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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -newgvn -S | FileCheck %s
3
4
5;; Block 6 is reachable, but edge 6->4 is not
6;; This means the phi value is undef, not 0
7; Function Attrs: ssp uwtable
8define i16 @hoge() local_unnamed_addr #0 align 2 {
9; CHECK-LABEL: @hoge(
10; CHECK-NEXT:  bb:
11; CHECK-NEXT:    switch i8 undef, label [[BB7:%.*]] [
12; CHECK-NEXT:    i8 0, label [[BB1:%.*]]
13; CHECK-NEXT:    i8 12, label [[BB2:%.*]]
14; CHECK-NEXT:    ]
15; CHECK:       bb1:
16; CHECK-NEXT:    br label [[BB6:%.*]]
17; CHECK:       bb2:
18; CHECK-NEXT:    br label [[BB4:%.*]]
19; CHECK:       bb3:
20; CHECK-NEXT:    unreachable
21; CHECK:       bb4:
22; CHECK-NEXT:    ret i16 undef
23; CHECK:       bb6:
24; CHECK-NEXT:    br i1 true, label [[BB3:%.*]], label [[BB4]], !llvm.loop !1
25; CHECK:       bb7:
26; CHECK-NEXT:    unreachable
27;
28bb:
29  switch i8 undef, label %bb7 [
30  i8 0, label %bb1
31  i8 12, label %bb2
32  ]
33
34bb1:                                              ; preds = %bb
35  br label %bb6
36
37bb2:                                              ; preds = %bb
38  br label %bb4
39
40bb3:                                              ; preds = %bb6
41  unreachable
42
43bb4:                                              ; preds = %bb6, %bb2
44  %tmp = phi i16 [ 0, %bb6 ], [ undef, %bb2 ]
45  ret i16 %tmp
46
47bb6:                                              ; preds = %bb4
48  br i1 true, label %bb3, label %bb4, !llvm.loop !1
49
50bb7:                                              ; preds = %bb
51  unreachable
52}
53
54attributes #0 = { ssp uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
55
56!llvm.ident = !{!0}
57
58!0 = !{!"clang version 5.0.0 (http://llvm.org/git/clang.git a8b933d4d1d133594fdaed35ee5814514b738f6d) (/Users/dannyb/sources/llvm-clean fc630a9b5613f544c07a8f16abcc173793df62cf)"}
59!1 = distinct !{!1, !2}
60!2 = !{!"llvm.loop.unroll.disable"}
61