63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
//! Test command for testing the register allocator.
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//!
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//! The `regalloc` test command runs each function through the register allocator after ensuring
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//! that all instructions are legal for the target.
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//!
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//! The resulting function is sent to `filecheck`.
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use cretonne_codegen;
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use cretonne_codegen::ir::Function;
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use cretonne_codegen::print_errors::pretty_error;
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use cretonne_reader::TestCommand;
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use std::borrow::Cow;
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use std::fmt::Write;
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use subtest::{run_filecheck, Context, Result, SubTest};
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struct TestRegalloc;
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pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
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assert_eq!(parsed.command, "regalloc");
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if !parsed.options.is_empty() {
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Err(format!("No options allowed on {}", parsed))
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} else {
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Ok(Box::new(TestRegalloc))
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}
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}
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impl SubTest for TestRegalloc {
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fn name(&self) -> Cow<str> {
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Cow::from("regalloc")
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}
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fn is_mutating(&self) -> bool {
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true
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}
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fn needs_isa(&self) -> bool {
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true
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}
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fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
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let isa = context.isa.expect("register allocator needs an ISA");
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// Create a compilation context, and drop in the function.
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let mut comp_ctx = cretonne_codegen::Context::new();
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comp_ctx.func = func.into_owned();
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comp_ctx.compute_cfg();
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// TODO: Should we have an option to skip legalization?
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comp_ctx.legalize(isa).map_err(|e| {
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pretty_error(&comp_ctx.func, context.isa, e)
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})?;
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comp_ctx.compute_domtree();
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comp_ctx.regalloc(isa).map_err(|e| {
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pretty_error(&comp_ctx.func, context.isa, e)
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})?;
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let mut text = String::new();
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write!(&mut text, "{}", &comp_ctx.func.display(Some(isa)))
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.map_err(|e| e.to_string())?;
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run_filecheck(&text, context)
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}
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}
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