xref: /llvm-project/llvm/test/CodeGen/ARM/struct_byval.ll (revision d24ab20e9b11d2076d8b9d5cd96f41a6b9c399fb)
1; RUN: llc < %s -mtriple=armv7-apple-ios6.0 | FileCheck %s
2
3; rdar://9877866
4%struct.SmallStruct = type { i32, [8 x i32], [37 x i8] }
5%struct.LargeStruct = type { i32, [1001 x i8], [300 x i32] }
6
7define i32 @f() nounwind ssp {
8entry:
9; CHECK-LABEL: f:
10; CHECK: ldr
11; CHECK: str
12; CHECK-NOT:bne
13  %st = alloca %struct.SmallStruct, align 4
14  %call = call i32 @e1(%struct.SmallStruct* byval %st)
15  ret i32 0
16}
17
18; Generate a loop for large struct byval
19define i32 @g() nounwind ssp {
20entry:
21; CHECK-LABEL: g:
22; CHECK: ldr
23; CHECK: sub
24; CHECK: str
25; CHECK: bne
26  %st = alloca %struct.LargeStruct, align 4
27  %call = call i32 @e2(%struct.LargeStruct* byval %st)
28  ret i32 0
29}
30
31; Generate a loop using NEON instructions
32define i32 @h() nounwind ssp {
33entry:
34; CHECK-LABEL: h:
35; CHECK: vld1
36; CHECK: sub
37; CHECK: vst1
38; CHECK: bne
39  %st = alloca %struct.LargeStruct, align 16
40  %call = call i32 @e3(%struct.LargeStruct* byval align 16 %st)
41  ret i32 0
42}
43
44declare i32 @e1(%struct.SmallStruct* nocapture byval %in) nounwind
45declare i32 @e2(%struct.LargeStruct* nocapture byval %in) nounwind
46declare i32 @e3(%struct.LargeStruct* nocapture byval align 16 %in) nounwind
47
48; rdar://12442472
49; We can't do tail call since address of s is passed to the callee and part of
50; s is in caller's local frame.
51define void @f3(%struct.SmallStruct* nocapture byval %s) nounwind optsize {
52; CHECK: f3
53; CHECK: bl _consumestruct
54entry:
55  %0 = bitcast %struct.SmallStruct* %s to i8*
56  tail call void @consumestruct(i8* %0, i32 80) optsize
57  ret void
58}
59
60define void @f4(%struct.SmallStruct* nocapture byval %s) nounwind optsize {
61; CHECK: f4
62; CHECK: bl _consumestruct
63entry:
64  %addr = getelementptr inbounds %struct.SmallStruct* %s, i32 0, i32 0
65  %0 = bitcast i32* %addr to i8*
66  tail call void @consumestruct(i8* %0, i32 80) optsize
67  ret void
68}
69
70; We can do tail call here since s is in the incoming argument area.
71define void @f5(i32 %a, i32 %b, i32 %c, i32 %d, %struct.SmallStruct* nocapture byval %s) nounwind optsize {
72; CHECK: f5
73; CHECK: b _consumestruct
74entry:
75  %0 = bitcast %struct.SmallStruct* %s to i8*
76  tail call void @consumestruct(i8* %0, i32 80) optsize
77  ret void
78}
79
80define void @f6(i32 %a, i32 %b, i32 %c, i32 %d, %struct.SmallStruct* nocapture byval %s) nounwind optsize {
81; CHECK: f6
82; CHECK: b _consumestruct
83entry:
84  %addr = getelementptr inbounds %struct.SmallStruct* %s, i32 0, i32 0
85  %0 = bitcast i32* %addr to i8*
86  tail call void @consumestruct(i8* %0, i32 80) optsize
87  ret void
88}
89
90declare void @consumestruct(i8* nocapture %structp, i32 %structsize) nounwind
91