| ; RUN: llc < %s -march=avr | FileCheck %s |
| ; RUN: llc < %s -march=avr -mcpu=avr5 | FileCheck -check-prefix=AVR5 %s |
| |
| ; CHECK-LABEL: relax_breq |
| ; CHECK: cpi r{{[0-9]+}}, 0 |
| ; CHECK: brne .LBB0_1 |
| ; CHECK: rjmp .LBB0_2 |
| ; CHECK: .LBB0_1: |
| ; CHECK: nop |
| ; CHECK: .LBB0_2: |
| |
| ; AVR5-LABEL: relax_breq |
| ; AVR5: andi r24, 1 |
| ; AVR5: cpi r24, 0 |
| ; AVR5: brne .LBB0_1 |
| ; AVR5: rjmp .LBB0_2 |
| ; AVR5: .LBB0_1: |
| ; AVR5: nop |
| ; AVR5: .LBB0_2: |
| |
| define i8 @relax_breq(i1 %a) { |
| entry-block: |
| br i1 %a, label %hello, label %finished |
| |
| hello: |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| br label %finished |
| finished: |
| ret i8 3 |
| } |
| |
| ; CHECK-LABEL: no_relax_breq |
| ; CHECK: cpi r{{[0-9]+}}, 0 |
| ; CHECK: breq [[END_BB:.LBB[0-9]+_[0-9]+]] |
| ; CHECK: nop |
| ; CHECK: [[END_BB]] |
| |
| ; AVR5-LABEL: no_relax_breq |
| ; AVR5: cpi r{{[0-9]+}}, 0 |
| ; AVR5: breq [[END_BB:.LBB[0-9]+_[0-9]+]] |
| ; AVR5: nop |
| ; AVR5: [[END_BB]] |
| |
| define i8 @no_relax_breq(i1 %a) { |
| entry-block: |
| br i1 %a, label %hello, label %finished |
| |
| hello: |
| ; There are not enough NOPs to require relaxation. |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| call void asm sideeffect "nop", ""() |
| br label %finished |
| finished: |
| ret i8 3 |
| } |
| |