1 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
2 ; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0 -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
6 @A = weak global [1000 x i32] zeroinitializer, align 32
8 define void @test1(i32 %N) {
10 ; CHECK-NEXT: Determining loop execution counts for: @test1
11 ; CHECK-NEXT: Loop %bb3: backedge-taken count is i32 100
12 ; CHECK-NEXT: Loop %bb3: constant max backedge-taken count is i32 100
13 ; CHECK-NEXT: Loop %bb3: symbolic max backedge-taken count is i32 100
14 ; CHECK-NEXT: Loop %bb3: Trip multiple is 101
17 %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
21 %tmp = getelementptr [1000 x i32], ptr @A, i32 0, i32 %i.0 ; <ptr> [#uses=1]
22 store i32 123, ptr %tmp
23 %tmp2 = add i32 %i.0, 1 ; <i32> [#uses=1]
26 bb3: ; preds = %bb, %entry
27 %i.0 = phi i32 [ 2, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=3]
28 %SQ = mul i32 %i.0, %i.0
29 %tmp4 = mul i32 %i.0, 2
30 %tmp5 = sub i32 %SQ, %tmp4
31 %tmp3 = icmp sle i32 %tmp5, 9999 ; <i1> [#uses=1]
32 br i1 %tmp3, label %bb, label %bb5
37 return: ; preds = %bb5
43 ; These next two used to crash.
45 define void @test2(i1 %cmp, i64 %n) {
46 ; CHECK-LABEL: 'test2'
47 ; CHECK-NEXT: Determining loop execution counts for: @test2
48 ; CHECK-NEXT: Loop %for.body2: Unpredictable backedge-taken count.
49 ; CHECK-NEXT: Loop %for.body2: Unpredictable constant max backedge-taken count.
50 ; CHECK-NEXT: Loop %for.body2: Unpredictable symbolic max backedge-taken count.
51 ; CHECK-NEXT: Loop %for.body1: Unpredictable backedge-taken count.
52 ; CHECK-NEXT: Loop %for.body1: Unpredictable constant max backedge-taken count.
53 ; CHECK-NEXT: Loop %for.body1: Unpredictable symbolic max backedge-taken count.
59 %a0.08 = phi i64 [ 0, %entry ], [ %inc512, %for.body1 ]
60 %inc512 = add i64 %a0.08, 1
61 br i1 %cmp, label %preheader, label %for.body1
67 %indvar = phi i64 [ 0, %preheader ], [ %indvar.next, %for.body2 ]
68 %tmp111 = add i64 %n, %indvar
69 %tmp114 = mul i64 %a0.08, %indvar
70 %mul542 = mul i64 %tmp114, %tmp111
71 %indvar.next = add i64 %indvar, 1
72 br i1 undef, label %end, label %for.body2
79 ; CHECK-LABEL: 'test3'
80 ; CHECK-NEXT: Determining loop execution counts for: @test3
81 ; CHECK-NEXT: Loop %for.inc479: Unpredictable backedge-taken count.
82 ; CHECK-NEXT: Loop %for.inc479: Unpredictable constant max backedge-taken count.
83 ; CHECK-NEXT: Loop %for.inc479: Unpredictable symbolic max backedge-taken count.
86 br i1 undef, label %for.cond539.preheader, label %for.inc479
89 %a2.07 = phi i32 [ %add495, %for.inc479 ], [ 0, %if.then466 ]
90 %j.36 = phi i32 [ %inc497, %for.inc479 ], [ undef, %if.then466 ]
91 %mul484 = mul nsw i32 %j.36, %j.36
92 %mul491 = mul i32 %j.36, %j.36
93 %mul493 = mul i32 %mul491, %mul484
94 %add495 = add nsw i32 %mul493, %a2.07
95 %inc497 = add nsw i32 %j.36, 1
96 br i1 undef, label %for.cond539.preheader, label %for.inc479
98 for.cond539.preheader:
103 ; We used to crash on this too.
105 define void @test4() {
106 ; CHECK-LABEL: 'test4'
107 ; CHECK-NEXT: Determining loop execution counts for: @test4
108 ; CHECK-NEXT: Loop %for.body: Unpredictable backedge-taken count.
109 ; CHECK-NEXT: Loop %for.body: Unpredictable constant max backedge-taken count.
110 ; CHECK-NEXT: Loop %for.body: Unpredictable symbolic max backedge-taken count.
115 for.body: ; preds = %for.body, %entry
116 %v2.02 = phi i64 [ 2, %entry ], [ %phitmp, %for.body ]
117 %v1.01 = phi i64 [ -2, %entry ], [ %sub1, %for.body ]
118 %sub1 = sub i64 %v1.01, %v2.02
119 %phitmp = add i64 %v2.02, 2
120 %tobool = icmp eq i64 %sub1, %phitmp
121 br i1 %tobool, label %for.end, label %for.body
123 for.end: ; preds = %for.body