d4fcd32cdc
* Optimize generated code via the CLI by default This commit updates the behavior of the CLI and adds a new flag. It first enables the `--optimize` flag by default, ensuring that usage of the `wasmtime` CLI will enable cranelift optimizations by default. Next it also adds a `--opt-level` flag which is similar to Rust's `-Copt-level` where it takes a string argument of how to optimize. This is updates to support 0/1/2/s, where 1 is currently the same as 2 but added for consistency with other compilers. The default setting is `--opt-level=2`. When the `-O` flag is not passed the `--opt-level` flag is used, otherwise `-O` takes precedent in the sense that it implies `--opt-level=2` which is the highest optimization level. The thinking is that these flags will in general select the highest optimization level specified as the final optimization level. * Add inline docs * fix a test
35 lines
825 B
Rust
35 lines
825 B
Rust
use anyhow::{Context as _, Result};
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use std::fs::File;
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use std::path::Path;
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use target_lexicon::Triple;
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use wasmtime::Strategy;
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use wasmtime_cli::compile_to_obj;
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use wasmtime_environ::CacheConfig;
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pub fn compile_cranelift(
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wasm: &[u8],
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target: Option<Triple>,
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output: impl AsRef<Path>,
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) -> Result<()> {
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let obj = compile_to_obj(
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wasm,
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target.as_ref(),
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Strategy::Cranelift,
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false,
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wasmtime::OptLevel::None,
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true,
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output
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.as_ref()
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.file_name()
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.unwrap()
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.to_string_lossy()
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.to_string(),
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&CacheConfig::new_cache_disabled(),
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)?;
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let file = File::create(output).context("failed to create object file")?;
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obj.write(file).context("failed to write object file")?;
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Ok(())
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}
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