Optimize generated code via the CLI by default #973
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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.
fitzgen
approved these changes
Feb 24, 2020
peterhuene
reviewed
Feb 24, 2020
peterhuene
reviewed
Feb 24, 2020
peterhuene
approved these changes
Feb 24, 2020
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Looks like a test needs updating given the new signature for |
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This commit updates the behavior of the CLI and adds a new flag. It
first enables the
--optimizeflag by default, ensuring that usage ofthe
wasmtimeCLI will enable cranelift optimizations by default. Nextit also adds a
--opt-levelflag which is similar to Rust's-Copt-levelwhere it takes a string argument of how to optimize. Thisis 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
-Oflag is not passed the--opt-levelflag is used,otherwise
-Otakes precedent in the sense that it implies--opt-level=2which is the highest optimization level. The thinking isthat these flags will in general select the highest optimization level
specified as the final optimization level.