1; RUN: opt < %s -simplifycfg -S | FileCheck %s
2
3; a, b;
4; fn1() {
5;   if (b)
6;     if (a == 0 || a == 5)
7;       return a;
8;   return 0;
9; }
10
11; Checking that we handle correctly the case when we have a switch
12; branching multiple times to the same block
13
14@b = common global i32 0, align 4
15@a = common global i32 0, align 4
16
17; Function Attrs: nounwind
18define i32 @fn1() {
19; CHECK-LABEL: @fn1
20; CHECK: %switch.selectcmp1 = icmp eq i32 %1, 5
21; CHECK: %switch.select2 = select i1 %switch.selectcmp1, i32 5, i32 %switch.select
22entry:
23  %0 = load i32* @b, align 4
24  %tobool = icmp eq i32 %0, 0
25  br i1 %tobool, label %if.end3, label %if.then
26
27if.then:
28  %1 = load i32* @a, align 4
29  switch i32 %1, label %if.end3 [
30    i32 5, label %return
31    i32 0, label %return
32  ]
33
34if.end3:
35  br label %return
36
37return:
38  %retval.0 = phi i32 [ 0, %if.end3 ], [ %1, %if.then ], [ %1, %if.then ]
39  ret i32 %retval.0
40}
41