1 ; REQUIRES: x86-registered-target
3 ; Test that index-based devirtualization in the presence of external
4 ; vtables with the same name (with comdat) succeeds.
6 ; Generate unsplit module with summary for ThinLTO index-based WPD.
7 ; RUN: opt -thinlto-bc -o %t3.o %s
8 ; RUN: opt -thinlto-bc -o %t4.o %p/Inputs/devirt_external_comdat_same_guid.ll
10 ; RUN: llvm-lto2 run %t3.o %t4.o -save-temps -pass-remarks=. \
11 ; RUN: -whole-program-visibility \
12 ; RUN: -wholeprogramdevirt-print-index-based \
14 ; RUN: -r=%t3.o,use_B,px \
15 ; RUN: -r=%t3.o,test,px \
16 ; RUN: -r=%t3.o,_ZTV1B,px \
17 ; RUN: -r=%t3.o,_ZN1B1fEi,px \
18 ; RUN: -r=%t3.o,_ZN1B1nEi,px \
19 ; RUN: -r=%t4.o,_ZTV1B,x \
20 ; RUN: -r=%t4.o,_ZN1B1fEi,x \
21 ; RUN: -r=%t4.o,_ZN1A1nEi,x \
22 ; RUN: -r=%t4.o,test2,px \
23 ; RUN: 2>&1 | FileCheck %s --check-prefix=REMARK --check-prefix=PRINT
24 ; RUN: llvm-dis %t5.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR1
25 ; RUN: llvm-dis %t5.2.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR2
27 ; PRINT-DAG: Devirtualized call to {{.*}} (_ZN1A1nEi)
29 ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi
31 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
32 target triple = "x86_64-grtev4-linux-gnu"
36 %struct.A = type { ptr }
37 %struct.B = type { %struct.A }
41 @_ZTV1B = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1B1nEi] }, comdat, !type !0, !type !1
43 define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 comdat($_ZTV1B) {
47 define i32 @_ZN1B1nEi(ptr %this, i32 %a) #0 comdat($_ZTV1B) {
51 ; Ensures that vtable of B is live so that we will attempt devirt.
52 define dso_local i32 @use_B(ptr %a) {
54 store ptr getelementptr inbounds ({ [4 x ptr] }, ptr @_ZTV1B, i64 0, i32 0, i64 2), ptr %a, align 8
58 ; CHECK-IR1: define i32 @test(
59 define i32 @test(ptr %obj, i32 %a) {
61 %vtable = load ptr, ptr %obj
62 %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A")
63 call void @llvm.assume(i1 %p)
64 %fptrptr = getelementptr ptr, ptr %vtable, i32 1
65 %fptr1 = load ptr, ptr %fptrptr, align 8
67 ; Check that the call was devirtualized.
68 ; CHECK-IR1: tail call i32 {{.*}}@_ZN1A1nEi
69 %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a)
74 ; CHECK-IR2: define i32 @test2
75 ; Check that the call was devirtualized.
76 ; CHECK-IR2: tail call i32 @_ZN1A1nEi
78 declare i1 @llvm.type.test(ptr, metadata)
79 declare void @llvm.assume(i1)
81 attributes #0 = { noinline optnone }
83 !0 = !{i64 16, !"_ZTS1A"}
84 !1 = !{i64 16, !"_ZTS1B"}