vyre-foundation 0.4.1

Foundation layer: IR, type system, memory model, wire format. Zero application semantics. Part of the vyre GPU compiler.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186

use super::*;
use crate::ir::{BufferDecl, DataType, Expr, Node, Program};

#[test]
fn derive_use_counts_simple() {
    let program = Program::wrapped(
        vec![BufferDecl::read_write("out", 0, DataType::U32)],
        [1, 1, 1],
        vec![
            Node::let_bind("x", Expr::u32(1)),
            Node::let_bind("y", Expr::add(Expr::var("x"), Expr::var("x"))),
            Node::store("out", Expr::u32(0), Expr::var("y")),
        ],
    );
    let substrate = FactSubstrate::derive(&program);
    assert_eq!(substrate.use_count_of(&Ident::from("x")), 2);
    assert_eq!(substrate.use_count_of(&Ident::from("y")), 1);
    assert_eq!(substrate.use_count_of(&Ident::from("z")), 0);
}

#[test]
fn derive_use_counts_async_operands() {
    let program = Program::wrapped(
        vec![
            BufferDecl::read("input", 0, DataType::U32).with_count(4),
            BufferDecl::read_write("out", 1, DataType::U32).with_count(4),
        ],
        [1, 1, 1],
        vec![
            Node::let_bind("offset", Expr::u32(1)),
            Node::let_bind("size", Expr::u32(2)),
            Node::async_load_ext(
                Ident::from("input"),
                Ident::from("out"),
                Expr::var("offset"),
                Expr::var("size"),
                Ident::from("copy"),
            ),
        ],
    );
    let substrate = FactSubstrate::derive(&program);
    assert_eq!(substrate.use_count_of(&Ident::from("offset")), 1);
    assert_eq!(substrate.use_count_of(&Ident::from("size")), 1);
}

#[test]
fn derive_use_facts_records_buffer_accesses_and_index_axes() {
    let program = Program::wrapped(
        vec![
            BufferDecl::read("input", 0, DataType::U32).with_count(64),
            BufferDecl::read_write("out", 1, DataType::U32).with_count(64),
        ],
        [8, 8, 1],
        vec![Node::store(
            "out",
            Expr::gid_y(),
            Expr::load("input", Expr::gid_x()),
        )],
    );

    let substrate = FactSubstrate::derive_use_only(&program);
    assert!(substrate.has_fresh_use_facts_for(&program));
    assert!(!substrate.is_fresh_for(&program));
    let facts = substrate.use_facts().unwrap();
    assert_eq!(facts.buffer_reads.get(&Ident::from("input")), Some(&1));
    assert_eq!(facts.buffer_writes.get(&Ident::from("out")), Some(&1));
    assert_eq!(facts.dominant_index_axis(&Ident::from("input")), Some(0));
    assert_eq!(facts.dominant_index_axis(&Ident::from("out")), Some(1));
}

#[test]
fn derive_use_facts_records_scalar_mediated_buffer_dependencies() {
    let program = Program::wrapped(
        vec![
            BufferDecl::read("input", 0, DataType::U32).with_count(1),
            BufferDecl::read_write("scratch", 1, DataType::U32).with_count(1),
            BufferDecl::output("out", 2, DataType::U32).with_count(1),
        ],
        [1, 1, 1],
        vec![
            Node::let_bind("x", Expr::load("input", Expr::u32(0))),
            Node::store("scratch", Expr::u32(0), Expr::var("x")),
            Node::store("out", Expr::u32(0), Expr::load("scratch", Expr::u32(0))),
        ],
    );

    let substrate = FactSubstrate::derive_use_only(&program);
    let facts = substrate.use_facts().unwrap();
    assert!(facts
        .var_buffer_deps
        .get(&Ident::from("x"))
        .is_some_and(|deps| deps.contains(&Ident::from("input"))));
    assert!(facts
        .buffer_write_deps
        .get(&Ident::from("scratch"))
        .is_some_and(|deps| deps.contains(&Ident::from("input"))));
    assert!(facts
        .buffer_write_deps
        .get(&Ident::from("out"))
        .is_some_and(|deps| deps.contains(&Ident::from("scratch"))));
}

#[test]
fn derive_use_facts_records_indirect_dispatch_count_buffers() {
    let program = Program::wrapped(
        vec![BufferDecl::read("counts", 0, DataType::U32).with_count(1)],
        [1, 1, 1],
        vec![Node::indirect_dispatch("counts", 0)],
    );

    let substrate = FactSubstrate::derive_use_only(&program);
    let facts = substrate.use_facts().unwrap();
    assert!(facts
        .indirect_dispatch_buffers
        .contains(&Ident::from("counts")));
    assert_eq!(facts.buffer_reads.get(&Ident::from("counts")), Some(&1));
}

#[test]
fn derive_type_facts_float_propagation() {
    let program = Program::wrapped(
        vec![BufferDecl::read_write("out", 0, DataType::U32)],
        [1, 1, 1],
        vec![
            Node::let_bind("a", Expr::f32(1.0)),
            Node::let_bind("b", Expr::add(Expr::var("a"), Expr::f32(2.0))),
        ],
    );
    let substrate = FactSubstrate::derive(&program);
    let types = substrate.type_map.as_ref().unwrap();
    assert_eq!(types.var_types.get(&Ident::from("a")), Some(&DataType::F32));
    assert_eq!(types.var_types.get(&Ident::from("b")), Some(&DataType::F32));
}

#[test]
fn derive_type_facts_records_loads_and_expression_types() {
    let program = Program::wrapped(
        vec![
            BufferDecl::read("input", 0, DataType::F32).with_count(1),
            BufferDecl::read_write("out", 1, DataType::F32).with_count(1),
        ],
        [1, 1, 1],
        vec![
            Node::let_bind("x", Expr::load("input", Expr::u32(0))),
            Node::store("out", Expr::u32(0), Expr::var("x")),
        ],
    );

    let substrate = FactSubstrate::derive(&program);
    let types = substrate.type_map.as_ref().unwrap();
    assert_eq!(types.var_types.get(&Ident::from("x")), Some(&DataType::F32));
    assert!(
        !types.expr_types.is_empty(),
        "FactSubstrate::TypeFacts promises expression type facts; derive() must populate them"
    );
}

#[test]
fn invalidate_clears_all() {
    let program = Program::wrapped(
        vec![BufferDecl::read_write("out", 0, DataType::U32)],
        [1, 1, 1],
        vec![Node::store("out", Expr::u32(0), Expr::u32(1))],
    );
    let mut substrate = FactSubstrate::derive(&program);
    assert!(substrate.is_fresh_for(&program));
    substrate.invalidate();
    assert!(!substrate.is_fresh_for(&program));
    assert!(substrate.shape.is_none());
}

#[test]
fn derive_use_counts_handles_large_blocks_in_one_pass() {
    let block = Node::block(
        (0..4096)
            .map(|index| Node::let_bind(format!("sink_{index}"), Expr::var("x")))
            .collect(),
    );
    let program = Program::wrapped(
        vec![BufferDecl::read_write("out", 0, DataType::U32)],
        [1, 1, 1],
        vec![Node::let_bind("x", Expr::u32(1)), block],
    );
    let substrate = FactSubstrate::derive(&program);
    assert_eq!(substrate.use_count_of(&Ident::from("x")), 4096);
}