1; RUN: llc < %s -mtriple=avr | FileCheck %s 2 3define i8 @count_trailing_zeros(i8) unnamed_addr { 4entry-block: 5 %1 = tail call i8 @llvm.cttz.i8(i8 %0) 6 ret i8 %1 7} 8 9declare i8 @llvm.cttz.i8(i8) 10 11; CHECK-LABEL: count_trailing_zeros: 12; CHECK: cpi [[RESULT:r[0-9]+]], 0 13; CHECK: breq [[END_BB:.LBB[0-9]+_[0-9]+]] 14; CHECK: mov [[SCRATCH:r[0-9]+]], {{.*}}[[RESULT]] 15; CHECK: dec {{.*}}[[SCRATCH]] 16; CHECK: com {{.*}}[[RESULT]] 17; CHECK: and {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] 18; CHECK: mov {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] 19; CHECK: lsr {{.*}}[[SCRATCH]] 20; CHECK: andi {{.*}}[[SCRATCH]], 85 21; CHECK: sub {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] 22; CHECK: mov {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] 23; CHECK: andi {{.*}}[[SCRATCH]], 51 24; CHECK: lsr {{.*}}[[RESULT]] 25; CHECK: lsr {{.*}}[[RESULT]] 26; CHECK: andi {{.*}}[[RESULT]], 51 27; CHECK: add {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] 28; CHECK: mov {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] 29; CHECK: swap {{.*}}[[SCRATCH]] 30; CHECK: add {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] 31; CHECK: mov {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] 32; CHECK: andi {{.*}}[[RESULT]], 15 33; CHECK: ret 34; CHECK: [[END_BB]]: 35; CHECK: ldi {{.*}}[[RESULT]], 8 36; CHECK: ret 37