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Fuzz fixes
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need the value, as it may do things
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preserve it
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may be unreachable
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to make this practical
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that anyhow, let it do it's thing
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* add docs and error hints when a Call should be a CallImport
* fix binaryen API docs in docs/
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threads proposal (#1082)
Also leave a stub (but valid) visitAtomicRMW in the visitor template so that not all visitors need to implement this function yet.
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Adds a pass that folds code, i.e. merges it when possible. See details in comment in the pass implementation cpp.
This is enabled by default in -Os and -Oz. Seems risky to enable anywhere else, as it does add branches - likely predictable ones so maybe no slowdown, but still some risk.
Code size numbers:
wasm-backend: 196331
+ binaryen -Os (before): 182598
+ binaryen -Os (with folding): 181943
asm2wasm -Os (before): 172463
asm2wasm -Os (with folding): 168774
So this reduces wasm-backend output by an additional 0.5% than it could before. Mainly this is because the wasm backend already has code folding, whereas on asm2wasm output, where we didn't have folding before, this saves over 2%. The 0.5% improvement on the wasm backend's output might be because this can fold more types of code than LLVM can (it can fold nested control flow, in particular).
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Add IR, wast and binary support for atomic loads and stores.
Currently all IR generated by means other than parsing wast and binary files always generates non-atomic accesses, and optimizations have not yet been made aware of atomics, so they are certainly not ready to be used yet.
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* Runtime.stackAlloc should grow down for wasm
* stackAlloc should align properly; update tests
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Begin to implement wasm threading proposal in https://github.com/WebAssembly/threads/blob/master/proposals/threads/Overview.md
This PR just has shared memory attribute with wast and binary support.
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It was using wasm-shell instead of wasm-opt to print. This was
emitting an error and empty output. Also this means that the min.wast
test input didn't get updated along with the spec, so I fixed that as well.
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* consistently handle possible traps in asm.js ffi results
* consistently handle possible traps in i64/float conversions
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(#1063)
This reverts commit 722e6a1893b7d662e536da206835821b2096c0ee.
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The two new failures are calling aboirt(). They date back to before
the LKGR build: https://wasm-stat.us/builders/linux/builds/20068
So its hard to say when they started failing.
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* add C API and binaryen.js support for parsing s-expressions
* update js builds and tests
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* Add SSA pass which ensures a single assign for each local, except for merged locals where we ensure exactly a single assign from one of the paths leading to that use
* Also add InstrumentLocals pass, useful for debugging locals (similar to InstrumentMemory but for locals)
* Fix a PickLoadSigns bug with tees not being ignored, which was not noticed until now because we ran it on flatter output by default, but the ssa pass uncovered the bug
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Support both syntax formats in input since the old spec
tests still need to be parsable.
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* fix mutex usage in C API, and some minor cleanup around it too
* update testcase that was forgotten to be updated before
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This PR adds global variable support (addGlobal, getGlobal, setGlobal), host operations (currentMemory, growMemory), a few utility functions (removeImport, removeExport, getFunctionTypeBySignature with the latter being scheduled for removal once a better alternative is in place) and it introduces an additional argument to specify the result type in BinaryenBlock (effectively breaking the C-API but retaining previous behaviour by introducing the BinaryenUndefined() type for this purpose). Additionally, it enables compilation with exception support in build-js.sh as exceptions are thrown and caught when optimizing endless loops, intentionally resulting in an unreachable opcode. Affected test cases have been updated accordingly.
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* Generate stackSave function in s2wasm
* Generate stackAlloc in s2wasm
* Generate stackRestore in s2wasm
* Update dot_s tests for runtime functions
* Add s2wasm check for exporting runtime functions
* Fix flake8 for s2wasm.py
* Rename wasmBuilder to builder
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should still not have returns with a value, etc. update spec tests to remove some stacky tests that do not fit these new validation rules (#1034)
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(#1017)
* Extends wasm-as, wasm-dis and s2wasm to consume debug locations.
* Exports source map from asm2wasm
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* values cannot flow through an if without an else, they never return a value
* check pass tests in pass-debug mode too
* add missing finalization in binary reading
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* validate that types are properly finalized, when in pass-debug mode (BINARYEN_PASS_DEBUG env var): check after each pass is run that the type of each node is equal to the proper type (when finalizing it, i.e., fully recomputing the type).
* fix many fuzz bugs found by that.
* in particular, fix dce bugs with type changes not being fully updated during code removal. add a new TypeUpdater helper class that lets a pass update types efficiently, by the helper tracking deps between blocks and branches etc., and updating/propagating type changes only as necessary.
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This adds a pass that converts to a CFG, runs the relooper, and re-generates wasm from that. This depends on flatten-control-flow being run before.
The main goal here is to help code generators other than asm2wasm (which already receives relooped code from fastcomp).
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unnecessary complexity in that pass as well
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This pass flattens out control flow in order to achieve 2 properties:
* Control flow structures (block, loop, if) and control flow operations (br, br_if, br_table, return, unreachable) may only be block children, a loop body, or an if-true or if-false. (I.e., they cannot be nested inside an i32.add, a drop, a call, an if-condition, etc.)
* Disallow block, loop, and if return values, i.e., do not use control flow to pass around values.
As a result, expressions cannot contain control flow, and overall control flow is simpler, more structured, and more "flat".
This should make things like re-relooping wasm code much easier, as they can run after the cfg is flattened
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happen, and autoDrop wasn't handling it (#1005)
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* fix type of drop, set_local, set_global, load, etc: when operand is unreachable, so is the node itself
* support binary tests properly in test/passes
* fix unreachable typing of blocks with no name and an unreachable child
* fix continue emitting in asm2wasm
* properly handle emitting of unreachable load
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but does not properly modify the type (#1000)
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