1; RUN: llc < %s -asm-verbose=false -verify-machineinstrs | FileCheck %s
2
3; Test varargs constructs.
4
5target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
6target triple = "wasm32-unknown-unknown"
7
8; Test va_start.
9
10; TODO: Test va_start.
11
12;define void @start(i8** %ap, ...) {
13;entry:
14;  %0 = bitcast i8** %ap to i8*
15;  call void @llvm.va_start(i8* %0)
16;  ret void
17;}
18
19; Test va_end.
20
21; CHECK-LABEL: end:
22; CHECK-NEXT: .param i32{{$}}
23; CHECK-NEXT: return{{$}}
24define void @end(i8** %ap) {
25entry:
26  %0 = bitcast i8** %ap to i8*
27  call void @llvm.va_end(i8* %0)
28  ret void
29}
30
31; Test va_copy.
32
33; CHECK-LABEL: copy:
34; CHECK-NEXT: .param i32, i32{{$}}
35; CHECK-NEXT: i32.load  $push0=, 0($1){{$}}
36; CHECK-NEXT: i32.store $discard=, 0($0), $pop0{{$}}
37; CHECK-NEXT: return{{$}}
38define void @copy(i8** %ap, i8** %bp) {
39entry:
40  %0 = bitcast i8** %ap to i8*
41  %1 = bitcast i8** %bp to i8*
42  call void @llvm.va_copy(i8* %0, i8* %1)
43  ret void
44}
45
46; Test va_arg with an i8 argument.
47
48; CHECK-LABEL: arg_i8:
49; CHECK-NEXT: .param     i32{{$}}
50; CHECK-NEXT: .result    i32{{$}}
51; CHECK-NEXT: .local     i32{{$}}
52; CHECK-NEXT: i32.load   $push0=, 0($0){{$}}
53; CHECK-NEXT: tee_local  $push4=, $1=, $pop0{{$}}
54; CHECK-NEXT: i32.const  $push1=, 4{{$}}
55; CHECK-NEXT: i32.add    $push2=, $pop4, $pop1{{$}}
56; CHECK-NEXT: i32.store  $discard=, 0($0), $pop2{{$}}
57; CHECK-NEXT: i32.load   $push3=, 0($1){{$}}
58; CHECK-NEXT: return     $pop3{{$}}
59define i8 @arg_i8(i8** %ap) {
60entry:
61  %t = va_arg i8** %ap, i8
62  ret i8 %t
63}
64
65; Test va_arg with an i32 argument.
66
67; CHECK-LABEL: arg_i32:
68; CHECK-NEXT: .param     i32{{$}}
69; CHECK-NEXT: .result    i32{{$}}
70; CHECK-NEXT: .local     i32{{$}}
71; CHECK-NEXT: i32.load   $push0=, 0($0){{$}}
72; CHECK-NEXT: i32.const  $push1=, 3{{$}}
73; CHECK-NEXT: i32.add    $push2=, $pop0, $pop1{{$}}
74; CHECK-NEXT: i32.const  $push3=, -4{{$}}
75; CHECK-NEXT: i32.and    $push4=, $pop2, $pop3{{$}}
76; CHECK-NEXT: tee_local  $push8=, $1=, $pop4{{$}}
77; CHECK-NEXT: i32.const  $push5=, 4{{$}}
78; CHECK-NEXT: i32.add    $push6=, $pop8, $pop5{{$}}
79; CHECK-NEXT: i32.store  $discard=, 0($0), $pop6{{$}}
80; CHECK-NEXT: i32.load   $push7=, 0($1){{$}}
81; CHECK-NEXT: return     $pop7{{$}}
82define i32 @arg_i32(i8** %ap) {
83entry:
84  %t = va_arg i8** %ap, i32
85  ret i32 %t
86}
87
88; Test va_arg with an i128 argument.
89
90; CHECK-LABEL: arg_i128:
91; CHECK-NEXT: .param i32, i32{{$}}
92; CHECK-NEXT: .local
93; CHECK: i32.and
94; CHECK: i64.load
95; CHECK: i64.load
96; CHECK: return{{$}}
97define i128 @arg_i128(i8** %ap) {
98entry:
99  %t = va_arg i8** %ap, i128
100  ret i128 %t
101}
102
103; Test a varargs call with no actual arguments.
104
105declare void @callee(...)
106
107; CHECK-LABEL: caller_none:
108; CHECK-NEXT: call callee@FUNCTION{{$}}
109; CHECK-NEXT: return{{$}}
110define void @caller_none() {
111  call void (...) @callee()
112  ret void
113}
114
115; Test a varargs call with some actual arguments.
116; Note that the store of 2.0 is converted to an i64 store; this optimization
117; is not needed on WebAssembly, but there isn't currently a convenient hook for
118; disabling it.
119
120; CHECK-LABEL: caller_some
121; CHECK: i32.store
122; CHECK: i64.store
123define void @caller_some() {
124  call void (...) @callee(i32 0, double 2.0)
125  ret void
126}
127
128declare void @llvm.va_start(i8*)
129declare void @llvm.va_end(i8*)
130declare void @llvm.va_copy(i8*, i8*)
131