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* Skeleton of a beginning of o2wasm, WIP and probably not going to be used
* Get building post-cherry-pick
* ast->ir, remove commented out code, include a debug module print because linking
* Read linking section, print emscripten metadata json
* WasmBinaryWriter emits user sections on Module
* Remove debugging prints, everything that isn't needed to build metadata
* Rename o2wasm to lld-metadata
* lld-metadata support for outputting to file
* Use tables index instead of function index for initializer functions
* Add lld-emscripten tool to add emscripten-runtime functions to wasm modules (built with lld)
* Handle EM_ASM in lld-emscripten
* Add a list of functions to forcibly export (for initializer functions)
* Disable incorrect initializer function reading
* Add error printing when parsing .o files in lld-metadata
* Remove ';; METADATA: ' prefix from lld-metadata, output is now standalone json
* Support em_asm consts that aren't at the start of a segment
* Initial test framework for lld-metadata tool
* Add em_asm test
* Add support for WASM_INIT_FUNCS in the linking section
* Remove reloc section parsing because it's unused
* lld-emscripten can read and write text
* Add test harness for lld-emscripten
* Export all functions for now
* Add missing lld test output
* Add support for reading object files differently
Only difference so far is in importing mutable globals being an object
file representation for symbols, but invalid wasm.
* Update help strings
* Update linking tests for stackAlloc fix
* Rename lld-emscripten,lld-metadata to wasm-emscripten-finalize,wasm-link-metadata
* Add help text to header comments
* auto& instead of auto &
* Extract LinkType to abi/wasm-object.h
* Remove special handling for wasm object file reading, allow mutable globals
* Add braces around default switch case
* Fix flake8 errors
* Handle generating dyncall thunks for imports as well
* Use explicit bool for stackPointerGlobal
* Use glob patterns for lld file iteration
* Use __wasm_call_ctors for all initializer functions
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This adds a new tool for better dead code elimination. The problem this helps overcome is when the wasm module is part of something larger, like a wasm+JS combination, and therefore doing DCE in either one is not sufficient as it can't remove a cycle spanning the wasm and JS worlds. Concretely, when binaryen performs DCE by itself, it can never remove an export, because it considers those roots - but in the larger ("meta") space outside, they may actually be removable.
To solve that, this tool receives a description of the outside graph (in very abstract form), including which nodes are roots. It then adds to that graph nodes from the wasm, so that we have a single graph representing the entire space (the outside + wasm + connections between them). It then performs DCE, finding what is not reachable from the roots, and cleaning it up from the wasm. It of course can't clean up things from the outside, since all it has is the abstract representation of those things in the graph, but it prints out the ids of the removable nodes, which an outside tool can use.
This tool is written in as general a way as possible, hopefully it can have multiple uses. The use I have in mind is to write something in emscripten that uses this to DCE the JS+wasm combination that we emit.
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* fix wasm-reduce when out-of-tree: do not use a hardcoded bin/wasm-opt, instead add a Path namespace with utilities to get the proper path, and use BINARYEN_ROOT which our test setup code ensures
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flake8 starts warning on bare "except:" in python scripts, and all CI job is failing for that.
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Reduce an interesting wasm to a smaller still interesting wasm. This takes an arbitrary command to run, and reduces the wasm as much as it can while keeping the behavior of that command fixed. This can be used to reduce compiler bugs in an arbitrary VM, etc.
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This means you can do `rm -rf test/wasm-install` and have
it get redownloaded.
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Also, fix -l and -rpath lib directories so that it can be
run out-of-tree
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* Get wasm2asm building again
Updates CMakeLists.txt to have wasm2asm built by default, updates
wasm2asm.h to account for recent interface changes, and restores
JSPrinter functionality.
* Implement splice for array values
* Clean up wasm2asm testing
* Print semicolons after statements in blocks
* Cleanups and semicolons for condition arms
* Prettify semicolon emission
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* Always use scripts.test.shared for bin paths.
Update scripts/test/shared.py to add WASM_MERGE relative to build
directory. Update auto_update_tests.py to use scripts.test.shared
variables for all bin paths. Update check.py to use
scripts.test.shared for wasm-merge path (this was missing).
This allows check.py and auto_update_tests.py to be run from the
source directory using built binaries in a different location.
* --no-legalize-javascript-ffi disables JS FFI mangling.
For JS/Web platform, calls to JS imports are wrapped to convert i64 to
i32 and f32 to f64. Likewise calls from JS into exports do the inverse
wrapping. This change provides an option to disable that wrapping and
use the original types for the call.
Includes tests test/noffi_f32.asm.js and test/noffi_i64.asm.js to make
sure neither f32->f64 nor i64->i32 type mangling is happening when
--no-legalize-javascript-ffi is specified.
To fully disable JS FFI mangling when using emscripten, the fastcomp
FFI mangling must also be disabled using the
-emscripten-legalize-javascript-ffi=0 flag.
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* Added ModuleReader/Writer classes that support text and binary I/O
* Use them in wasm-opt and asm2wasm
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* Refactor check.py so that groups of tests can be split into separate files
- Move helper util functions into test/shared.py
- Move scripts/support.py to test/support.py
- Split s2wasm tests into its own file
* Fix flake8 warnings for shared.py and s2wasm.py
* Move test scripts from test/ to scripts/test/
* Replace 'from shared import *' with explicit imports
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