llvm/test/Transforms/LoopVectorize/RISCV/pointer-induction-rv32.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
; RUN: opt < %s -S -p loop-vectorize -mtriple riscv32 -mattr=+v | FileCheck %s

; The VPWidenPointerInductionRecipe is expanded into a ptradd that uses EVL,
; make sure we allow it in VPlanVerifier
define i32 @widenpointerinduction_evl(ptr noalias %p) {
; CHECK-LABEL: define i32 @widenpointerinduction_evl(
; CHECK-SAME: ptr noalias [[P:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 4 x ptr> poison, ptr [[P]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 4 x ptr> [[BROADCAST_SPLATINSERT]], <vscale x 4 x ptr> poison, <vscale x 4 x i32> zeroinitializer
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[POINTER_PHI:%.*]] = phi ptr [ [[P]], %[[VECTOR_PH]] ], [ [[PTR_IND:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[AVL:%.*]] = phi i32 [ 1024, %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = call <vscale x 4 x i32> @llvm.stepvector.nxv4i32()
; CHECK-NEXT:    [[VECTOR_GEP:%.*]] = getelementptr i8, ptr [[POINTER_PHI]], <vscale x 4 x i32> [[TMP0]]
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.experimental.get.vector.length.i32(i32 [[AVL]], i32 4, i1 true)
; CHECK-NEXT:    call void @llvm.vp.scatter.nxv4p0.nxv4p0(<vscale x 4 x ptr> [[VECTOR_GEP]], <vscale x 4 x ptr> align 4 [[BROADCAST_SPLAT]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP1]])
; CHECK-NEXT:    [[AVL_NEXT]] = sub nuw i32 [[AVL]], [[TMP1]]
; CHECK-NEXT:    [[PTR_IND]] = getelementptr i8, ptr [[POINTER_PHI]], i32 [[TMP1]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[AVL_NEXT]], 0
; CHECK-NEXT:    br i1 [[TMP2]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ],  [ %iv.next, %loop ]
  %x = phi ptr [ %p, %entry ], [ %x.next, %loop ]

  store ptr %x, ptr %p

  %iv.next = add i32 %iv, 1
  %x.next = getelementptr i8, ptr %x, i32 1
  %ec = icmp eq i32 %iv.next, 1024
  br i1 %ec, label %exit, label %loop

exit:
  ret i32 0
}