1; RUN: opt -inline -instcombine -S < %s
2; PR12967
3
4target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
5target triple = "x86_64-apple-macosx10.7.0"
6
7@d = common global i32 0, align 4
8@c = common global i32 0, align 4
9@e = common global i32 0, align 4
10@f = common global i32 0, align 4
11@a = common global i32 0, align 4
12@b = common global i32 0, align 4
13
14define signext i8 @fn1(i32 %p1) nounwind uwtable readnone ssp {
15entry:
16  %shr = lshr i32 1, %p1
17  %conv = trunc i32 %shr to i8
18  ret i8 %conv
19}
20
21define void @fn4() nounwind uwtable ssp {
22entry:
23  %0 = load i32* @d, align 4
24  %cmp = icmp eq i32 %0, 0
25  %conv = zext i1 %cmp to i32
26  store i32 %conv, i32* @c, align 4
27  tail call void @fn3(i32 %conv) nounwind
28  ret void
29}
30
31define void @fn3(i32 %p1) nounwind uwtable ssp {
32entry:
33  %and = and i32 %p1, 8
34  store i32 %and, i32* @e, align 4
35  %sub = add nsw i32 %and, -1
36  store i32 %sub, i32* @f, align 4
37  %0 = load i32* @a, align 4
38  %tobool = icmp eq i32 %0, 0
39  br i1 %tobool, label %if.else, label %if.then
40
41if.then:                                          ; preds = %entry
42  %1 = load i32* @b, align 4
43  %.lobit = lshr i32 %1, 31
44  %2 = trunc i32 %.lobit to i8
45  %.not = xor i8 %2, 1
46  br label %if.end
47
48if.else:                                          ; preds = %entry
49  %call = tail call signext i8 @fn1(i32 %sub) nounwind
50  br label %if.end
51
52if.end:                                           ; preds = %if.else, %if.then
53  %storemerge.in = phi i8 [ %call, %if.else ], [ %.not, %if.then ]
54  %storemerge = sext i8 %storemerge.in to i32
55  store i32 %storemerge, i32* @b, align 4
56  ret void
57}
58