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IRBuilder is a utility for turning arbitrary valid streams of Wasm
instructions into valid Binaryen IR. It is already used in the text
parser, so now use it in the binary parser as well. Since the IRBuilder
API for building each intruction requires only the information that the
binary and text formats include as immediates to that instruction, the
parser is now much simpler than before. In particular, it does not need
to manage a stack of instructions to figure out what the children of
each expression should be; IRBuilder handles this instead.
There are some differences between the IR constructed by IRBuilder and
the IR the binary parser constructed before this change. Most
importantly, IRBuilder generates better multivalue code because it
avoids eagerly breaking up multivalue results into individual components
that might need to be immediately reassembled into a tuple. It also
parses try-delegate more correctly, allowing the delegate to target
arbitrary labels, not just other `try`s. There are also a couple
superficial differences in the generated label and scratch local names.
As part of this change, add support for recording binary source
locations in IRBuilder.
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We previously supported (and primarily used) a non-standard text format for
conditionals in which the condition, if-true expression, and if-false expression
were all simply s-expression children of the `if` expression. The standard text
format, however, requires the use of `then` and `else` forms to introduce the
if-true and if-false arms of the conditional. Update the legacy text parser to
require the standard format and update all tests to match. Update the printer to
print the standard format as well.
The .wast and .wat test inputs were mechanically updated with this script:
https://gist.github.com/tlively/85ae7f01f92f772241ec994c840ccbb1
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Previously the lit test update script interpreted module names as the names of
import items and export names as the names of export items, but it is more
precise to use the actual identifiers of the imported or exported items as the
names instead.
Update update_lit_checks.py to use a more correct regex to match names and to
correctly use the identifiers of import and export items as their names. In some
cases this can improve the readability of test output.
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This ports all tests from `test/` to `test/lit/basic/`. The set of
commands and `CHECK` lines used are the same as the ones in #6159. Now
we use `lit` to test these, this also deletes all `.wast`,
`.wast.from-wast`, `.wast.fromBinary`, and
`.wast.fromBinary.noDebugInfo` files from `test/` and all related test
routines from the python scripts.
All `CHECK` lines are generated by `update_lit_checks.py --all-items`.
This also deletes these three multi-memory tests in `test/lit/`, because
they seem to contain the same code with the ones in `test/`, which have
been ported to `test/lit/basic/` along with other tests.
- `test/lit/multi-memories-atomics64.wast`
- `test/lit/multi-memories-basics.wast`
- `test/lit/multi-memories-simd.wast`
This also adds newlines between `(func`s in case there are none to make
`CHECK` lines easy to view, and removes some extra existing newlines
here and there.
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