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Add early-stage optimization crate (#556)

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* Add simple constant folding and folding tests
This commit is contained in:
Lachlan Sneff
2018-11-07 18:59:29 -05:00
committed by Dan Gohman
parent bdcc06eb15
commit 3409af7c07
22 changed files with 745 additions and 21 deletions
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22
lib/filetests/src/test_preopt.rs
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@@ -1,10 +1,14 @@
//! Test command for testing the preopt pass.
//! Test command for testing the constant folding pass.
//!
//! The `dce` test command runs each function through the constant folding pass after ensuring
//! that all instructions are legal for the target.
//!
//! The resulting function is sent to `filecheck`.
use cranelift_codegen;
use cranelift_codegen::ir::Function;
use cranelift_codegen::print_errors::pretty_error;
use cranelift_preopt::optimize;
use cranelift_reader::TestCommand;
use std::borrow::Cow;
use subtest::{run_filecheck, Context, SubTest, SubtestResult};
@@ -29,16 +33,18 @@ impl SubTest for TestPreopt {
true
}
fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
let mut comp_ctx = cranelift_codegen::Context::for_function(func.into_owned());
let isa = context.isa.expect("preopt needs an ISA");
fn needs_isa(&self) -> bool {
true
}
comp_ctx.flowgraph();
comp_ctx
.preopt(isa)
fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
let isa = context.isa.expect("compile needs an ISA");
let mut comp_ctx = cranelift_codegen::Context::for_function(func.into_owned());
optimize(&mut comp_ctx, isa)
.map_err(|e| pretty_error(&comp_ctx.func, context.isa, Into::into(e)))?;
let text = &comp_ctx.func.display(isa).to_string();
let text = comp_ctx.func.display(context.isa).to_string();
run_filecheck(&text, context)
}
}