1; RUN: llc -mattr=avr6,sram < %s -mtriple=avr | FileCheck %s 2 3; This file tests whether the compiler correctly works with the r1 register, 4; clearing it when needed. 5 6; Test regular use of r1 as a zero register. 7; CHECK-LABEL: store8zero: 8; CHECK: st {{[XYZ]}}, r1 9; CHECK-NEXT: mov r24, r1 10; CHECK-NEXT: ret 11define i8 @store8zero(ptr %x) { 12 store i8 0, ptr %x 13 ret i8 0 14} 15 16; Test that mulitplication instructions (mul, muls, etc) clobber r1 and require 17; a "clr r1" instruction. 18; CHECK-LABEL: mul: 19; CHECK: muls 20; CHECK-NEXT: clr r1 21; CHECK-NEXT: st {{[XYZ]}}, r0 22; CHECK-NEXT: ret 23define void @mul(ptr %ptr, i8 %n) { 24 %result = mul i8 %n, 3 25 store i8 %result, ptr %ptr 26 ret void 27} 28