| 1 | use std::collections::BTreeSet; |
| 2 | use std::path::PathBuf; |
| 3 | |
| 4 | use armfortas::driver::OptLevel; |
| 5 | use armfortas::testing::{capture_from_path, CaptureRequest, CapturedStage, Stage}; |
| 6 | |
| 7 | fn fixture(name: &str) -> PathBuf { |
| 8 | let path = PathBuf::from("test_programs").join(name); |
| 9 | assert!(path.exists(), "missing test fixture {}", path.display()); |
| 10 | path |
| 11 | } |
| 12 | |
| 13 | fn capture_text(request: CaptureRequest, stage: Stage) -> String { |
| 14 | let result = capture_from_path(&request).expect("capture should succeed"); |
| 15 | match result.get(stage) { |
| 16 | Some(CapturedStage::Text(text)) => text.clone(), |
| 17 | Some(CapturedStage::Run(_)) => panic!("expected text stage for {}", stage.as_str()), |
| 18 | None => panic!("missing requested stage {}", stage.as_str()), |
| 19 | } |
| 20 | } |
| 21 | |
| 22 | fn capture_run_stdout(request: CaptureRequest) -> String { |
| 23 | let result = capture_from_path(&request).expect("capture should succeed"); |
| 24 | match result.get(Stage::Run) { |
| 25 | Some(CapturedStage::Run(run)) => run.stdout.clone(), |
| 26 | _ => panic!("missing run stage"), |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | #[test] |
| 31 | fn o3_vectorizes_manual_dot_product_loop() { |
| 32 | let source = fixture("do_loop_vectorize_dot.f90"); |
| 33 | |
| 34 | let o3_ir = capture_text( |
| 35 | CaptureRequest { |
| 36 | input: source.clone(), |
| 37 | requested: BTreeSet::from([Stage::OptIr]), |
| 38 | opt_level: OptLevel::O3, |
| 39 | }, |
| 40 | Stage::OptIr, |
| 41 | ); |
| 42 | // The dot-product path produces two vloads, a vmul, a vadd into |
| 43 | // the vector accumulator, and a final vreduce_sum. |
| 44 | let n_vload = o3_ir.matches("vload").count(); |
| 45 | assert!( |
| 46 | n_vload >= 2, |
| 47 | "dot product needs at least 2 VLoads in the body, got {}:\n{}", |
| 48 | n_vload, |
| 49 | o3_ir |
| 50 | ); |
| 51 | assert!( |
| 52 | o3_ir.contains("vmul") |
| 53 | && o3_ir.contains("vadd") |
| 54 | && o3_ir.contains("vreduce_sum"), |
| 55 | "expected dot-product shape (vmul + vadd + vreduce_sum):\n{}", |
| 56 | o3_ir |
| 57 | ); |
| 58 | |
| 59 | // Runtime: sum(i*i for i = 1..32) = 32*33*65/6 = 11440. |
| 60 | let stdout = capture_run_stdout(CaptureRequest { |
| 61 | input: source, |
| 62 | requested: BTreeSet::from([Stage::Run]), |
| 63 | opt_level: OptLevel::O3, |
| 64 | }); |
| 65 | let trimmed: Vec<&str> = stdout |
| 66 | .lines() |
| 67 | .map(|l| l.trim()) |
| 68 | .filter(|l| !l.is_empty()) |
| 69 | .collect(); |
| 70 | assert_eq!( |
| 71 | trimmed, |
| 72 | vec!["11440"], |
| 73 | "vectorized dot product should produce 11440:\n{}", |
| 74 | stdout |
| 75 | ); |
| 76 | } |
| 77 |