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, 195 deletions

diff --git a/test/wasm2asm/switch.2asm.js b/test/wasm2asm/switch.2asm.js
deleted file mode 100644
index f31a940c1..000000000
--- a/test/wasm2asm/switch.2asm.js
+++ /dev/null
@@ -1,195 +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(i) {
-  i = i | 0;
-  var j = 0;
-  j = 100;
-  switch_ : {
-   $7 : {
-    default_ : {
-     $6 : {
-      $5 : {
-       $4 : {
-        $3_1 : {
-         $2_1 : {
-          $1_1 : {
-           $0_1 : {
-            switch (i | 0) {
-            case 0:
-             break $0_1;
-            case 1:
-             break $1_1;
-            case 2:
-             break $2_1;
-            case 3:
-             break $3_1;
-            case 4:
-             break $4;
-            case 5:
-             break $5;
-            case 6:
-             break $6;
-            case 7:
-             break $7;
-            default:
-             break default_;
-            };
-           };
-           return i | 0;
-          };
-         };
-        };
-        j = 0 - i | 0;
-        break switch_;
-       };
-       break switch_;
-      };
-      j = 101;
-      break switch_;
-     };
-     j = 101;
-    };
-    j = 102;
-   };
-  };
-  return j | 0;
- }
- 
- function $1(i, i$hi) {
-  i = i | 0;
-  i$hi = i$hi | 0;
-  var i64toi32_i32$5 = 0, i64toi32_i32$2 = 0, $7_1 = 0, $7$hi = 0, j = 0, j$hi = 0;
-  j = 100;
-  j$hi = 0;
-  switch_ : {
-   $7 : {
-    default_ : {
-     $4 : {
-      $5 : {
-       $6 : {
-        $3_1 : {
-         $2_1 : {
-          $1_1 : {
-           $0_1 : {
-            switch (i | 0) {
-            case 0:
-             break $0_1;
-            case 1:
-             break $1_1;
-            case 2:
-             break $2_1;
-            case 3:
-             break $3_1;
-            case 4:
-             break $4;
-            case 5:
-             break $5;
-            case 6:
-             break $6;
-            case 7:
-             break $7;
-            default:
-             break default_;
-            };
-           };
-           i64toi32_i32$HIGH_BITS = i$hi;
-           return i | 0;
-          };
-         };
-        };
-        i64toi32_i32$2 = 0;
-        i64toi32_i32$5 = (i64toi32_i32$2 >>> 0 < i >>> 0) + i$hi | 0;
-        i64toi32_i32$5 = 0 - i64toi32_i32$5 | 0;
-        i64toi32_i32$5 = i64toi32_i32$5;
-        $7_1 = i64toi32_i32$2 - i | 0;
-        $7$hi = i64toi32_i32$5;
-        break switch_;
-       };
-       i64toi32_i32$5 = 0;
-       j = 101;
-       j$hi = i64toi32_i32$5;
-      };
-     };
-    };
-    i64toi32_i32$5 = j$hi;
-    i64toi32_i32$5 = i64toi32_i32$5;
-    $7_1 = j;
-    $7$hi = i64toi32_i32$5;
-    break switch_;
-   };
-   i64toi32_i32$5 = 4294967295;
-   $7_1 = 4294967291;
-   $7$hi = i64toi32_i32$5;
-  };
-  i64toi32_i32$5 = $7$hi;
-  i64toi32_i32$5 = i64toi32_i32$5;
-  i64toi32_i32$2 = $7_1;
-  i64toi32_i32$HIGH_BITS = i64toi32_i32$5;
-  return i64toi32_i32$2 | 0;
- }
- 
- function $2(i) {
-  i = i | 0;
-  var $5_1 = 0, $6_1 = 0, $7_1 = 0, $8 = 0, $9 = 0;
-  $2_1 : {
-   $1_1 : {
-    $0_1 : {
-     default_ : {
-      $5_1 = Math_imul(2, i);
-      $6_1 = $5_1;
-      $7_1 = $5_1;
-      $8 = $5_1;
-      $9 = $5_1;
-      switch (3 & i | 0 | 0) {
-      case 0:
-       break $0_1;
-      case 1:
-       break $1_1;
-      case 2:
-       break $2_1;
-      default:
-       break default_;
-      };
-     };
-     $6_1 = 1e3 + $9 | 0;
-    };
-    $7_1 = 100 + $6_1 | 0;
-   };
-   $8 = 10 + $7_1 | 0;
-  };
-  return $8 | 0;
- }
- 
- function $3() {
-  return 1 | 0;
- }
- 
- return {
-  stmt: $0, 
-  expr: $1, 
-  arg: $2, 
-  corner: $3
- };
-}
-