Rename `wasm2asm` to `wasm2js`, emit ESM by default (#1642)

* Rename the `wasm2asm` tool to `wasm2js`

This commit performs a relatively simple rename of the `wasm2asm` tool to
`wasm2js`. The functionality of the tool doesn't change just yet but it's
intended that we'll start generating an ES module instead of just an `asm.js`
function soon.

* wasm2js: Support `*.wasm` input files

Previously `wasm2js` only supported `*.wast` files but to make it a bit easier
to use in tooling pipelines this commit adds support for reading in a `*.wasm`
file directly. Determining which parser to use depends on the input filename,
where the binary parser is used with `*.wasm` files and the wast parser is used
for all other files.

* wasm2js: Emit ESM imports/exports by default

This commit alters the default behavior of `wasm2js` to emit an ESM by default,
either importing items from the environment or exporting. Items like
initialization of memory are also handled here.

1 files changed, 0 insertions, 114 deletions

diff --git a/test/wasm2asm/int_exprs.2asm.js b/test/wasm2asm/int_exprs.2asm.js
deleted file mode 100644
index 661a324f0..000000000
--- a/test/wasm2asm/int_exprs.2asm.js
+++ /dev/null
@@ -1,114 +0,0 @@
-function asmFunc(global, env, buffer) {
- "use asm";
- var HEAP8 = new global.Int8Array(buffer);
- var HEAP16 = new global.Int16Array(buffer);
- var HEAP32 = new global.Int32Array(buffer);
- var HEAPU8 = new global.Uint8Array(buffer);
- var HEAPU16 = new global.Uint16Array(buffer);
- var HEAPU32 = new global.Uint32Array(buffer);
- var HEAPF32 = new global.Float32Array(buffer);
- var HEAPF64 = new global.Float64Array(buffer);
- var Math_imul = global.Math.imul;
- var Math_fround = global.Math.fround;
- var Math_abs = global.Math.abs;
- var Math_clz32 = global.Math.clz32;
- var Math_min = global.Math.min;
- var Math_max = global.Math.max;
- var Math_floor = global.Math.floor;
- var Math_ceil = global.Math.ceil;
- var Math_sqrt = global.Math.sqrt;
- var abort = env.abort;
- var nan = global.NaN;
- var infinity = global.Infinity;
- var i64toi32_i32$HIGH_BITS = 0;
- function $0(x, y) {
-  x = x | 0;
-  y = y | 0;
-  return (x + 1 | 0 | 0) < (y + 1 | 0 | 0) | 0;
- }
- 
- function $1(x, y) {
-  x = x | 0;
-  y = y | 0;
-  return (x + 1 | 0) >>> 0 < (y + 1 | 0) >>> 0 | 0;
- }
- 
- function $2(x, x$hi, y, y$hi) {
-  x = x | 0;
-  x$hi = x$hi | 0;
-  y = y | 0;
-  y$hi = y$hi | 0;
-  var i64toi32_i32$4 = 0, i64toi32_i32$5 = 0, i64toi32_i32$0 = 0, i64toi32_i32$3 = 0, i64toi32_i32$1 = 0, i64toi32_i32$2 = 0, $13 = 0, $14 = 0, $15 = 0, $3_1 = 0, $3$hi = 0, $5$hi = 0;
-  i64toi32_i32$0 = x$hi;
-  i64toi32_i32$0 = i64toi32_i32$0;
-  i64toi32_i32$2 = x;
-  i64toi32_i32$1 = 0;
-  i64toi32_i32$3 = 1;
-  i64toi32_i32$4 = i64toi32_i32$2 + i64toi32_i32$3 | 0;
-  i64toi32_i32$5 = i64toi32_i32$0 + i64toi32_i32$1 | 0;
-  if (i64toi32_i32$4 >>> 0 < i64toi32_i32$3 >>> 0) i64toi32_i32$5 = i64toi32_i32$5 + 1 | 0;
-  $3_1 = i64toi32_i32$4;
-  $3$hi = i64toi32_i32$5;
-  i64toi32_i32$5 = y$hi;
-  i64toi32_i32$5 = i64toi32_i32$5;
-  i64toi32_i32$0 = y;
-  i64toi32_i32$2 = 0;
-  i64toi32_i32$3 = 1;
-  i64toi32_i32$1 = i64toi32_i32$0 + i64toi32_i32$3 | 0;
-  i64toi32_i32$4 = i64toi32_i32$5 + i64toi32_i32$2 | 0;
-  if (i64toi32_i32$1 >>> 0 < i64toi32_i32$3 >>> 0) i64toi32_i32$4 = i64toi32_i32$4 + 1 | 0;
-  $5$hi = i64toi32_i32$4;
-  i64toi32_i32$4 = $3$hi;
-  i64toi32_i32$5 = $3_1;
-  i64toi32_i32$0 = $5$hi;
-  i64toi32_i32$3 = i64toi32_i32$1;
-  if ((i64toi32_i32$4 | 0) < (i64toi32_i32$0 | 0)) $13 = 1; else {
-   if ((i64toi32_i32$4 | 0) <= (i64toi32_i32$0 | 0)) {
-    if (i64toi32_i32$5 >>> 0 >= i64toi32_i32$3 >>> 0) $14 = 0; else $14 = 1;
-    $15 = $14;
-   } else $15 = 0;
-   $13 = $15;
-  }
-  return $13 | 0;
- }
- 
- function $3(x, x$hi, y, y$hi) {
-  x = x | 0;
-  x$hi = x$hi | 0;
-  y = y | 0;
-  y$hi = y$hi | 0;
-  var i64toi32_i32$4 = 0, i64toi32_i32$5 = 0, i64toi32_i32$0 = 0, i64toi32_i32$3 = 0, i64toi32_i32$1 = 0, i64toi32_i32$2 = 0, $3_1 = 0, $3$hi = 0, $5$hi = 0;
-  i64toi32_i32$0 = x$hi;
-  i64toi32_i32$0 = i64toi32_i32$0;
-  i64toi32_i32$2 = x;
-  i64toi32_i32$1 = 0;
-  i64toi32_i32$3 = 1;
-  i64toi32_i32$4 = i64toi32_i32$2 + i64toi32_i32$3 | 0;
-  i64toi32_i32$5 = i64toi32_i32$0 + i64toi32_i32$1 | 0;
-  if (i64toi32_i32$4 >>> 0 < i64toi32_i32$3 >>> 0) i64toi32_i32$5 = i64toi32_i32$5 + 1 | 0;
-  $3_1 = i64toi32_i32$4;
-  $3$hi = i64toi32_i32$5;
-  i64toi32_i32$5 = y$hi;
-  i64toi32_i32$5 = i64toi32_i32$5;
-  i64toi32_i32$0 = y;
-  i64toi32_i32$2 = 0;
-  i64toi32_i32$3 = 1;
-  i64toi32_i32$1 = i64toi32_i32$0 + i64toi32_i32$3 | 0;
-  i64toi32_i32$4 = i64toi32_i32$5 + i64toi32_i32$2 | 0;
-  if (i64toi32_i32$1 >>> 0 < i64toi32_i32$3 >>> 0) i64toi32_i32$4 = i64toi32_i32$4 + 1 | 0;
-  $5$hi = i64toi32_i32$4;
-  i64toi32_i32$4 = $3$hi;
-  i64toi32_i32$5 = $3_1;
-  i64toi32_i32$0 = $5$hi;
-  i64toi32_i32$3 = i64toi32_i32$1;
-  return i64toi32_i32$4 >>> 0 < i64toi32_i32$0 >>> 0 | ((i64toi32_i32$4 | 0) == (i64toi32_i32$0 | 0) & i64toi32_i32$5 >>> 0 < i64toi32_i32$3 >>> 0 | 0) | 0 | 0;
- }
- 
- return {
-  i32_no_fold_cmp_s_offset: $0, 
-  i32_no_fold_cmp_u_offset: $1, 
-  i64_no_fold_cmp_s_offset: $2, 
-  i64_no_fold_cmp_u_offset: $3
- };
-}
-