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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  ; CHECK-NOT: ori     {{r[0-9]+}}, 0
44
45  ; CHECK-NEXT: out     4, [[TMPREG]]
46  ; CHECK-NEXT: ret
47
48  %0 = load volatile i8, i8* inttoptr (i16 36 to i8*), align 1
49  %conv = zext i8 %0 to i16
50  %or = or i16 %conv, 32
51  %conv1 = trunc i16 %or to i8
52  store volatile i8 %conv1, i8* inttoptr (i16 36 to i8*), align 1
53  ret void
54}
55
56; Turns on the LED.
57; CHECK-LABEL: turn_on
58define void @turn_on() {
59entry:
60
61  ; This should load the value of PORTB, OR it with the bit number and store
62  ; the result back to DDRB.
63
64  ; CHECK:      in      [[TMPREG:r[0-9]+]], 5
65  ; CHECK-NEXT: ori     [[TMPREG]], 32
66
67  ; CHECK-NOT: ori     {{r[0-9]+}}, 0
68
69  ; CHECK-NEXT: out     5, [[TMPREG]]
70  ; CHECK-NEXT: ret
71
72  %0 = load volatile i8, i8* inttoptr (i16 37 to i8*), align 1
73  %conv = zext i8 %0 to i16
74  %or = or i16 %conv, 32
75  %conv1 = trunc i16 %or to i8
76  store volatile i8 %conv1, i8* inttoptr (i16 37 to i8*), align 1
77  ret void
78}
79
80; Turns off the LED.
81; CHECK-LABEL: turn_off
82define void @turn_off() {
83entry:
84
85  ; This should load the value of PORTB, OR it with the bit number and store
86  ; the result back to DDRB.
87
88
89  ; CHECK:      in      [[TMPREG:r[0-9]+]], 5
90  ; CHECK-NEXT: andi    [[TMPREG]], 223
91  ; CHECK-NEXT: andi    {{r[0-9]+}}, 0
92  ; CHECK-NEXT: out     5, [[TMPREG]]
93  ; CHECK-NEXT: ret
94
95  %0 = load volatile i8, i8* inttoptr (i16 37 to i8*), align 1
96  %conv = zext i8 %0 to i16
97  %and = and i16 %conv, -33
98  %conv1 = trunc i16 %and to i8
99  store volatile i8 %conv1, i8* inttoptr (i16 37 to i8*), align 1
100  ret void
101}
102
103; CHECK-LABEL: main
104define i16 @main() {
105entry:
106
107  ; CHECK: call setup_ddr
108  call void @setup_ddr()
109
110  br label %while.body
111
112; CHECK-LABEL: LBB3_1
113while.body:
114
115  ; CHECK: call turn_on
116  call void @turn_on()
117
118  ; CHECK-NEXT: call turn_off
119  call void @turn_off()
120
121  ; CHECK-NEXT: rjmp LBB3_1
122  br label %while.body
123}
124