1; RUN: llc -march=hexagon -enable-pipeliner -enable-bsb-sched=0 -join-liveintervals=false < %s | FileCheck %s
2
3; XFAIL: *
4; This test is failing after post-ra machine sinking.
5
6; Test that we generate the correct Phi values when there is a Phi that
7; references another Phi. We need to examine the other Phi to get the
8; correct value. We need to do this even if we haven't generated the
9; kernel code for the other Phi yet.
10
11; CHECK: v[[REG0:[0-9]+]] = v[[REG1:[0-9]+]]
12; CHECK: loop0
13; Check for copy REG0 = REG1 (via vcombine):
14; CHECK: v{{[0-9]+}}:[[REG0]] = vcombine(v{{[0-9]+}},v[[REG1]])
15; CHECK: endloop0
16
17; Function Attrs: nounwind
18define void @f0() #0 {
19b0:
20  br i1 undef, label %b1, label %b2
21
22b1:                                               ; preds = %b1, %b0
23  %v0 = phi i32 [ %v7, %b1 ], [ 0, %b0 ]
24  %v1 = phi <16 x i32> [ %v4, %b1 ], [ undef, %b0 ]
25  %v2 = phi <16 x i32> [ %v1, %b1 ], [ undef, %b0 ]
26  %v3 = tail call <16 x i32> @llvm.hexagon.V6.valignb(<16 x i32> %v1, <16 x i32> %v2, i32 62)
27  %v4 = tail call <16 x i32> @llvm.hexagon.V6.vaddh(<16 x i32> undef, <16 x i32> undef)
28  %v5 = tail call <16 x i32> @llvm.hexagon.V6.valignb(<16 x i32> %v4, <16 x i32> %v1, i32 2)
29  %v6 = tail call <16 x i32> @llvm.hexagon.V6.vabsdiffh(<16 x i32> %v3, <16 x i32> %v5)
30  store <16 x i32> %v6, <16 x i32>* null, align 64
31  %v7 = add nsw i32 %v0, 1
32  %v8 = icmp slt i32 %v7, undef
33  br i1 %v8, label %b1, label %b2
34
35b2:                                               ; preds = %b1, %b0
36  ret void
37}
38
39; Function Attrs: nounwind readnone
40declare <16 x i32> @llvm.hexagon.V6.vaddh(<16 x i32>, <16 x i32>) #1
41
42; Function Attrs: nounwind readnone
43declare <16 x i32> @llvm.hexagon.V6.valignb(<16 x i32>, <16 x i32>, i32) #1
44
45; Function Attrs: nounwind readnone
46declare <16 x i32> @llvm.hexagon.V6.vabsdiffh(<16 x i32>, <16 x i32>) #1
47
48attributes #0 = { nounwind "target-cpu"="hexagonv60" "target-features"="+hvxv60,+hvx-length64b" }
49attributes #1 = { nounwind readnone }
50