add reorder-locals

Author: MaxGraey

src/module.ts

@@ -2395,6 +2395,7 @@ export class Module {
           passes.push("vacuum");
 
           passes.push("ssa-nomerge");
+          passes.push("reorder-locals");
           passes.push("coalesce-locals");
         }
         passes.push("remove-unused-brs");

tests/compiler/NonNullable.optimized.wat

@@ -109,14 +109,14 @@
     if
      local.get $2
      i32.load16_u
-     local.tee $4
+     local.tee $3
      local.get $1
      i32.load16_u
-     local.tee $3
+     local.tee $4
      i32.ne
      if
-      local.get $4
       local.get $3
+      local.get $4
       i32.sub
       br $__inlined_func$~lib/util/string/compareImpl
      end

tests/compiler/builtins.optimized.wat

@@ -165,14 +165,14 @@
     if
      local.get $2
      i32.load16_u
-     local.tee $4
+     local.tee $3
      local.get $1
      i32.load16_u
-     local.tee $3
+     local.tee $4
      i32.ne
      if
-      local.get $4
       local.get $3
+      local.get $4
       i32.sub
       br $__inlined_func$~lib/util/string/compareImpl
      end