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1; RUN: opt -instcombine -S < %s | FileCheck %s
2
3declare void @llvm.init.trampoline(i8*, i8*, i8*)
4declare i8* @llvm.adjust.trampoline(i8*)
5declare i32 @f(i8 * nest, i32)
6
7; Most common case
8define i32 @test0(i32 %n) {
9  %alloca = alloca [10 x i8], align 16
10  %gep = getelementptr [10 x i8]* %alloca, i32 0, i32 0
11  call void @llvm.init.trampoline(i8* %gep, i8* bitcast (i32 (i8*, i32)* @f to i8*),
12                                  i8* null)
13  %tramp = call i8* @llvm.adjust.trampoline(i8* %gep)
14  %function = bitcast i8* %tramp to i32(i32)*
15  %ret = call i32 %function(i32 %n)
16  ret i32 %ret
17
18; CHECK: define i32 @test0(i32 %n) {
19; CHECK: %ret = call i32 @f(i8* nest null, i32 %n)
20}
21
22define i32 @test1(i32 %n, i8* %trampmem) {
23  call void @llvm.init.trampoline(i8* %trampmem,
24                                  i8* bitcast (i32 (i8*, i32)* @f to i8*),
25                                  i8* null)
26  %tramp = call i8* @llvm.adjust.trampoline(i8* %trampmem)
27  %function = bitcast i8* %tramp to i32(i32)*
28  %ret = call i32 %function(i32 %n)
29  ret i32 %ret
30; CHECK: define i32 @test1(i32 %n, i8* %trampmem) {
31; CHECK: %ret = call i32 @f(i8* nest null, i32 %n)
32}
33
34define i32 @test2(i32 %n, i8* %trampmem) {
35  %tramp = call i8* @llvm.adjust.trampoline(i8* %trampmem)
36  %functiona = bitcast i8* %tramp to i32(i32)*
37  %ret = call i32 %functiona(i32 %n)
38  ret i32 %ret
39; CHECK: define i32 @test2(i32 %n, i8* %trampmem) {
40; CHECK: %ret = call i32 %functiona(i32 %n)
41}
42
43define i32 @test3(i32 %n, i8* %trampmem) {
44  call void @llvm.init.trampoline(i8* %trampmem,
45                                  i8* bitcast (i32 (i8*, i32)* @f to i8*),
46                                  i8* null)
47
48; CHECK: define i32 @test3(i32 %n, i8* %trampmem) {
49; CHECK: %ret0 = call i32 @f(i8* nest null, i32 %n)
50  %tramp0 = call i8* @llvm.adjust.trampoline(i8* %trampmem)
51  %function0 = bitcast i8* %tramp0 to i32(i32)*
52  %ret0 = call i32 %function0(i32 %n)
53
54  ;; Not optimized since previous call could be writing.
55  %tramp1 = call i8* @llvm.adjust.trampoline(i8* %trampmem)
56  %function1 = bitcast i8* %tramp1 to i32(i32)*
57  %ret1 = call i32 %function1(i32 %n)
58; CHECK: %ret1 = call i32 %function1(i32 %n)
59
60  ret i32 %ret1
61}
62
63define i32 @test4(i32 %n) {
64  %alloca = alloca [10 x i8], align 16
65  %gep = getelementptr [10 x i8]* %alloca, i32 0, i32 0
66  call void @llvm.init.trampoline(i8* %gep, i8* bitcast (i32 (i8*, i32)* @f to i8*),
67                                  i8* null)
68
69  %tramp0 = call i8* @llvm.adjust.trampoline(i8* %gep)
70  %function0 = bitcast i8* %tramp0 to i32(i32)*
71  %ret0 = call i32 %function0(i32 %n)
72
73  %tramp1 = call i8* @llvm.adjust.trampoline(i8* %gep)
74  %function1 = bitcast i8* %tramp0 to i32(i32)*
75  %ret1 = call i32 %function1(i32 %n)
76
77  %tramp2 = call i8* @llvm.adjust.trampoline(i8* %gep)
78  %function2 = bitcast i8* %tramp2 to i32(i32)*
79  %ret2 = call i32 %function2(i32 %n)
80
81  ret i32 %ret2
82
83; CHECK: define i32 @test4(i32 %n) {
84; CHECK: %ret0 = call i32 @f(i8* nest null, i32 %n)
85; CHECK: %ret1 = call i32 @f(i8* nest null, i32 %n)
86; CHECK: %ret2 = call i32 @f(i8* nest null, i32 %n)
87}
88