llvm/test/Transforms/LoopVectorize/RISCV/cse.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt < %s -S -p loop-vectorize -mtriple riscv32 -mattr=+v | FileCheck %s

; The EVL here is used by two VPWidenPointerInductionRecipes which are then
; expanded to two muls. The muls are then CSE'd, so make sure the verifier
; doesn't complain if a user of EVL has multiple uses.
define i32 @widenpointerinduction_evl_cse(ptr noalias %p0, ptr noalias %p1) {
; CHECK-LABEL: define i32 @widenpointerinduction_evl_cse(
; CHECK-SAME: ptr noalias [[P0:%.*]], ptr noalias [[P1:%.*]]) #[[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 [[P0]], 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:    [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <vscale x 4 x ptr> poison, ptr [[P1]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT2:%.*]] = shufflevector <vscale x 4 x ptr> [[BROADCAST_SPLATINSERT1]], <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 [ [[P0]], %[[VECTOR_PH]] ], [ [[PTR_IND:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[POINTER_PHI3:%.*]] = phi ptr [ [[P1]], %[[VECTOR_PH]] ], [ [[PTR_IND5:%.*]], %[[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:    [[TMP1:%.*]] = shl <vscale x 4 x i32> [[TMP0]], splat (i32 1)
; CHECK-NEXT:    [[VECTOR_GEP:%.*]] = getelementptr i8, ptr [[POINTER_PHI3]], <vscale x 4 x i32> [[TMP1]]
; CHECK-NEXT:    [[VECTOR_GEP4:%.*]] = getelementptr i8, ptr [[POINTER_PHI]], <vscale x 4 x i32> [[TMP1]]
; CHECK-NEXT:    [[TMP2:%.*]] = 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_GEP4]], <vscale x 4 x ptr> align 4 [[BROADCAST_SPLAT]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP2]])
; CHECK-NEXT:    call void @llvm.vp.scatter.nxv4p0.nxv4p0(<vscale x 4 x ptr> [[VECTOR_GEP]], <vscale x 4 x ptr> align 4 [[BROADCAST_SPLAT2]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP2]])
; CHECK-NEXT:    [[AVL_NEXT]] = sub nuw i32 [[AVL]], [[TMP2]]
; CHECK-NEXT:    [[TMP3:%.*]] = shl i32 [[TMP2]], 1
; CHECK-NEXT:    [[PTR_IND]] = getelementptr i8, ptr [[POINTER_PHI]], i32 [[TMP3]]
; CHECK-NEXT:    [[PTR_IND5]] = getelementptr i8, ptr [[POINTER_PHI3]], i32 [[TMP3]]
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i32 [[AVL_NEXT]], 0
; CHECK-NEXT:    br i1 [[TMP4]], 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 [ %p0, %entry ], [ %x.next, %loop ]
  %y = phi ptr [ %p1, %entry ], [ %y.next, %loop ]

  store ptr %x, ptr %p0
  store ptr %y, ptr %p1

  %iv.next = add i32 %iv, 1
  %x.next = getelementptr i8, ptr %x, i32 2
  %y.next = getelementptr i8, ptr %y, i32 2
  %ec = icmp eq i32 %iv.next, 1024
  br i1 %ec, label %exit, label %loop

exit:
  ret i32 0
}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
;.