diff --git a/src/builtins.ts b/src/builtins.ts
index a824506d..86d7528b 100644
--- a/src/builtins.ts
+++ b/src/builtins.ts
@@ -640,55 +640,80 @@ export function compileCall(
         case TypeKind.I8:
         case TypeKind.I16:
         case TypeKind.I32: {
+          let currentFunction = compiler.currentFunction;
+
           // possibly overflows, e.g. abs<i8>(-128) == 128
-          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i32, false);
-          ret = module.createSelect( // x > 0 ? x : 0-x
-            module.createTeeLocal(tempLocal.index, arg0),
-            module.createBinary(BinaryOp.SubI32, // ifFalse
-              module.createI32(0),
-              module.createGetLocal(tempLocal.index, NativeType.I32)
+          let tempLocal1 = currentFunction.getTempLocal(Type.i32, false);
+          let tempLocalIndex2 = currentFunction.getAndFreeTempLocal(Type.i32, false).index;
+          let tempLocalIndex1 = tempLocal1.index;
+
+          // (x + (x >> 31)) ^ (x >> 31)
+          ret = module.createBinary(BinaryOp.XorI32,
+            module.createBinary(BinaryOp.AddI32,
+              module.createTeeLocal(
+                tempLocalIndex2,
+                module.createBinary(BinaryOp.ShrI32,
+                  module.createTeeLocal(tempLocalIndex1, arg0),
+                  module.createI32(31)
+                )
+              ),
+              module.createGetLocal(tempLocalIndex1, NativeType.I32)
             ),
-            module.createBinary(BinaryOp.GtI32,
-              module.createGetLocal(tempLocal.index, NativeType.I32),
-              module.createI32(0)
-            )
+            module.createGetLocal(tempLocalIndex2, NativeType.I32)
           );
+
+          currentFunction.freeTempLocal(tempLocal1);
           break;
         }
         case TypeKind.ISIZE: {
-          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);
-          ret = module.createSelect(
-            module.createTeeLocal(tempLocal.index, arg0),
-            module.createBinary(
-              compiler.options.isWasm64
-                ? BinaryOp.SubI64
-                : BinaryOp.SubI32,
-              compiler.options.usizeType.toNativeZero(module),
-              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType)
+          let options = compiler.options;
+          let currentFunction = compiler.currentFunction;
+          let wasm64 = options.isWasm64;
+
+          let tempLocal1 = currentFunction.getTempLocal(options.usizeType, false);
+          let tempLocalIndex2 = currentFunction.getAndFreeTempLocal(options.usizeType, false).index;
+          let tempLocalIndex1 = tempLocal1.index;
+
+          ret = module.createBinary(wasm64 ? BinaryOp.XorI64 : BinaryOp.XorI32,
+            module.createBinary(wasm64 ? BinaryOp.AddI64 : BinaryOp.AddI32,
+              module.createTeeLocal(
+                tempLocalIndex2,
+                module.createBinary(wasm64 ? BinaryOp.ShrI64 : BinaryOp.ShrI32,
+                  module.createTeeLocal(tempLocalIndex1, arg0),
+                  wasm64 ? module.createI64(63) : module.createI32(31)
+                )
+              ),
+              module.createGetLocal(tempLocalIndex1, options.nativeSizeType)
             ),
-            module.createBinary(
-              compiler.options.isWasm64
-                ? BinaryOp.GtI64
-                : BinaryOp.GtI32,
-              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType),
-              compiler.options.usizeType.toNativeZero(module)
-            )
+            module.createGetLocal(tempLocalIndex2, options.nativeSizeType)
           );
+
+          currentFunction.freeTempLocal(tempLocal1);
           break;
         }
         case TypeKind.I64: {
-          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);
-          ret = module.createSelect(
-            module.createTeeLocal(tempLocal.index, arg0),
-            module.createBinary(BinaryOp.SubI64,
-              module.createI64(0, 0),
-              module.createGetLocal(tempLocal.index, NativeType.I64),
+          let currentFunction = compiler.currentFunction;
+
+          let tempLocal1 = currentFunction.getTempLocal(Type.i64, false);
+          let tempLocalIndex2 = currentFunction.getAndFreeTempLocal(Type.i64, false).index;
+          let tempLocalIndex1 = tempLocal1.index;
+
+          // (x + (x >> 63)) ^ (x >> 63)
+          ret = module.createBinary(BinaryOp.XorI64,
+            module.createBinary(BinaryOp.AddI64,
+              module.createTeeLocal(
+                tempLocalIndex2,
+                module.createBinary(BinaryOp.ShrI64,
+                  module.createTeeLocal(tempLocalIndex1, arg0),
+                  module.createI64(63)
+                )
+              ),
+              module.createGetLocal(tempLocalIndex1, NativeType.I64)
             ),
-            module.createBinary(BinaryOp.GtI64,
-              module.createGetLocal(tempLocal.index, NativeType.I64),
-              module.createI64(0, 0)
-            )
+            module.createGetLocal(tempLocalIndex2, NativeType.I64)
           );
+
+          currentFunction.freeTempLocal(tempLocal1);
           break;
         }
         case TypeKind.USIZE: {
diff --git a/tests/compiler/builtins.untouched.wat b/tests/compiler/builtins.untouched.wat
index 9615986f..b0a1d268 100644
--- a/tests/compiler/builtins.untouched.wat
+++ b/tests/compiler/builtins.untouched.wat
@@ -318,13 +318,13 @@
   drop
   i32.const -42
   tee_local $0
-  i32.const 0
+  i32.const 31
+  i32.shr_s
+  tee_local $1
   get_local $0
-  i32.sub
-  get_local $0
-  i32.const 0
-  i32.gt_s
-  select
+  i32.add
+  get_local $1
+  i32.xor
   drop
   i32.const 1
   tee_local $0
@@ -363,13 +363,13 @@
   set_global $builtins/i
   i32.const -42
   tee_local $0
-  i32.const 0
+  i32.const 31
+  i32.shr_s
+  tee_local $1
   get_local $0
-  i32.sub
-  get_local $0
-  i32.const 0
-  i32.gt_s
-  select
+  i32.add
+  get_local $1
+  i32.xor
   set_global $builtins/i
   get_global $builtins/i
   i32.const 42
@@ -444,13 +444,13 @@
   drop
   i64.const -42
   tee_local $2
-  i64.const 0
+  i64.const 63
+  i64.shr_s
+  tee_local $3
   get_local $2
-  i64.sub
-  get_local $2
-  i64.const 0
-  i64.gt_s
-  select
+  i64.add
+  get_local $3
+  i64.xor
   drop
   i64.const 1
   i64.clz
@@ -471,13 +471,13 @@
   set_global $builtins/I
   i64.const -42
   tee_local $2
-  i64.const 0
+  i64.const 63
+  i64.shr_s
+  tee_local $3
   get_local $2
-  i64.sub
-  get_local $2
-  i64.const 0
-  i64.gt_s
-  select
+  i64.add
+  get_local $3
+  i64.xor
   set_global $builtins/I
   get_global $builtins/I
   i64.const 42
diff --git a/tests/compiler/std/string.optimized.wat b/tests/compiler/std/string.optimized.wat
index 8c6dae3f..1c6be7d3 100644
--- a/tests/compiler/std/string.optimized.wat
+++ b/tests/compiler/std/string.optimized.wat
@@ -349,7 +349,6 @@
    else    
     get_local $3
    end
-   tee_local $0
    if
     get_local $3
     i32.const 1
@@ -563,12 +562,10 @@
    unreachable
   end
   get_local $1
-  i32.eqz
-  if
-   i32.const 200
-   set_local $1
-  end
+  i32.const 200
   get_local $1
+  select
+  tee_local $1
   i32.load
   tee_local $4
   i32.eqz
@@ -632,15 +629,12 @@
   (local $4 i32)
   (local $5 i32)
   loop $continue|0
+   get_local $1
+   i32.const 3
+   i32.and
    get_local $2
-   if (result i32)
-    get_local $1
-    i32.const 3
-    i32.and
-   else    
-    get_local $2
-   end
-   tee_local $3
+   get_local $2
+   select
    if
     get_local $0
     tee_local $4
@@ -732,14 +726,14 @@
     i32.add
     i32.load
     i32.store
-    get_local $0
-    i32.const 8
-    i32.add
-    set_local $0
     get_local $1
     i32.const 8
     i32.add
     set_local $1
+    get_local $0
+    i32.const 8
+    i32.add
+    set_local $0
    end
    get_local $2
    i32.const 4
@@ -749,14 +743,14 @@
     get_local $1
     i32.load
     i32.store
-    get_local $0
-    i32.const 4
-    i32.add
-    set_local $0
     get_local $1
     i32.const 4
     i32.add
     set_local $1
+    get_local $0
+    i32.const 4
+    i32.add
+    set_local $0
    end
    get_local $2
    i32.const 2
@@ -766,21 +760,19 @@
     get_local $1
     i32.load16_u
     i32.store16
-    get_local $0
-    i32.const 2
-    i32.add
-    set_local $0
     get_local $1
     i32.const 2
     i32.add
     set_local $1
+    get_local $0
+    i32.const 2
+    i32.add
+    set_local $0
    end
    get_local $2
    i32.const 1
    i32.and
    if
-    get_local $1
-    set_local $3
     get_local $0
     get_local $1
     i32.load8_u
@@ -1523,8 +1515,6 @@
   i32.const 1
   i32.and
   if
-   get_local $1
-   set_local $3
    get_local $0
    get_local $1
    i32.load8_u
@@ -1591,7 +1581,6 @@
       set_local $2
       get_local $0
       tee_local $4
-      tee_local $3
       i32.const 1
       i32.add
       set_local $0
@@ -1637,7 +1626,6 @@
     if
      get_local $0
      tee_local $4
-     tee_local $3
      i32.const 1
      i32.add
      set_local $0
@@ -2192,16 +2180,14 @@
    call $~lib/env/abort
    unreachable
   end
-  get_local $1
-  i32.eqz
-  if
-   i32.const 200
-   set_local $1
-  end
   get_local $0
   i32.load
   set_local $3
   get_local $1
+  i32.const 200
+  get_local $1
+  select
+  tee_local $1
   i32.load
   tee_local $4
   i32.eqz
@@ -2719,16 +2705,14 @@
    call $~lib/env/abort
    unreachable
   end
-  get_local $1
-  i32.eqz
-  if
-   i32.const 200
-   set_local $1
-  end
   get_local $0
   i32.load
   tee_local $3
   get_local $1
+  i32.const 200
+  get_local $1
+  select
+  tee_local $1
   i32.load
   tee_local $4
   i32.add
@@ -2756,12 +2740,9 @@
  )
  (func $~lib/string/String.__concat (; 26 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   get_local $0
-  i32.eqz
-  if
-   i32.const 200
-   set_local $0
-  end
+  i32.const 200
   get_local $0
+  select
   get_local $1
   call $~lib/string/String#concat
  )
@@ -2948,7 +2929,6 @@
   end
   get_local $0
   i32.eqz
-  tee_local $1
   if
    i32.const 0
    return
@@ -3104,7 +3084,6 @@
    i32.lt_s
    select
   end
-  tee_local $1
   get_local $4
   i32.sub
   tee_local $2
@@ -3596,27 +3575,26 @@
   if
    i32.const 1
    call $~lib/array/Array<String>#constructor
-   tee_local $4
+   tee_local $6
    i32.load
    get_local $0
    i32.store offset=8
-   get_local $4
+   get_local $6
    return
   end
   get_local $0
   i32.load
   set_local $3
-  get_local $1
-  i32.load
-  set_local $8
+  i32.const 2147483647
+  get_local $2
   get_local $2
   i32.const 0
   i32.lt_s
-  if
-   i32.const 2147483647
-   set_local $2
-  end
-  get_local $8
+  select
+  set_local $2
+  get_local $1
+  i32.load
+  tee_local $9
   if
    get_local $3
    i32.eqz
@@ -3633,7 +3611,6 @@
     return
    end
    get_local $3
-   tee_local $4
    get_local $2
    get_local $3
    get_local $2
@@ -3641,7 +3618,7 @@
    select
    tee_local $3
    call $~lib/array/Array<String>#constructor
-   tee_local $4
+   tee_local $6
    i32.load
    set_local $7
    i32.const 0
@@ -3675,23 +3652,23 @@
      br $repeat|0
     end
    end
-   get_local $4
+   get_local $6
    return
   end
   i32.const 0
   call $~lib/array/Array<String>#constructor
-  set_local $5
+  set_local $4
   loop $continue|1
    get_local $0
    get_local $1
-   get_local $6
+   get_local $5
    call $~lib/string/String#indexOf
-   tee_local $9
+   tee_local $8
    i32.const -1
    i32.ne
    if
-    get_local $9
-    get_local $6
+    get_local $8
+    get_local $5
     i32.sub
     tee_local $7
     i32.const 0
@@ -3699,18 +3676,18 @@
     if
      get_local $7
      call $~lib/internal/string/allocateUnsafe
-     tee_local $4
+     tee_local $6
      i32.const 0
      get_local $0
-     get_local $6
+     get_local $5
      get_local $7
      call $~lib/internal/string/copyUnsafe
-     get_local $5
      get_local $4
+     get_local $6
      call $~lib/array/Array<String>#push
      drop
     else     
-     get_local $5
+     get_local $4
      i32.const 256
      call $~lib/array/Array<String>#push
      drop
@@ -3722,17 +3699,17 @@
     get_local $2
     i32.eq
     if
-     get_local $5
+     get_local $4
      return
     end
     get_local $8
     get_local $9
     i32.add
-    set_local $6
+    set_local $5
     br $continue|1
    end
   end
-  get_local $6
+  get_local $5
   i32.eqz
   if
    i32.const 1
@@ -3745,7 +3722,7 @@
    return
   end
   get_local $3
-  get_local $6
+  get_local $5
   i32.sub
   tee_local $1
   i32.const 0
@@ -3756,20 +3733,20 @@
    tee_local $2
    i32.const 0
    get_local $0
-   get_local $6
+   get_local $5
    get_local $1
    call $~lib/internal/string/copyUnsafe
-   get_local $5
+   get_local $4
    get_local $2
    call $~lib/array/Array<String>#push
    drop
   else   
-   get_local $5
+   get_local $4
    i32.const 256
    call $~lib/array/Array<String>#push
    drop
   end
-  get_local $5
+  get_local $4
  )
  (func $~lib/string/String#split|trampoline (; 41 ;) (type $FUNCSIG$iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
@@ -4212,19 +4189,21 @@
    i32.const 480
    return
   end
-  get_local $0
-  i64.const 0
-  i64.lt_s
-  tee_local $1
-  if
-   i64.const 0
+  block (result i32)
    get_local $0
-   i64.sub
-   set_local $0
+   i64.const 0
+   i64.lt_s
+   tee_local $1
+   if
+    i64.const 0
+    get_local $0
+    i64.sub
+    set_local $0
+   end
+   get_local $0
+   i64.const 4294967295
+   i64.le_u
   end
-  get_local $0
-  i64.const 4294967295
-  i64.le_u
   if
    get_local $0
    i32.wrap/i64
@@ -4584,93 +4563,91 @@
    i64.and
    tee_local $1
    get_local $5
-   i64.lt_u
-   if (result i32)
-    get_global $~lib/internal/number/_K
-    get_local $9
-    i32.add
-    set_global $~lib/internal/number/_K
-    get_local $12
-    i32.const 0
-    get_local $9
-    i32.sub
-    i32.const 2
-    i32.shl
-    i32.add
-    i64.load32_u offset=8
+   i64.ge_u
+   br_if $continue|3
+   get_global $~lib/internal/number/_K
+   get_local $9
+   i32.add
+   set_global $~lib/internal/number/_K
+   get_local $12
+   i32.const 0
+   get_local $9
+   i32.sub
+   i32.const 2
+   i32.shl
+   i32.add
+   i64.load32_u offset=8
+   get_local $8
+   i64.mul
+   set_local $8
+   get_local $6
+   i32.const 1
+   i32.sub
+   i32.const 1
+   i32.shl
+   get_local $0
+   i32.add
+   tee_local $7
+   i32.load16_u offset=4
+   set_local $4
+   loop $continue|4
+    get_local $1
     get_local $8
-    i64.mul
-    set_local $8
-    get_local $6
-    i32.const 1
-    i32.sub
-    i32.const 1
-    i32.shl
-    get_local $0
-    i32.add
-    tee_local $7
-    i32.load16_u offset=4
-    set_local $4
-    loop $continue|4
+    i64.lt_u
+    tee_local $2
+    if
+     get_local $5
      get_local $1
+     i64.sub
+     get_local $10
+     i64.ge_u
+     set_local $2
+    end
+    get_local $2
+    if
+     get_local $1
+     get_local $10
+     i64.add
      get_local $8
      i64.lt_u
      tee_local $2
+     i32.eqz
      if
-      get_local $5
+      get_local $8
       get_local $1
       i64.sub
-      get_local $10
-      i64.ge_u
-      set_local $2
-     end
-     get_local $2
-     if
       get_local $1
       get_local $10
       i64.add
       get_local $8
-      i64.lt_u
-      tee_local $2
-      i32.eqz
-      if
-       get_local $8
-       get_local $1
-       i64.sub
-       get_local $1
-       get_local $10
-       i64.add
-       get_local $8
-       i64.sub
-       i64.gt_u
-       set_local $2
-      end
-     end
-     get_local $2
-     if
-      get_local $4
-      i32.const 1
-      i32.sub
-      set_local $4
-      get_local $1
-      get_local $10
-      i64.add
-      set_local $1
-      br $continue|4
+      i64.sub
+      i64.gt_u
+      set_local $2
      end
     end
-    get_local $7
-    get_local $4
-    i32.store16 offset=4
-    get_local $6
-   else    
-    br $continue|3
+    get_local $2
+    if
+     get_local $4
+     i32.const 1
+     i32.sub
+     set_local $4
+     get_local $1
+     get_local $10
+     i64.add
+     set_local $1
+     br $continue|4
+    end
    end
+   get_local $7
+   get_local $4
+   i32.store16 offset=4
+   get_local $6
   end
  )
  (func $~lib/internal/number/prettify (; 51 ;) (type $iiii) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
   (local $3 i32)
   (local $4 i32)
+  (local $5 i32)
   get_local $2
   i32.eqz
   if
@@ -4690,11 +4667,11 @@
   get_local $1
   get_local $2
   i32.add
-  tee_local $4
+  tee_local $5
   i32.le_s
   tee_local $3
   if
-   get_local $4
+   get_local $5
    i32.const 21
    i32.le_s
    set_local $3
@@ -4706,7 +4683,7 @@
    loop $repeat|0
     block $break|0
      get_local $3
-     get_local $4
+     get_local $5
      i32.ge_s
      br_if $break|0
      get_local $3
@@ -4723,40 +4700,41 @@
      br $repeat|0
     end
    end
-   get_local $4
+   get_local $5
    i32.const 1
    i32.shl
    get_local $0
    i32.add
    i32.const 3145774
    i32.store offset=4
-   get_local $4
+   get_local $5
    i32.const 2
    i32.add
   else   
-   get_local $4
+   get_local $5
    i32.const 0
    i32.gt_s
    tee_local $3
    if
-    get_local $4
+    get_local $5
     i32.const 21
     i32.le_s
     set_local $3
    end
    get_local $3
    if (result i32)
-    get_local $4
+    get_local $5
     i32.const 1
     i32.shl
     get_local $0
     i32.add
     tee_local $3
-    i32.const 6
-    i32.add
-    get_local $3
     i32.const 4
     i32.add
+    tee_local $0
+    i32.const 2
+    i32.add
+    get_local $0
     i32.const 0
     get_local $2
     i32.sub
@@ -4771,11 +4749,11 @@
     i32.add
    else    
     i32.const -6
-    get_local $4
+    get_local $5
     i32.lt_s
     tee_local $3
     if
-     get_local $4
+     get_local $5
      i32.const 0
      i32.le_s
      set_local $3
@@ -4785,16 +4763,15 @@
      get_local $0
      i32.const 4
      i32.add
+     tee_local $2
      i32.const 2
-     get_local $4
+     get_local $5
      i32.sub
      tee_local $3
      i32.const 1
      i32.shl
      i32.add
-     get_local $0
-     i32.const 4
-     i32.add
+     get_local $2
      get_local $1
      i32.const 1
      i32.shl
@@ -4803,24 +4780,24 @@
      i32.const 3014704
      i32.store offset=4
      i32.const 2
-     set_local $2
+     set_local $4
      loop $repeat|1
       block $break|1
-       get_local $2
+       get_local $4
        get_local $3
        i32.ge_s
        br_if $break|1
-       get_local $2
+       get_local $4
        i32.const 1
        i32.shl
        get_local $0
        i32.add
        i32.const 48
        i32.store16 offset=4
-       get_local $2
+       get_local $4
        i32.const 1
        i32.add
-       set_local $2
+       set_local $4
        br $repeat|1
       end
      end
@@ -4838,48 +4815,52 @@
       get_local $0
       i32.const 4
       i32.add
-      set_local $3
-      get_local $4
-      i32.const 1
-      i32.sub
-      tee_local $2
-      i32.const 0
-      i32.lt_s
-      tee_local $0
-      if
-       i32.const 0
-       get_local $2
+      tee_local $3
+      block (result i32)
+       get_local $5
+       i32.const 1
        i32.sub
-       set_local $2
+       tee_local $4
+       i32.const 0
+       i32.lt_s
+       tee_local $2
+       if
+        i32.const 0
+        get_local $4
+        i32.sub
+        set_local $4
+       end
+       get_local $4
       end
-      get_local $3
-      get_local $2
-      get_local $2
+      get_local $4
       call $~lib/internal/number/decimalCount32
       i32.const 1
       i32.add
-      tee_local $2
+      tee_local $4
       call $~lib/internal/number/utoa32_lut
       get_local $3
       i32.const 45
       i32.const 43
-      get_local $0
+      get_local $2
       select
       i32.store16 offset=4
-      get_local $2
+      get_local $4
       i32.const 2
       i32.add
      else      
       get_local $0
-      i32.const 8
+      i32.const 4
       i32.add
-      get_local $0
-      i32.const 6
+      tee_local $3
+      i32.const 4
+      i32.add
+      get_local $3
+      i32.const 2
       i32.add
       get_local $1
       i32.const 1
       i32.shl
-      tee_local $2
+      tee_local $4
       i32.const 2
       i32.sub
       call $~lib/internal/memory/memmove
@@ -4887,7 +4868,7 @@
       i32.const 46
       i32.store16 offset=6
       get_local $0
-      get_local $2
+      get_local $4
       i32.add
       tee_local $0
       i32.const 101
@@ -4895,36 +4876,37 @@
       get_local $0
       i32.const 4
       i32.add
-      set_local $3
-      get_local $4
-      i32.const 1
-      i32.sub
-      tee_local $2
-      i32.const 0
-      i32.lt_s
-      tee_local $0
-      if
-       i32.const 0
-       get_local $2
+      tee_local $3
+      block (result i32)
+       get_local $5
+       i32.const 1
        i32.sub
-       set_local $2
+       tee_local $4
+       i32.const 0
+       i32.lt_s
+       tee_local $2
+       if
+        i32.const 0
+        get_local $4
+        i32.sub
+        set_local $4
+       end
+       get_local $4
       end
-      get_local $3
-      get_local $2
-      get_local $2
+      get_local $4
       call $~lib/internal/number/decimalCount32
       i32.const 1
       i32.add
-      tee_local $2
+      tee_local $0
       call $~lib/internal/number/utoa32_lut
       get_local $3
       i32.const 45
       i32.const 43
-      get_local $0
+      get_local $2
       select
       i32.store16 offset=4
+      get_local $0
       get_local $1
-      get_local $2
       i32.add
       i32.const 2
       i32.add
@@ -4937,8 +4919,8 @@
   (local $2 i64)
   (local $3 i64)
   (local $4 i32)
-  (local $5 i32)
-  (local $6 i64)
+  (local $5 i64)
+  (local $6 i32)
   (local $7 i64)
   (local $8 i32)
   (local $9 i64)
@@ -4952,15 +4934,15 @@
   f64.const 0
   f64.lt
   tee_local $13
-  if
-   get_local $1
-   f64.neg
-   set_local $1
+  if (result f64)
    get_local $0
    i32.const 45
    i32.store16 offset=4
+   get_local $1
+   f64.neg
+  else   
+   get_local $1
   end
-  get_local $1
   i64.reinterpret/f64
   tee_local $2
   i64.const 9218868437227405312
@@ -4975,7 +4957,7 @@
   get_local $8
   i32.const 0
   i32.ne
-  tee_local $5
+  tee_local $6
   i64.extend_u/i32
   i64.const 52
   i64.shl
@@ -4983,24 +4965,24 @@
   set_local $2
   get_local $8
   i32.const 1
-  get_local $5
+  get_local $6
   select
   i32.const 1075
   i32.sub
   tee_local $8
   i32.const 1
   i32.sub
-  set_local $5
+  set_local $6
   get_local $2
   i64.const 1
   i64.shl
   i64.const 1
   i64.add
-  tee_local $6
+  tee_local $5
   i64.clz
   i32.wrap/i64
   set_local $4
-  get_local $6
+  get_local $5
   get_local $4
   i64.extend_s/i32
   i64.shl
@@ -5019,15 +5001,15 @@
   get_local $8
   get_local $14
   i32.sub
-  get_local $5
+  get_local $6
   get_local $4
   i32.sub
-  tee_local $5
+  tee_local $6
   i32.sub
   i64.extend_s/i32
   i64.shl
   set_global $~lib/internal/number/_frc_minus
-  get_local $5
+  get_local $6
   set_global $~lib/internal/number/_exp
   i32.const 348
   i32.const -61
@@ -5050,7 +5032,7 @@
   i32.shr_s
   i32.const 1
   i32.add
-  tee_local $5
+  tee_local $6
   i32.const 3
   i32.shl
   i32.sub
@@ -5060,14 +5042,14 @@
   set_local $4
   i32.const 4312
   i32.load
-  get_local $5
+  get_local $6
   i32.const 3
   i32.shl
   i32.add
   i64.load offset=8
   set_global $~lib/internal/number/_frc_pow
   get_local $4
-  get_local $5
+  get_local $6
   i32.const 1
   i32.shl
   i32.add
@@ -5085,13 +5067,13 @@
   i64.and
   tee_local $7
   get_global $~lib/internal/number/_frc_pow
-  tee_local $6
+  tee_local $5
   i64.const 4294967295
   i64.and
   tee_local $9
   i64.mul
   set_local $10
-  get_local $6
+  get_local $5
   i64.const 32
   i64.shr_u
   tee_local $11
@@ -5111,7 +5093,6 @@
   i64.const 4294967295
   i64.and
   i64.add
-  tee_local $2
   i64.const 2147483647
   i64.add
   i64.const 32
@@ -5125,7 +5106,7 @@
   i64.add
   i64.add
   set_local $2
-  get_local $6
+  get_local $5
   i64.const 4294967295
   i64.and
   tee_local $11
@@ -5137,7 +5118,7 @@
   i64.mul
   set_local $7
   get_local $10
-  get_local $6
+  get_local $5
   i64.const 32
   i64.shr_u
   tee_local $9
@@ -5156,7 +5137,6 @@
   i64.const 4294967295
   i64.and
   i64.add
-  tee_local $7
   i64.const 2147483647
   i64.add
   i64.const 32
@@ -5175,13 +5155,13 @@
   i64.const 4294967295
   i64.and
   tee_local $7
-  get_local $6
+  get_local $5
   i64.const 4294967295
   i64.and
   tee_local $9
   i64.mul
   set_local $10
-  get_local $6
+  get_local $5
   i64.const 32
   i64.shr_u
   tee_local $11
@@ -5201,7 +5181,7 @@
   i64.const 4294967295
   i64.and
   i64.add
-  set_local $6
+  set_local $5
   get_local $15
   i64.const 1
   i64.sub
@@ -5213,7 +5193,7 @@
   i64.const 32
   i64.shr_u
   i64.add
-  get_local $6
+  get_local $5
   i64.const 2147483647
   i64.add
   i64.const 32
@@ -5238,7 +5218,6 @@
   i32.add
   i32.const -64
   i32.sub
-  tee_local $5
   get_local $7
   get_local $4
   get_global $~lib/internal/number/_exp
@@ -5315,14 +5294,14 @@
   get_local $4
   i32.eqz
   tee_local $2
-  if
+  if (result i32)
    get_local $0
    i32.load
    get_local $1
    i32.eq
-   set_local $2
+  else   
+   get_local $2
   end
-  get_local $2
   if
    get_local $0
    return
@@ -5850,7 +5829,8 @@
    unreachable
   end
   get_global $std/string/str
-  get_global $std/string/str
+  tee_local $0
+  get_local $0
   i32.const 0
   call $~lib/string/String#indexOf
   if
@@ -6903,7 +6883,7 @@
   i32.const 1
   i32.eq
   tee_local $0
-  if
+  if (result i32)
    i32.const 0
    get_global $std/string/sa
    i32.load
@@ -6918,12 +6898,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 256
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -6960,7 +6939,7 @@
   i32.const 1
   i32.eq
   tee_local $0
-  if
+  if (result i32)
    i32.const 0
    get_global $std/string/sa
    i32.load
@@ -6975,12 +6954,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 256
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7001,7 +6979,7 @@
   i32.const 1
   i32.eq
   tee_local $0
-  if
+  if (result i32)
    i32.const 0
    get_global $std/string/sa
    i32.load
@@ -7016,12 +6994,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1216
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7037,56 +7014,58 @@
   i32.const 432
   call $~lib/string/String#split|trampoline
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 3
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    get_global $std/string/sa
+    i32.load offset=4
+    i32.const 3
+    i32.eq
+    tee_local $0
+    if
+     i32.const 0
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 280
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 1
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 4
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 648
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
+  if (result i32)
    i32.const 2
    get_global $std/string/sa
    i32.load
@@ -7103,12 +7082,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7124,56 +7102,58 @@
   i32.const 1272
   call $~lib/string/String#split|trampoline
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 3
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    get_global $std/string/sa
+    i32.load offset=4
+    i32.const 3
+    i32.eq
+    tee_local $0
+    if
+     i32.const 0
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 280
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 1
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 4
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 648
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
+  if (result i32)
    i32.const 2
    get_global $std/string/sa
    i32.load
@@ -7190,12 +7170,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7211,79 +7190,82 @@
   i32.const 432
   call $~lib/string/String#split|trampoline
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 4
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    block (result i32)
+     get_global $std/string/sa
+     i32.load offset=4
+     i32.const 4
+     i32.eq
+     tee_local $0
+     if
+      i32.const 0
+      get_global $std/string/sa
+      i32.load
+      tee_local $0
+      i32.load
+      i32.const 2
+      i32.shr_u
+      i32.lt_u
+      if (result i32)
+       get_local $0
+       i32.load offset=8
+      else       
+       unreachable
+      end
+      i32.const 280
+      call $~lib/string/String.__eq
+      set_local $0
+     end
+     get_local $0
+    end
+    if
+     i32.const 1
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.const 4
+      i32.add
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 648
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 2
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 8
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 256
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
-   i32.const 2
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 8
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
-   end
-   tee_local $0
-   i32.const 256
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
+  if (result i32)
    i32.const 3
    get_global $std/string/sa
    i32.load
@@ -7300,12 +7282,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7321,79 +7302,82 @@
   i32.const 432
   call $~lib/string/String#split|trampoline
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 4
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    block (result i32)
+     get_global $std/string/sa
+     i32.load offset=4
+     i32.const 4
+     i32.eq
+     tee_local $0
+     if
+      i32.const 0
+      get_global $std/string/sa
+      i32.load
+      tee_local $0
+      i32.load
+      i32.const 2
+      i32.shr_u
+      i32.lt_u
+      if (result i32)
+       get_local $0
+       i32.load offset=8
+      else       
+       unreachable
+      end
+      i32.const 256
+      call $~lib/string/String.__eq
+      set_local $0
+     end
+     get_local $0
+    end
+    if
+     i32.const 1
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.const 4
+      i32.add
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 280
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 256
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 2
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 8
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 648
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
-   i32.const 2
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 8
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
-   end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
+  if (result i32)
    i32.const 3
    get_global $std/string/sa
    i32.load
@@ -7410,12 +7394,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7431,79 +7414,82 @@
   i32.const 432
   call $~lib/string/String#split|trampoline
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 4
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    block (result i32)
+     get_global $std/string/sa
+     i32.load offset=4
+     i32.const 4
+     i32.eq
+     tee_local $0
+     if
+      i32.const 0
+      get_global $std/string/sa
+      i32.load
+      tee_local $0
+      i32.load
+      i32.const 2
+      i32.shr_u
+      i32.lt_u
+      if (result i32)
+       get_local $0
+       i32.load offset=8
+      else       
+       unreachable
+      end
+      i32.const 280
+      call $~lib/string/String.__eq
+      set_local $0
+     end
+     get_local $0
+    end
+    if
+     i32.const 1
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.const 4
+      i32.add
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 648
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 2
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 8
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 1240
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
-   i32.const 2
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 8
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
-   end
-   tee_local $0
-   i32.const 1240
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
+  if (result i32)
    i32.const 3
    get_global $std/string/sa
    i32.load
@@ -7520,12 +7506,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 256
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7541,56 +7526,58 @@
   i32.const 256
   call $~lib/string/String#split|trampoline
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 3
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    get_global $std/string/sa
+    i32.load offset=4
+    i32.const 3
+    i32.eq
+    tee_local $0
+    if
+     i32.const 0
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 280
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 1
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 4
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 648
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
+  if (result i32)
    i32.const 2
    get_global $std/string/sa
    i32.load
@@ -7607,12 +7594,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7647,7 +7633,7 @@
   i32.const 1
   i32.eq
   tee_local $0
-  if
+  if (result i32)
    i32.const 0
    get_global $std/string/sa
    i32.load
@@ -7662,12 +7648,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 280
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7687,7 +7672,7 @@
   i32.const 1
   i32.eq
   tee_local $0
-  if
+  if (result i32)
    i32.const 0
    get_global $std/string/sa
    i32.load
@@ -7702,12 +7687,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 280
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7722,56 +7706,58 @@
   i32.const 4
   call $~lib/string/String#split
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 3
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    get_global $std/string/sa
+    i32.load offset=4
+    i32.const 3
+    i32.eq
+    tee_local $0
+    if
+     i32.const 0
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 280
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 1
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 4
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 648
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
+  if (result i32)
    i32.const 2
    get_global $std/string/sa
    i32.load
@@ -7788,12 +7774,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7808,56 +7793,58 @@
   i32.const -1
   call $~lib/string/String#split
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 3
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    get_global $std/string/sa
+    i32.load offset=4
+    i32.const 3
+    i32.eq
+    tee_local $0
+    if
+     i32.const 0
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 280
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 1
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 4
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 648
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
+  if (result i32)
    i32.const 2
    get_global $std/string/sa
    i32.load
@@ -7874,12 +7861,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0
@@ -7894,56 +7880,58 @@
   i32.const -1
   call $~lib/string/String#split
   set_global $std/string/sa
-  get_global $std/string/sa
-  i32.load offset=4
-  i32.const 3
-  i32.eq
-  tee_local $0
-  if
-   i32.const 0
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
+  block (result i32)
+   block (result i32)
+    get_global $std/string/sa
+    i32.load offset=4
+    i32.const 3
+    i32.eq
+    tee_local $0
+    if
+     i32.const 0
+     get_global $std/string/sa
+     i32.load
+     tee_local $0
+     i32.load
+     i32.const 2
+     i32.shr_u
+     i32.lt_u
+     if (result i32)
+      get_local $0
+      i32.load offset=8
+     else      
+      unreachable
+     end
+     i32.const 280
+     call $~lib/string/String.__eq
+     set_local $0
+    end
     get_local $0
-    i32.load offset=8
-   else    
-    unreachable
    end
-   tee_local $0
-   i32.const 280
-   call $~lib/string/String.__eq
-   set_local $0
-  end
-  get_local $0
-  if
-   i32.const 1
-   get_global $std/string/sa
-   i32.load
-   tee_local $0
-   i32.load
-   i32.const 2
-   i32.shr_u
-   i32.lt_u
-   if (result i32)
-    get_local $0
-    i32.const 4
-    i32.add
-    i32.load offset=8
-   else    
-    unreachable
+   if
+    i32.const 1
+    get_global $std/string/sa
+    i32.load
+    tee_local $0
+    i32.load
+    i32.const 2
+    i32.shr_u
+    i32.lt_u
+    if (result i32)
+     get_local $0
+     i32.const 4
+     i32.add
+     i32.load offset=8
+    else     
+     unreachable
+    end
+    i32.const 648
+    call $~lib/string/String.__eq
+    set_local $0
    end
-   tee_local $0
-   i32.const 648
-   call $~lib/string/String.__eq
-   set_local $0
+   get_local $0
   end
-  get_local $0
-  if
+  if (result i32)
    i32.const 2
    get_global $std/string/sa
    i32.load
@@ -7960,12 +7948,11 @@
    else    
     unreachable
    end
-   tee_local $0
    i32.const 1240
    call $~lib/string/String.__eq
-   set_local $0
+  else   
+   get_local $0
   end
-  get_local $0
   i32.eqz
   if
    i32.const 0