1; RUN: llc < %s -asm-verbose=false | FileCheck %s
2
3; Test that the "returned" attribute is optimized effectively.
4
5target datalayout = "e-p:32:32-i64:64-n32:64-S128"
6target triple = "wasm32-unknown-unknown"
7
8; CHECK-LABEL: _Z3foov:
9; CHECK-NEXT: .result   i32{{$}}
10; CHECK-NEXT: i32.const $push0=, 1{{$}}
11; CHECK-NEXT: {{^}} i32.call      $push1=, _Znwm, $pop0{{$}}
12; CHECK-NEXT: {{^}} i32.call      $push2=, _ZN5AppleC1Ev, $pop1{{$}}
13; CHECK-NEXT: return    $pop2{{$}}
14%class.Apple = type { i8 }
15declare noalias i8* @_Znwm(i32)
16declare %class.Apple* @_ZN5AppleC1Ev(%class.Apple* returned)
17define %class.Apple* @_Z3foov() {
18entry:
19  %call = tail call noalias i8* @_Znwm(i32 1)
20  %0 = bitcast i8* %call to %class.Apple*
21  %call1 = tail call %class.Apple* @_ZN5AppleC1Ev(%class.Apple* %0)
22  ret %class.Apple* %0
23}
24
25; CHECK-LABEL: _Z3barPvS_l:
26; CHECK-NEXT: .param   i32, i32, i32{{$}}
27; CHECK-NEXT: .result  i32{{$}}
28; CHECK-NEXT: {{^}} i32.call     $push0=, memcpy, $0, $1, $2{{$}}
29; CHECK-NEXT: return   $pop0{{$}}
30declare i8* @memcpy(i8* returned, i8*, i32)
31define i8* @_Z3barPvS_l(i8* %p, i8* %s, i32 %n) {
32entry:
33  %call = tail call i8* @memcpy(i8* %p, i8* %s, i32 %n)
34  ret i8* %p
35}
36
37; Test that the optimization isn't performed on constant arguments.
38
39; CHECK-LABEL: test_constant_arg:
40; CHECK-NEXT: i32.const   $push0=, global{{$}}
41; CHECK-NEXT: {{^}} i32.call        $discard=, returns_arg, $pop0{{$}}
42; CHECK-NEXT: return{{$}}
43@global = external global i32
44@addr = global i32* @global
45define void @test_constant_arg() {
46  %call = call i32* @returns_arg(i32* @global)
47  ret void
48}
49declare i32* @returns_arg(i32* returned)
50