| Dylan McKay | c1ff65c | 2016-10-08 01:01:49 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=avr | FileCheck %s |
| 2 | |
| 3 | define i1 @signed_multiplication_did_overflow(i8, i8) unnamed_addr { |
| 4 | ; CHECK-LABEL: signed_multiplication_did_overflow: |
| 5 | entry-block: |
| 6 | %2 = tail call { i8, i1 } @llvm.smul.with.overflow.i8(i8 %0, i8 %1) |
| 7 | %3 = extractvalue { i8, i1 } %2, 1 |
| 8 | ret i1 %3 |
| 9 | |
| 10 | ; Multiply, fill the low byte with the sign of the low byte via |
| 11 | ; arithmetic shifting, compare it to the high byte. |
| 12 | ; |
| 13 | ; CHECK: muls r24, r22 |
| 14 | ; CHECK: mov [[HIGH:r[0-9]+]], r1 |
| 15 | ; CHECK: mov [[LOW:r[0-9]+]], r0 |
| 16 | ; CHECK: asr {{.*}}[[LOW]] |
| 17 | ; CHECK: asr {{.*}}[[LOW]] |
| 18 | ; CHECK: asr {{.*}}[[LOW]] |
| 19 | ; CHECK: asr {{.*}}[[LOW]] |
| 20 | ; CHECK: asr {{.*}}[[LOW]] |
| 21 | ; CHECK: asr {{.*}}[[LOW]] |
| 22 | ; CHECK: asr {{.*}}[[LOW]] |
| 23 | ; CHECK: ldi [[RET:r[0-9]+]], 1 |
| 24 | ; CHECK: cp {{.*}}[[HIGH]], {{.*}}[[LOW]] |
| 25 | ; CHECK: brne [[LABEL:LBB[_0-9]+]] |
| 26 | ; CHECK: ldi {{.*}}[[RET]], 0 |
| 27 | ; CHECK: {{.*}}[[LABEL]] |
| 28 | ; CHECK: ret |
| 29 | } |
| 30 | |
| 31 | declare { i8, i1 } @llvm.smul.with.overflow.i8(i8, i8) |