| Krzysztof Parzyszek | 046090d | 2018-03-12 14:01:28 +0000 | [diff] [blame] | 1 | ; RUN: llc -march=hexagon -fp-contract=fast -enable-pipeliner < %s |
| 2 | ; REQUIRES: asserts |
| 3 | |
| 4 | ; Pipelining can eliminate the need for a Phi if the loop carried use |
| 5 | ; is scheduled first. We need to rename register uses of the Phi |
| 6 | ; that may occur after the loop. |
| 7 | |
| 8 | define void @f0() #0 { |
| 9 | b0: |
| 10 | br i1 undef, label %b1, label %b12 |
| 11 | |
| 12 | b1: ; preds = %b0 |
| 13 | %v0 = load float, float* undef, align 4 |
| 14 | br i1 undef, label %b2, label %b5 |
| 15 | |
| 16 | b2: ; preds = %b1 |
| 17 | br i1 undef, label %b3, label %b4 |
| 18 | |
| 19 | b3: ; preds = %b3, %b2 |
| 20 | br label %b3 |
| 21 | |
| 22 | b4: ; preds = %b4, %b2 |
| 23 | br i1 undef, label %b5, label %b4 |
| 24 | |
| 25 | b5: ; preds = %b4, %b1 |
| 26 | br i1 undef, label %b6, label %b9 |
| 27 | |
| 28 | b6: ; preds = %b5 |
| 29 | br i1 undef, label %b7, label %b8 |
| 30 | |
| 31 | b7: ; preds = %b7, %b6 |
| 32 | br label %b7 |
| 33 | |
| 34 | b8: ; preds = %b8, %b6 |
| 35 | %v1 = phi i32 [ %v7, %b8 ], [ 2, %b6 ] |
| 36 | %v2 = phi float [ %v6, %b8 ], [ undef, %b6 ] |
| 37 | %v3 = phi float [ %v2, %b8 ], [ undef, %b6 ] |
| 38 | %v4 = fmul float undef, %v2 |
| 39 | %v5 = fsub float %v4, %v3 |
| 40 | %v6 = fadd float %v5, undef |
| 41 | %v7 = add nsw i32 %v1, 1 |
| 42 | %v8 = icmp eq i32 %v7, undef |
| 43 | br i1 %v8, label %b9, label %b8 |
| 44 | |
| 45 | b9: ; preds = %b8, %b5 |
| 46 | %v9 = phi float [ undef, %b5 ], [ %v2, %b8 ] |
| 47 | %v10 = fsub float 0.000000e+00, %v9 |
| 48 | %v11 = fadd float %v10, undef |
| 49 | %v12 = fmul float undef, %v11 |
| 50 | %v13 = fcmp ugt float %v12, 0.000000e+00 |
| 51 | br i1 %v13, label %b10, label %b11 |
| 52 | |
| 53 | b10: ; preds = %b9 |
| 54 | br label %b11 |
| 55 | |
| 56 | b11: ; preds = %b10, %b9 |
| 57 | %v14 = phi float [ undef, %b10 ], [ %v0, %b9 ] |
| 58 | %v15 = fadd float undef, %v14 |
| 59 | br label %b13 |
| 60 | |
| 61 | b12: ; preds = %b0 |
| 62 | ret void |
| 63 | |
| 64 | b13: ; preds = %b13, %b11 |
| 65 | br label %b13 |
| 66 | } |
| 67 | |
| 68 | attributes #0 = { nounwind "target-cpu"="hexagonv55" } |