t5.o -o %t5.so -shared 88; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 89; RUN: --plugin-opt=whole-program-visibility \ 90; RUN: --plugin-opt=-pass-remarks=. \ 91; RUN: %t5.o %t5.so -o %t5 \ 92; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 93 94;; Regular LTO WPD 95; RUN: opt -relocation-model=pic -o %t5.o %s 96; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 97; RUN: %t5.o -o %t5.so -shared 98; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 99; RUN: --plugin-opt=whole-program-visibility \ 100; RUN: --plugin-opt=-pass-remarks=. \ 101; RUN: %t5.o %t5.so -o %t5 \ 102; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 103 104target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 105target triple = "x86_64-grtev4-linux-gnu" 106 107%struct.A = type { ptr } 108%struct.B = type { %struct.A } 109%struct.C = type { %struct.A } 110%struct.D = type { ptr } 111 112@_ZTV1B = linkonce_odr unnamed_addr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !1, !vcall_visibility !5 113@_ZTV1C = linkonce_odr unnamed_addr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1C1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !2, !vcall_visibility !5 114@_ZTV1D = linkonce_odr unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEi] }, !type !3, !vcall_visibility !5 115 116;; Prevent the vtables from being dead code eliminated. 117@llvm.used = appending global [3 x ptr] [ ptr @_ZTV1B, ptr @_ZTV1C, ptr @_ZTV1D] 118 119; CHECK-IR-LABEL: define dso_local {{(noundef )?}}i32 @_start 120define i32 @_start(ptr %obj, ptr %obj2, i32 %a) { 121entry: 122 %vtable = load ptr, ptr %obj 123 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A") 124 call void @llvm.assume(i1 %p) 125 %fptrptr = getelementptr ptr, ptr %vtable, i32 1 126 %fptr1 = load ptr, ptr %fptrptr, align 8 127 128 ;; Check that the call was devirtualized. 129 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi 130 ; CHECK-NODEVIRT-IR: %call = tail call i32 %fptr1 131 %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a) 132 133 %fptr22 = load ptr, ptr %vtable, align 8 134 135 ;; We still have to call it as virtual. 136 ; CHECK-IR: %call3 = tail call i32 %fptr22 137 ; CHECK-NODEVIRT-IR: %call3 = tail call i32 %fptr22 138 %call3 = tail call i32 %fptr22(ptr nonnull %obj, i32 %call) 139 140 %vtable2 = load ptr, ptr %obj2 141 %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !4) 142 call void @llvm.assume(i1 %p2) 143 144 %fptr33 = load ptr, ptr %vtable2, align 8 145 146 ;; Check that the call was devirtualized. 147 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi 148 ; CHECK-NODEVIRT-IR: %call4 = tail call i32 %fptr33 149 %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %call3) 150 ret i32 %call4 151} 152; CHECK-IR-LABEL: ret i32 153; CHECK-IR-LABEL: } 154 155declare i1 @llvm.type.test(ptr, metadata) 156declare void @llvm.assume(i1) 157 158define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 { 159 ret i32 0; 160} 161 162define i32 @_ZN1A1nEi(ptr %this, i32 %a) #0 { 163 ret i32 0; 164} 165 166define i32 @_ZN1C1fEi(ptr %this, i32 %a) #0 { 167 ret i32 0; 168} 169 170define i32 @_ZN1D1mEi(ptr %this, i32 %a) #0 { 171 ret i32 0; 172} 173 174;; Make sure we don't inline or otherwise optimize out the direct calls. 175attributes #0 = { noinline optnone } 176 177!0 = !{i64 16, !"_ZTS1A"} 178!1 = !{i64 16, !"_ZTS1B"} 179!2 = !{i64 16, !"_ZTS1C"} 180!3 = !{i64 16, !4} 181!4 = distinct !{} 182!5 = !{i64 0} 183