Add two to four bytes utf8 character tests (#2495)

Author: JesseCodeBones

Diff for: tests/compiler/std/string-encoding.debug.wat

@@ -148,15 +148,15 @@ function testUTF8DecodeUnsafe(): void {
 }
 testUTF8DecodeUnsafe();
 
-function testLarge(str: string): void {
+function testRoundtrip(str: string): void {
   var buf8 = String.UTF8.encode(str);
   assert(String.UTF8.decode(buf8) == str);
   var buf16 = String.UTF16.encode(str);
   assert(String.UTF16.decode(buf16) == str);
 }
 
 // https://www.w3.org/2001/06/utf-8-test/UTF-8-demo.html
-testLarge(`Mathematics and Sciences:
+testRoundtrip(`Mathematics and Sciences:
 
 ∮ E⋅da = Q,  n → ∞, ∑ f(i) = ∏ g(i), ∀x∈ℝ: ⌈x⌉ = −⌊−x⌋, α ∧ ¬β = ¬(¬α ∨ β),
 
@@ -349,7 +349,7 @@ Box drawing alignment tests:                                          █
 `);
 
 // https://www.cl.cam.ac.uk/~mgk25/ucs/examples/quickbrown.txt
-testLarge(`Sentences that contain all letters commonly used in a language
+testRoundtrip(`Sentences that contain all letters commonly used in a language
 --------------------------------------------------------------
 
 Markus Kuhn <http://www.cl.cam.ac.uk/~mgk25/> -- 2012-04-11
@@ -490,6 +490,13 @@ Turkish (tr)
 
   Pijamalı hasta, yağız şoföre çabucak güvendi.
   (=Patient with pajamas, trusted swarthy driver quickly)
+
+Other
+-----
+
+  ÀÈ / c3_80 c3_88
+  变量 / e5_8f_98 e9_87_8f
+  𠜎𠜱 / f0_a0_9c_8e f0_a0_9c_b1
 `);
 
 __collect();

Diff for: tests/compiler/std/string-encoding.release.wat

@@ -66,10 +66,10 @@
  (global $~lib/util/number/_K (mut i32) (i32.const 0))
  (global $~lib/util/number/_frc_pow (mut i64) (i64.const 0))
  (global $~lib/util/number/_exp_pow (mut i32) (i32.const 0))
- (global $~lib/rt/__rtti_base i32 (i32.const 25296))
- (global $~lib/memory/__data_end i32 (i32.const 25340))
- (global $~lib/memory/__stack_pointer (mut i32) (i32.const 41724))
- (global $~lib/memory/__heap_base i32 (i32.const 41724))
+ (global $~lib/rt/__rtti_base i32 (i32.const 25392))
+ (global $~lib/memory/__data_end i32 (i32.const 25436))
+ (global $~lib/memory/__stack_pointer (mut i32) (i32.const 41820))
+ (global $~lib/memory/__heap_base i32 (i32.const 41820))
  (memory $0 1)
  (data (i32.const 12) "<\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00 \00\00\00h\00i\00,\00 \00I\00\'\00m\00 \00a\00 \00s\00t\00r\00i\00n\00g\00\00\00\00\00\00\00\00\00\00\00\00\00")
  (data (i32.const 76) ",\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\1a\00\00\00s\00t\00d\00/\00s\00t\00r\00i\00n\00g\00.\00t\00s\00\00\00")
@@ -539,7 +539,10 @@
  (data (i32.const 25180) "\1c\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\n\00\00\00W\00o\00r\00l\00d\00\00\00")
  (data (i32.const 25212) ",\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\16\00\00\00H\00e\00l\00l\00o\00 \00W\00o\00r\00l\00d\00\00\00\00\00\00\00")
  (data (i32.const 25260) "\1c\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\06\00\00\00b\00a\00r\00\00\00\00\00\00\00")
- (data (i32.const 25296) "\05\00\00\00 \00\00\00\00\00\00\00 \00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\02\t\00\00\00\00\00\00\02A\00\00\00\00\00\00")
+ (data (i32.const 25292) "\1c\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\04\00\00\00\c0\00\c8\00\00\00\00\00\00\00\00\00")
+ (data (i32.const 25324) "\1c\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\04\00\00\00\d8S\cf\91\00\00\00\00\00\00\00\00")
+ (data (i32.const 25356) "\1c\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\08\00\00\00A\d8\0e\dfA\d81\df\00\00\00\00")
+ (data (i32.const 25392) "\05\00\00\00 \00\00\00\00\00\00\00 \00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\02\t\00\00\00\00\00\00\02A\00\00\00\00\00\00")
  (table $0 1 1 funcref)
  (elem $0 (i32.const 1))
  (export "getString" (func $std/string/getString))
@@ -8102,8 +8105,8 @@
   global.get $~lib/memory/__data_end
   i32.lt_s
   if
-   i32.const 41744
-   i32.const 41792
+   i32.const 41840
+   i32.const 41888
    i32.const 1
    i32.const 1
    call $~lib/builtins/abort
@@ -24238,6 +24241,94 @@
    call $~lib/builtins/abort
    unreachable
   end
+  i32.const 25312
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0
+  local.get $4
+  i32.const 25312
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0 offset=4
+  local.get $4
+  call $~lib/string/String.__eq
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 96
+   i32.const 816
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+  i32.const 25312
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0
+  local.get $4
+  i32.const 25312
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0 offset=4
+  local.get $4
+  call $~lib/string/String.__eq
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 96
+   i32.const 817
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+  i32.const 25344
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0
+  local.get $4
+  i32.const 25344
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0 offset=4
+  local.get $4
+  call $~lib/string/String.__eq
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 96
+   i32.const 818
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+  i32.const 25376
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0
+  local.get $4
+  i32.const 25376
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0 offset=4
+  local.get $4
+  call $~lib/string/String.__eq
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 96
+   i32.const 819
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
   i32.const 0
   global.set $std/string/str
   global.get $~lib/memory/__heap_base