| Dylan McKay | 9701c42 | 2016-11-16 22:38:43 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -march=avr | FileCheck %s |
| 2 | |
| 3 | define i8 @count_leading_zeros(i8) unnamed_addr { |
| 4 | entry-block: |
| 5 | %1 = tail call i8 @llvm.ctlz.i8(i8 %0) |
| 6 | ret i8 %1 |
| 7 | } |
| 8 | |
| 9 | declare i8 @llvm.ctlz.i8(i8) |
| 10 | |
| 11 | ; CHECK-LABEL: count_leading_zeros: |
| 12 | ; CHECK: cpi [[RESULT:r[0-9]+]], 0 |
| 13 | ; CHECK: breq LBB0_2 |
| 14 | ; CHECK: mov [[SCRATCH:r[0-9]+]], {{.*}}[[RESULT]] |
| 15 | ; CHECK: lsr {{.*}}[[SCRATCH]] |
| 16 | ; CHECK: or {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] |
| 17 | ; CHECK: mov {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] |
| 18 | ; CHECK: lsr {{.*}}[[RESULT]] |
| 19 | ; CHECK: lsr {{.*}}[[RESULT]] |
| 20 | ; CHECK: or {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] |
| 21 | ; CHECK: mov {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] |
| 22 | ; CHECK: lsr {{.*}}[[SCRATCH]] |
| 23 | ; CHECK: lsr {{.*}}[[SCRATCH]] |
| 24 | ; CHECK: lsr {{.*}}[[SCRATCH]] |
| 25 | ; CHECK: lsr {{.*}}[[SCRATCH]] |
| 26 | ; CHECK: or {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] |
| 27 | ; CHECK: com {{.*}}[[SCRATCH]] |
| 28 | ; CHECK: mov {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] |
| 29 | ; CHECK: lsr {{.*}}[[RESULT]] |
| 30 | ; CHECK: andi {{.*}}[[RESULT]], 85 |
| 31 | ; CHECK: sub {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] |
| 32 | ; CHECK: mov {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] |
| 33 | ; CHECK: andi {{.*}}[[RESULT]], 51 |
| 34 | ; CHECK: lsr {{.*}}[[SCRATCH]] |
| 35 | ; CHECK: lsr {{.*}}[[SCRATCH]] |
| 36 | ; CHECK: andi {{.*}}[[SCRATCH]], 51 |
| 37 | ; CHECK: add {{.*}}[[SCRATCH]], {{.*}}[[RESULT]] |
| 38 | ; CHECK: mov {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] |
| 39 | ; CHECK: lsr {{.*}}[[RESULT]] |
| 40 | ; CHECK: lsr {{.*}}[[RESULT]] |
| 41 | ; CHECK: lsr {{.*}}[[RESULT]] |
| 42 | ; CHECK: lsr {{.*}}[[RESULT]] |
| 43 | ; CHECK: add {{.*}}[[RESULT]], {{.*}}[[SCRATCH]] |
| 44 | ; CHECK: andi {{.*}}[[RESULT]], 15 |
| 45 | ; CHECK: ret |
| 46 | ; CHECK: LBB0_2: |
| 47 | ; CHECK: ldi {{.*}}[[RESULT]], 8 |
| 48 | ; CHECK: ret |