1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -loop-predication -loop-predication-enable-iv-truncation=true < %s 2>&1 | FileCheck %s
3 declare void @llvm.experimental.guard(i1, ...)
5 declare i32 @length(i8*)
7 declare i16 @short_length(i8*)
8 ; Consider range check of type i16 and i32, while IV is of type i64
9 ; We can loop predicate this because the IV range is within i16 and within i32.
10 define i64 @iv_wider_type_rc_two_narrow_types(i32 %offA, i16 %offB, i8* %arrA, i8* %arrB) {
11 ; CHECK-LABEL: @iv_wider_type_rc_two_narrow_types(
13 ; CHECK-NEXT: [[LENGTHA:%.*]] = call i32 @length(i8* [[ARRA:%.*]])
14 ; CHECK-NEXT: [[LENGTHB:%.*]] = call i16 @short_length(i8* [[ARRB:%.*]])
15 ; CHECK-NEXT: [[TMP0:%.*]] = sub i16 [[LENGTHB]], [[OFFB:%.*]]
16 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i16 16, [[TMP0]]
17 ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i16 [[OFFB]], [[LENGTHB]]
18 ; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]]
19 ; CHECK-NEXT: [[TMP4:%.*]] = sub i32 [[LENGTHA]], [[OFFA:%.*]]
20 ; CHECK-NEXT: [[TMP5:%.*]] = icmp ule i32 16, [[TMP4]]
21 ; CHECK-NEXT: [[TMP6:%.*]] = icmp ult i32 [[OFFA]], [[LENGTHA]]
22 ; CHECK-NEXT: [[TMP7:%.*]] = and i1 [[TMP6]], [[TMP5]]
23 ; CHECK-NEXT: [[TMP8:%.*]] = and i1 [[TMP3]], [[TMP7]]
24 ; CHECK-NEXT: br label [[LOOP:%.*]]
26 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
27 ; CHECK-NEXT: [[IV_TRUNC_32:%.*]] = trunc i64 [[IV]] to i32
28 ; CHECK-NEXT: [[IV_TRUNC_16:%.*]] = trunc i64 [[IV]] to i16
29 ; CHECK-NEXT: [[INDEXA:%.*]] = add i32 [[IV_TRUNC_32]], [[OFFA]]
30 ; CHECK-NEXT: [[INDEXB:%.*]] = add i16 [[IV_TRUNC_16]], [[OFFB]]
31 ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP8]], i32 9) [ "deopt"() ]
32 ; CHECK-NEXT: [[INDEXA_EXT:%.*]] = zext i32 [[INDEXA]] to i64
33 ; CHECK-NEXT: [[ADDRA:%.*]] = getelementptr inbounds i8, i8* [[ARRA]], i64 [[INDEXA_EXT]]
34 ; CHECK-NEXT: [[ELTA:%.*]] = load i8, i8* [[ADDRA]]
35 ; CHECK-NEXT: [[INDEXB_EXT:%.*]] = zext i16 [[INDEXB]] to i64
36 ; CHECK-NEXT: [[ADDRB:%.*]] = getelementptr inbounds i8, i8* [[ARRB]], i64 [[INDEXB_EXT]]
37 ; CHECK-NEXT: store i8 [[ELTA]], i8* [[ADDRB]]
38 ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
39 ; CHECK-NEXT: [[LATCH_CHECK:%.*]] = icmp ult i64 [[IV_NEXT]], 16
40 ; CHECK-NEXT: br i1 [[LATCH_CHECK]], label [[LOOP]], label [[EXIT:%.*]]
42 ; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[IV]], [[LOOP]] ]
43 ; CHECK-NEXT: ret i64 [[IV_LCSSA]]
46 %lengthA = call i32 @length(i8* %arrA)
47 %lengthB = call i16 @short_length(i8* %arrB)
51 %iv = phi i64 [0, %entry ], [ %iv.next, %loop ]
52 %iv.trunc.32 = trunc i64 %iv to i32
53 %iv.trunc.16 = trunc i64 %iv to i16
54 %indexA = add i32 %iv.trunc.32, %offA
55 %indexB = add i16 %iv.trunc.16, %offB
56 %rcA = icmp ult i32 %indexA, %lengthA
57 %rcB = icmp ult i16 %indexB, %lengthB
58 %wide.chk = and i1 %rcA, %rcB
59 call void (i1, ...) @llvm.experimental.guard(i1 %wide.chk, i32 9) [ "deopt"() ]
60 %indexA.ext = zext i32 %indexA to i64
61 %addrA = getelementptr inbounds i8, i8* %arrA, i64 %indexA.ext
62 %eltA = load i8, i8* %addrA
63 %indexB.ext = zext i16 %indexB to i64
64 %addrB = getelementptr inbounds i8, i8* %arrB, i64 %indexB.ext
65 store i8 %eltA, i8* %addrB
66 %iv.next = add nuw nsw i64 %iv, 1
67 %latch.check = icmp ult i64 %iv.next, 16
68 br i1 %latch.check, label %loop, label %exit
75 ; Consider an IV of type long and an array access into int array.
76 ; IV is of type i64 while the range check operands are of type i32 and i64.
77 define i64 @iv_rc_different_types(i32 %offA, i32 %offB, i8* %arrA, i8* %arrB, i64 %max)
78 ; CHECK-LABEL: @iv_rc_different_types(
80 ; CHECK-NEXT: [[LENGTHA:%.*]] = call i32 @length(i8* [[ARRA:%.*]])
81 ; CHECK-NEXT: [[LENGTHB:%.*]] = call i32 @length(i8* [[ARRB:%.*]])
82 ; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LENGTHB]], -1
83 ; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[OFFB:%.*]]
84 ; CHECK-NEXT: [[TMP2:%.*]] = icmp ule i32 15, [[TMP1]]
85 ; CHECK-NEXT: [[TMP3:%.*]] = icmp ult i32 [[OFFB]], [[LENGTHB]]
86 ; CHECK-NEXT: [[TMP4:%.*]] = and i1 [[TMP3]], [[TMP2]]
87 ; CHECK-NEXT: [[TMP5:%.*]] = add i64 [[MAX:%.*]], -1
88 ; CHECK-NEXT: [[TMP6:%.*]] = icmp ule i64 15, [[TMP5]]
89 ; CHECK-NEXT: [[TMP7:%.*]] = icmp ult i64 0, [[MAX]]
90 ; CHECK-NEXT: [[TMP8:%.*]] = and i1 [[TMP7]], [[TMP6]]
91 ; CHECK-NEXT: [[TMP9:%.*]] = add i32 [[LENGTHA]], -1
92 ; CHECK-NEXT: [[TMP10:%.*]] = sub i32 [[TMP9]], [[OFFA:%.*]]
93 ; CHECK-NEXT: [[TMP11:%.*]] = icmp ule i32 15, [[TMP10]]
94 ; CHECK-NEXT: [[TMP12:%.*]] = icmp ult i32 [[OFFA]], [[LENGTHA]]
95 ; CHECK-NEXT: [[TMP13:%.*]] = and i1 [[TMP12]], [[TMP11]]
96 ; CHECK-NEXT: [[TMP14:%.*]] = and i1 [[TMP4]], [[TMP8]]
97 ; CHECK-NEXT: [[TMP15:%.*]] = and i1 [[TMP14]], [[TMP13]]
98 ; CHECK-NEXT: br label [[LOOP:%.*]]
100 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
101 ; CHECK-NEXT: [[IV_TRUNC:%.*]] = trunc i64 [[IV]] to i32
102 ; CHECK-NEXT: [[INDEXA:%.*]] = add i32 [[IV_TRUNC]], [[OFFA]]
103 ; CHECK-NEXT: [[INDEXB:%.*]] = add i32 [[IV_TRUNC]], [[OFFB]]
104 ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP15]], i32 9) [ "deopt"() ]
105 ; CHECK-NEXT: [[INDEXA_EXT:%.*]] = zext i32 [[INDEXA]] to i64
106 ; CHECK-NEXT: [[ADDRA:%.*]] = getelementptr inbounds i8, i8* [[ARRA]], i64 [[INDEXA_EXT]]
107 ; CHECK-NEXT: [[ELTA:%.*]] = load i8, i8* [[ADDRA]]
108 ; CHECK-NEXT: [[INDEXB_EXT:%.*]] = zext i32 [[INDEXB]] to i64
109 ; CHECK-NEXT: [[ADDRB:%.*]] = getelementptr inbounds i8, i8* [[ARRB]], i64 [[INDEXB_EXT]]
110 ; CHECK-NEXT: [[ELTB:%.*]] = load i8, i8* [[ADDRB]]
111 ; CHECK-NEXT: [[RESULT:%.*]] = xor i8 [[ELTA]], [[ELTB]]
112 ; CHECK-NEXT: store i8 [[RESULT]], i8* [[ADDRA]]
113 ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
114 ; CHECK-NEXT: [[LATCH_CHECK:%.*]] = icmp ult i64 [[IV]], 15
115 ; CHECK-NEXT: br i1 [[LATCH_CHECK]], label [[LOOP]], label [[EXIT:%.*]]
117 ; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[IV]], [[LOOP]] ]
118 ; CHECK-NEXT: ret i64 [[IV_LCSSA]]
122 %lengthA = call i32 @length(i8* %arrA)
123 %lengthB = call i32 @length(i8* %arrB)
127 %iv = phi i64 [0, %entry ], [ %iv.next, %loop ]
128 %iv.trunc = trunc i64 %iv to i32
129 %indexA = add i32 %iv.trunc, %offA
130 %indexB = add i32 %iv.trunc, %offB
131 %rcA = icmp ult i32 %indexA, %lengthA
132 %rcIV = icmp ult i64 %iv, %max
133 %wide.chk = and i1 %rcA, %rcIV
134 %rcB = icmp ult i32 %indexB, %lengthB
135 %wide.chk.final = and i1 %wide.chk, %rcB
136 call void (i1, ...) @llvm.experimental.guard(i1 %wide.chk.final, i32 9) [ "deopt"() ]
137 %indexA.ext = zext i32 %indexA to i64
138 %addrA = getelementptr inbounds i8, i8* %arrA, i64 %indexA.ext
139 %eltA = load i8, i8* %addrA
140 %indexB.ext = zext i32 %indexB to i64
141 %addrB = getelementptr inbounds i8, i8* %arrB, i64 %indexB.ext
142 %eltB = load i8, i8* %addrB
143 %result = xor i8 %eltA, %eltB
144 store i8 %result, i8* %addrA
145 %iv.next = add nuw nsw i64 %iv, 1
146 %latch.check = icmp ult i64 %iv, 15
147 br i1 %latch.check, label %loop, label %exit
153 ; cannot narrow the IV to the range type, because we lose information.
154 ; for (i64 i= 5; i>= 2; i++)
155 ; this loop wraps around after reaching 2^64.
156 define i64 @iv_rc_different_type(i32 %offA, i8* %arrA) {
157 ; CHECK-LABEL: @iv_rc_different_type(
159 ; CHECK-NEXT: [[LENGTHA:%.*]] = call i32 @length(i8* [[ARRA:%.*]])
160 ; CHECK-NEXT: br label [[LOOP:%.*]]
162 ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 5, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
163 ; CHECK-NEXT: [[IV_TRUNC_32:%.*]] = trunc i64 [[IV]] to i32
164 ; CHECK-NEXT: [[INDEXA:%.*]] = add i32 [[IV_TRUNC_32]], [[OFFA:%.*]]
165 ; CHECK-NEXT: [[RCA:%.*]] = icmp ult i32 [[INDEXA]], [[LENGTHA]]
166 ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[RCA]], i32 9) [ "deopt"() ]
167 ; CHECK-NEXT: [[INDEXA_EXT:%.*]] = zext i32 [[INDEXA]] to i64
168 ; CHECK-NEXT: [[ADDRA:%.*]] = getelementptr inbounds i8, i8* [[ARRA]], i64 [[INDEXA_EXT]]
169 ; CHECK-NEXT: [[ELTA:%.*]] = load i8, i8* [[ADDRA]]
170 ; CHECK-NEXT: [[RES:%.*]] = add i8 [[ELTA]], 2
171 ; CHECK-NEXT: store i8 [[ELTA]], i8* [[ADDRA]]
172 ; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
173 ; CHECK-NEXT: [[LATCH_CHECK:%.*]] = icmp sge i64 [[IV_NEXT]], 2
174 ; CHECK-NEXT: br i1 [[LATCH_CHECK]], label [[LOOP]], label [[EXIT:%.*]]
176 ; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[IV]], [[LOOP]] ]
177 ; CHECK-NEXT: ret i64 [[IV_LCSSA]]
180 %lengthA = call i32 @length(i8* %arrA)
184 %iv = phi i64 [ 5, %entry ], [ %iv.next, %loop ]
185 %iv.trunc.32 = trunc i64 %iv to i32
186 %indexA = add i32 %iv.trunc.32, %offA
187 %rcA = icmp ult i32 %indexA, %lengthA
188 call void (i1, ...) @llvm.experimental.guard(i1 %rcA, i32 9) [ "deopt"() ]
189 %indexA.ext = zext i32 %indexA to i64
190 %addrA = getelementptr inbounds i8, i8* %arrA, i64 %indexA.ext
191 %eltA = load i8, i8* %addrA
192 %res = add i8 %eltA, 2
193 store i8 %eltA, i8* %addrA
194 %iv.next = add i64 %iv, 1
195 %latch.check = icmp sge i64 %iv.next, 2
196 br i1 %latch.check, label %loop, label %exit