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compact the local variable table if there multiple of the same type

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Volker Berlin 2019-06-15 12:29:59 +02:00
parent 0a4d03e974
commit 2b67b6b1da
1 changed files with 21 additions and 6 deletions
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27
src/de/inetsoftware/jwebassembly/binary/BinaryModuleWriter.java
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@ -583,15 +583,30 @@ public class BinaryModuleWriter extends ModuleWriter implements InstructionOpcod
*/
@Override
protected void writeMethodFinish() throws IOException {
WasmOutputStream localsStream = new WasmOutputStream();
localsStream.writeVaruint32( locals.size() );
for( AnyType valueType : locals ) {
localsStream.writeVaruint32( 1 ); // TODO optimize, write the count of same types.
localsStream.writeRefValueType( valueType );
@SuppressWarnings( "resource" )
WasmOutputStream localsTypeStream = new WasmOutputStream();
int localEntryCount = 0; // number of local entries in output
int varCount = locals.size();
for( int i = 0; i < varCount; ) {
AnyType valueType = locals.get( i++ );
int count = 1; // number of local variables of the same type
while( i < varCount && locals.get( i ) == valueType ) {
count++;
i++;
}
localsTypeStream.writeVaruint32( count );
localsTypeStream.writeRefValueType( valueType );
localEntryCount++;
}
@SuppressWarnings( "resource" )
WasmOutputStream localsStream = new WasmOutputStream();
localsStream.writeVaruint32( localEntryCount );
WasmOutputStream functionsStream = function.functionsStream = new WasmOutputStream();
functionsStream.writeVaruint32( localsStream.size() + codeStream.size() + 1 );
functionsStream.writeVaruint32( localsStream.size() + localsTypeStream.size() + codeStream.size() + 1 );
localsStream.writeTo( functionsStream );
localsTypeStream.writeTo( functionsStream );
function.addCodeOffset( functionsStream.size() );
codeStream.writeTo( functionsStream );
functionsStream.write( END );