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1; REQUIRES: x862;; Test that --lto-whole-program-visibility enables devirtualization.3 4;; Index based WPD5;; Generate unsplit module with summary for ThinLTO index-based WPD.6; RUN: opt --thinlto-bc -o %t2.o %s7; RUN: ld.lld %t2.o -o %t3 -save-temps --lto-whole-program-visibility \8; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck %s --check-prefix=REMARK9; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR10 11;; Hybrid WPD12;; Generate split module with summary for hybrid Thin/Regular LTO WPD.13; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t.o %s14; RUN: ld.lld %t.o -o %t3 -save-temps --lto-whole-program-visibility \15; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck %s --check-prefix=REMARK16; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR17 18;; Regular LTO WPD19; RUN: opt -o %t4.o %s20; RUN: ld.lld %t4.o -o %t3 -save-temps --lto-whole-program-visibility \21; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck %s --check-prefix=REMARK22; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR23 24; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi25; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi26 27;; Try everything again but without -whole-program-visibility to confirm28;; WPD fails29 30;; Index based WPD31; RUN: ld.lld %t2.o -o %t3 -save-temps \32; RUN: -mllvm -pass-remarks=. \33; RUN: 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty34; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR35;; Ensure --no-lto-whole-program-visibility overrides explicit --lto-whole-program-visibility.36; RUN: ld.lld %t2.o -o %t3 -save-temps --lto-whole-program-visibility --no-lto-whole-program-visibility \37; RUN: -mllvm -pass-remarks=. \38; RUN: 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty39; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR40 41;; Hybrid WPD42; RUN: ld.lld %t.o -o %t3 -save-temps \43; RUN: -mllvm -pass-remarks=. \44; RUN: 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty45; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR46 47;; Regular LTO WPD48; RUN: ld.lld %t4.o -o %t3 -save-temps \49; RUN: -mllvm -pass-remarks=. \50; RUN: 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty51; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR52 53target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"54target triple = "x86_64-grtev4-linux-gnu"55 56%struct.A = type { ptr }57%struct.B = type { %struct.A }58%struct.C = type { %struct.A }59%struct.D = type { ptr }60 61@_ZTV1B = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !1, !vcall_visibility !562@_ZTV1C = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1C1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !2, !vcall_visibility !563@_ZTV1D = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEi] }, !type !3, !vcall_visibility !564 65; Prevent the vtables from being dead code eliminated.66@llvm.used = appending global [3 x ptr] [ ptr @_ZTV1B, ptr @_ZTV1C, ptr @_ZTV1D]67 68; CHECK-IR-LABEL: define dso_local {{(noundef )?}}i32 @_start69define i32 @_start(ptr %obj, ptr %obj2, i32 %a) {70entry:71 %vtable = load ptr, ptr %obj72 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A")73 call void @llvm.assume(i1 %p)74 %fptrptr = getelementptr ptr, ptr %vtable, i32 175 %fptr1 = load ptr, ptr %fptrptr, align 876 77 ;; Check that the call was devirtualized.78 ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi79 ; CHECK-NODEVIRT-IR: %call = tail call i32 %fptr180 %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a)81 82 %fptr22 = load ptr, ptr %vtable, align 883 84 ;; We still have to call it as virtual.85 ; CHECK-IR: %call3 = tail call i32 %fptr2286 ; CHECK-NODEVIRT-IR: %call3 = tail call i32 %fptr2287 %call3 = tail call i32 %fptr22(ptr nonnull %obj, i32 %call)88 89 %vtable2 = load ptr, ptr %obj290 %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !4)91 call void @llvm.assume(i1 %p2)92 93 %fptr33 = load ptr, ptr %vtable2, align 894 95 ;; Check that the call was devirtualized.96 ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi97 ; CHECK-NODEVIRT-IR: %call4 = tail call i32 %fptr3398 %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %call3)99 ret i32 %call4100}101; CHECK-IR-LABEL: ret i32102; CHECK-IR-LABEL: }103 104declare i1 @llvm.type.test(ptr, metadata)105declare void @llvm.assume(i1)106 107define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 {108 ret i32 0;109}110 111define i32 @_ZN1A1nEi(ptr %this, i32 %a) #0 {112 ret i32 0;113}114 115define i32 @_ZN1C1fEi(ptr %this, i32 %a) #0 {116 ret i32 0;117}118 119define i32 @_ZN1D1mEi(ptr %this, i32 %a) #0 {120 ret i32 0;121}122 123;; Make sure we don't inline or otherwise optimize out the direct calls.124attributes #0 = { noinline optnone }125 126!0 = !{i64 16, !"_ZTS1A"}127!1 = !{i64 16, !"_ZTS1B"}128!2 = !{i64 16, !"_ZTS1C"}129!3 = !{i64 16, !4}130!4 = distinct !{}131!5 = !{i64 0}132