| ; RUN: llc -mtriple=aarch64-linux-gnu -O3 -o - %s | FileCheck %s |
| |
| @a = external global i8, align 1 |
| @b = external global i8, align 1 |
| |
| ; Test that SUBS is replaced by SUB if condition flags are not used. |
| define i32 @test01() nounwind { |
| ; CHECK: ldrb {{.*}} |
| ; CHECK-NEXT: ldrb {{.*}} |
| ; CHECK: sub {{.*}} |
| ; CHECK-NEXT: cmn {{.*}} |
| entry: |
| %0 = load i8, i8* @a, align 1 |
| %conv = zext i8 %0 to i32 |
| %1 = load i8, i8* @b, align 1 |
| %conv1 = zext i8 %1 to i32 |
| %s = sub nsw i32 %conv1, %conv |
| %cmp0 = icmp eq i32 %s, -1 |
| %cmp1 = sext i1 %cmp0 to i8 |
| store i8 %cmp1, i8* @a |
| ret i32 0 |
| } |
| |
