1 ; RUN: llc -march=hexagon -hexagon-bit=false < %s
4 ; Fix for an undefined virtual register assert that was caused by an
5 ; incorrect phi generated by the pipeliner. In this case, there is a
6 ; phi that defines a value used by another phi in the next iteration.
7 ; The pipeliner code for generating new phis was assuming that the
8 ; definition is processed before the use, so an incorrect value was
11 ; Function Attrs: nounwind
12 define void @f0() local_unnamed_addr #0 {
16 b1: ; preds = %b1, %b0
17 %v0 = phi i64 [ 0, %b0 ], [ %v5, %b1 ]
18 %v1 = phi i64 [ undef, %b0 ], [ %v9, %b1 ]
19 %v2 = phi i32 [ 0, %b0 ], [ %v10, %b1 ]
20 %v3 = phi i32 [ undef, %b0 ], [ %v4, %b1 ]
21 %v4 = phi i32 [ undef, %b0 ], [ %v8, %b1 ]
22 %v5 = tail call i64 @llvm.hexagon.M2.vdmacs.s0(i64 %v0, i64 %v1, i64 undef)
23 %v6 = tail call i64 @llvm.hexagon.A2.combinew(i32 %v3, i32 %v3)
24 %v7 = tail call i64 @llvm.hexagon.M2.vdmacs.s0(i64 undef, i64 %v6, i64 undef)
25 %v8 = tail call i32 @llvm.hexagon.A2.combine.ll(i32 undef, i32 undef)
26 %v9 = tail call i64 @llvm.hexagon.A2.combinew(i32 %v8, i32 %v4)
27 %v10 = add nuw nsw i32 %v2, 1
28 %v11 = icmp eq i32 %v10, undef
29 br i1 %v11, label %b2, label %b1
32 %v12 = lshr i64 %v7, 32
33 %v13 = trunc i64 %v12 to i32
34 store i32 %v13, i32* undef, align 4
35 %v14 = lshr i64 %v5, 32
39 declare i32 @llvm.hexagon.A2.combine.ll(i32, i32) #1
40 declare i64 @llvm.hexagon.A2.combinew(i32, i32) #1
41 declare i64 @llvm.hexagon.M2.vdmacs.s0(i64, i64, i64) #1
43 attributes #0 = { nounwind "target-cpu"="hexagonv65" }
44 attributes #1 = { nounwind readnone }