1 ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
3 ; The addrecs in this loop are analyzable only by using nsw information.
5 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64"
7 ; CHECK: Classifying expressions for: @test1
8 define void @test1(double* %p) nounwind {
10 %tmp = load double, double* %p, align 8 ; <double> [#uses=1]
11 %tmp1 = fcmp ogt double %tmp, 2.000000e+00 ; <i1> [#uses=1]
12 br i1 %tmp1, label %bb.nph, label %return
14 bb.nph: ; preds = %entry
17 bb: ; preds = %bb1, %bb.nph
18 %i.01 = phi i32 [ %tmp8, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=3]
20 ; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%bb>
21 %tmp2 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
22 %tmp3 = getelementptr double, double* %p, i64 %tmp2 ; <double*> [#uses=1]
23 %tmp4 = load double, double* %tmp3, align 8 ; <double> [#uses=1]
24 %tmp5 = fmul double %tmp4, 9.200000e+00 ; <double> [#uses=1]
25 %tmp6 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
26 %tmp7 = getelementptr double, double* %p, i64 %tmp6 ; <double*> [#uses=1]
28 ; CHECK-NEXT: --> {%p,+,8}<%bb>
29 store double %tmp5, double* %tmp7, align 8
30 %tmp8 = add nsw i32 %i.01, 1 ; <i32> [#uses=2]
32 ; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%bb>
33 %p.gep = getelementptr double, double* %p, i32 %tmp8
34 %p.val = load double, double* %p.gep
38 %phitmp = sext i32 %tmp8 to i64 ; <i64> [#uses=1]
40 ; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%bb>
41 %tmp9 = getelementptr inbounds double, double* %p, i64 %phitmp ; <double*> [#uses=1]
43 ; CHECK-NEXT: --> {(8 + %p)<nsw>,+,8}<nsw><%bb>
44 %tmp10 = load double, double* %tmp9, align 8 ; <double> [#uses=1]
45 %tmp11 = fcmp ogt double %tmp10, 2.000000e+00 ; <i1> [#uses=1]
46 br i1 %tmp11, label %bb, label %bb1.return_crit_edge
48 bb1.return_crit_edge: ; preds = %bb1
51 return: ; preds = %bb1.return_crit_edge, %entry
55 ; CHECK: Classifying expressions for: @test2
56 define void @test2(i32* %begin, i32* %end) ssp {
58 %cmp1.i.i = icmp eq i32* %begin, %end
59 br i1 %cmp1.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.lr.ph.i.i
61 for.body.lr.ph.i.i: ; preds = %entry
62 br label %for.body.i.i
64 for.body.i.i: ; preds = %for.body.i.i, %for.body.lr.ph.i.i
65 %__first.addr.02.i.i = phi i32* [ %begin, %for.body.lr.ph.i.i ], [ %ptrincdec.i.i, %for.body.i.i ]
66 ; CHECK: %__first.addr.02.i.i
67 ; CHECK-NEXT: --> {%begin,+,4}<nuw><%for.body.i.i>
68 store i32 0, i32* %__first.addr.02.i.i, align 4
69 %ptrincdec.i.i = getelementptr inbounds i32, i32* %__first.addr.02.i.i, i64 1
70 ; CHECK: %ptrincdec.i.i
71 ; CHECK-NEXT: --> {(4 + %begin)<nsw>,+,4}<nuw><%for.body.i.i>
72 %cmp.i.i = icmp eq i32* %ptrincdec.i.i, %end
73 br i1 %cmp.i.i, label %for.cond.for.end_crit_edge.i.i, label %for.body.i.i
75 for.cond.for.end_crit_edge.i.i: ; preds = %for.body.i.i
76 br label %_ZSt4fillIPiiEvT_S1_RKT0_.exit
78 _ZSt4fillIPiiEvT_S1_RKT0_.exit: ; preds = %entry, %for.cond.for.end_crit_edge.i.i
82 ; Various checks for inbounds geps.
83 define void @test3(i32* %begin, i32* %end) nounwind ssp {
85 %cmp7.i.i = icmp eq i32* %begin, %end
86 br i1 %cmp7.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.i.i
88 for.body.i.i: ; preds = %entry, %for.body.i.i
89 %indvar.i.i = phi i64 [ %tmp, %for.body.i.i ], [ 0, %entry ]
91 ; CHECK: {0,+,1}<nuw><nsw><%for.body.i.i>
92 %tmp = add nsw i64 %indvar.i.i, 1
94 ; CHECK: {1,+,1}<nuw><nsw><%for.body.i.i>
95 %ptrincdec.i.i = getelementptr inbounds i32, i32* %begin, i64 %tmp
96 ; CHECK: %ptrincdec.i.i =
97 ; CHECK: {(4 + %begin)<nsw>,+,4}<nsw><%for.body.i.i>
98 %__first.addr.08.i.i = getelementptr inbounds i32, i32* %begin, i64 %indvar.i.i
99 ; CHECK: %__first.addr.08.i.i
100 ; CHECK: {%begin,+,4}<nsw><%for.body.i.i>
101 store i32 0, i32* %__first.addr.08.i.i, align 4
102 %cmp.i.i = icmp eq i32* %ptrincdec.i.i, %end
103 br i1 %cmp.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.i.i
104 ; CHECK: Loop %for.body.i.i: backedge-taken count is ((-4 + (-1 * %begin) + %end) /u 4)
105 ; CHECK: Loop %for.body.i.i: max backedge-taken count is 4611686018427387903
106 _ZSt4fillIPiiEvT_S1_RKT0_.exit: ; preds = %for.body.i.i, %entry
110 ; A single AddExpr exists for (%a + %b), which is not always <nsw>.
112 ; CHECK-NOT: --> (%a + %b)<nsw>
113 define i32 @addnsw(i32 %a, i32 %b) nounwind ssp {
115 %tmp = add i32 %a, %b
116 %cmp = icmp sgt i32 %tmp, 0
117 br i1 %cmp, label %greater, label %exit
120 %tmp2 = add nsw i32 %a, %b
124 %result = phi i32 [ %a, %entry ], [ %tmp2, %greater ]
128 ; CHECK-LABEL: PR12375
129 ; CHECK: --> {(4 + %arg)<nsw>,+,4}<nuw><%bb1>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: (4 + (4 * ((-1 + (-1 * %arg) + ((4 + %arg)<nsw> umax (8 + %arg)<nsw>)) /u 4))<nuw> + %arg)
130 define i32 @PR12375(i32* readnone %arg) {
132 %tmp = getelementptr inbounds i32, i32* %arg, i64 2
135 bb1: ; preds = %bb1, %bb
136 %tmp2 = phi i32* [ %arg, %bb ], [ %tmp5, %bb1 ]
137 %tmp3 = phi i32 [ 0, %bb ], [ %tmp4, %bb1 ]
138 %tmp4 = add nsw i32 %tmp3, 1
139 %tmp5 = getelementptr inbounds i32, i32* %tmp2, i64 1
140 %tmp6 = icmp ult i32* %tmp5, %tmp
141 br i1 %tmp6, label %bb1, label %bb7
147 ; CHECK-LABEL: PR12376
148 ; CHECK: --> {(4 + %arg)<nsw>,+,4}<nuw><%bb2>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: (4 + (4 * ((-1 + (-1 * %arg) + ((4 + %arg)<nsw> umax %arg1)) /u 4))<nuw> + %arg)
149 define void @PR12376(i32* nocapture %arg, i32* nocapture %arg1) {
153 bb2: ; preds = %bb2, %bb
154 %tmp = phi i32* [ %arg, %bb ], [ %tmp4, %bb2 ]
155 %tmp4 = getelementptr inbounds i32, i32* %tmp, i64 1
156 %tmp3 = icmp ult i32* %tmp4, %arg1
157 br i1 %tmp3, label %bb2, label %bb5
165 ; CHECK-LABEL: nswnowrap
166 ; CHECK: --> {(1 + %v)<nsw>,+,1}<nsw><%for.body>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: (1 + ((1 + %v)<nsw> smax %v))
167 define void @nswnowrap(i32 %v, i32* %buf) {
169 %add = add nsw i32 %v, 1
173 %i.04 = phi i32 [ %v, %entry ], [ %inc, %for.body ]
174 %inc = add nsw i32 %i.04, 1
175 %buf.gep = getelementptr inbounds i32, i32* %buf, i32 %inc
176 %buf.val = load i32, i32* %buf.gep
177 %cmp = icmp slt i32 %i.04, %add
178 tail call void @f(i32 %i.04)
179 br i1 %cmp, label %for.body, label %for.end
185 ; This test checks if no-wrap flags are propagated when folding {S,+,X}+T ==> {S+T,+,X}
188 ; CHECK-NEXT: --> {(-2 + (sext i32 %arg to i64))<nsw>,+,1}<nsw><%for.body>
189 define void @test4(i32 %arg) {
191 %array = alloca [10 x i32], align 4
195 %index = phi i32 [ %inc5, %for.body ], [ %arg, %entry ]
196 %sub = add nsw i32 %index, -2
197 %idxprom = sext i32 %sub to i64
198 %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %array, i64 0, i64 %idxprom
199 %data = load i32, i32* %arrayidx, align 4
200 %inc5 = add nsw i32 %index, 1
201 %cmp2 = icmp slt i32 %inc5, 10
202 br i1 %cmp2, label %for.body, label %for.end
209 define void @bad_postinc_nsw_a(i32 %n) {
210 ; CHECK-LABEL: Classifying expressions for: @bad_postinc_nsw_a
215 %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
216 %iv.inc = add nsw i32 %iv, 7
217 ; CHECK: %iv.inc = add nsw i32 %iv, 7
218 ; CHECK-NEXT: --> {7,+,7}<nuw><%loop>
219 %becond = icmp ult i32 %iv, %n
220 br i1 %becond, label %loop, label %leave
226 define void @bad_postinc_nsw_b(i32 %n) {
227 ; CHECK-LABEL: Classifying expressions for: @bad_postinc_nsw_b
232 %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
233 %iv.inc = add nsw i32 %iv, 7
234 %iv.inc.and = and i32 %iv.inc, 0
235 ; CHECK: %iv.inc = add nsw i32 %iv, 7
236 ; CHECK-NEXT: --> {7,+,7}<nuw><%loop>
237 %becond = icmp ult i32 %iv.inc.and, %n
238 br i1 %becond, label %loop, label %leave
244 declare void @may_exit() nounwind
246 define void @pr28012(i32 %n) {
247 ; CHECK-LABEL: Classifying expressions for: @pr28012
252 %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
253 %iv.inc = add nsw i32 %iv, 7
254 ; CHECK: %iv.inc = add nsw i32 %iv, 7
255 ; CHECK-NEXT: --> {7,+,7}<nuw><%loop>
256 %becond = icmp ult i32 %iv.inc, %n
257 call void @may_exit()
258 br i1 %becond, label %loop, label %leave