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Don't directly import names from shared.py and support.py, and use
prefixes instead. Also this reorders imports based on PEP
recommendation.
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Another round of trying to push upstream things from my fork.
This PR only adds support for anyref itself as an opaque type. It does NOT implement the full [reference types proposal](https://github.com/WebAssembly/reference-types/blob/master/proposals/reference-types/Overview.md)--so no table.get/set/grow/etc or ref.null, ref.func, etc.
Figured it was easier to review and merge as we go, especially if I did something fundamentally wrong.
***
I did put it under the `--enable-reference-types` flag as I imagine that even though this PR doesn't complete the full feature set, it probably is the right home. Lmk if not.
I'll also be adding a few github comments to places I want to point out/question.
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pep8 specifies 4 space indentation. The use of 2 spaces is, I believe
a historical anomaly where certain large organizations such as google
chose 2 over 4 and have yet to make the switch.
Since there isn't too much code in binaryen today it seems reasonable to
make the switch.
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This adds basic support for exception handling instructions, according
to the spec:
https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md
This PR includes support for:
- Binary reading/writing
- Wast reading/writing
- Stack IR
- Validation
- binaryen.js + C API
- Few IR routines: branch-utils, type-updating, etc
- Few passes: just enough to make `wasm-opt -O` pass
- Tests
This PR does not include support for many optimization passes, fuzzer,
or interpreter. They will be follow-up PRs.
Try-catch construct is modeled in Binaryen IR in a similar manner to
that of if-else: each of try body and catch body will contain a block,
which can be omitted if there is only a single instruction. This block
will not be emitted in wast or binary, as in if-else. As in if-else,
`class Try` contains two expressions each for try body and catch body,
and `catch` is not modeled as an instruction. `exnref` value pushed by
`catch` is get by `pop` instruction.
`br_on_exn` is special: it returns different types of values when taken
and not taken. We make `exnref`, the type `br_on_exn` pushes if not
taken, as `br_on_exn`'s type.
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I fixed flatten.bin.txt which seems to have just had some corrupted data, and I removed some fancy unicode from the spec comments tests, which I'm not sure it's important enough to figure out how to fix.
Fixes #1691
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Adds tail call support to fuzzer and makes small changes to handle return calls in multiple utilities and passes. Makes larger changes to DAE and inlining passes to properly handle tail calls.
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Including parsing, printing, assembling, disassembling.
TODO:
- interpreting
- effects
- finalization and typing
- fuzzing
- JS/C API
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Fix and test mutable globals support, replace string literals with
constants, and add a pass to emit the target features section.
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This only adds the feature and its flag and not the instructions yet.
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In the absence of the target features section or command line flags. When there are command line flags, it is an error if they do not exactly match the target features section, except if --detect-features has been provided.
Also adds a --print-features pass to print the command line flags for all enabled options and uses it to make the feature tests more rigorous.
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* DataCount section
Read the DataCount section and verify that it agrees with the data
section. Also emit the DataCount section when bulk-memory is enabled
and there are a nonzero number of segments. Factor out some shared
unit test code.
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This allows us to emit a (potentially modified) target features
section and conditionally emit other sections such as the DataCount
section based on the presence of features.
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Adds support for the bulk memory proposal's passive segments. Uses a
new (data passive ...) s-expression syntax to mark sections as
passive.
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If the user does not supply features explicitly on the command line,
read and use the features in the target features section for
validation and passes. If the user does supply features explicitly,
error if they are not a superset of the features marked as used in the
target features section and the user does not explicitly handle this.
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Minus multi-memory which we don't support yet.
Improve validator.
Fix some minor validation issues in our tests.
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Moves the feature validation unit test file to a new directory,
'unit', and adds new tests for SIMD and sign-ext. Adds validation for
v128 globals and v128.const.
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