| ; RUN: llc -mattr=avr6 < %s -march=avr | FileCheck %s |
| |
| define i1 @signed_multiplication_did_overflow(i8, i8) unnamed_addr { |
| ; CHECK-LABEL: signed_multiplication_did_overflow: |
| entry-block: |
| %2 = tail call { i8, i1 } @llvm.smul.with.overflow.i8(i8 %0, i8 %1) |
| %3 = extractvalue { i8, i1 } %2, 1 |
| ret i1 %3 |
| |
| ; Multiply, fill the low byte with the sign of the low byte via |
| ; arithmetic shifting, compare it to the high byte. |
| ; |
| ; CHECK: muls r24, r22 |
| ; CHECK: mov [[HIGH:r[0-9]+]], r1 |
| ; CHECK: mov [[LOW:r[0-9]+]], r0 |
| ; CHECK: asr {{.*}}[[LOW]] |
| ; CHECK: asr {{.*}}[[LOW]] |
| ; CHECK: asr {{.*}}[[LOW]] |
| ; CHECK: asr {{.*}}[[LOW]] |
| ; CHECK: asr {{.*}}[[LOW]] |
| ; CHECK: asr {{.*}}[[LOW]] |
| ; CHECK: asr {{.*}}[[LOW]] |
| ; CHECK: ldi [[RET:r[0-9]+]], 1 |
| ; CHECK: cp {{.*}}[[HIGH]], {{.*}}[[LOW]] |
| ; CHECK: brne [[LABEL:LBB[_0-9]+]] |
| ; CHECK: ldi {{.*}}[[RET]], 0 |
| ; CHECK: {{.*}}[[LABEL]] |
| ; CHECK: ret |
| } |
| |
| declare { i8, i1 } @llvm.smul.with.overflow.i8(i8, i8) |
