xref: /llvm-project/llvm/test/Transforms/GlobalOpt/fastcc.ll (revision d4191beeb94874e688794b35850c7e5bf0df959e)
1; RUN: opt < %s -passes=globalopt -S | FileCheck %s
2
3declare token @llvm.call.preallocated.setup(i32)
4declare ptr @llvm.call.preallocated.arg(token, i32)
5
6define internal i32 @f(ptr %m) {
7; CHECK-LABEL: define internal fastcc i32 @f
8  %v = load i32, ptr %m
9  ret i32 %v
10}
11
12define internal x86_thiscallcc i32 @g(ptr %m) {
13; CHECK-LABEL: define internal fastcc i32 @g
14  %v = load i32, ptr %m
15  ret i32 %v
16}
17
18; Leave this one alone, because the user went out of their way to request this
19; convention.
20define internal coldcc i32 @h(ptr %m) {
21; CHECK-LABEL: define internal coldcc i32 @h
22  %v = load i32, ptr %m
23  ret i32 %v
24}
25
26define internal i32 @j(ptr %m) {
27; CHECK-LABEL: define internal i32 @j
28  %v = load i32, ptr %m
29  ret i32 %v
30}
31
32define internal i32 @inalloca(ptr inalloca(i32) %p) {
33; CHECK-LABEL: define internal fastcc i32 @inalloca(ptr %p)
34  %rv = load i32, ptr %p
35  ret i32 %rv
36}
37
38define i32 @inalloca2_caller(ptr inalloca(i32) %p) {
39  %rv = musttail call i32 @inalloca2(ptr inalloca(i32) %p)
40  ret i32 %rv
41}
42define internal i32 @inalloca2(ptr inalloca(i32) %p) {
43; Because of the musttail caller, this inalloca cannot be dropped.
44; CHECK-LABEL: define internal i32 @inalloca2(ptr inalloca(i32) %p)
45  %rv = load i32, ptr %p
46  ret i32 %rv
47}
48
49define internal i32 @preallocated(ptr preallocated(i32) %p) {
50; CHECK-LABEL: define internal fastcc i32 @preallocated(ptr %p)
51  %rv = load i32, ptr %p
52  ret i32 %rv
53}
54
55define void @call_things() {
56  %m = alloca i32
57  call i32 @f(ptr %m)
58  call x86_thiscallcc i32 @g(ptr %m)
59  call coldcc i32 @h(ptr %m)
60  call i32 @j(ptr %m)
61  %args = alloca inalloca i32
62  call i32 @inalloca(ptr inalloca(i32) %args)
63  %c = call token @llvm.call.preallocated.setup(i32 1)
64  %N = call ptr @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
65  call i32 @preallocated(ptr preallocated(i32) %N) ["preallocated"(token %c)]
66  ret void
67}
68; CHECK-LABEL: define void @call_things()
69; CHECK: call fastcc i32 @f
70; CHECK: call fastcc i32 @g
71; CHECK: call coldcc i32 @h
72; CHECK: call i32 @j
73; CHECK: call fastcc i32 @inalloca(ptr %args)
74; CHECK-NOT: llvm.call.preallocated
75; CHECK: call fastcc i32 @preallocated(ptr %paarg)
76
77@llvm.used = appending global [1 x ptr] [
78   ptr @j
79], section "llvm.metadata"
80