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>
36 %phitmp = sext i32 %tmp8 to i64 ; <i64> [#uses=1]
38 ; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%bb>
39 %tmp9 = getelementptr double, double* %p, i64 %phitmp ; <double*> [#uses=1]
41 ; CHECK-NEXT: --> {(8 + %p),+,8}<%bb>
42 %tmp10 = load double, double* %tmp9, align 8 ; <double> [#uses=1]
43 %tmp11 = fcmp ogt double %tmp10, 2.000000e+00 ; <i1> [#uses=1]
44 br i1 %tmp11, label %bb, label %bb1.return_crit_edge
46 bb1.return_crit_edge: ; preds = %bb1
49 return: ; preds = %bb1.return_crit_edge, %entry
53 ; CHECK: Classifying expressions for: @test2
54 define void @test2(i32* %begin, i32* %end) ssp {
56 %cmp1.i.i = icmp eq i32* %begin, %end
57 br i1 %cmp1.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.lr.ph.i.i
59 for.body.lr.ph.i.i: ; preds = %entry
60 br label %for.body.i.i
62 for.body.i.i: ; preds = %for.body.i.i, %for.body.lr.ph.i.i
63 %__first.addr.02.i.i = phi i32* [ %begin, %for.body.lr.ph.i.i ], [ %ptrincdec.i.i, %for.body.i.i ]
64 ; CHECK: %__first.addr.02.i.i
65 ; CHECK-NEXT: --> {%begin,+,4}<nuw><%for.body.i.i>
66 store i32 0, i32* %__first.addr.02.i.i, align 4
67 %ptrincdec.i.i = getelementptr inbounds i32, i32* %__first.addr.02.i.i, i64 1
68 ; CHECK: %ptrincdec.i.i
69 ; CHECK-NEXT: --> {(4 + %begin),+,4}<nuw><%for.body.i.i>
70 %cmp.i.i = icmp eq i32* %ptrincdec.i.i, %end
71 br i1 %cmp.i.i, label %for.cond.for.end_crit_edge.i.i, label %for.body.i.i
73 for.cond.for.end_crit_edge.i.i: ; preds = %for.body.i.i
74 br label %_ZSt4fillIPiiEvT_S1_RKT0_.exit
76 _ZSt4fillIPiiEvT_S1_RKT0_.exit: ; preds = %entry, %for.cond.for.end_crit_edge.i.i
80 ; Various checks for inbounds geps.
81 define void @test3(i32* %begin, i32* %end) nounwind ssp {
83 %cmp7.i.i = icmp eq i32* %begin, %end
84 br i1 %cmp7.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.i.i
86 for.body.i.i: ; preds = %entry, %for.body.i.i
87 %indvar.i.i = phi i64 [ %tmp, %for.body.i.i ], [ 0, %entry ]
89 ; CHECK: {0,+,1}<nuw><nsw><%for.body.i.i>
90 %tmp = add nsw i64 %indvar.i.i, 1
92 ; CHECK: {1,+,1}<nuw><nsw><%for.body.i.i>
93 %ptrincdec.i.i = getelementptr inbounds i32, i32* %begin, i64 %tmp
94 ; CHECK: %ptrincdec.i.i =
95 ; CHECK: {(4 + %begin),+,4}<nsw><%for.body.i.i>
96 %__first.addr.08.i.i = getelementptr inbounds i32, i32* %begin, i64 %indvar.i.i
97 ; CHECK: %__first.addr.08.i.i
98 ; CHECK: {%begin,+,4}<nsw><%for.body.i.i>
99 store i32 0, i32* %__first.addr.08.i.i, align 4
100 %cmp.i.i = icmp eq i32* %ptrincdec.i.i, %end
101 br i1 %cmp.i.i, label %_ZSt4fillIPiiEvT_S1_RKT0_.exit, label %for.body.i.i
102 ; CHECK: Loop %for.body.i.i: backedge-taken count is ((-4 + (-1 * %begin) + %end) /u 4)
103 ; CHECK: Loop %for.body.i.i: max backedge-taken count is ((-4 + (-1 * %begin) + %end) /u 4)
104 _ZSt4fillIPiiEvT_S1_RKT0_.exit: ; preds = %for.body.i.i, %entry
108 ; A single AddExpr exists for (%a + %b), which is not always <nsw>.
110 ; CHECK-NOT: --> (%a + %b)<nsw>
111 define i32 @addnsw(i32 %a, i32 %b) nounwind ssp {
113 %tmp = add i32 %a, %b
114 %cmp = icmp sgt i32 %tmp, 0
115 br i1 %cmp, label %greater, label %exit
118 %tmp2 = add nsw i32 %a, %b
122 %result = phi i32 [ %a, %entry ], [ %tmp2, %greater ]
126 ; CHECK-LABEL: PR12375
127 ; CHECK: --> {(4 + %arg),+,4}<nuw><%bb1>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: (8 + %arg)<nsw>
128 define i32 @PR12375(i32* readnone %arg) {
130 %tmp = getelementptr inbounds i32, i32* %arg, i64 2
133 bb1: ; preds = %bb1, %bb
134 %tmp2 = phi i32* [ %arg, %bb ], [ %tmp5, %bb1 ]
135 %tmp3 = phi i32 [ 0, %bb ], [ %tmp4, %bb1 ]
136 %tmp4 = add nsw i32 %tmp3, 1
137 %tmp5 = getelementptr inbounds i32, i32* %tmp2, i64 1
138 %tmp6 = icmp ult i32* %tmp5, %tmp
139 br i1 %tmp6, label %bb1, label %bb7
145 ; CHECK-LABEL: PR12376
146 ; CHECK: --> {(4 + %arg),+,4}<nuw><%bb2>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: (4 + (4 * ((3 + (-1 * %arg) + (%arg umax %arg1)) /u 4)) + %arg)
147 define void @PR12376(i32* nocapture %arg, i32* nocapture %arg1) {
151 bb2: ; preds = %bb2, %bb
152 %tmp = phi i32* [ %arg, %bb ], [ %tmp4, %bb2 ]
153 %tmp3 = icmp ult i32* %tmp, %arg1
154 %tmp4 = getelementptr inbounds i32, i32* %tmp, i64 1
155 br i1 %tmp3, label %bb2, label %bb5
163 ; CHECK-LABEL: nswnowrap
164 ; CHECK: --> {(1 + %v),+,1}<nsw><%for.body>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: (2 + %v)
165 define void @nswnowrap(i32 %v) {
167 %add = add nsw i32 %v, 1
171 %i.04 = phi i32 [ %v, %entry ], [ %inc, %for.body ]
172 %inc = add nsw i32 %i.04, 1
173 tail call void @f(i32 %i.04)
174 %cmp = icmp slt i32 %i.04, %add
175 br i1 %cmp, label %for.body, label %for.end