Pre-commit test (NFC)

Author: AZero13

llvm/test/CodeGen/AArch64/instruct-neg.ll

@@ -0,0 +1,12 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=aarch64-linux-gnu -O0 -fast-isel -fast-isel-abort=1 -verify-machineinstrs < %s | FileCheck %s --check-prefix=CHECK
+
+define i32 @negb(i32 %b) {
+; CHECK-LABEL: negb:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    mov w8, wzr
+; CHECK-NEXT:    sub w0, w8, w0
+; CHECK-NEXT:    ret
+  %sub = sub nsw i32 0, %b
+  ret i32 %sub
+}