1; RUN: llc < %s -march=avr -mcpu=atmega328p | FileCheck %s
2
3; This test checks a basic 'blinking led' program.
4; It is written for the ATmega328P
5
6; Derived from the following C program (with some cleanups):
7; #include <avr/io.h>
8;
9; void setup_ddr() {
10;   DDRB |= _BV(PB5);
11; }
12;
13; void turn_on() {
14;   PORTB |= _BV(PB5);
15; }
16;
17; void turn_off() {
18;   PORTB &= ~_BV(PB5);
19; }
20;
21; int main() {
22;   setup_ddr();
23;
24;   while(1) {
25;     turn_on();
26;     turn_off();
27;   }
28;
29;   return 0;
30; }
31
32; Sets up the data direction register.
33; CHECK-LABEL: setup_ddr
34define void @setup_ddr() {
35entry:
36
37  ; This should load the value of DDRB, OR it with the bit number and store
38  ; the result back to DDRB.
39
40  ; CHECK:      in      [[TMPREG:r[0-9]+]], 4
41  ; CHECK-NEXT: ori     [[TMPREG]], 32
42
43  ; This next line is unnecessary, but we CodeGen it anyway. We should probably optimize this out (PR31344).
44  ; CHECK-NEXT: ori     {{r[0-9]+}}, 0
45
46  ; CHECK-NEXT: out     4, [[TMPREG]]
47  ; CHECK-NEXT: ret
48
49  %0 = load volatile i8, i8* inttoptr (i16 36 to i8*), align 1
50  %conv = zext i8 %0 to i16
51  %or = or i16 %conv, 32
52  %conv1 = trunc i16 %or to i8
53  store volatile i8 %conv1, i8* inttoptr (i16 36 to i8*), align 1
54  ret void
55}
56
57; Turns on the LED.
58; CHECK-LABEL: turn_on
59define void @turn_on() {
60entry:
61
62  ; This should load the value of PORTB, OR it with the bit number and store
63  ; the result back to DDRB.
64
65  ; CHECK:      in      [[TMPREG:r[0-9]+]], 5
66  ; CHECK-NEXT: ori     [[TMPREG]], 32
67
68  ; This next line is unnecessary, but we CodeGen it anyway. We should probably optimize this out (PR31344).
69  ; CHECK-NEXT: ori     {{r[0-9]+}}, 0
70
71  ; CHECK-NEXT: out     5, [[TMPREG]]
72  ; CHECK-NEXT: ret
73
74  %0 = load volatile i8, i8* inttoptr (i16 37 to i8*), align 1
75  %conv = zext i8 %0 to i16
76  %or = or i16 %conv, 32
77  %conv1 = trunc i16 %or to i8
78  store volatile i8 %conv1, i8* inttoptr (i16 37 to i8*), align 1
79  ret void
80}
81
82; Turns off the LED.
83; CHECK-LABEL: turn_off
84define void @turn_off() {
85entry:
86
87  ; This should load the value of PORTB, OR it with the bit number and store
88  ; the result back to DDRB.
89
90
91  ; CHECK:      in      [[TMPREG:r[0-9]+]], 5
92  ; CHECK-NEXT: andi    [[TMPREG]], 223
93  ; CHECK-NEXT: andi    {{r[0-9]+}}, 0
94  ; CHECK-NEXT: out     5, [[TMPREG]]
95  ; CHECK-NEXT: ret
96
97  %0 = load volatile i8, i8* inttoptr (i16 37 to i8*), align 1
98  %conv = zext i8 %0 to i16
99  %and = and i16 %conv, -33
100  %conv1 = trunc i16 %and to i8
101  store volatile i8 %conv1, i8* inttoptr (i16 37 to i8*), align 1
102  ret void
103}
104
105; CHECK-LABEL: main
106define i16 @main() {
107entry:
108
109  ; CHECK: call setup_ddr
110  call void @setup_ddr()
111
112  br label %while.body
113
114; CHECK-LABEL: LBB3_1
115while.body:
116
117  ; CHECK: call turn_on
118  call void @turn_on()
119
120  ; CHECK-NEXT: call turn_off
121  call void @turn_off()
122
123  ; CHECK-NEXT: rjmp LBB3_1
124  br label %while.body
125}
126