Precommit test for refine isBaseWithConstantOffset. NFC

Signed-off-by: feng.feng <[email protected]>

Author: fengfeng09

llvm/test/CodeGen/AVR/base-with-add-like-constant-offset.ll

@@ -0,0 +1,21 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+; RUN: llc -mtriple=avr %s -start-before=avr-isel -o - -stop-after=avr-isel | FileCheck %s
+
+define void @test(i16 %x, ptr addrspace(1) %o) {
+  ; CHECK-LABEL: name: test
+  ; CHECK: bb.0 (%ir-block.0):
+  ; CHECK-NEXT:   liveins: $r25r24, $r23r22
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:dldregs = COPY $r23r22
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:dregs = COPY $r25r24
+  ; CHECK-NEXT:   [[ORIWRdK:%[0-9]+]]:dldregs = ORIWRdK [[COPY]], 10, implicit-def dead $sreg
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:ptrdispregs = COPY [[ORIWRdK]]
+  ; CHECK-NEXT:   STWPtrRr killed [[COPY2]], [[COPY1]] :: (store (s16) into %ir.addr, align 1, addrspace 1)
+  ; CHECK-NEXT:   RET implicit $r1
+  %int = ptrtoint ptr addrspace(1) %o to i16
+  %or = or disjoint i16 %int, 10
+  %addr = inttoptr i16 %or to ptr addrspace(1)
+  store i16 %x, ptr addrspace(1) %addr
+  ret void
+}
+