1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt < %s -passes=loop-vectorize,instcombine -enable-histogram-loop-vectorization -force-vector-width=2 -S | FileCheck %s
define void @simple_histogram(ptr noalias %buckets, ptr readonly %indices, i64 %N) {
; CHECK-LABEL: define void @simple_histogram(
; CHECK-SAME: ptr noalias [[BUCKETS:%.*]], ptr readonly [[INDICES:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[ENTRY:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_VEC:%.*]] = and i64 [[N]], -2
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: vector.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: [[TMP2:%.*]] = extractelement <2 x i64> [[TMP1]], i64 0
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds nuw i32, ptr [[BUCKETS]], i64 [[TMP2]]
; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x i64> [[TMP1]], i64 1
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds nuw i32, ptr [[BUCKETS]], i64 [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x ptr> poison, ptr [[TMP3]], i64 0
; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x ptr> [[TMP6]], ptr [[TMP5]], i64 1
; 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]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[FOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_EXIT:%.*]], label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY1:%.*]] ]
; CHECK-NEXT: br label [[FOR_BODY1:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IV1:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT1:%.*]], [[FOR_BODY1]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[INDICES]], i64 [[IV1]]
; CHECK-NEXT: [[TMP12:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[IDXPROM1:%.*]] = zext i32 [[TMP12]] to i64
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds nuw i32, ptr [[BUCKETS]], i64 [[IDXPROM1]]
; CHECK-NEXT: [[TMP13:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[TMP13]], 1
; CHECK-NEXT: store i32 [[INC]], ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[IV_NEXT1]] = add nuw nsw i64 [[IV1]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT1]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_EXIT]], label [[FOR_BODY1]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK: for.exit:
; CHECK-NEXT: ret void
;
entry:
br label %for.body
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
%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, %N
br i1 %exitcond, label %for.exit, label %for.body
for.exit:
ret void
}
|
