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
|
; RUN: opt < %s -S -gvn-sink | FileCheck %s
; Because %tmp17 has flipped operands to its equivalents %tmp14 and %tmp7, we
; can't sink the zext as we'd need a shuffling PHI in between.
;
; Just sinking the zext isn't profitable, so ensure nothing is sunk.
; CHECK-LABEL: @hoge
; CHECK-NOT: bb18.gvnsink.split
define void @hoge() {
bb:
br i1 undef, label %bb4, label %bb11
bb4: ; preds = %bb3
br i1 undef, label %bb6, label %bb8
bb6: ; preds = %bb5
%tmp = zext i16 undef to i64
%tmp7 = add i64 %tmp, undef
br label %bb18
bb8: ; preds = %bb5
%tmp9 = zext i16 undef to i64
br label %bb18
bb11: ; preds = %bb10
br i1 undef, label %bb12, label %bb15
bb12: ; preds = %bb11
%tmp13 = zext i16 undef to i64
%tmp14 = add i64 %tmp13, undef
br label %bb18
bb15: ; preds = %bb11
%tmp16 = zext i16 undef to i64
%tmp17 = add i64 undef, %tmp16
br label %bb18
bb18: ; preds = %bb15, %bb12, %bb8, %bb6
%tmp19 = phi i64 [ %tmp7, %bb6 ], [ undef, %bb8 ], [ %tmp14, %bb12 ], [ %tmp17, %bb15 ]
unreachable
}
|
