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1; REQUIRES: x86-registered-target2 3; Test that devirtualization option -wholeprogramdevirt-check adds code to check4; that the devirtualization decision was correct and trap or fallback if not.5 6; The vtables have vcall_visibility metadata with hidden visibility, to enable7; devirtualization.8 9; Generate unsplit module with summary for ThinLTO index-based WPD.10; RUN: opt -thinlto-bc -o %t2.o %s11 12; Check first in trapping mode.13; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \14; RUN: -wholeprogramdevirt-check=trap \15; RUN: -o %t3 \16; RUN: -r=%t2.o,test,px \17; RUN: -r=%t2.o,_ZN1A1nEi,p \18; RUN: -r=%t2.o,_ZN1B1fEi,p \19; RUN: -r=%t2.o,_ZTV1B,px 2>&1 | FileCheck %s --check-prefix=REMARK20; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK --check-prefix=TRAP21 22; Check next in fallback mode.23; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \24; RUN: -wholeprogramdevirt-check=fallback \25; RUN: -o %t3 \26; RUN: -r=%t2.o,test,px \27; RUN: -r=%t2.o,_ZN1A1nEi,p \28; RUN: -r=%t2.o,_ZN1B1fEi,p \29; RUN: -r=%t2.o,_ZTV1B,px 2>&1 | FileCheck %s --check-prefix=REMARK30; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK --check-prefix=FALLBACK31 32; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi33 34target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"35target triple = "x86_64-grtev4-linux-gnu"36 37%struct.A = type { i32 (...)** }38%struct.B = type { %struct.A }39 40@_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 !541 42 43; CHECK-LABEL: define {{(noundef )?}}i32 @test44define i32 @test(%struct.A* %obj, i32 %a) {45entry:46 %0 = bitcast %struct.A* %obj to i8***47 %vtable = load i8**, i8*** %048 %1 = bitcast i8** %vtable to i8*49 %p = call i1 @llvm.type.test(i8* %1, metadata !"_ZTS1A")50 call void @llvm.assume(i1 %p)51 %fptrptr = getelementptr i8*, i8** %vtable, i32 152 %2 = bitcast i8** %fptrptr to i32 (%struct.A*, i32)**53 %fptr1 = load i32 (%struct.A*, i32)*, i32 (%struct.A*, i32)** %2, align 854 55 ; Check that the call was devirtualized, but preceeded by a check guarding56 ; a trap if the function pointer doesn't match.57 ; TRAP: %.not = icmp eq ptr %fptr1, @_ZN1A1nEi58 ; Ensure !prof and !callees metadata for indirect call promotion removed.59 ; TRAP-NOT: prof60 ; TRAP-NOT: callees61 ; TRAP: br i1 %.not, label %1, label %0, !prof ![[PROF:[0-9]+]]62 ; TRAP: 0:63 ; TRAP: tail call void @llvm.debugtrap()64 ; TRAP: br label %165 ; TRAP: 1:66 ; TRAP: tail call i32 @_ZN1A1nEi67 ; Check that the call was devirtualized, but preceeded by a check guarding68 ; a fallback if the function pointer doesn't match.69 ; FALLBACK: %0 = icmp eq ptr %fptr1, @_ZN1A1nEi70 ; FALLBACK: br i1 %0, label %if.true.direct_targ, label %if.false.orig_indirect71 ; FALLBACK: if.true.direct_targ:72 ; FALLBACK: tail call i32 @_ZN1A1nEi73 ; Ensure !prof and !callees metadata for indirect call promotion removed.74 ; FALLBACK-NOT: prof75 ; FALLBACK-NOT: callees76 ; FALLBACK: br label %if.end.icp77 ; FALLBACK: if.false.orig_indirect:78 ; FALLBACK: tail call i32 %fptr179 ; Ensure !prof and !callees metadata for indirect call promotion removed.80 ; In particular, if left on the fallback indirect call ICP may perform an81 ; additional round of promotion.82 ; FALLBACK-NOT: prof83 ; FALLBACK-NOT: callees84 ; FALLBACK: br label %if.end.icp85 %call = tail call i32 %fptr1(%struct.A* nonnull %obj, i32 %a), !prof !6, !callees !786 87 ret i32 %call88}89; CHECK-LABEL: ret i3290; CHECK-LABEL: }91 92; TRAP: ![[PROF]] = !{!"branch_weights", i32 1048575, i32 1}93 94declare i1 @llvm.type.test(i8*, metadata)95declare void @llvm.assume(i1)96 97define i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) #0 {98 ret i32 0;99}100 101define i32 @_ZN1A1nEi(%struct.A* %this, i32 %a) #0 {102 ret i32 0;103}104 105; Make sure we don't inline or otherwise optimize out the direct calls.106attributes #0 = { noinline optnone }107 108!0 = !{i64 16, !"_ZTS1A"}109!1 = !{i64 16, !"_ZTS1B"}110!3 = !{i64 16, !4}111!4 = distinct !{}112!5 = !{i64 1}113!6 = !{!"VP", i32 0, i64 1, i64 1621563287929432257, i64 1}114!7 = !{i32 (%struct.A*, i32)* @_ZN1A1nEi}115