| Commit message (Collapse) | Author | Age | Files | Lines |
|---|
| |
|
|
|
|
|
|
|
|
| |
When IRBuilder builds an empty non-block scope such as a function body,
an if arm, a try block, etc, it needs to produce some expression to
represent the empty contents. Previously it produced a nop, but change
it to produce an empty block instead. The binary writer and printer have
special logic to elide empty blocks, so this produces smaller output.
Update J2CLOpts to recognize functions containing empty blocks as
trivial to avoid regressing one of its tests.
|
| |
|
|
|
| |
A mutable exported global might be shared with another module which
writes to it using the current type, which is unsafe and the type system does
not allow, so do not refine there.
|
| |
|
|
|
|
| |
When we switched to the new type printing machinery, we inserted this
extra space to minimize the diff in the test output compared with the
previous type printer. Improve the quality of the printed output by
removing it.
|
| |
|
|
|
|
|
|
|
|
|
| |
validation (#6603)
GlobalRefining did not traverse module code, so it did not update global.gets
in other globals.
Add missing validation that actually errors on that: We did not check global.get
types.
These could be separate PRs but it would be difficult to test them separately.
|
| |
|
|
|
| |
Replace i31.new with ref.i31 in the printer, tests, and source code. Continue
parsing i31.new for the time being to allow a graceful transition. Also update
the JS API to reflect the new instruction name.
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
When printing Binaryen IR, we previously generated names for unnamed heap types
based on their structure. This was useful for seeing the structure of simple
types at a glance without having to separately go look up their definitions, but
it also had two problems:
1. The same name could be generated for multiple types. The generated names did
not take into account rec group structure or finality, so types that differed
only in these properties would have the same name. Also, generated type names
were limited in length, so very large types that shared only some structure
could also end up with the same names. Using the same name for multiple types
produces incorrect and unparsable output.
2. The generated names were not useful beyond the most trivial examples. Even
with length limits, names for nontrivial types were extremely long and visually
noisy, which made reading disassembled real-world code more challenging.
Fix these problems by emitting simple indexed names for unnamed heap types
instead. This regresses readability for very simple examples, but the trade off
is worth it.
This change also reduces the number of type printing systems we have by one.
Previously we had the system in Print.cpp, but we had another, more general and
extensible system in wasm-type-printing.h and wasm-type.cpp as well. Remove the
old type printing system from Print.cpp and replace it with a much smaller use
of the new system. This requires significant refactoring of Print.cpp so that
PrintExpressionContents object now holds a reference to a parent
PrintSExpression object that holds the type name state.
This diff is very large because almost every test output changed slightly. To
minimize the diff and ease review, change the type printer in wasm-type.cpp to
behave the same as the old type printer in Print.cpp except for the differences
in name generation. These changes will be reverted in much smaller PRs in the
future to generally improve how types are printed.
|
| | |
|
| |
|
|
|
|
| |
Doing so can cause us to switch from a private type to a public type and error.
Also refactor export-utils to make this easy.
|
| |
|
|
|
|
|
|
|
|
|
|
| |
Before we implemented bottom heap types, `ref.null` had to be annotated with
specific types. The `LUBFinder` utility ignored these types so that it could
find the best LUB from all considered non-null expressions, then go back and
update the type annotations on the nulls to match that LUB. Now that we have
bottom types, however, none of that is necessary, and in fact ignoring nulls can
miss possible refinements to bottom types.
Update and simplify `LUBFinder` so that it is a simple wrapper around the
underlying `Type::getLeastUpperBound` utility with no additional logic. Update
tests to account for the more powerful optimizations.
|
| |
|
|
|
|
|
|
|
|
| |
This makes Binaryen's default type system match the WasmGC spec.
Update the way type definitions without supertypes are printed to reduce the
output diff for MVP tests that do not involve WasmGC. Also port some
type-builder.cpp tests from test/example to test/gtest since they needed to be
rewritten to work with isorecursive type anyway.
A follow-on PR will remove equirecursive types completely.
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
These types, `none`, `nofunc`, and `noextern` are uninhabited, so references to
them can only possibly be null. To simplify the IR and increase type precision,
introduce new invariants that all `ref.null` instructions must be typed with one
of these new bottom types and that `Literals` have a bottom type iff they
represent null values. These new invariants requires several additional changes.
First, it is now possible that the `ref` or `target` child of a `StructGet`,
`StructSet`, `ArrayGet`, `ArraySet`, or `CallRef` instruction has a bottom
reference type, so it is not possible to determine what heap type annotation to
emit in the binary or text formats. (The bottom types are not valid type
annotations since they do not have indices in the type section.)
To fix that problem, update the printer and binary emitter to emit unreachables
instead of the instruction with undetermined type annotation. This is a valid
transformation because the only possible value that could flow into those
instructions in that case is null, and all of those instructions trap on nulls.
That fix uncovered a latent bug in the binary parser in which new unreachables
within unreachable code were handled incorrectly. This bug was not previously
found by the fuzzer because we generally stop emitting code once we encounter an
instruction with type `unreachable`. Now, however, it is possible to emit an
`unreachable` for instructions that do not have type `unreachable` (but are
known to trap at runtime), so we will continue emitting code. See the new
test/lit/parse-double-unreachable.wast for details.
Update other miscellaneous code that creates `RefNull` expressions and null
`Literals` to maintain the new invariants as well.
|
| |
|
|
|
| |
Just like `extern` is no longer a subtype of `any` in the new GC type system,
`func` is no longer a subtype of `any`, either. Make that change in our type
system implementation and update tests and fuzzers accordingly.
|
|
|
Fairly simple, this uses the existing infrastructure to find opportunities
to refine the type of a global variable. This a common pattern in j2wasm
for example, where a global begins as a null of $java.lang.Object (the
least specific type) but it is in practice always assigned an object of
some specific type.
|
