1; RUN: opt -inline %s -S | FileCheck %s
2
3target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
4target triple = "thumbv7m-arm-none-eabi"
5
6; CHECK-LABEL: define void @matcpy
7define void @matcpy(i8* %dest, i8* %source, i32 %num) #0 {
8entry:
9  %0 = ptrtoint i8* %dest to i32
10  %1 = ptrtoint i8* %source to i32
11  %2 = xor i32 %0, %1
12  %3 = and i32 %2, 3
13  %cmp = icmp eq i32 %3, 0
14  br i1 %cmp, label %if.then, label %if.else20
15
16if.then:                                          ; preds = %entry
17  %sub = sub i32 0, %0
18  %and2 = and i32 %sub, 3
19  %add = or i32 %and2, 4
20  %cmp3 = icmp ugt i32 %add, %num
21  br i1 %cmp3, label %if.else, label %if.then4
22
23if.then4:                                         ; preds = %if.then
24  %sub5 = sub i32 %num, %and2
25  %shr = and i32 %sub5, -4
26  %sub7 = sub i32 %sub5, %shr
27  %tobool = icmp eq i32 %and2, 0
28  br i1 %tobool, label %if.end, label %if.then8
29
30if.then8:                                         ; preds = %if.then4
31; CHECK: call fastcc void @memcpy
32  call fastcc void @memcpy(i8* %dest, i8* %source, i32 %and2) #0
33  %add.ptr = getelementptr inbounds i8, i8* %dest, i32 %and2
34  %add.ptr9 = getelementptr inbounds i8, i8* %source, i32 %and2
35  br label %if.end
36
37if.end:                                           ; preds = %if.then4, %if.then8
38  %p_dest.0 = phi i8* [ %add.ptr, %if.then8 ], [ %dest, %if.then4 ]
39  %p_source.0 = phi i8* [ %add.ptr9, %if.then8 ], [ %source, %if.then4 ]
40  %tobool14 = icmp eq i32 %sub7, 0
41  br i1 %tobool14, label %if.end22, label %if.then15
42
43if.then15:                                        ; preds = %if.end
44  %add.ptr13 = getelementptr inbounds i8, i8* %p_source.0, i32 %shr
45  %add.ptr11 = getelementptr inbounds i8, i8* %p_dest.0, i32 %shr
46; CHECK: call fastcc void @memcpy
47  call fastcc void @memcpy(i8* %add.ptr11, i8* %add.ptr13, i32 %sub7) #0
48  br label %if.end22
49
50if.else:                                          ; preds = %if.then
51  call fastcc void @memcpy(i8* %dest, i8* %source, i32 %num) #0
52  br label %if.end22
53
54if.else20:                                        ; preds = %entry
55  call fastcc void @memcpy(i8* %dest, i8* %source, i32 %num) #0
56  br label %if.end22
57
58if.end22:                                         ; preds = %if.then15, %if.end, %if.else, %if.else20
59  ret void
60}
61
62; CHECK-LABEL: define internal void @memcpy
63define internal void @memcpy(i8* nocapture %dest, i8* nocapture readonly %source, i32 %num) #0 {
64entry:
65  br label %while.cond
66
67while.cond:                                       ; preds = %while.body, %entry
68  %num.addr.0 = phi i32 [ %num, %entry ], [ %dec, %while.body ]
69  %p_dest.0 = phi i8* [ %dest, %entry ], [ %incdec.ptr1, %while.body ]
70  %p_source.0 = phi i8* [ %source, %entry ], [ %incdec.ptr, %while.body ]
71  %cmp = icmp eq i32 %num.addr.0, 0
72  br i1 %cmp, label %while.end, label %while.body
73
74while.body:                                       ; preds = %while.cond
75  %incdec.ptr = getelementptr inbounds i8, i8* %p_source.0, i32 1
76  %0 = load i8, i8* %p_source.0, align 1
77  %incdec.ptr1 = getelementptr inbounds i8, i8* %p_dest.0, i32 1
78  store i8 %0, i8* %p_dest.0, align 1
79  %dec = add i32 %num.addr.0, -1
80  br label %while.cond
81
82while.end:                                        ; preds = %while.cond
83  ret void
84}
85
86attributes #0 = { minsize optsize }
87
88