wasm2js: more js optimization (#2050)

* Emit ints as signed, so -1 isn't a big unsigned number.
* x - -c (where c is a constant) is larger than x + c in js (but not wasm)
* +(+x) => +x
* Avoid unnecessary coercions on calls, return, load, etc. - we just need coercions when entering or exiting "wasm" (not internally), and on actual operations that need them.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/wasm2js/nested-selects.2asm.js b/test/wasm2js/nested-selects.2asm.js
index ac5b7a488..b0fd8fed0 100644
--- a/test/wasm2js/nested-selects.2asm.js
+++ b/test/wasm2js/nested-selects.2asm.js
@@ -24,7 +24,7 @@ function asmFunc(global, env, buffer) {
  function $1($0) {
   $0 = $0 | 0;
   var wasm2js_i32$0 = 0, wasm2js_i32$1 = 0, wasm2js_i32$2 = 0, wasm2js_i32$3 = 0, wasm2js_i32$4 = 0, wasm2js_i32$5 = 0;
-  return (wasm2js_i32$0 = 4294967295, wasm2js_i32$1 = (wasm2js_i32$3 = 1, wasm2js_i32$4 = 0, wasm2js_i32$5 = ($0 | 0) > (0 | 0), wasm2js_i32$5 ? wasm2js_i32$3 : wasm2js_i32$4), wasm2js_i32$2 = ($0 | 0) < (0 | 0), wasm2js_i32$2 ? wasm2js_i32$0 : wasm2js_i32$1) | 0;
+  return (wasm2js_i32$0 = -1, wasm2js_i32$1 = (wasm2js_i32$3 = 1, wasm2js_i32$4 = 0, wasm2js_i32$5 = ($0 | 0) > (0 | 0), wasm2js_i32$5 ? wasm2js_i32$3 : wasm2js_i32$4), wasm2js_i32$2 = ($0 | 0) < (0 | 0), wasm2js_i32$2 ? wasm2js_i32$0 : wasm2js_i32$1) | 0;
  }
  
  var FUNCTION_TABLE = [];