1; REQUIRES: x86-registered-target
2
3; Test that index-only devirtualization handles and ignores any
4; type metadata that could not be summarized (because it was internal
5; and could not be promoted due to the fact that the module has
6; no external symbols and therefore could not be assigned a unique
7; identifier). In this case we should simply not get the type
8; metadata summary entries, and no promotion will occur.
9
10; Generate unsplit module with summary for ThinLTO index-based WPD.
11; RUN: opt -thinlto-bc -thinlto-split-lto-unit=false -o %t2.o %s
12
13; Check that we don't have module flag when splitting not enabled for ThinLTO,
14; and that we generate summary information needed for index-based WPD.
15; RUN: llvm-dis -o - %t2.o | FileCheck %s --check-prefix=DIS
16; DIS-NOT: typeIdInfo
17; DIS-NOT: typeidMetadata
18
19; Index based WPD
20; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \
21; RUN:   -o %t3 \
22; RUN:   -r=%t2.o,test,plx \
23; RUN:   -r=%t2.o,_ZN1D1mEi,
24; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
25
26target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
27target triple = "x86_64-grtev4-linux-gnu"
28
29@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @g, i8* null }]
30
31%struct.D = type { i32 (...)** }
32
33@_ZTV1D = internal constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3
34
35; CHECK-IR-LABEL: define weak_odr dso_local i32 @test
36define weak_odr i32 @test(%struct.D* %obj2, i32 %a) {
37entry:
38  %0 = bitcast %struct.D* %obj2 to i8***
39  %vtable2 = load i8**, i8*** %0
40  %1 = bitcast i8** %vtable2 to i8*
41  %p2 = call i1 @llvm.type.test(i8* %1, metadata !4)
42  call void @llvm.assume(i1 %p2)
43
44  %2 = bitcast i8** %vtable2 to i32 (%struct.D*, i32)**
45  %fptr33 = load i32 (%struct.D*, i32)*, i32 (%struct.D*, i32)** %2, align 8
46
47  ; Check that the call was not devirtualized.
48  ; CHECK-IR: %call4 = tail call i32 %fptr33
49  %call4 = tail call i32 %fptr33(%struct.D* nonnull %obj2, i32 0)
50  ret i32 %call4
51}
52; CHECK-IR-LABEL: ret i32
53; CHECK-IR-LABEL: }
54
55; Function Attrs: inlinehint nounwind uwtable
56define internal void @_ZN1DC2Ev(%struct.D* %this) unnamed_addr align 2 {
57entry:
58  %this.addr = alloca %struct.D*, align 8
59  store %struct.D* %this, %struct.D** %this.addr, align 8
60  %this1 = load %struct.D*, %struct.D** %this.addr
61  %0 = bitcast %struct.D* %this1 to i32 (...)***
62  store i32 (...)** bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTV1D, i64 0, inrange i32 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 8
63  ret void
64}
65
66define internal void @g() section ".text.startup" {
67  %d = alloca %struct.D, align 8
68  call void @_ZN1DC2Ev(%struct.D* %d)
69  ret void
70}
71
72declare i1 @llvm.type.test(i8*, metadata)
73declare void @llvm.assume(i1)
74
75declare i32 @_ZN1D1mEi(%struct.D* %this, i32 %a)
76
77!3 = !{i64 16, !4}
78!4 = distinct !{}
79