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Also fix broken tests surfaced by the new parser.
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Handle a corner case in ReFinalize, which incrementally re-types code after changes. The problem is that if we need to figure out the type of a block, we look to the last element flowing out, or to breaks with values. If there is no such last element, and the breaks are not taken - they have unreachable values - then they don't tell us the block's proper type. We asserted that in such a case the block still had a type, and didn't handle this.
To fix it, we could look on the parent to see what type would fit. However, it seem simpler to just remove untaken breaks/switches as part of ReFinalization - they carry no useful info anyhow. After removing them, if the block has no other signal of a concrete type, it can just be unreachable.
This bug existed for at least 1.5 years - I didn't look back further. I think it was noticed by the fuzzer now due to recent fuzzing improvements and optimizer improvements, as I just saw this bug found a second time.
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This fixes asm2wasm parsing of the max to allow 4GB, and also changes the internal Memory::kMaxValue values to reflect that. We used to use kMaxValue to also represent "no limit", so I split that out into kUnlimitedValue.
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The static std::string base64Encode(std::vector<char> &data) { uses signed char in input data. The ((int)data[0]) converts it the signed int, making '\xFF' char into -1. The patch fixes casting.
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In wasmjs, the nested selects are trying to use the same temporary locals. The patch reserves temporaries "at right time" to avoid overriding the values.
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* Rename the `wasm2asm` tool to `wasm2js`
This commit performs a relatively simple rename of the `wasm2asm` tool to
`wasm2js`. The functionality of the tool doesn't change just yet but it's
intended that we'll start generating an ES module instead of just an `asm.js`
function soon.
* wasm2js: Support `*.wasm` input files
Previously `wasm2js` only supported `*.wast` files but to make it a bit easier
to use in tooling pipelines this commit adds support for reading in a `*.wasm`
file directly. Determining which parser to use depends on the input filename,
where the binary parser is used with `*.wasm` files and the wast parser is used
for all other files.
* wasm2js: Emit ESM imports/exports by default
This commit alters the default behavior of `wasm2js` to emit an ESM by default,
either importing items from the environment or exporting. Items like
initialization of memory are also handled here.
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