llvm/llvm/test/Transforms/PhaseOrdering/AArch64/globals-aa-required-for-vectorization.ll

; RUN: opt -passes='lto<O3>' -S %s | FileCheck %s

target triple = "arm64e-apple-darwin"

@A = external unnamed_addr global ptr, align 8
@B = external unnamed_addr global ptr, align 8
@C = internal unnamed_addr global i32 0, align 4
@D = external unnamed_addr global i32, align 4

; CHECK-LABEL: @fn
; CHECK: vector.body:
;
define void @fn() {
entry:
  %v.D = load i32, ptr @D, align 4
  store i32 %v.D, ptr @C, align 4
  call void @clobber()

  %v.B = load ptr, ptr @B, align 8
  %v.A = load ptr, ptr @A, align 8
  %v.gep.1 = load ptr, ptr %v.A, align 8
  %v.gep.2 = load ptr, ptr %v.B, align 8
  %cmp = icmp eq ptr %v.gep.2, null
  br i1 %cmp, label %exit, label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep.3 = getelementptr inbounds i8, ptr %v.gep.2, i32 %iv
  %v.gep.3 = load i8, ptr %gep.3, align 1
  %gep.4 = getelementptr inbounds i8, ptr %v.gep.1, i32 %iv
  store i8 %v.gep.3, ptr %gep.4, align 1
  %iv.next = add nuw nsw i32 %iv, 1
  %v.C = load i32, ptr @C, align 4
  %exit.cond = icmp sgt i32 %iv, %v.C
  br i1 %exit.cond, label %exit, label %loop

exit:
  ret void
}

declare void @clobber()