24 lines
591 B
LLVM
24 lines
591 B
LLVM
; 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-NEXT: 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
|
|
}
|
|
|