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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; REQUIRES: asserts
; RUN: opt < %s -passes='function(loop-vectorize,instcombine)' -force-vector-width=2 -force-vector-interleave=1 -debug-only=loop-vectorize -disable-output -print-after=instcombine 2>&1 | FileCheck %s
target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
; CHECK-LABEL: phi_two_incoming_values
; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: %i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: %tmp5 = phi i32 [ %tmp1, %for.body ], [ %tmp4, %if.then ]
;
define void @phi_two_incoming_values(ptr noalias %a, ptr noalias %b, i64 %n) {
; CHECK-LABEL: define void @phi_two_incoming_values(
; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[N_VEC:%.*]] = and i64 [[TMP0]], -2
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr [[TMP2]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP4:%.*]] = icmp sgt <2 x i32> [[WIDE_LOAD]], zeroinitializer
; CHECK-NEXT: [[TMP5:%.*]] = zext <2 x i1> [[TMP4]] to <2 x i32>
; CHECK-NEXT: [[PREDPHI:%.*]] = add <2 x i32> [[WIDE_LOAD]], [[TMP5]]
; CHECK-NEXT: store <2 x i32> [[PREDPHI]], ptr [[TMP3]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP6]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label %[[FOR_END:.*]], label %[[SCALAR_PH]]
; CHECK: [[SCALAR_PH]]:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], %[[IF_END:.*]] ], [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ]
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[I]]
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[TMP0]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[I]]
; CHECK-NEXT: [[TMP4:%.*]] = icmp sgt i32 [[TMP2]], 0
; CHECK-NEXT: br i1 [[TMP4]], label %[[IF_THEN:.*]], label %[[IF_END]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[TMP5:%.*]] = add nuw i32 [[TMP2]], 1
; CHECK-NEXT: br label %[[IF_END]]
; CHECK: [[IF_END]]:
; CHECK-NEXT: [[TMP6:%.*]] = phi i32 [ [[TMP2]], %[[FOR_BODY]] ], [ [[TMP5]], %[[IF_THEN]] ]
; CHECK-NEXT: store i32 [[TMP6]], ptr [[TMP3]], align 4
; CHECK-NEXT: [[I_NEXT]] = add i64 [[I]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i64 [[I]], [[N]]
; CHECK-NEXT: br i1 [[COND]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK: [[FOR_END]]:
; CHECK-NEXT: ret void
;
entry:
br label %for.body
for.body:
%i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
%tmp0 = getelementptr inbounds i32, ptr %a, i64 %i
%tmp1 = load i32, ptr %tmp0, align 4
%tmp2 = getelementptr inbounds i32, ptr %b, i64 %i
%tmp3 = icmp sgt i32 %tmp1, 0
br i1 %tmp3, label %if.then, label %if.end
if.then:
%tmp4 = add i32 %tmp1, 1
br label %if.end
if.end:
%tmp5 = phi i32 [ %tmp1, %for.body ], [ %tmp4, %if.then ]
store i32 %tmp5, ptr %tmp2, align 4
%i.next = add i64 %i, 1
%cond = icmp eq i64 %i, %n
br i1 %cond, label %for.end, label %for.body
for.end:
ret void
}
; CHECK-LABEL: phi_three_incoming_values
; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: %i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
; CHECK: LV: Found an estimated cost of 2 for VF 2 For instruction: %tmp8 = phi i32 [ 9, %for.body ], [ 3, %if.then ], [ %tmp7, %if.else ]
;
define void @phi_three_incoming_values(ptr noalias %a, ptr noalias %b, i64 %n) {
; CHECK-LABEL: define void @phi_three_incoming_values(
; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[N_VEC:%.*]] = and i64 [[TMP0]], -2
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD2:%.*]] = load <2 x i32>, ptr [[TMP4]], align 4
; CHECK-NEXT: [[TMP5:%.*]] = icmp sgt <2 x i32> [[WIDE_LOAD]], [[WIDE_LOAD2]]
; CHECK-NEXT: [[TMP6:%.*]] = icmp sgt <2 x i32> [[WIDE_LOAD]], splat (i32 19)
; CHECK-NEXT: [[TMP7:%.*]] = icmp slt <2 x i32> [[WIDE_LOAD2]], splat (i32 4)
; CHECK-NEXT: [[TMP8:%.*]] = select <2 x i1> [[TMP7]], <2 x i32> splat (i32 4), <2 x i32> splat (i32 5)
; CHECK-NEXT: [[PREDPHI:%.*]] = select <2 x i1> [[TMP6]], <2 x i32> splat (i32 3), <2 x i32> [[TMP8]]
; CHECK-NEXT: [[PREDPHI3:%.*]] = select <2 x i1> [[TMP5]], <2 x i32> [[PREDPHI]], <2 x i32> splat (i32 9)
; CHECK-NEXT: store <2 x i32> [[PREDPHI3]], ptr [[TMP3]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label %[[FOR_END:.*]], label %[[SCALAR_PH]]
; CHECK: [[SCALAR_PH]]:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], %[[IF_END:.*]] ], [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ]
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[I]]
; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP0]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[I]]
; CHECK-NEXT: [[TMP5:%.*]] = load i32, ptr [[TMP4]], align 4
; CHECK-NEXT: [[TMP6:%.*]] = icmp sgt i32 [[TMP3]], [[TMP5]]
; CHECK-NEXT: br i1 [[TMP6]], label %[[IF_THEN:.*]], label %[[IF_END]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[TMP7:%.*]] = icmp sgt i32 [[TMP3]], 19
; CHECK-NEXT: br i1 [[TMP7]], label %[[IF_END]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: [[TMP8:%.*]] = icmp slt i32 [[TMP5]], 4
; CHECK-NEXT: [[TMP9:%.*]] = select i1 [[TMP8]], i32 4, i32 5
; CHECK-NEXT: br label %[[IF_END]]
; CHECK: [[IF_END]]:
; CHECK-NEXT: [[TMP10:%.*]] = phi i32 [ 9, %[[FOR_BODY]] ], [ 3, %[[IF_THEN]] ], [ [[TMP9]], %[[IF_ELSE]] ]
; CHECK-NEXT: store i32 [[TMP10]], ptr [[TMP0]], align 4
; CHECK-NEXT: [[I_NEXT]] = add i64 [[I]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i64 [[I]], [[N]]
; CHECK-NEXT: br i1 [[COND]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK: [[FOR_END]]:
; CHECK-NEXT: ret void
;
entry:
br label %for.body
for.body:
%i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
%tmp0 = getelementptr inbounds i32, ptr %a, i64 %i
%tmp1 = load i32, ptr %tmp0, align 4
%tmp2 = getelementptr inbounds i32, ptr %b, i64 %i
%tmp3 = load i32, ptr %tmp2, align 4
%tmp4 = icmp sgt i32 %tmp1, %tmp3
br i1 %tmp4, label %if.then, label %if.end
if.then:
%tmp5 = icmp sgt i32 %tmp1, 19
br i1 %tmp5, label %if.end, label %if.else
if.else:
%tmp6 = icmp slt i32 %tmp3, 4
%tmp7 = select i1 %tmp6, i32 4, i32 5
br label %if.end
if.end:
%tmp8 = phi i32 [ 9, %for.body ], [ 3, %if.then ], [ %tmp7, %if.else ]
store i32 %tmp8, ptr %tmp0, align 4
%i.next = add i64 %i, 1
%cond = icmp eq i64 %i, %n
br i1 %cond, label %for.end, label %for.body
for.end:
ret void
}
; Test case for https://github.com/llvm/llvm-project/issues/113794.
define i32 @red_phi_0(i32 %start, ptr %src) {
; CHECK-LABEL: define i32 @red_phi_0(
; CHECK-SAME: i32 [[START:%.*]], ptr [[SRC:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
; CHECK: [[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: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i64 [[INDEX_NEXT]], 100
; CHECK-NEXT: br i1 [[TMP1]], label %[[SCALAR_PH:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK: [[SCALAR_PH]]:
; CHECK-NEXT: br label %[[EXIT:.*]]
; CHECK: [[SCALAR_PH1:.*:]]
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: br i1 poison, label %[[EXIT]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x i32> <i32 poison, i32 0>, i32 [[START]], i64 0
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @llvm.vector.reduce.add.v2i32(<2 x i32> [[TMP0]])
; CHECK-NEXT: ret i32 [[TMP2]]
;
entry:
br label %loop
loop:
%red = phi i32 [ %start, %entry ], [ %red.next, %loop ]
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%red.next = add i32 0, %red
%iv.next = add i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, 100
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i32 [ %red.next, %loop ]
ret i32 %res
}
|
