cranelift_preopt/
lib.rs

1//! Performs early-stage optimizations on Cranelift IR.
2
3#![deny(missing_docs, trivial_numeric_casts, unused_extern_crates)]
4#![warn(unused_import_braces)]
5#![cfg_attr(feature = "std", deny(unstable_features))]
6#![cfg_attr(feature = "clippy", plugin(clippy(conf_file = "../../clippy.toml")))]
7#![cfg_attr(feature = "cargo-clippy", allow(clippy::new_without_default))]
8#![cfg_attr(
9    feature = "cargo-clippy",
10    warn(
11        clippy::float_arithmetic,
12        clippy::mut_mut,
13        clippy::nonminimal_bool,
14        clippy::map_unwrap_or,
15        clippy::clippy::print_stdout,
16        clippy::unicode_not_nfc,
17        clippy::use_self
18    )
19)]
20#![no_std]
21
22mod constant_folding;
23
24use cranelift_codegen::{isa::TargetIsa, settings::FlagsOrIsa, CodegenResult, Context};
25
26/// Optimize the function with available optimizations.
27///
28/// Since this can be resource intensive (and code-size inflating),
29/// it is separated from `Context::compile` to allow DCE to remove it
30/// if it's not used.
31pub fn optimize(ctx: &mut Context, isa: &dyn TargetIsa) -> CodegenResult<()> {
32    ctx.verify_if(isa)?;
33    fold_constants(ctx, isa)?;
34
35    Ok(())
36}
37
38/// Fold constants
39pub fn fold_constants<'a, FOI>(ctx: &mut Context, fisa: FOI) -> CodegenResult<()>
40where
41    FOI: Into<FlagsOrIsa<'a>>,
42{
43    constant_folding::fold_constants(&mut ctx.func);
44    ctx.verify_if(fisa)?;
45    Ok(())
46}