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* [wasm2js] Fix memory.size (#2330)Alon Zakai2019-09-051-0/+4
| | | | | | | We emitted the __wasm_memory_size function only when memory growth was enabled, but it can be used without that too. In theory we could only emit it if either memory growth or memory.size is used, but I think we can expect JS minifiers to do that later. Also fix a test suite bug - the check/auto_update script didn't run all the wasm2js tests when you run it with argument wasm2js (it used that as the list of tests, instead of the list of files, which confused me here for a while...).
* Followup to workaround for minification of wasm2js mem init (#2318)Brion Vibber2019-08-301-3/+3
| | | | | | | | | | | | | Emscripten's minifier mis-minifies a couple bits in the memory init function that's used with wasm2js when not using an external memory init file: https://github.com/emscripten-core/emscripten/issues/8886 Previous fix worked around the bug in one place but failed to account for another. Have now confirmed that it works with this change in place. Updated test cases to match.
* Stop emitting "almost asm" in wasm2js output (#2221)Alon Zakai2019-07-121-1/+0
| | | We don't ever emit "use asm" anymore, so this similar annotation is not really useful, it just increases size.
* Workaround for wasm2js output minification issue with emscripten (#2185)Brion Vibber2019-07-011-2/+3
| | | | | | | | | | | | | | * Workaround for wasm2js output minification issue with emscripten When using emscripten with -O2 and --memory-init-file 0, the JS minification breaks on this function for memory initialization setup, causing an exception to be thrown during module setup. Moving from two 'var' declarations for the same variable to one should avoid hitting this with no change in functionality (the var gets hoisted anyway). https://github.com/emscripten-core/emscripten/issues/8886
* wasm2js: more coercion optimization (#2109)Alon Zakai2019-05-151-0/+42
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* wasm2js: optimize away unneeded load coercions (#2107)Alon Zakai2019-05-151-0/+37
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* wasm2js: Emit table in a way that is friendly to emscripten minification (#2102)Alon Zakai2019-05-131-1/+2
| | | Set it to a local in the asmFunc scope, so that minifiers can easily see it's a simple local value (instead of using it as an upvar from the parameters higher up, which was how the emscripten glue was emitting it).
* wasm2js: precompute bitwise operations (#2101)Alon Zakai2019-05-131-15/+15
| | | This happens on e.g. an i32 load of a constant offset, then we have constant >> 2.
* wasm2js: optimize booleans (#2090)Alon Zakai2019-05-071-0/+8
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* wasm2js: optimize loads (#2085)Alon Zakai2019-05-031-2/+13
| | | | When loading a boolean, prefer the signed heap (which is more commonly used, and may be faster). We never use HEAPU32 (HEAP32 is always enough), just remove it.
* wasm2js: ignore implicit traps (#2079)Alon Zakai2019-05-021-5/+7
| | | | | We don't actually try to emit traps for loads, stores, invalid float to ints, etc., so when optimizing we may as well do so under the assumption those traps do not exist. This lets us emit nice code for a select whose operands are loads, for example - otherwise, the values seem to have side effects.
* wasm2js: run full optimizations during the pipeline (#2071)Alon Zakai2019-04-301-0/+131
We flatten for the i64 lowering etc. passes, and it is worth optimizing afterwards, to clean up stuff they created. That is run if the user ran wasm2js with an optimization level (like wasm2js -O3). Split the test files to check both optimized and unoptimized code.