1; RUN: llc -march=hexagon -hexagon-initial-cfg-cleanup=0 < %s | FileCheck %s
2; REQUIRES: asserts
3
4; When tail-duplicating a block with PHI nodes that use subregisters, the
5; subregisters were dropped by the tail duplicator, resulting in invalid
6; COPY instructions being generated.
7
8; CHECK: = asl(r{{[0-9]+}}:{{[0-9]+}},#15)
9
10target triple = "hexagon"
11
12%struct.0 = type { i64, i16 }
13%struct.1 = type { i64, i64 }
14
15declare hidden fastcc void @foo(%struct.0* noalias nocapture, i8 signext, i8 zeroext, i32, i64, i64) unnamed_addr #0
16
17define void @fred(%struct.0* noalias nocapture sret %agg.result, %struct.1* byval nocapture readonly align 8 %a, i32 %a0) #1 {
18entry:
19  %0 = load i64, i64* undef, align 8
20  switch i32 %a0, label %if.else [
21    i32 32767, label %if.then
22    i32 0, label %if.then7
23  ]
24
25if.then:                                          ; preds = %entry
26  ret void
27
28if.then7:                                         ; preds = %entry
29  br i1 undef, label %if.then.i, label %if.else16.i
30
31if.then.i:                                        ; preds = %if.then7
32  br i1 undef, label %if.then5.i, label %if.else.i
33
34if.then5.i:                                       ; preds = %if.then.i
35  %shl.i21 = shl i64 %0, 0
36  br label %if.end.i
37
38if.else.i:                                        ; preds = %if.then.i
39  %shl12.i = shl i64 %0, 7
40  br label %if.end.i
41
42if.end.i:                                         ; preds = %if.else.i, %if.then5.i
43  %aSig0.0 = phi i64 [ undef, %if.then5.i ], [ %shl12.i, %if.else.i ]
44  %storemerge43.i = phi i64 [ %shl.i21, %if.then5.i ], [ 0, %if.else.i ]
45  %sub15.i = sub nsw i32 -63, 8
46  br label %if.end13
47
48if.else16.i:                                      ; preds = %if.then7
49  br label %if.end13
50
51if.else:                                          ; preds = %entry
52  %or12 = or i64 9, 281474976710656
53  br label %if.end13
54
55if.end13:                                         ; preds = %if.else, %if.else16.i, %if.end.i
56  %aSig1.1 = phi i64 [ %0, %if.else ], [ %storemerge43.i, %if.end.i ], [ undef, %if.else16.i ]
57  %aSig0.2 = phi i64 [ %or12, %if.else ], [ %aSig0.0, %if.end.i ], [ undef, %if.else16.i ]
58  %aExp.0 = phi i32 [ undef, %if.else ], [ %sub15.i, %if.end.i ], [ undef, %if.else16.i ]
59  %shl2.i = shl i64 %aSig0.2, 15
60  %shr.i = lshr i64 %aSig1.1, 49
61  %or.i = or i64 %shl2.i, %shr.i
62  tail call fastcc void @foo(%struct.0* noalias %agg.result, i8 signext 80, i8 zeroext undef, i32 %aExp.0, i64 %or.i, i64 undef)
63  unreachable
64}
65
66attributes #0 = { norecurse nounwind }
67attributes #1 = { nounwind }
68