43a86f14d5
This also paves the way for unifying TargetIsa and MachBackend, since now they map one to one. In theory the two traits could be merged, which would be nice to limit the number of total concepts. Also they have quite different responsibilities, so it might be fine to keep them separate. Interestingly, this PR started as removing RegInfo from the TargetIsa trait since the adapter returned a dummy value there. From the fallout, noticed that all Display implementations didn't needed an ISA anymore (since these were only used to render ISA specific registers). Also the whole family of RegInfo / ValueLoc / RegUnit was exclusively used for the old backend, and these could be removed. Notably, some IR instructions needed to be removed, because they were using RegUnit too: this was the oddball of regfill / regmove / regspill / copy_special, which were IR instructions inserted by the old regalloc. Fare thee well!
46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
Rust
//! Test command for testing the DCE pass.
|
|
//!
|
|
//! The `dce` test command runs each function through the DCE pass after ensuring
|
|
//! that all instructions are legal for the target.
|
|
//!
|
|
//! The resulting function is sent to `filecheck`.
|
|
|
|
use crate::subtest::{run_filecheck, Context, SubTest};
|
|
use cranelift_codegen;
|
|
use cranelift_codegen::ir::Function;
|
|
use cranelift_reader::TestCommand;
|
|
use std::borrow::Cow;
|
|
|
|
struct TestDCE;
|
|
|
|
pub fn subtest(parsed: &TestCommand) -> anyhow::Result<Box<dyn SubTest>> {
|
|
assert_eq!(parsed.command, "dce");
|
|
if !parsed.options.is_empty() {
|
|
anyhow::bail!("No options allowed on {}", parsed);
|
|
}
|
|
Ok(Box::new(TestDCE))
|
|
}
|
|
|
|
impl SubTest for TestDCE {
|
|
fn name(&self) -> &'static str {
|
|
"dce"
|
|
}
|
|
|
|
fn is_mutating(&self) -> bool {
|
|
true
|
|
}
|
|
|
|
fn run(&self, func: Cow<Function>, context: &Context) -> anyhow::Result<()> {
|
|
let mut comp_ctx = cranelift_codegen::Context::for_function(func.into_owned());
|
|
|
|
comp_ctx.flowgraph();
|
|
comp_ctx.compute_loop_analysis();
|
|
comp_ctx
|
|
.dce(context.flags_or_isa())
|
|
.map_err(|e| crate::pretty_anyhow_error(&comp_ctx.func, Into::into(e)))?;
|
|
|
|
let text = comp_ctx.func.display().to_string();
|
|
run_filecheck(&text, context)
|
|
}
|
|
}
|