test/Transforms/LoopVectorize/narrow-to-single-scalar-widen-gep-scalable.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "^scalar.ph" --version 6
; RUN: opt -p loop-vectorize -force-vector-width=2 \
; RUN:  -force-target-supports-scalable-vectors=true \
; RUN:  -scalable-vectorization=preferred -S %s | FileCheck %s

define void @widengep_narrow(ptr %in, ptr noalias %p) {
; CHECK-LABEL: define void @widengep_narrow(
; CHECK-SAME: ptr [[IN:%.*]], ptr noalias [[P:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[TMP1:%.*]] = shl nuw i64 [[TMP0]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 1025, [[TMP1]]
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[TMP3:%.*]] = shl nuw i64 [[TMP2]], 1
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 1025, [[TMP3]]
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 1025, [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr i8, ptr [[IN]], i64 8
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <vscale x 2 x ptr> poison, ptr [[TMP4]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT2:%.*]] = shufflevector <vscale x 2 x ptr> [[BROADCAST_SPLATINSERT1]], <vscale x 2 x ptr> poison, <vscale x 2 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP5:%.*]] = call <vscale x 2 x i64> @llvm.stepvector.nxv2i64()
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[TMP3]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <vscale x 2 x i64> [ [[TMP5]], %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr i32, <vscale x 2 x ptr> [[BROADCAST_SPLAT2]], <vscale x 2 x i64> [[VEC_IND]]
; CHECK-NEXT:    [[TMP8:%.*]] = call i32 @llvm.vscale.i32()
; CHECK-NEXT:    [[TMP9:%.*]] = mul nuw i32 [[TMP8]], 2
; CHECK-NEXT:    [[TMP10:%.*]] = sub i32 [[TMP9]], 1
; CHECK-NEXT:    [[TMP11:%.*]] = extractelement <vscale x 2 x ptr> [[TMP7]], i32 [[TMP10]]
; CHECK-NEXT:    store ptr [[TMP11]], ptr [[P]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP3]]
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <vscale x 2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP12]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 1025, [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], [[EXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep.in.off = getelementptr i8, ptr %in, i64 8
  %gep.in.iv = getelementptr i32, ptr %gep.in.off, i64 %iv
  store ptr %gep.in.iv, ptr %p
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv, 1024
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}