Optimize strlen and strchr on ARM (#262)

Author: ncruces

embed/bcw2/bcw2.wasm

@@ -60,7 +60,7 @@ cd ~-
 
 "$BINARYEN/wasm-ctor-eval" -g -c _initialize bcw2.wasm -o bcw2.tmp
 "$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
-	bcw2.tmp -o bcw2.wasm \
+	bcw2.tmp -o bcw2.wasm --low-memory-unused \
 	--enable-simd --enable-mutable-globals --enable-multivalue \
 	--enable-bulk-memory --enable-reference-types \
 	--enable-nontrapping-float-to-int --enable-sign-ext

embed/bcw2/build.sh

@@ -27,7 +27,7 @@ trap 'rm -f sqlite3.tmp' EXIT
 
 "$BINARYEN/wasm-ctor-eval" -g -c _initialize sqlite3.wasm -o sqlite3.tmp
 "$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
-	sqlite3.tmp -o sqlite3.wasm \
+	sqlite3.tmp -o sqlite3.wasm --low-memory-unused \
 	--enable-simd --enable-mutable-globals --enable-multivalue \
 	--enable-bulk-memory --enable-reference-types \
 	--enable-nontrapping-float-to-int --enable-sign-ext

embed/build.sh

@@ -18,6 +18,8 @@ trap 'rm -f libc.tmp' EXIT
 	-mbulk-memory -mreference-types \
 	-mnontrapping-fptoint -msign-ext \
 	-fno-stack-protector -fno-stack-clash-protection \
+	-Wl,--stack-first \
+	-Wl,--import-undefined \
 	-Wl,--initial-memory=16777216 \
 	-Wl,--export=memchr \
 	-Wl,--export=memcmp \