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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt < %s -mattr=+sve2 -passes=loop-vectorize,instcombine -enable-histogram-loop-vectorization -sve-gather-overhead=2 -sve-scatter-overhead=2 -force-vector-interleave=1 -max-dependences=2 -debug-only=loop-vectorize,loop-accesses -S 2>&1 | FileCheck %s
; RUN: opt < %s -mattr=+sve2 -passes=loop-vectorize,instcombine -enable-histogram-loop-vectorization -sve-gather-overhead=2 -sve-scatter-overhead=2 -force-vector-interleave=1 -debug-only=loop-vectorize,loop-accesses -S 2>&1 | FileCheck %s --check-prefix=NORMAL_DEP_LIMIT
; REQUIRES: asserts
target triple = "aarch64-unknown-linux-gnu"
;; Check that we don't crash if LAA gives up on recording dependences and
;; returns a null pointer.
; CHECK-LABEL: LAA: Checking a loop in 'many_deps'
; CHECK: Too many dependences, stopped recording
; CHECK: LV: Can't vectorize due to memory conflicts
; CHECK: LV: Not vectorizing: Cannot prove legality.
define void @many_deps(ptr noalias %buckets, ptr %array, ptr %indices, ptr %other, i64 %N) {
; CHECK-LABEL: define void @many_deps(
; CHECK-SAME: ptr noalias [[BUCKETS:%.*]], ptr [[ARRAY:%.*]], ptr [[INDICES:%.*]], ptr [[OTHER:%.*]], i64 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[GEP_INDICES:%.*]] = getelementptr inbounds nuw i32, ptr [[INDICES]], i64 [[IV]]
; CHECK-NEXT: [[L_IDX:%.*]] = load i32, ptr [[GEP_INDICES]], align 4
; CHECK-NEXT: [[IDXPROM1:%.*]] = zext i32 [[L_IDX]] to i64
; CHECK-NEXT: [[GEP_BUCKET:%.*]] = getelementptr inbounds nuw i32, ptr [[BUCKETS]], i64 [[IDXPROM1]]
; CHECK-NEXT: [[L_BUCKET:%.*]] = load i32, ptr [[GEP_BUCKET]], align 4
; CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[L_BUCKET]], 1
; CHECK-NEXT: store i32 [[INC]], ptr [[GEP_BUCKET]], align 4
; CHECK-NEXT: [[IDX_ADDR:%.*]] = getelementptr inbounds nuw i32, ptr [[ARRAY]], i64 [[IV]]
; CHECK-NEXT: [[IV_TRUNC:%.*]] = trunc i64 [[IV]] to i32
; CHECK-NEXT: store i32 [[IV_TRUNC]], ptr [[IDX_ADDR]], align 4
; CHECK-NEXT: [[GEP_OTHER:%.*]] = getelementptr inbounds nuw i32, ptr [[OTHER]], i64 [[IV]]
; CHECK-NEXT: [[L_OTHER:%.*]] = load i32, ptr [[GEP_OTHER]], align 4
; CHECK-NEXT: [[ADD_OTHER:%.*]] = add i32 [[L_OTHER]], [[IV_TRUNC]]
; CHECK-NEXT: store i32 [[ADD_OTHER]], ptr [[GEP_OTHER]], align 4
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_EXIT:%.*]], label [[FOR_BODY]]
; CHECK: for.exit:
; CHECK-NEXT: ret void
;
; NORMAL_DEP_LIMIT-LABEL: define void @many_deps(
; NORMAL_DEP_LIMIT-SAME: ptr noalias [[BUCKETS:%.*]], ptr [[ARRAY:%.*]], ptr [[INDICES:%.*]], ptr [[OTHER:%.*]], i64 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
; NORMAL_DEP_LIMIT-NEXT: entry:
; NORMAL_DEP_LIMIT-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; NORMAL_DEP_LIMIT-NEXT: [[TMP1:%.*]] = shl i64 [[TMP0]], 2
; NORMAL_DEP_LIMIT-NEXT: [[TMP2:%.*]] = call i64 @llvm.umax.i64(i64 [[TMP1]], i64 8)
; NORMAL_DEP_LIMIT-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], [[TMP2]]
; NORMAL_DEP_LIMIT-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; NORMAL_DEP_LIMIT: vector.memcheck:
; NORMAL_DEP_LIMIT-NEXT: [[TMP3:%.*]] = shl i64 [[N]], 2
; NORMAL_DEP_LIMIT-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[ARRAY]], i64 [[TMP3]]
; NORMAL_DEP_LIMIT-NEXT: [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[OTHER]], i64 [[TMP3]]
; NORMAL_DEP_LIMIT-NEXT: [[SCEVGEP2:%.*]] = getelementptr i8, ptr [[INDICES]], i64 [[TMP3]]
; NORMAL_DEP_LIMIT-NEXT: [[BOUND0:%.*]] = icmp ult ptr [[ARRAY]], [[SCEVGEP1]]
; NORMAL_DEP_LIMIT-NEXT: [[BOUND1:%.*]] = icmp ult ptr [[OTHER]], [[SCEVGEP]]
; NORMAL_DEP_LIMIT-NEXT: [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; NORMAL_DEP_LIMIT-NEXT: [[BOUND03:%.*]] = icmp ult ptr [[ARRAY]], [[SCEVGEP2]]
; NORMAL_DEP_LIMIT-NEXT: [[BOUND14:%.*]] = icmp ult ptr [[INDICES]], [[SCEVGEP]]
; NORMAL_DEP_LIMIT-NEXT: [[FOUND_CONFLICT5:%.*]] = and i1 [[BOUND03]], [[BOUND14]]
; NORMAL_DEP_LIMIT-NEXT: [[CONFLICT_RDX:%.*]] = or i1 [[FOUND_CONFLICT]], [[FOUND_CONFLICT5]]
; NORMAL_DEP_LIMIT-NEXT: [[BOUND06:%.*]] = icmp ult ptr [[OTHER]], [[SCEVGEP2]]
; NORMAL_DEP_LIMIT-NEXT: [[BOUND17:%.*]] = icmp ult ptr [[INDICES]], [[SCEVGEP1]]
; NORMAL_DEP_LIMIT-NEXT: [[FOUND_CONFLICT8:%.*]] = and i1 [[BOUND06]], [[BOUND17]]
; NORMAL_DEP_LIMIT-NEXT: [[CONFLICT_RDX9:%.*]] = or i1 [[CONFLICT_RDX]], [[FOUND_CONFLICT8]]
; NORMAL_DEP_LIMIT-NEXT: br i1 [[CONFLICT_RDX9]], label [[SCALAR_PH]], label [[ENTRY:%.*]]
; NORMAL_DEP_LIMIT: vector.ph:
; NORMAL_DEP_LIMIT-NEXT: [[TMP4:%.*]] = call i64 @llvm.vscale.i64()
; NORMAL_DEP_LIMIT-NEXT: [[TMP8:%.*]] = shl i64 [[TMP4]], 2
; NORMAL_DEP_LIMIT-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], [[TMP8]]
; NORMAL_DEP_LIMIT-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; NORMAL_DEP_LIMIT-NEXT: [[TMP5:%.*]] = call i64 @llvm.vscale.i64()
; NORMAL_DEP_LIMIT-NEXT: [[TMP6:%.*]] = shl i64 [[TMP5]], 2
; NORMAL_DEP_LIMIT-NEXT: [[TMP7:%.*]] = call <vscale x 4 x i32> @llvm.stepvector.nxv4i32()
; NORMAL_DEP_LIMIT-NEXT: [[TMP9:%.*]] = trunc i64 [[TMP6]] to i32
; NORMAL_DEP_LIMIT-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[TMP9]], i64 0
; NORMAL_DEP_LIMIT-NEXT: [[DOTSPLAT:%.*]] = shufflevector <vscale x 4 x i32> [[DOTSPLATINSERT]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
; NORMAL_DEP_LIMIT-NEXT: br label [[FOR_BODY:%.*]]
; NORMAL_DEP_LIMIT: vector.body:
; NORMAL_DEP_LIMIT-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY]] ], [ [[IV_NEXT:%.*]], [[FOR_BODY]] ]
; NORMAL_DEP_LIMIT-NEXT: [[VEC_IND:%.*]] = phi <vscale x 4 x i32> [ [[TMP7]], [[ENTRY]] ], [ [[VEC_IND_NEXT:%.*]], [[FOR_BODY]] ]
; NORMAL_DEP_LIMIT-NEXT: [[GEP_INDICES:%.*]] = getelementptr inbounds i32, ptr [[INDICES]], i64 [[IV]]
; NORMAL_DEP_LIMIT-NEXT: [[WIDE_LOAD:%.*]] = load <vscale x 4 x i32>, ptr [[GEP_INDICES]], align 4, !alias.scope [[META0:![0-9]+]]
; NORMAL_DEP_LIMIT-NEXT: [[TMP11:%.*]] = zext <vscale x 4 x i32> [[WIDE_LOAD]] to <vscale x 4 x i64>
; NORMAL_DEP_LIMIT-NEXT: [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[BUCKETS]], <vscale x 4 x i64> [[TMP11]]
; NORMAL_DEP_LIMIT-NEXT: call void @llvm.experimental.vector.histogram.add.nxv4p0.i32(<vscale x 4 x ptr> [[TMP12]], i32 1, <vscale x 4 x i1> splat (i1 true))
; NORMAL_DEP_LIMIT-NEXT: [[TMP13:%.*]] = getelementptr inbounds i32, ptr [[ARRAY]], i64 [[IV]]
; NORMAL_DEP_LIMIT-NEXT: store <vscale x 4 x i32> [[VEC_IND]], ptr [[TMP13]], align 4, !alias.scope [[META3:![0-9]+]], !noalias [[META5:![0-9]+]]
; NORMAL_DEP_LIMIT-NEXT: [[TMP14:%.*]] = getelementptr inbounds i32, ptr [[OTHER]], i64 [[IV]]
; NORMAL_DEP_LIMIT-NEXT: [[WIDE_LOAD10:%.*]] = load <vscale x 4 x i32>, ptr [[TMP14]], align 4, !alias.scope [[META7:![0-9]+]], !noalias [[META0]]
; NORMAL_DEP_LIMIT-NEXT: [[TMP15:%.*]] = add <vscale x 4 x i32> [[WIDE_LOAD10]], [[VEC_IND]]
; NORMAL_DEP_LIMIT-NEXT: store <vscale x 4 x i32> [[TMP15]], ptr [[TMP14]], align 4, !alias.scope [[META7]], !noalias [[META0]]
; NORMAL_DEP_LIMIT-NEXT: [[IV_NEXT]] = add nuw i64 [[IV]], [[TMP6]]
; NORMAL_DEP_LIMIT-NEXT: [[VEC_IND_NEXT]] = add <vscale x 4 x i32> [[VEC_IND]], [[DOTSPLAT]]
; NORMAL_DEP_LIMIT-NEXT: [[TMP16:%.*]] = icmp eq i64 [[IV_NEXT]], [[N_VEC]]
; NORMAL_DEP_LIMIT-NEXT: br i1 [[TMP16]], label [[MIDDLE_BLOCK:%.*]], label [[FOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; NORMAL_DEP_LIMIT: middle.block:
; NORMAL_DEP_LIMIT-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N_MOD_VF]], 0
; NORMAL_DEP_LIMIT-NEXT: br i1 [[CMP_N]], label [[FOR_EXIT:%.*]], label [[SCALAR_PH]]
; NORMAL_DEP_LIMIT: scalar.ph:
; NORMAL_DEP_LIMIT-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[VECTOR_MEMCHECK]] ], [ 0, [[ENTRY1:%.*]] ]
; NORMAL_DEP_LIMIT-NEXT: br label [[FOR_BODY1:%.*]]
; NORMAL_DEP_LIMIT: for.body:
; NORMAL_DEP_LIMIT-NEXT: [[IV1:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT1:%.*]], [[FOR_BODY1]] ]
; NORMAL_DEP_LIMIT-NEXT: [[GEP_INDICES1:%.*]] = getelementptr inbounds i32, ptr [[INDICES]], i64 [[IV1]]
; NORMAL_DEP_LIMIT-NEXT: [[L_IDX:%.*]] = load i32, ptr [[GEP_INDICES1]], align 4
; NORMAL_DEP_LIMIT-NEXT: [[IDXPROM1:%.*]] = zext i32 [[L_IDX]] to i64
; NORMAL_DEP_LIMIT-NEXT: [[GEP_BUCKET:%.*]] = getelementptr inbounds nuw i32, ptr [[BUCKETS]], i64 [[IDXPROM1]]
; NORMAL_DEP_LIMIT-NEXT: [[L_BUCKET:%.*]] = load i32, ptr [[GEP_BUCKET]], align 4
; NORMAL_DEP_LIMIT-NEXT: [[INC:%.*]] = add nsw i32 [[L_BUCKET]], 1
; NORMAL_DEP_LIMIT-NEXT: store i32 [[INC]], ptr [[GEP_BUCKET]], align 4
; NORMAL_DEP_LIMIT-NEXT: [[IDX_ADDR:%.*]] = getelementptr inbounds i32, ptr [[ARRAY]], i64 [[IV1]]
; NORMAL_DEP_LIMIT-NEXT: [[IV_TRUNC:%.*]] = trunc i64 [[IV1]] to i32
; NORMAL_DEP_LIMIT-NEXT: store i32 [[IV_TRUNC]], ptr [[IDX_ADDR]], align 4
; NORMAL_DEP_LIMIT-NEXT: [[GEP_OTHER:%.*]] = getelementptr inbounds i32, ptr [[OTHER]], i64 [[IV1]]
; NORMAL_DEP_LIMIT-NEXT: [[L_OTHER:%.*]] = load i32, ptr [[GEP_OTHER]], align 4
; NORMAL_DEP_LIMIT-NEXT: [[ADD_OTHER:%.*]] = add i32 [[L_OTHER]], [[IV_TRUNC]]
; NORMAL_DEP_LIMIT-NEXT: store i32 [[ADD_OTHER]], ptr [[GEP_OTHER]], align 4
; NORMAL_DEP_LIMIT-NEXT: [[IV_NEXT1]] = add nuw nsw i64 [[IV1]], 1
; NORMAL_DEP_LIMIT-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT1]], [[N]]
; NORMAL_DEP_LIMIT-NEXT: br i1 [[EXITCOND]], label [[FOR_EXIT]], label [[FOR_BODY1]], !llvm.loop [[LOOP11:![0-9]+]]
; NORMAL_DEP_LIMIT: for.exit:
; NORMAL_DEP_LIMIT-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
%idx.addr = getelementptr inbounds i32, ptr %array, i64 %iv
%iv.trunc = trunc i64 %iv to i32
store i32 %iv.trunc, ptr %idx.addr, align 4
%gep.other = getelementptr inbounds i32, ptr %other, i64 %iv
%l.other = load i32, ptr %gep.other, align 4
%add.other = add i32 %l.other, %iv.trunc
store i32 %add.other, ptr %gep.other, 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
}
|
