1; RUN: opt < %s -inline -S | FileCheck %s
2
3; Inlining a byval struct should cause an explicit copy into an alloca.
4
5	%struct.ss = type { i32, i64 }
6@.str = internal constant [10 x i8] c"%d, %lld\0A\00"		; <[10 x i8]*> [#uses=1]
7
8define internal void @f(%struct.ss* byval  %b) nounwind  {
9entry:
10	%tmp = getelementptr %struct.ss, %struct.ss* %b, i32 0, i32 0		; <i32*> [#uses=2]
11	%tmp1 = load i32, i32* %tmp, align 4		; <i32> [#uses=1]
12	%tmp2 = add i32 %tmp1, 1		; <i32> [#uses=1]
13	store i32 %tmp2, i32* %tmp, align 4
14	ret void
15}
16
17declare i32 @printf(i8*, ...) nounwind
18
19define i32 @test1() nounwind  {
20entry:
21	%S = alloca %struct.ss		; <%struct.ss*> [#uses=4]
22	%tmp1 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 0		; <i32*> [#uses=1]
23	store i32 1, i32* %tmp1, align 8
24	%tmp4 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 1		; <i64*> [#uses=1]
25	store i64 2, i64* %tmp4, align 4
26	call void @f( %struct.ss* byval  %S ) nounwind
27	ret i32 0
28; CHECK: @test1()
29; CHECK: %S1 = alloca %struct.ss
30; CHECK: %S = alloca %struct.ss
31; CHECK: call void @llvm.memcpy
32; CHECK: ret i32 0
33}
34
35; Inlining a byval struct should NOT cause an explicit copy
36; into an alloca if the function is readonly
37
38define internal i32 @f2(%struct.ss* byval  %b) nounwind readonly {
39entry:
40	%tmp = getelementptr %struct.ss, %struct.ss* %b, i32 0, i32 0		; <i32*> [#uses=2]
41	%tmp1 = load i32, i32* %tmp, align 4		; <i32> [#uses=1]
42	%tmp2 = add i32 %tmp1, 1		; <i32> [#uses=1]
43	ret i32 %tmp2
44}
45
46define i32 @test2() nounwind  {
47entry:
48	%S = alloca %struct.ss		; <%struct.ss*> [#uses=4]
49	%tmp1 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 0		; <i32*> [#uses=1]
50	store i32 1, i32* %tmp1, align 8
51	%tmp4 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 1		; <i64*> [#uses=1]
52	store i64 2, i64* %tmp4, align 4
53	%X = call i32 @f2( %struct.ss* byval  %S ) nounwind
54	ret i32 %X
55; CHECK: @test2()
56; CHECK: %S = alloca %struct.ss
57; CHECK-NOT: call void @llvm.memcpy
58; CHECK: ret i32
59}
60
61
62; Inlining a byval with an explicit alignment needs to use *at least* that
63; alignment on the generated alloca.
64; PR8769
65declare void @g3(%struct.ss* %p)
66
67define internal void @f3(%struct.ss* byval align 64 %b) nounwind {
68   call void @g3(%struct.ss* %b)  ;; Could make alignment assumptions!
69   ret void
70}
71
72define void @test3() nounwind  {
73entry:
74	%S = alloca %struct.ss, align 1  ;; May not be aligned.
75	call void @f3( %struct.ss* byval align 64 %S) nounwind
76	ret void
77; CHECK: @test3()
78; CHECK: %S1 = alloca %struct.ss, align 64
79; CHECK: %S = alloca %struct.ss
80; CHECK: call void @llvm.memcpy
81; CHECK: call void @g3(%struct.ss* %S1)
82; CHECK: ret void
83}
84
85
86; Inlining a byval struct should NOT cause an explicit copy
87; into an alloca if the function is readonly, but should increase an alloca's
88; alignment to satisfy an explicit alignment request.
89
90define internal i32 @f4(%struct.ss* byval align 64 %b) nounwind readonly {
91        call void @g3(%struct.ss* %b)
92	ret i32 4
93}
94
95define i32 @test4() nounwind  {
96entry:
97	%S = alloca %struct.ss, align 2		; <%struct.ss*> [#uses=4]
98	%X = call i32 @f4( %struct.ss* byval align 64 %S ) nounwind
99	ret i32 %X
100; CHECK: @test4()
101; CHECK: %S = alloca %struct.ss, align 64
102; CHECK-NOT: call void @llvm.memcpy
103; CHECK: call void @g3
104; CHECK: ret i32 4
105}
106
107%struct.S0 = type { i32 }
108
109@b = global %struct.S0 { i32 1 }, align 4
110@a = common global i32 0, align 4
111
112define internal void @f5(%struct.S0* byval nocapture readonly align 4 %p) {
113entry:
114	store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4
115	%f2 = getelementptr inbounds %struct.S0, %struct.S0* %p, i64 0, i32 0
116	%0 = load i32, i32* %f2, align 4
117	store i32 %0, i32* @a, align 4
118	ret void
119}
120
121define i32 @test5() {
122entry:
123	tail call void @f5(%struct.S0* byval align 4 @b)
124	%0 = load i32, i32* @a, align 4
125	ret i32 %0
126; CHECK: @test5()
127; CHECK: store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4
128; CHECK-NOT: load i32, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4
129}
130