b22a714840
The JIT that runs makepad apps from source: lexer, front end, type checker, lazy borrow checker (Gandalf; `--check-first` opts in), codegen, session and warm/cold caches keyed by compiler stamp, provided crates bound late, startup images, live patching. User-facing name is `makepad run` (binary `makepad`, MAKEPAD_RUN_* env, ~/.makepad-run); libs/relax stays the internal library name. `makepad check` reports rustc-style diagnostics with rustc error codes and checks a whole workspace (`--workspace`). Runs on macOS, Linux, Windows and Android. makepad-remote: one tool schema for apps and the WM (app/1): grabs, captures, traces, frame profiles and tweaks. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
94 lines
2.3 KiB
Rust
94 lines
2.3 KiB
Rust
// Integer matches the backend turns into jump tables (a chain of `x == k` tests with >= 6 cases
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// over a dense range): dense and gapped ranges, negative and large keys, values below, inside and
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// above the range, u8 / i32 / i64 scrutinees, arms sharing a body, called often enough for O3
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// (= rustc --test).
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#[inline(never)]
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fn dense(x: u32) -> u32 {
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match x {
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0 => 11,
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1 => 22,
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2 => 33,
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3 => 44,
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4 => 55,
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5 => 66,
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6 => 77,
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7 => 88,
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8 | 9 => 99,
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_ => 1,
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}
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}
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#[inline(never)]
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fn gapped(x: i64) -> i64 {
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match x {
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-40 => 1,
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-37 => 2,
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-30 => 3,
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-21 => 4,
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-20 => 5,
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-3 => 6,
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0 => 7,
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5 => 8,
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_ => x * 2,
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}
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}
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#[inline(never)]
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fn bytes(b: u8) -> u64 {
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match b {
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b'a' => 1,
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b'b' => 2,
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b'c' => 3,
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b'd' => 4,
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b'e' => 5,
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b'f' => 6,
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b'g' => 7,
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b'z' => 26,
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_ => 0,
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}
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}
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#[derive(Clone, Copy)]
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enum Op { A, B, C, D, E, F, G, H, I }
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#[inline(never)]
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fn ops(o: Op, v: i32) -> i32 {
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match o {
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Op::A => v + 1,
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Op::B => v - 1,
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Op::C => v * 3,
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Op::D => v / 2,
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Op::E => v ^ 5,
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Op::F => -v,
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Op::G => v << 2,
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Op::H => v & 7,
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Op::I => 0,
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}
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}
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#[inline(never)]
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fn far(x: i64) -> i64 {
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match x {
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1_000_000_000_000 => 1,
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1_000_000_000_001 => 2,
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1_000_000_000_002 => 3,
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1_000_000_000_003 => 4,
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1_000_000_000_004 => 5,
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1_000_000_000_005 => 6,
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1_000_000_000_007 => 7,
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_ => 9,
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}
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}
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#[test]
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fn jump_tables() {
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let all = [Op::A, Op::B, Op::C, Op::D, Op::E, Op::F, Op::G, Op::H, Op::I];
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let mut h = 0u64;
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for rep in 0..3000u64 {
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for x in 0..80u32 {
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let s = x as i64 - 45;
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h = h.rotate_left(3) ^ dense(x.wrapping_sub(5)) as u64;
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h = h.rotate_left(3) ^ gapped(s) as u64;
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h = h.rotate_left(3) ^ bytes((x + 60) as u8) ^ bytes(x as u8);
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h = h.rotate_left(3) ^ ops(all[(x as usize + rep as usize) % 9], x as i32 - 9) as u64;
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h = h.rotate_left(3) ^ far(1_000_000_000_000 + s / 4) as u64;
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h = h.rotate_left(3) ^ dense(u32::MAX - x) as u64 ^ gapped(i64::MIN + s) as u64;
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}
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}
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println!("| {:016x}", h);
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}
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