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 2>&1 | FileCheck %s --check-prefix=REMARK 11; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 12 13;; Hybrid WPD 14;; Generate split module with summary for hybrid Thin/Regular LTO WPD. 15; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s 16; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 17; RUN: --plugin-opt=whole-program-visibility \ 18; RUN: --plugin-opt=save-temps \ 19; RUN: --plugin-opt=-pass-remarks=. \ 20; RUN: %t.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK 21; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 22 23;; Regular LTO WPD 24; RUN: opt -o %t4.o %s 25; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 26; RUN: --plugin-opt=whole-program-visibility \ 27; RUN: --plugin-opt=save-temps \ 28; RUN: --plugin-opt=-pass-remarks=. \ 29; RUN: %t4.o -o %t3 2>&1 | FileCheck %s --check-prefix=REMARK 30; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR 31 32; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi 33; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi 34 35;; Try everything again but without -whole-program-visibility to confirm 36;; WPD fails 37 38;; Index based WPD 39; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 40; RUN: --plugin-opt=save-temps \ 41; RUN: --plugin-opt=-pass-remarks=. \ 42; RUN: %t2.o -o %t3 \ 43; RUN: 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 44; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 45 46;; Hybrid WPD 47; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 48; RUN: --plugin-opt=save-temps \ 49; RUN: --plugin-opt=-pass-remarks=. \ 50; RUN: %t.o -o %t3 \ 51; RUN: 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 52; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 53 54;; Regular LTO WPD 55; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \ 56; RUN: --plugin-opt=save-temps \ 57; RUN: --plugin-opt=-pass-remarks=. \ 58; RUN: %t4.o -o %t3 \ 59; RUN: 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty 60; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR 61 62target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 63target triple = "x86_64-grtev4-linux-gnu" 64 65%struct.A = type { ptr } 66%struct.B = type { %struct.A } 67%struct.C = type { %struct.A } 68%struct.D = type { ptr } 69 70@_ZTV1B = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !1, !vcall_visibility !5 71@_ZTV1C = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1C1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !2, !vcall_visibility !5 72@_ZTV1D = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEi] }, !type !3, !vcall_visibility !5 73 74; Prevent the vtables from being dead code eliminated. 75@llvm.used = appending global [3 x ptr] [ ptr @_ZTV1B, ptr @_ZTV1C, ptr @_ZTV1D] 76 77; CHECK-IR-LABEL: define dso_local {{(noundef )?}}i32 @_start 78define i32 @_start(ptr %obj, ptr %obj2, i32 %a) { 79entry: 80 %vtable = load ptr, ptr %obj 81 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A") 82 call void @llvm.assume(i1 %p) 83 %fptrptr = getelementptr ptr, ptr %vtable, i32 1 84 %fptr1 = load ptr, ptr %fptrptr, align 8 85 86 ;; Check that the call was devirtualized. 87 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi 88 ; CHECK-NODEVIRT-IR: %call = tail call i32 %fptr1 89 %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a) 90 91 %fptr22 = load ptr, ptr %vtable, align 8 92 93 ;; We still have to call it as virtual. 94 ; CHECK-IR: %call3 = tail call i32 %fptr22 95 ; CHECK-NODEVIRT-IR: %call3 = tail call i32 %fptr22 96 %call3 = tail call i32 %fptr22(ptr nonnull %obj, i32 %call) 97 98 %vtable2 = load ptr, ptr %obj2 99 %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !4) 100 call void @llvm.assume(i1 %p2) 101 102 %fptr33 = load ptr, ptr %vtable2, align 8 103 104 ;; Check that the call was devirtualized. 105 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi 106 ; CHECK-NODEVIRT-IR: %call4 = tail call i32 %fptr33 107 %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %call3) 108 ret i32 %call4 109} 110; CHECK-IR-LABEL: ret i32 111; CHECK-IR-LABEL: } 112 113declare i1 @llvm.type.test(ptr, metadata) 114declare void @llvm.assume(i1) 115 116define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 { 117 ret i32 0; 118} 119 120define i32 @_ZN1A1nEi(ptr %this, i32 %a) #0 { 121 ret i32 0; 122} 123 124define i32 @_ZN1C1fEi(ptr %this, i32 %a) #0 { 125 ret i32 0; 126} 127 128define i32 @_ZN1D1mEi(ptr %this, i32 %a) #0 { 129 ret i32 0; 130} 131 132;; Make sure we don't inline or otherwise optimize out the direct calls. 133attributes #0 = { noinline optnone } 134 135!0 = !{i64 16, !"_ZTS1A"} 136!1 = !{i64 16, !"_ZTS1B"} 137!2 = !{i64 16, !"_ZTS1C"} 138!3 = !{i64 16, !4} 139!4 = distinct !{} 140!5 = !{i64 0} 141