1 ; RUN: opt < %s -analyze -scalar-evolution -scalar-evolution-max-iterations=0 | FileCheck %s
2 ; RUN: opt < %s -passes='print<scalar-evolution>' -disable-output 2>&1 | FileCheck %s
5 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
6 target triple = "x86_64-unknown-linux-gnu"
8 @A = weak global [1000 x i32] zeroinitializer, align 32
10 ; CHECK-LABEL: Determining loop execution counts for: @test1
11 ; CHECK: backedge-taken count is 10000
13 define void @test1(i32 %N) {
18 %tmp = getelementptr [1000 x i32], [1000 x i32]* @A, i32 0, i32 %i.0 ; <i32*> [#uses=1]
19 store i32 123, i32* %tmp
20 %tmp2 = add i32 %i.0, 1 ; <i32> [#uses=1]
23 bb3: ; preds = %bb, %entry
24 %i.0 = phi i32 [ 0, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=3]
25 %tmp3 = icmp sle i32 %i.0, 9999 ; <i1> [#uses=1]
26 br i1 %tmp3, label %bb, label %bb5
31 return: ; preds = %bb5
36 ; CHECK-LABEL: Classifying expressions for: @test2
37 ; CHECK: %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ]
38 ; CHECK-NEXT: --> {-1,+,2}<%preheader> U: full-set S: full-set Exits: 13
42 %bins = alloca [16 x i64], align 16
43 %0 = bitcast [16 x i64]* %bins to i8*
44 call void @llvm.memset.p0i8.i64(i8* align 16 %0, i8 0, i64 128, i1 false)
47 preheader: ; preds = %for.inc.1, %entry
48 %v11 = phi i64 [ 0, %entry ], [ %next12.1, %for.inc.1 ]
49 %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ]
50 %cmp = icmp sgt i64 %v11, 0
51 br i1 %cmp, label %for.body, label %for.inc
53 for.body: ; preds = %preheader
54 %zext = zext i32 %iv to i64
55 %arrayidx = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %v11
56 %loaded = load i64, i64* %arrayidx, align 8
57 %add = add i64 %loaded, 1
58 %add2 = add i64 %add, %zext
59 store i64 %add2, i64* %arrayidx, align 8
62 for.inc: ; preds = %for.body, %preheader
63 %next12 = add nuw nsw i64 %v11, 1
64 %next = add nsw i32 %iv, 1
65 br i1 true, label %for.body.1, label %for.inc.1
67 end: ; preds = %for.inc.1
68 %arrayidx8 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 2
69 %load = load i64, i64* %arrayidx8, align 16
70 %shr4 = lshr i64 %load, 32
71 %conv = trunc i64 %shr4 to i32
74 for.body.1: ; preds = %for.inc
75 %zext.1 = zext i32 %next to i64
76 %arrayidx.1 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %next12
77 %loaded.1 = load i64, i64* %arrayidx.1, align 8
78 %add.1 = add i64 %loaded.1, 1
79 %add2.1 = add i64 %add.1, %zext.1
80 store i64 %add2.1, i64* %arrayidx.1, align 8
83 for.inc.1: ; preds = %for.body.1, %for.inc
84 %next12.1 = add nuw nsw i64 %next12, 1
85 %next.1 = add nuw nsw i32 %next, 1
86 %exitcond.1 = icmp eq i64 %next12.1, 16
87 br i1 %exitcond.1, label %end, label %preheader
90 ; Function Attrs: nounwind
91 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) #0
93 declare void @may_exit() nounwind
95 define void @pr28012(i32 %n) {
96 ; CHECK-LABEL: Classifying expressions for: @pr28012
97 ; CHECK: Loop %loop: backedge-taken count is -1431655751
98 ; CHECK: Loop %loop: max backedge-taken count is -1431655751
99 ; CHECK: Loop %loop: Predicated backedge-taken count is -1431655751
105 %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
106 %iv.inc = add nsw i32 %iv, 3
107 call void @may_exit()
108 %becond = icmp ne i32 %iv.inc, 46
109 br i1 %becond, label %loop, label %leave