1; -stats requires asserts
2; REQUIRES: asserts
3
4; RUN: opt -S -passes=wholeprogramdevirt -whole-program-visibility -pass-remarks=wholeprogramdevirt -stats %s 2>&1 | FileCheck %s
5
6target datalayout = "e-p:64:64"
7target triple = "x86_64-unknown-linux-gnu"
8
9; CHECK: remark: {{.*}} unique-ret-val: devirtualized a call to vf0
10; CHECK: remark: {{.*}} unique-ret-val: devirtualized a call to vf0
11; CHECK: remark: {{.*}} devirtualized vf0
12; CHECK: remark: {{.*}} devirtualized vf1
13
14@vt1 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf0 to i8*)], !type !0
15@vt2 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf0 to i8*)], !type !0, !type !1
16@vt3 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf1 to i8*)], !type !0, !type !1
17@vt4 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf1 to i8*)], !type !1
18
19define i1 @vf0(i8* %this) readnone {
20  ret i1 0
21}
22
23define i1 @vf1(i8* %this) readnone {
24  ret i1 1
25}
26
27; CHECK: define i1 @call1
28define i1 @call1(i8* %obj) {
29  %vtableptr = bitcast i8* %obj to [1 x i8*]**
30  %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
31  %vtablei8 = bitcast [1 x i8*]* %vtable to i8*
32  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid1")
33  call void @llvm.assume(i1 %p)
34  %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
35  %fptr = load i8*, i8** %fptrptr
36  %fptr_casted = bitcast i8* %fptr to i1 (i8*)*
37  ; CHECK: [[RES1:%[^ ]*]] = icmp eq [1 x i8*]* %vtable, @vt3
38  %result = call i1 %fptr_casted(i8* %obj)
39  ; CHECK: ret i1 [[RES1]]
40  ret i1 %result
41}
42
43; CHECK: define i32 @call2
44define i32 @call2(i8* %obj) {
45  %vtableptr = bitcast i8* %obj to [1 x i8*]**
46  %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
47  %vtablei8 = bitcast [1 x i8*]* %vtable to i8*
48  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid2")
49  call void @llvm.assume(i1 %p)
50  %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
51  %fptr = load i8*, i8** %fptrptr
52  ; Intentional type mismatch to test zero extend.
53  %fptr_casted = bitcast i8* %fptr to i32 (i8*)*
54  ; CHECK: [[RES2:%[^ ]*]] = icmp ne [1 x i8*]* %vtable, @vt2
55  %result = call i32 %fptr_casted(i8* %obj)
56  ; CHECK: [[ZEXT2:%[^ ]*]] = zext i1 [[RES2]] to i32
57  ; CHECK: ret i32 [[ZEXT2:%[^ ]*]]
58  ret i32 %result
59}
60
61declare i1 @llvm.type.test(i8*, metadata)
62declare void @llvm.assume(i1)
63
64!0 = !{i32 0, !"typeid1"}
65!1 = !{i32 0, !"typeid2"}
66
67; CHECK: 2 wholeprogramdevirt - Number of whole program devirtualization targets
68; CHECK: 2 wholeprogramdevirt - Number of unique return value optimizations
69