Simplify wasm

Author: calebsander

dist/lib/sha256-load.js

@@ -43,20 +43,23 @@
 				(i32.add (get_local $byteLength) (i32.const 63)) ;; could use up to 63 extra bytes
 			)
 		)
-		(set_local $needed ;; needed = (needed >> 16) + (needed % (1 << 16) ? 1 : 0) - memory.size
-			(i32.sub
-				(i32.add
-					(i32.shr_u (get_local $needed) (i32.const 16))
-					(select
-						(i32.const 1)
-						(i32.const 0)
-						(i32.and (get_local $needed) (i32.const 0xffff))
+		(if ;; if (needed > 0) memory.grow(needed)
+			(i32.gt_s
+				(tee_local $needed ;; needed = (needed >> 16) + (needed % (1 << 16) ? 1 : 0) - memory.size
+					(i32.sub
+						(i32.add
+							(i32.shr_u (get_local $needed) (i32.const 16))
+							(select
+								(i32.const 1)
+								(i32.const 0)
+								(i32.and (get_local $needed) (i32.const 0xffff))
+							)
+						)
+						(current_memory)
 					)
 				)
-				(current_memory)
+				(i32.const 0)
 			)
-		)
-		(if (i32.gt_s (get_local $needed) (i32.const 0)) ;; if (needed > 0) memory.grow(needed)
 			(drop (grow_memory (get_local $needed)))
 		)
 	)

lib/sha256.wast

@@ -26,7 +26,7 @@
 		"test": "test"
 	},
 	"scripts": {
-		"wabt": "bash -c '[[ -d wabt ]]' || (git clone --recursive https://github.com/WebAssembly/wabt && cd wabt && make gcc-release)",
+		"wabt": "bash -c '[[ -d wabt ]]' || (git clone --depth 1 https://github.com/WebAssembly/wabt && cd wabt && make gcc-release-no-tests)",
 		"wat2wasm": "npm run wabt && wabt/bin/wat2wasm lib/sha256.wast -o lib/sha256.wasm && ./wasm2ts.js lib/sha256",
 		"build": "npm run wat2wasm && rm -rf dist && tsc",
 		"build-client": "rm -rf compiled && webpack",