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