forked from OSchip/llvm-project
104 lines
2.0 KiB
LLVM
104 lines
2.0 KiB
LLVM
; RUN: llc < %s -march=avr -mcpu=atmega328p | FileCheck %s
|
|
|
|
; This test checks a basic 'blinking led' program.
|
|
; It is written for the ATmega328P
|
|
|
|
; Derived from the following C program (with some cleanups):
|
|
; #include <avr/io.h>
|
|
;
|
|
; void setup_ddr() {
|
|
; DDRB |= _BV(PB5);
|
|
; }
|
|
;
|
|
; void turn_on() {
|
|
; PORTB |= _BV(PB5);
|
|
; }
|
|
;
|
|
; void turn_off() {
|
|
; PORTB &= ~_BV(PB5);
|
|
; }
|
|
;
|
|
; int main() {
|
|
; setup_ddr();
|
|
;
|
|
; while(1) {
|
|
; turn_on();
|
|
; turn_off();
|
|
; }
|
|
;
|
|
; return 0;
|
|
; }
|
|
|
|
; Sets up the data direction register.
|
|
; CHECK-LABEL: setup_ddr
|
|
define void @setup_ddr() {
|
|
entry:
|
|
|
|
; This should set the 5th bit of DDRB.
|
|
; CHECK: sbi 4, 5
|
|
; CHECK-NEXT: ret
|
|
|
|
%0 = load volatile i8, i8* inttoptr (i16 36 to i8*), align 1
|
|
%conv = zext i8 %0 to i16
|
|
%or = or i16 %conv, 32
|
|
%conv1 = trunc i16 %or to i8
|
|
store volatile i8 %conv1, i8* inttoptr (i16 36 to i8*), align 1
|
|
ret void
|
|
}
|
|
|
|
; Turns on the LED.
|
|
; CHECK-LABEL: turn_on
|
|
define void @turn_on() {
|
|
entry:
|
|
|
|
; This should set the 5th bit of PORTB
|
|
; CHECK: sbi 5, 5
|
|
; CHECK-NEXT: ret
|
|
|
|
%0 = load volatile i8, i8* inttoptr (i16 37 to i8*), align 1
|
|
%conv = zext i8 %0 to i16
|
|
%or = or i16 %conv, 32
|
|
%conv1 = trunc i16 %or to i8
|
|
store volatile i8 %conv1, i8* inttoptr (i16 37 to i8*), align 1
|
|
ret void
|
|
}
|
|
|
|
; Turns off the LED.
|
|
; CHECK-LABEL: turn_off
|
|
define void @turn_off() {
|
|
entry:
|
|
|
|
; This should clear the 5th bit of PORTB
|
|
; CHECK: cbi 5, 5
|
|
; CHECK-NEXT: ret
|
|
|
|
%0 = load volatile i8, i8* inttoptr (i16 37 to i8*), align 1
|
|
%conv = zext i8 %0 to i16
|
|
%and = and i16 %conv, -33
|
|
%conv1 = trunc i16 %and to i8
|
|
store volatile i8 %conv1, i8* inttoptr (i16 37 to i8*), align 1
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: main
|
|
define i16 @main() {
|
|
entry:
|
|
|
|
; CHECK: call setup_ddr
|
|
call void @setup_ddr()
|
|
|
|
br label %while.body
|
|
|
|
; CHECK-LABEL: .LBB3_1
|
|
while.body:
|
|
|
|
; CHECK: call turn_on
|
|
call void @turn_on()
|
|
|
|
; CHECK-NEXT: call turn_off
|
|
call void @turn_off()
|
|
|
|
; CHECK-NEXT: rjmp .LBB3_1
|
|
br label %while.body
|
|
}
|