1 ; Check that we don't crash on corner cases.
2 ; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=10 -unroll-percent-dynamic-cost-saved-threshold=20 -o /dev/null
3 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
5 @known_constant = internal unnamed_addr constant [10 x i32] [i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1], align 16
12 %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
13 %idx = zext i32 undef to i64
14 %add.ptr = getelementptr inbounds i64, i64* null, i64 %idx
15 %inc = add nuw nsw i64 %phi, 1
16 %cmp = icmp ult i64 %inc, 999
17 br i1 %cmp, label %for.body, label %for.exit
28 %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
29 %x = getelementptr i32, <4 x i32*> undef, <4 x i32> <i32 1, i32 1, i32 1, i32 1>
30 %inc = add nuw nsw i64 %phi, 1
31 %cmp = icmp ult i64 %inc, 999
32 br i1 %cmp, label %for.body, label %for.exit
38 define void @cmp_undef() {
42 for.body: ; preds = %for.inc, %entry
43 %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ]
44 %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
45 %x1 = load i32, i32* %arrayidx1, align 4
46 %cmp = icmp eq i32 %x1, undef
47 br i1 %cmp, label %if.then, label %for.inc
49 if.then: ; preds = %for.body
52 for.inc: ; preds = %for.body, %if.then
53 %iv.1 = add nuw nsw i64 %iv.0, 1
54 %exitcond = icmp eq i64 %iv.1, 10
55 br i1 %exitcond, label %for.end, label %for.body
57 for.end: ; preds = %for.inc
61 define void @switch() {
66 %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ]
67 %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
68 %x1 = load i32, i32* %arrayidx1, align 4
69 switch i32 %x1, label %l1 [
77 %iv.1 = add nuw nsw i64 %iv.0, 1
78 %exitcond = icmp eq i64 %iv.1, 10
79 br i1 %exitcond, label %for.end, label %for.body
85 define <4 x i32> @vec_load() {
90 %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
91 %vec_phi = phi <4 x i32> [ <i32 0, i32 0, i32 0, i32 0>, %entry ], [ %r, %for.body ]
92 %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %phi
93 %bc = bitcast i32* %arrayidx to <4 x i32>*
94 %x = load <4 x i32>, < 4 x i32>* %bc, align 4
95 %r = add <4 x i32> %x, %vec_phi
96 %inc = add nuw nsw i64 %phi, 1
97 %cmp = icmp ult i64 %inc, 999
98 br i1 %cmp, label %for.body, label %for.exit