llvm/test/Transforms/LoopVectorize/histograms.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
; RUN: opt < %s -passes=loop-vectorize -enable-histogram-loop-vectorization -force-vector-width=2 -S | FileCheck %s

define void @simple_histogram(ptr noalias %buckets, ptr readonly %indices) {
; CHECK-LABEL: define void @simple_histogram(
; CHECK-SAME: ptr noalias [[BUCKETS:%.*]], ptr readonly [[INDICES:%.*]]) {
; CHECK-NEXT:  [[ENTRY1:.*:]]
; CHECK-NEXT:    br label %[[ENTRY:.*]]
; CHECK:       [[ENTRY]]:
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr inbounds i32, ptr [[INDICES]], i64 [[IV]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr [[TMP0]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = zext <2 x i32> [[WIDE_LOAD]] to <2 x i64>
; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i32, ptr [[BUCKETS]], <2 x i64> [[TMP1]]
; CHECK-NEXT:    call void @llvm.experimental.vector.histogram.add.v2p0.i32(<2 x ptr> [[TMP7]], i32 1, <2 x i1> splat (i1 true))
; CHECK-NEXT:    [[IV_NEXT]] = add nuw i64 [[IV]], 2
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[IV_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TMP8]], label %[[SCALAR_PH:.*]], label %[[FOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    br label %[[FOR_BODY1:.*]]
; CHECK:       [[FOR_BODY1]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep.indices = getelementptr inbounds i32, ptr %indices, i64 %iv
  %l.idx = load i32, ptr %gep.indices, align 4
  %idxprom1 = zext i32 %l.idx to i64
  %gep.bucket = getelementptr inbounds i32, ptr %buckets, i64 %idxprom1
  %l.bucket = load i32, ptr %gep.bucket, align 4
  %inc = add nsw i32 %l.bucket, 1
  store i32 %inc, ptr %gep.bucket, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 1000
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}

define void @histogram_extra_use_of_bucket_value(ptr noalias %buckets, ptr readonly %indices, ptr noalias %out) {
; CHECK-LABEL: define void @histogram_extra_use_of_bucket_value(
; CHECK-SAME: ptr noalias [[BUCKETS:%.*]], ptr readonly [[INDICES:%.*]], ptr noalias [[OUT:%.*]]) {
; CHECK-NEXT:  [[VECTOR_PH:.*]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[INDICES]], i64 [[INDEX]]
; CHECK-NEXT:    [[L_IDX:%.*]] = load i32, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = zext i32 [[L_IDX]] to i64
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[BUCKETS]], i64 [[TMP5]]
; CHECK-NEXT:    [[TMP10:%.*]] = load i32, ptr [[TMP6]], align 4
; CHECK-NEXT:    [[INC:%.*]] = add nsw i32 [[TMP10]], 1
; CHECK-NEXT:    store i32 [[INC]], ptr [[TMP6]], align 4
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr inbounds i32, ptr [[OUT]], i64 [[INDEX]]
; CHECK-NEXT:    store i32 [[TMP10]], ptr [[TMP13]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw nsw i64 [[INDEX]], 1
; CHECK-NEXT:    [[TMP14:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TMP14]], label %[[LOOP:.*]], label %[[VECTOR_BODY]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep.indices = getelementptr inbounds i32, ptr %indices, i64 %iv
  %l.idx = load i32, ptr %gep.indices, align 4
  %idxprom1 = zext i32 %l.idx to i64
  %gep.bucket = getelementptr inbounds i32, ptr %buckets, i64 %idxprom1
  %l.bucket = load i32, ptr %gep.bucket, align 4
  %inc = add nsw i32 %l.bucket, 1
  store i32 %inc, ptr %gep.bucket, align 4
  %gep.out = getelementptr inbounds i32, ptr %out, i64 %iv
  store i32 %l.bucket, ptr %gep.out, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 1000
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}

define void @histogram_extra_use_of_update(ptr noalias %buckets, ptr readonly %indices, ptr noalias %out) {
; CHECK-LABEL: define void @histogram_extra_use_of_update(
; CHECK-SAME: ptr noalias [[BUCKETS:%.*]], ptr readonly [[INDICES:%.*]], ptr noalias [[OUT:%.*]]) {
; CHECK-NEXT:  [[VECTOR_PH:.*]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[INDICES]], i64 [[INDEX]]
; CHECK-NEXT:    [[L_IDX:%.*]] = load i32, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = zext i32 [[L_IDX]] to i64
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[BUCKETS]], i64 [[TMP5]]
; CHECK-NEXT:    [[TMP10:%.*]] = load i32, ptr [[TMP6]], align 4
; CHECK-NEXT:    [[INC:%.*]] = add nsw i32 [[TMP10]], 1
; CHECK-NEXT:    store i32 [[INC]], ptr [[TMP6]], align 4
; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr inbounds i32, ptr [[OUT]], i64 [[INDEX]]
; CHECK-NEXT:    store i32 [[INC]], ptr [[TMP14]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw nsw i64 [[INDEX]], 1
; CHECK-NEXT:    [[TMP15:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TMP15]], label %[[LOOP:.*]], label %[[VECTOR_BODY]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep.indices = getelementptr inbounds i32, ptr %indices, i64 %iv
  %l.idx = load i32, ptr %gep.indices, align 4
  %idxprom1 = zext i32 %l.idx to i64
  %gep.bucket = getelementptr inbounds i32, ptr %buckets, i64 %idxprom1
  %l.bucket = load i32, ptr %gep.bucket, align 4
  %inc = add nsw i32 %l.bucket, 1
  store i32 %inc, ptr %gep.bucket, align 4
  %gep.out = getelementptr inbounds i32, ptr %out, i64 %iv
  store i32 %inc, ptr %gep.out, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 1000
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}