Adds a -working-directory option which can be used to modify how
relative paths are resolved. It affects all other paths used in driver
options (controlled by a new ArgumentIsPath flag on options) as well as
the contents of output file maps and auxilliary file paths generated
implicitly by the compiler itself.
rdar://37713856
This brings the capability from clang to save remarks in an external YAML files.
YAML files can be viewed with tools like the opt-viewer.
Saving the remarks is activated with the new option -save-optimization-record.
Similarly to -emit-tbd, I've only added support for single-compile mode for now.
In this case the default filename is determined by
getOutputFilenameFromPathArgOrAsTopLevel, i.e. unless explicitly specified
with -save-optimization-record-path, the file is placed in the directory of the
main output file as <modulename>.opt.yaml.
Summary:
When the Swift driver executable was first added in
ed2038585f,
the code included a FIXME to support input types, like Clang's
`-x <language>` option. Perhaps as a first step in implementing this
functionality, it also included dead code that manipulated an input type
argument, even though the variable for storing the argument was never
written to.
Remove the unused input type code, and the FIXME. The FIXME is now
tracked with a Swift bug URL, so that a discussion on next steps can be had:
https://bugs.swift.org/browse/SR-6054
Test plan: `utils/build-script --release --test`
A post-commit reviewer on https://github.com/apple/swift/pull/10716
asked that the comments be removed. Remove them, as they're no longer
demarcating code that is internal to Apple.
Previously, Actions were responsible for freeing their inputs...
except for the ones that weren't. Or the ones that were supposed
to, but then they needed to share an input, so they couldn't anymore.
If this sounds ridiculous, you're right; now Actions are just
immediately allocated and owned by the Compilation.
The graph structure of the actions is still useful for some things; in
particular, "top-level" actions get to put their outputs somewhere
permanent rather than TMPDIR. But I expect these things to get cleaned
up in the future too.
