Heap fill/compare; Std string experiments

tests/compiler/recursive.wast

@@ -0,0 +1,84 @@
+(module
+ (type $ii (func (param i32) (result i32)))
+ (global $HEAP_BASE i32 (i32.const 4))
+ (memory $0 1)
+ (export "fib" (func $recursive/fib))
+ (export "memory" (memory $0))
+ (func $recursive/fib (; 0 ;) (type $ii) (param $0 i32) (result i32)
+  (if
+   (i32.le_s
+    (get_local $0)
+    (i32.const 1)
+   )
+   (return
+    (i32.const 1)
+   )
+  )
+  (return
+   (i32.add
+    (call $recursive/fib
+     (i32.sub
+      (get_local $0)
+      (i32.const 1)
+     )
+    )
+    (call $recursive/fib
+     (i32.sub
+      (get_local $0)
+      (i32.const 2)
+     )
+    )
+   )
+  )
+ )
+)
+(;
+[program.elements]
+  NaN
+  Infinity
+  isNaN
+  isFinite
+  clz
+  ctz
+  popcnt
+  rotl
+  rotr
+  abs
+  max
+  min
+  ceil
+  floor
+  copysign
+  nearest
+  reinterpret
+  sqrt
+  trunc
+  load
+  store
+  sizeof
+  select
+  unreachable
+  current_memory
+  grow_memory
+  parseInt
+  parseFloat
+  changetype
+  assert
+  i8
+  i16
+  i32
+  i64
+  u8
+  u16
+  u32
+  u64
+  bool
+  f32
+  f64
+  isize
+  usize
+  HEAP_BASE
+  recursive/fib
+[program.exports]
+  recursive/fib
+;)