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peepmatic: Apply some review suggestions from @bjorn3

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This commit is contained in:
Nick Fitzgerald
2020-05-08 13:47:14 -07:00
parent a9b280ca3a
commit 22a070ed4f
4 changed files with 181 additions and 219 deletions
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4
cranelift/codegen/src/peepmatic.rs
View File

@@ -196,7 +196,7 @@ fn const_to_value<'a>(builder: impl InstBuilder<'a>, c: Constant, root: Inst) ->
Constant::Int(x, width) => {
let width = bit_width(builder.data_flow_graph(), width, root);
let ty = match width {
1 | 8 => types::I8,
8 => types::I8,
16 => types::I16,
32 => types::I32,
64 => types::I64,
@@ -407,7 +407,7 @@ fn get_argument(dfg: &DataFlowGraph, inst: Inst, i: usize) -> Option<Value> {
fn peepmatic_ty_to_ir_ty(ty: Type, dfg: &DataFlowGraph, root: Inst) -> types::Type {
match (ty.kind, bit_width(dfg, ty.bit_width, root)) {
(Kind::Int, 1) | (Kind::Int, 8) => types::I8,
(Kind::Int, 8) => types::I8,
(Kind::Int, 16) => types::I16,
(Kind::Int, 32) => types::I32,
(Kind::Int, 64) => types::I64,

30
cranelift/peepmatic/crates/runtime/src/linear.rs
View File

@@ -53,6 +53,9 @@ pub fn bool_to_match_result(b: bool) -> MatchResult {
unsafe { Ok(NonZeroU32::new_unchecked(b + 1)) }
}
/// A partial match of an optimization's LHS and partial construction of its
/// RHS.
///
/// An increment is a matching operation, the expected result from that
/// operation to continue to the next increment, and the actions to take to
/// build up the LHS scope and RHS instructions given that we got the expected
@@ -156,17 +159,18 @@ pub struct LhsId(pub u16);
pub struct RhsId(pub u16);
/// An action to perform when transitioning between states in the automata.
///
/// When evaluating actions, the `i^th` action implicitly defines the
/// `RhsId(i)`.
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub enum Action {
/// Implicitly define the n^th built up RHS instruction as something from
/// the left-hand side.
/// Reuse something from the left-hand side.
GetLhs {
/// The path to the instruction or value.
path: PathId,
},
/// Implicitly define the n^th RHS instruction as the result of the
/// compile-time evaluation off this unquote operation.
/// Perform compile-time evaluation.
UnaryUnquote {
/// The unquote operator.
operator: UnquoteOperator,
@@ -174,8 +178,7 @@ pub enum Action {
operand: RhsId,
},
/// Implicitly define the n^th RHS instruction as the result of the
/// compile-time evaluation off this unquote operation.
/// Perform compile-time evaluation.
BinaryUnquote {
/// The unquote operator.
operator: UnquoteOperator,
@@ -183,7 +186,7 @@ pub enum Action {
operands: [RhsId; 2],
},
/// Implicitly define the n^th RHS as an integer constant.
/// Create an integer constant.
MakeIntegerConst {
/// The constant integer value.
value: IntegerId,
@@ -191,7 +194,7 @@ pub enum Action {
bit_width: BitWidth,
},
/// Implicitly define the n^th RHS as a boolean constant.
/// Create a boolean constant.
MakeBooleanConst {
/// The constant boolean value.
value: bool,
@@ -199,14 +202,13 @@ pub enum Action {
bit_width: BitWidth,
},
/// Implicitly defint the n^th RHS as a condition code.
/// Create a condition code.
MakeConditionCode {
/// The condition code.
cc: ConditionCode,
},
/// Implicitly define the n^th RHS instruction by making a unary
/// instruction.
/// Make a unary instruction.
MakeUnaryInst {
/// The operand for this instruction.
operand: RhsId,
@@ -216,8 +218,7 @@ pub enum Action {
operator: Operator,
},
/// Implicitly define the n^th RHS instruction by making a binary
/// instruction.
/// Make a binary instruction.
MakeBinaryInst {
/// The opcode for this instruction.
operator: Operator,
@@ -227,8 +228,7 @@ pub enum Action {
operands: [RhsId; 2],
},
/// Implicitly define the n^th RHS instruction by making a ternary
/// instruction.
/// Make a ternary instruction.
MakeTernaryInst {
/// The opcode for this instruction.
operator: Operator,

14
cranelift/peepmatic/crates/runtime/src/paths.rs
View File

@@ -54,17 +54,17 @@ pub struct PathId(u16);
/// path mapping.
#[derive(Debug, Default)]
pub struct PathInterner {
// A map from a path (whose owned data is inside `arena`) to the canonical
// `PathId` we assigned it when interning it.
/// A map from a path (whose owned data is inside `arena`) to the canonical
/// `PathId` we assigned it when interning it.
map: HashMap<UnsafePath, PathId>,
// A map from a `PathId` index to an unsafe, self-borrowed path pointing
// into `arena`. It is safe to given these out as safe `Path`s, as long as
// the lifetime is not longer than this `PathInterner`'s lifetime.
/// A map from a `PathId` index to an unsafe, self-borrowed path pointing
/// into `arena`. It is safe to given these out as safe `Path`s, as long as
/// the lifetime is not longer than this `PathInterner`'s lifetime.
paths: Vec<UnsafePath>,
// Bump allocation arena for path data. The bump arena ensures that these
// allocations never move, and are therefore safe for self-references.
/// Bump allocation arena for path data. The bump arena ensures that these
/// allocations never move, and are therefore safe for self-references.
arena: bumpalo::Bump,
}

92
cranelift/peepmatic/src/linearize.rs
View File

@@ -599,13 +599,17 @@ mod tests {
let mut i = |i: u64| integers.intern(i);
#[allow(unused_variables)]
let expected = $make_expected(&mut p, &mut i);
let make_expected: fn(
&mut dyn FnMut(&[u8]) -> PathId,
&mut dyn FnMut(u64) -> IntegerId,
) -> Vec<linear::Increment> = $make_expected;
let expected = make_expected(&mut p, &mut i);
dbg!(&expected);
let actual = linearize_optimization(&mut paths, &mut integers, &opts.optimizations[0]);
dbg!(&actual);
dbg!(&actual.increments);
assert_eq!(expected, actual);
assert_eq!(expected, actual.increments);
}
};
}
@@ -617,9 +621,7 @@ mod tests {
(is-power-of-two $C))
(ishl $x $C))
",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![
|p, i| vec![
linear::Increment {
operation: Opcode { path: p(&[0]) },
expected: Ok(NonZeroU32::new(Operator::Imul as _).unwrap()),
@@ -652,78 +654,52 @@ mod tests {
actions: vec![],
},
],
}
},
);
linearizes_to!(
variable_pattern_id_optimization,
"(=> $x $x)",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![linear::Increment {
linearizes_to!(variable_pattern_id_optimization, "(=> $x $x)", |p, i| vec![
linear::Increment {
operation: Nop,
expected: Err(Else),
actions: vec![GetLhs { path: p(&[0]) }],
}],
}
},
);
]);
linearizes_to!(
constant_pattern_id_optimization,
"(=> $C $C)",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![linear::Increment {
linearizes_to!(constant_pattern_id_optimization, "(=> $C $C)", |p, i| vec![
linear::Increment {
operation: IsConst { path: p(&[0]) },
expected: bool_to_match_result(true),
actions: vec![GetLhs { path: p(&[0]) }],
}],
}
},
);
]);
linearizes_to!(
boolean_literal_id_optimization,
"(=> true true)",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![linear::Increment {
|p, i| vec![linear::Increment {
operation: BooleanValue { path: p(&[0]) },
expected: bool_to_match_result(true),
actions: vec![MakeBooleanConst {
value: true,
bit_width: BitWidth::Polymorphic,
}],
}],
}
},
}]
);
linearizes_to!(
number_literal_id_optimization,
"(=> 5 5)",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![linear::Increment {
linearizes_to!(number_literal_id_optimization, "(=> 5 5)", |p, i| vec![
linear::Increment {
operation: IntegerValue { path: p(&[0]) },
expected: Ok(i(5).into()),
actions: vec![MakeIntegerConst {
value: i(5),
bit_width: BitWidth::Polymorphic,
}],
}],
}
},
);
]);
linearizes_to!(
operation_id_optimization,
"(=> (iconst $C) (iconst $C))",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![
|p, i| vec![
linear::Increment {
operation: Opcode { path: p(&[0]) },
expected: Ok(NonZeroU32::new(Operator::Iconst as _).unwrap()),
@@ -744,17 +720,13 @@ mod tests {
expected: bool_to_match_result(true),
actions: vec![],
},
],
}
},
]
);
linearizes_to!(
redundant_bor,
"(=> (bor $x (bor $x $y)) (bor $x $y))",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![
|p, i| vec![
linear::Increment {
operation: Opcode { path: p(&[0]) },
expected: Ok(NonZeroU32::new(Operator::Bor as _).unwrap()),
@@ -796,35 +768,27 @@ mod tests {
expected: Err(Else),
actions: vec![],
},
],
}
},
]
);
linearizes_to!(
large_integers,
// u64::MAX
"(=> 18446744073709551615 0)",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![linear::Increment {
|p, i| vec![linear::Increment {
operation: IntegerValue { path: p(&[0]) },
expected: Ok(i(std::u64::MAX).into()),
actions: vec![MakeIntegerConst {
value: i(0),
bit_width: BitWidth::Polymorphic,
}],
}],
}
}
}]
);
linearizes_to!(
ireduce_with_type_ascription,
"(=> (ireduce{i32} $x) 0)",
|p: &mut dyn FnMut(&[u8]) -> PathId, i: &mut dyn FnMut(u64) -> IntegerId| {
linear::Optimization {
increments: vec![
|p, i| vec![
linear::Increment {
operation: Opcode { path: p(&[0]) },
expected: Ok(NonZeroU32::new(Operator::Ireduce as _).unwrap()),
@@ -843,8 +807,6 @@ mod tests {
expected: Err(Else),
actions: vec![],
},
],
}
}
]
);
}