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