1; RUN: opt -O3 -S < %s | FileCheck %s
2; XFAIL: *
3
4declare i32 @doo(...)
5
6; PR6627 - This whole nasty sequence should be flattened down to a single
7; 32-bit comparison.
8define void @test2(i8* %arrayidx) nounwind ssp {
9entry:
10  %xx = bitcast i8* %arrayidx to i32*
11  %x1 = load i32, i32* %xx, align 4
12  %tmp = trunc i32 %x1 to i8
13  %conv = zext i8 %tmp to i32
14  %cmp = icmp eq i32 %conv, 127
15  br i1 %cmp, label %land.lhs.true, label %if.end
16
17land.lhs.true:                                    ; preds = %entry
18  %arrayidx4 = getelementptr inbounds i8, i8* %arrayidx, i64 1
19  %tmp5 = load i8, i8* %arrayidx4, align 1
20  %conv6 = zext i8 %tmp5 to i32
21  %cmp7 = icmp eq i32 %conv6, 69
22  br i1 %cmp7, label %land.lhs.true9, label %if.end
23
24land.lhs.true9:                                   ; preds = %land.lhs.true
25  %arrayidx12 = getelementptr inbounds i8, i8* %arrayidx, i64 2
26  %tmp13 = load i8, i8* %arrayidx12, align 1
27  %conv14 = zext i8 %tmp13 to i32
28  %cmp15 = icmp eq i32 %conv14, 76
29  br i1 %cmp15, label %land.lhs.true17, label %if.end
30
31land.lhs.true17:                                  ; preds = %land.lhs.true9
32  %arrayidx20 = getelementptr inbounds i8, i8* %arrayidx, i64 3
33  %tmp21 = load i8, i8* %arrayidx20, align 1
34  %conv22 = zext i8 %tmp21 to i32
35  %cmp23 = icmp eq i32 %conv22, 70
36  br i1 %cmp23, label %if.then, label %if.end
37
38if.then:                                          ; preds = %land.lhs.true17
39  %call25 = call i32 (...) @doo()
40  br label %if.end
41
42if.end:
43  ret void
44
45; CHECK-LABEL: @test2(
46; CHECK: %x1 = load i32, i32* %xx, align 4
47; CHECK-NEXT: icmp eq i32 %x1, 1179403647
48; CHECK-NEXT: br i1 {{.*}}, label %if.then, label %if.end
49}
50
51; PR6627 - This should all be flattened down to one compare.  This is the same
52; as test2, except that the initial load is done as an i8 instead of i32, thus
53; requiring widening.
54define void @test2a(i8* %arrayidx) nounwind ssp {
55entry:
56  %x1 = load i8, i8* %arrayidx, align 4
57  %conv = zext i8 %x1 to i32
58  %cmp = icmp eq i32 %conv, 127
59  br i1 %cmp, label %land.lhs.true, label %if.end
60
61land.lhs.true:                                    ; preds = %entry
62  %arrayidx4 = getelementptr inbounds i8, i8* %arrayidx, i64 1
63  %tmp5 = load i8, i8* %arrayidx4, align 1
64  %conv6 = zext i8 %tmp5 to i32
65  %cmp7 = icmp eq i32 %conv6, 69
66  br i1 %cmp7, label %land.lhs.true9, label %if.end
67
68land.lhs.true9:                                   ; preds = %land.lhs.true
69  %arrayidx12 = getelementptr inbounds i8, i8* %arrayidx, i64 2
70  %tmp13 = load i8, i8* %arrayidx12, align 1
71  %conv14 = zext i8 %tmp13 to i32
72  %cmp15 = icmp eq i32 %conv14, 76
73  br i1 %cmp15, label %land.lhs.true17, label %if.end
74
75land.lhs.true17:                                  ; preds = %land.lhs.true9
76  %arrayidx20 = getelementptr inbounds i8, i8* %arrayidx, i64 3
77  %tmp21 = load i8, i8* %arrayidx20, align 1
78  %conv22 = zext i8 %tmp21 to i32
79  %cmp23 = icmp eq i32 %conv22, 70
80  br i1 %cmp23, label %if.then, label %if.end
81
82if.then:                                          ; preds = %land.lhs.true17
83  %call25 = call i32 (...) @doo()
84  br label %if.end
85
86if.end:
87  ret void
88
89; CHECK-LABEL: @test2a(
90; CHECK: %x1 = load i32, i32* {{.*}}, align 4
91; CHECK-NEXT: icmp eq i32 %x1, 1179403647
92; CHECK-NEXT: br i1 {{.*}}, label %if.then, label %if.end
93}
94