| Evgeny Astigeevich | fd89fe0 | 2016-04-21 08:54:08 +0000 | [diff] [blame] | 1 | ; RUN: llc -mtriple=aarch64-linux-gnu -O3 -o - %s | FileCheck %s |
| 2 | |
| 3 | @a = external global i8, align 1 |
| 4 | @b = external global i8, align 1 |
| 5 | |
| 6 | ; Test that SUBS is replaced by SUB if condition flags are not used. |
| 7 | define i32 @test01() nounwind { |
| 8 | ; CHECK: ldrb {{.*}} |
| 9 | ; CHECK-NEXT: ldrb {{.*}} |
| 10 | ; CHECK-NEXT: sub {{.*}} |
| 11 | ; CHECK-NEXT: cmn {{.*}} |
| 12 | entry: |
| 13 | %0 = load i8, i8* @a, align 1 |
| 14 | %conv = zext i8 %0 to i32 |
| 15 | %1 = load i8, i8* @b, align 1 |
| 16 | %conv1 = zext i8 %1 to i32 |
| 17 | %s = sub nsw i32 %conv1, %conv |
| 18 | %cmp0 = icmp eq i32 %s, -1 |
| 19 | %cmp1 = sext i1 %cmp0 to i8 |
| 20 | store i8 %cmp1, i8* @a |
| 21 | ret i32 0 |
| 22 | } |
| 23 | |