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
|
; RUN: opt < %s -instcombine -S | grep "phi i32" | count 2
define void @test() nounwind {
entry:
br label %bb
bb: ; preds = %bb16, %entry
%i.0 = phi i32 [ 0, %entry ], [ %indvar.next, %somebb ] ; <i32> [#uses=1]
%x.0 = phi i32 [ 37, %entry ], [ %tmp17, %somebb ] ; <i32> [#uses=1]
%tmp = tail call i32 (...) @bork( ) nounwind ; <i32> [#uses=0]
%tmp1 = tail call i32 (...) @bork( ) nounwind ; <i32> [#uses=0]
%tmp2 = tail call i32 (...) @bork( ) nounwind ; <i32> [#uses=1]
%tmp3 = icmp eq i32 %tmp2, 0 ; <i1> [#uses=1]
br i1 %tmp3, label %bb7, label %bb5
bb5: ; preds = %bb
%tmp6 = tail call i32 (...) @bork( ) nounwind ; <i32> [#uses=0]
br label %bb7
bb7: ; preds = %bb5, %bb
%tmp8 = tail call i32 (...) @bork( ) nounwind ; <i32> [#uses=0]
%tmp9 = tail call i32 (...) @bork( ) nounwind ; <i32> [#uses=0]
%tmp11 = icmp eq i32 %x.0, 37 ; <i1> [#uses=1]
br i1 %tmp11, label %bb14, label %bb16
bb14: ; preds = %bb7
%tmp15 = tail call i32 (...) @bar( ) nounwind ; <i32> [#uses=0]
br label %bb16
bb16: ; preds = %bb14, %bb7
%tmp17 = tail call i32 (...) @zap( ) nounwind ; <i32> [#uses=1]
%indvar.next = add i32 %i.0, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, 42 ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %somebb
somebb:
br label %bb
return: ; preds = %bb16
ret void
}
declare i32 @bork(...)
declare i32 @bar(...)
declare i32 @zap(...)
|
