1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
2 ; RUN: opt < %s -passes=loop-vectorize,instcombine -enable-histogram-loop-vectorization -force-vector-width=2 -S | FileCheck %s
4 ;; Currently we don't expect this to vectorize, since the generic cost model returns
5 ;; invalid for the histogram intrinsic.
6 define void @simple_histogram(ptr noalias %buckets, ptr readonly %indices, i64 %N) {
7 ; CHECK-LABEL: define void @simple_histogram(
8 ; CHECK-SAME: ptr noalias [[BUCKETS:%.*]], ptr readonly [[INDICES:%.*]], i64 [[N:%.*]]) {
10 ; CHECK-NEXT: br label [[FOR_BODY:%.*]]
12 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[FOR_BODY]] ]
13 ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw i32, ptr [[INDICES]], i64 [[IV]]
14 ; CHECK-NEXT: [[TMP12:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
15 ; CHECK-NEXT: [[IDXPROM1:%.*]] = zext i32 [[TMP12]] to i64
16 ; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds nuw i32, ptr [[BUCKETS]], i64 [[IDXPROM1]]
17 ; CHECK-NEXT: [[TMP13:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
18 ; CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[TMP13]], 1
19 ; CHECK-NEXT: store i32 [[INC]], ptr [[ARRAYIDX2]], align 4
20 ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
21 ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
22 ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_EXIT:%.*]], label [[FOR_BODY]]
24 ; CHECK-NEXT: ret void
30 %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
31 %gep.indices = getelementptr inbounds i32, ptr %indices, i64 %iv
32 %l.idx = load i32, ptr %gep.indices, align 4
33 %idxprom1 = zext i32 %l.idx to i64
34 %gep.bucket = getelementptr inbounds i32, ptr %buckets, i64 %idxprom1
35 %l.bucket = load i32, ptr %gep.bucket, align 4
36 %inc = add nsw i32 %l.bucket, 1
37 store i32 %inc, ptr %gep.bucket, align 4
38 %iv.next = add nuw nsw i64 %iv, 1
39 %exitcond = icmp eq i64 %iv.next, %N
40 br i1 %exitcond, label %for.exit, label %for.body