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Move encoding-related information into an EncInfo struct.

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The tables returned by recipe_names() and recipe_constraints() are now
collected into an EncInfo struct that is available from
TargetIsa::encoding_info(). This is equivalent to the register bank
tables available fro TargetIsa::register_info().

This cleans of the TargetIsa interface and makes it easier to add
encoding-related information.
This commit is contained in:
Jakob Stoklund Olesen
2017-04-05 10:07:19 -07:00
parent 72cb6459a9
commit f47c62ba8c
15 changed files with 88 additions and 83 deletions
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25
lib/cretonne/src/isa/mod.rs
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@@ -40,9 +40,9 @@
//! The configured target ISA trait object is a `Box<TargetIsa>` which can be used for multiple
//! concurrent function compilations.
pub use isa::encoding::Encoding;
pub use isa::registers::{RegInfo, RegUnit, RegClass, RegClassIndex};
pub use isa::constraints::{RecipeConstraints, OperandConstraint, ConstraintKind};
pub use isa::encoding::{Encoding, EncInfo};
pub use isa::registers::{RegInfo, RegUnit, RegClass, RegClassIndex};
use binemit::CodeSink;
use settings;
@@ -143,25 +143,8 @@ pub trait TargetIsa {
/// This is also the main entry point for determining if an instruction is legal.
fn encode(&self, dfg: &DataFlowGraph, inst: &InstructionData) -> Result<Encoding, Legalize>;
/// Get a static array of names associated with encoding recipes in this ISA. Encoding recipes
/// are numbered starting from 0, corresponding to indexes into the name array.
///
/// This is just used for printing and parsing encodings in the textual IL format.
fn recipe_names(&self) -> &'static [&'static str];
/// Get a static array of value operand constraints associated with encoding recipes in this
/// ISA.
///
/// The constraints describe which registers can be used with an encoding recipe.
fn recipe_constraints(&self) -> &'static [RecipeConstraints];
/// Create an object that can display an ISA-dependent encoding properly.
fn display_enc(&self, enc: Encoding) -> encoding::DisplayEncoding {
encoding::DisplayEncoding {
encoding: enc,
recipe_names: self.recipe_names(),
}
}
/// Get a data structure describing the instruction encodings in this ISA.
fn encoding_info(&self) -> EncInfo;
/// Legalize a function signature.
///