- Investigating clang's handling of memory builtins and bulk memory code generation in test/bulkmem

- Using bulk memory (via builtins) for memset/memcpy/memcmp
- Change build script to build wasm3 with optimizations on

build.sh

@@ -31,7 +31,7 @@ elif [ $target = wasm3 ] ; then
 	for file in ./ext/wasm3/source/*.c ; do
 		name=$(basename $file)
 		name=${name/.c/.o}
-		clang -c -g -foptimize-sibling-calls -Wno-extern-initializer -Dd_m3VerboseErrorMessages -o ./bin/obj/$name -I./ext/wasm3/source $file
+		clang -c -g -O2 -foptimize-sibling-calls -Wno-extern-initializer -Dd_m3VerboseErrorMessages -o ./bin/obj/$name -I./ext/wasm3/source $file
 	done
 	ar -rcs ./bin/libwasm3.a ./bin/obj/*.o
 	rm -rf ./bin/obj

samples/pong/build.sh

@@ -18,6 +18,7 @@ wasmFlags="--target=wasm32 \
        -Wl,--export-dynamic \
        -g \
        -O2 \
+       -mbulk-memory \
        -D__ORCA__ \
 	   -isystem ../../cstdlib/include -I ../../sdk -I../../milepost/ext -I ../../milepost -I ../../milepost/src -I ../../milepost/src/util -I ../../milepost/src/platform -I../.."
 

test/bulkmem/build.sh

@@ -0,0 +1,24 @@
+
+#!/bin/bash
+
+set -euo pipefail
+
+if [[ -x /usr/local/opt/llvm/bin/clang ]]; then
+  CLANG=/usr/local/opt/llvm/bin/clang
+elif [[ -x /opt/homebrew/opt/llvm/bin/clang ]]; then
+  CLANG=/opt/homebrew/opt/llvm/bin/clang
+else
+  echo "Could not find Homebrew clang; this script will probably not work."
+  CLANG=clang
+fi
+
+wasmFlags="--target=wasm32 \
+       --no-standard-libraries \
+       -Wl,--no-entry \
+       -Wl,--export-all \
+       -Wl,--allow-undefined \
+       -g \
+       -mbulk-memory"
+
+$CLANG $wasmFlags -o ./module.wasm main.c
+wasm2wat module.wasm > module.wat

test/bulkmem/main.c

@@ -0,0 +1,38 @@
+/************************************************************//**
+*
+*	@file: main.c
+*	@author: Martin Fouilleul
+*	@date: 25/06/2023
+*
+*****************************************************************/
+
+#include<stddef.h>
+#include<stdint.h>
+
+void* memset(void* b, int c, size_t n)
+{
+	return(__builtin_memset(b, c, n));
+}
+
+void* memcpy(void* dst, const void* src, size_t n)
+{
+	return(__builtin_memcpy(dst, src, n));
+}
+
+int _start()
+{
+	uint8_t buffer[1024];
+	uint8_t dst[1024];
+	memset(buffer, 0xff, 1024);
+	if(buffer[32] != 0xff)
+	{
+		__builtin_unreachable();
+	}
+
+	memcpy(dst, buffer, 1024);
+	if(dst[32] != 0xff)
+	{
+		__builtin_unreachable();
+	}
+	return(0);
+}