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, 154 deletions

diff --git a/test/wasm2asm/int_literals.2asm.js b/test/wasm2asm/int_literals.2asm.js
deleted file mode 100644
index 0a4401348..000000000
--- a/test/wasm2asm/int_literals.2asm.js
+++ /dev/null
@@ -1,154 +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() {
-  return 195940365 | 0;
- }
- 
- function $1() {
-  return 4294967295 | 0;
- }
- 
- function $2() {
-  return 2147483647 | 0;
- }
- 
- function $3() {
-  return 2147483649 | 0;
- }
- 
- function $4() {
-  return 2147483648 | 0;
- }
- 
- function $5() {
-  return 2147483648 | 0;
- }
- 
- function $6() {
-  return 2147483648 + 1 | 0 | 0;
- }
- 
- function $7() {
-  return 0 | 0;
- }
- 
- function $8() {
-  return 10 | 0;
- }
- 
- function $9() {
-  return 4294967295 | 0;
- }
- 
- function $10() {
-  return 42 | 0;
- }
- 
- function $11() {
-  i64toi32_i32$HIGH_BITS = 212580974;
-  return 195455598 | 0;
- }
- 
- function $12() {
-  i64toi32_i32$HIGH_BITS = 4294967295;
-  return 4294967295 | 0;
- }
- 
- function $13() {
-  i64toi32_i32$HIGH_BITS = 2147483647;
-  return 4294967295 | 0;
- }
- 
- function $14() {
-  i64toi32_i32$HIGH_BITS = 2147483648;
-  return 1 | 0;
- }
- 
- function $15() {
-  i64toi32_i32$HIGH_BITS = 2147483648;
-  return 0 | 0;
- }
- 
- function $16() {
-  i64toi32_i32$HIGH_BITS = 2147483648;
-  return 0 | 0;
- }
- 
- function $17() {
-  var i64toi32_i32$5 = 0, i64toi32_i32$4 = 0, i64toi32_i32$3 = 0;
-  i64toi32_i32$3 = 1;
-  i64toi32_i32$4 = 0 + i64toi32_i32$3 | 0;
-  i64toi32_i32$5 = 2147483648 + 0 | 0;
-  if (i64toi32_i32$4 >>> 0 < i64toi32_i32$3 >>> 0) i64toi32_i32$5 = i64toi32_i32$5 + 1 | 0;
-  i64toi32_i32$5 = i64toi32_i32$5;
-  i64toi32_i32$HIGH_BITS = i64toi32_i32$5;
-  return i64toi32_i32$4 | 0;
- }
- 
- function $18() {
-  i64toi32_i32$HIGH_BITS = 0;
-  return 0 | 0;
- }
- 
- function $19() {
-  i64toi32_i32$HIGH_BITS = 0;
-  return 10 | 0;
- }
- 
- function $20() {
-  i64toi32_i32$HIGH_BITS = 4294967295;
-  return 4294967295 | 0;
- }
- 
- function $21() {
-  i64toi32_i32$HIGH_BITS = 0;
-  return 42 | 0;
- }
- 
- return {
-  i32_test: $0, 
-  i32_umax: $1, 
-  i32_smax: $2, 
-  i32_neg_smax: $3, 
-  i32_smin: $4, 
-  i32_alt_smin: $5, 
-  i32_inc_smin: $6, 
-  i32_neg_zero: $7, 
-  i32_not_octal: $8, 
-  i32_unsigned_decimal: $9, 
-  i32_plus_sign: $10, 
-  i64_test: $11, 
-  i64_umax: $12, 
-  i64_smax: $13, 
-  i64_neg_smax: $14, 
-  i64_smin: $15, 
-  i64_alt_smin: $16, 
-  i64_inc_smin: $17, 
-  i64_neg_zero: $18, 
-  i64_not_octal: $19, 
-  i64_unsigned_decimal: $20, 
-  i64_plus_sign: $21
- };
-}
-