a1b39276e1
The tests for the SIMD floating-point maximum and minimum operations require particular care because the handling of the NaN values is non-deterministic and may vary between platforms. There is no way to match several NaN values in a test, so the solution is to extract the non-deterministic test cases into a separate file that is subsequently replicated for every backend under test, with adjustments made to the expected results. Copyright (c) 2021, Arm Limited.
57 lines
1.7 KiB
Rust
57 lines
1.7 KiB
Rust
//! Test command for testing the preopt pass.
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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 TestSimplePreopt;
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pub fn subtest(parsed: &TestCommand) -> anyhow::Result<Box<dyn SubTest>> {
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assert_eq!(parsed.command, "simple_preopt");
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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(TestSimplePreopt))
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}
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impl SubTest for TestSimplePreopt {
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fn name(&self) -> &'static str {
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"simple_preopt"
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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 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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let isa = context.isa.expect("preopt needs an ISA");
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comp_ctx.compute_cfg();
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comp_ctx
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.preopt(isa)
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.map_err(|e| crate::pretty_anyhow_error(&comp_ctx.func, context.isa, e))?;
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let text = &comp_ctx.func.display(isa).to_string();
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log::debug!("After simple_preopt:\n{}", text);
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// Only actually run the filecheck if peepmatic is *not* enabled,
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// because it can generate slightly different code (alias a result vs
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// replace an instruction) than the non-peepmatic versions of peephole
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// optimizations. Note that the `peepmatic`-based results can be tested
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// with the `test peepmatic` subtest.
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if cfg!(feature = "enable-peepmatic") {
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Ok(())
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} else {
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run_filecheck(&text, context)
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}
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}
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}
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