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