46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
Rust
//! Test command for testing the DCE pass.
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//!
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//! The `dce` test command runs each function through the DCE pass 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 crate::subtest::{run_filecheck, Context, SubTest};
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use cranelift_codegen;
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use cranelift_codegen::ir::Function;
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use cranelift_reader::TestCommand;
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use std::borrow::Cow;
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struct TestDCE;
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pub fn subtest(parsed: &TestCommand) -> anyhow::Result<Box<dyn SubTest>> {
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assert_eq!(parsed.command, "dce");
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if !parsed.options.is_empty() {
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anyhow::bail!("No options allowed on {}", parsed);
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}
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Ok(Box::new(TestDCE))
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}
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impl SubTest for TestDCE {
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fn name(&self) -> &'static str {
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"dce"
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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 run(&self, func: Cow<Function>, context: &Context) -> anyhow::Result<()> {
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let mut comp_ctx = cranelift_codegen::Context::for_function(func.into_owned());
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comp_ctx.flowgraph();
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comp_ctx.compute_loop_analysis();
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comp_ctx
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.dce(context.flags_or_isa())
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.map_err(|e| crate::pretty_anyhow_error(&comp_ctx.func, context.isa, Into::into(e)))?;
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let text = comp_ctx.func.display(context.isa).to_string();
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run_filecheck(&text, context)
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}
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}
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