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1; RUN: llc -mattr=avr6,sram < %s -mtriple=avr | FileCheck %s2 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]}}, r19; CHECK-NEXT: mov r24, r110; CHECK-NEXT: ret11define i8 @store8zero(ptr %x) {12 store i8 0, ptr %x13 ret i8 014}15 16; Test that mulitplication instructions (mul, muls, etc) clobber r1 and require17; a "clr r1" instruction.18; CHECK-LABEL: mul:19; CHECK: muls20; CHECK-NEXT: clr r121; CHECK-NEXT: st {{[XYZ]}}, r022; CHECK-NEXT: ret23define void @mul(ptr %ptr, i8 %n) {24 %result = mul i8 %n, 325 store i8 %result, ptr %ptr26 ret void27}28