1; RUN: llc < %s
2; PR6777
3
4; MachineSink shouldn't try to sink code in unreachable blocks, as it's
5; not worthwhile, and there are corner cases which it doesn't handle.
6
7target 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"
8target triple = "x86_64-unknown-linux-gnu"
9
10define double @fn1(i8* %arg, i64 %arg1) {
11Entry:
12  br i1 undef, label %Body, label %Exit
13
14Exit:                                             ; preds = %Brancher7, %Entry
15  ret double undef
16
17Body:                                             ; preds = %Entry
18  br i1 false, label %Brancher7, label %Body3
19
20Body3:                                            ; preds = %Body6, %Body3, %Body
21  br label %Body3
22
23Body6:                                            ; preds = %Brancher7
24  %tmp = fcmp oeq double 0xC04FBB2E40000000, undef ; <i1> [#uses=1]
25  br i1 %tmp, label %Body3, label %Brancher7
26
27Brancher7:                                        ; preds = %Body6, %Body
28  %tmp2 = icmp ult i32 undef, 10                  ; <i1> [#uses=1]
29  br i1 %tmp2, label %Body6, label %Exit
30}
31