test/Transforms/LoopVectorize/interleaved-accesses-3.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=loop-vectorize,instcombine -force-vector-width=4 -force-vector-interleave=1 -enable-interleaved-mem-accesses=true < %s | FileCheck %s

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

; Check that the interleaved-mem-access analysis currently does not create an
; interleave group for access 'a' due to the possible pointer wrap-around.
;
; To begin with, in this test the candidate interleave group can be created
; only when getPtrStride is called with Assume=true. Next, because
; the interleave-group of the loads is not full (has gaps), we also need to check
; for possible pointer wrapping. Here we currently use Assume=false and as a
; result cannot prove the transformation is safe and therefore invalidate the
; candidate interleave group.
;

; void func(unsigned * __restrict a, unsigned * __restrict b, unsigned char x, unsigned char y) {
;  int i = 0;
;  for (unsigned char index = x; i < y; index +=2, ++i)
;    b[i] = aptr 2;
;
; }

define void @_Z4funcPjS_hh(ptr noalias nocapture readonly %a, ptr noalias nocapture %b, i8 zeroext %x, i8 zeroext %y) local_unnamed_addr {
; CHECK-LABEL: define void @_Z4funcPjS_hh(
; CHECK-SAME: ptr noalias nocapture readonly [[A:%.*]], ptr noalias nocapture [[B:%.*]], i8 zeroext [[X:%.*]], i8 zeroext [[Y:%.*]]) local_unnamed_addr {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[CMP9:%.*]] = icmp eq i8 [[Y]], 0
; CHECK-NEXT:    br i1 [[CMP9]], label %[[FOR_COND_CLEANUP:.*]], label %[[FOR_BODY_PREHEADER:.*]]
; CHECK:       [[FOR_BODY_PREHEADER]]:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i8 [[Y]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i8 [[Y]], 5
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_SCEVCHECK:.*]]
; CHECK:       [[VECTOR_SCEVCHECK]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i64 [[WIDE_TRIP_COUNT]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = trunc i64 [[TMP0]] to i8
; CHECK-NEXT:    [[MUL_RESULT:%.*]] = shl i8 [[TMP1]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = xor i8 [[X]], -1
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ugt i8 [[MUL_RESULT]], [[TMP2]]
; CHECK-NEXT:    [[TMP4:%.*]] = icmp ugt i64 [[TMP0]], 127
; CHECK-NEXT:    [[TMP5:%.*]] = or i1 [[TMP3]], [[TMP4]]
; CHECK-NEXT:    br i1 [[TMP5]], label %[[SCALAR_PH]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 3
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[N_MOD_VF]], 0
; CHECK-NEXT:    [[TMP7:%.*]] = select i1 [[TMP8]], i64 4, i64 [[N_MOD_VF]]
; CHECK-NEXT:    [[N_VEC:%.*]] = sub nsw i64 [[WIDE_TRIP_COUNT]], [[TMP7]]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i64 [[N_VEC]] to i8
; CHECK-NEXT:    [[TMP6:%.*]] = shl i8 [[DOTCAST]], 1
; CHECK-NEXT:    [[IND_END:%.*]] = add i8 [[X]], [[TMP6]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[DOTCAST3:%.*]] = trunc i64 [[INDEX]] to i8
; CHECK-NEXT:    [[TMP9:%.*]] = shl i8 [[DOTCAST3]], 1
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i8 [[X]], [[TMP9]]
; CHECK-NEXT:    [[TMP14:%.*]] = zext i8 [[OFFSET_IDX]] to i64
; CHECK-NEXT:    [[TMP15:%.*]] = getelementptr inbounds nuw i32, ptr [[A]], i64 [[TMP14]]
; CHECK-NEXT:    [[WIDE_VEC:%.*]] = load <8 x i32>, ptr [[TMP15]], align 4
; CHECK-NEXT:    [[TMP23:%.*]] = shufflevector <8 x i32> [[WIDE_VEC]], <8 x i32> poison, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
; CHECK-NEXT:    [[TMP24:%.*]] = shl <4 x i32> [[TMP23]], splat (i32 1)
; CHECK-NEXT:    [[TMP25:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    store <4 x i32> [[TMP24]], ptr [[TMP25]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP26:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP26]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[VECTOR_SCEVCHECK]] ], [ 0, %[[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL3:%.*]] = phi i8 [ [[IND_END]], %[[MIDDLE_BLOCK]] ], [ [[X]], %[[VECTOR_SCEVCHECK]] ], [ [[X]], %[[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_COND_CLEANUP_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[FOR_COND_CLEANUP]]
; CHECK:       [[FOR_COND_CLEANUP]]:
; CHECK-NEXT:    ret void
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_BODY]] ], [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ]
; CHECK-NEXT:    [[INDEX_011:%.*]] = phi i8 [ [[ADD:%.*]], %[[FOR_BODY]] ], [ [[BC_RESUME_VAL3]], %[[SCALAR_PH]] ]
; CHECK-NEXT:    [[IDXPROM:%.*]] = zext i8 [[INDEX_011]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds nuw i32, ptr [[A]], i64 [[IDXPROM]]
; CHECK-NEXT:    [[TMP27:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[MUL:%.*]] = shl i32 [[TMP27]], 1
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store i32 [[MUL]], ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT:    [[ADD]] = add i8 [[INDEX_011]], 2
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_COND_CLEANUP_LOOPEXIT]], label %[[FOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
;
entry:
  %cmp9 = icmp eq i8 %y, 0
  br i1 %cmp9, label %for.cond.cleanup, label %for.body.preheader

for.body.preheader:
  %wide.trip.count = zext i8 %y to i64
  br label %for.body

for.cond.cleanup.loopexit:
  br label %for.cond.cleanup

for.cond.cleanup:
  ret void

for.body:
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
  %index.011 = phi i8 [ %add, %for.body ], [ %x, %for.body.preheader ]
  %idxprom = zext i8 %index.011 to i64
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %idxprom
  %0 = load i32, ptr %arrayidx, align 4
  %mul = shl i32 %0, 1
  %arrayidx2 = getelementptr inbounds i32, ptr %b, i64 %indvars.iv
  store i32 %mul, ptr %arrayidx2, align 4
  %add = add i8 %index.011, 2
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]]}
;.