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use the ValueStackManager to start the switch block on the value

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declaration
This commit is contained in:
Volker Berlin 2018-05-07 18:46:15 +02:00
parent f75b770200
commit 0ece5f2dfe
2 changed files with 40 additions and 15 deletions
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17
src/de/inetsoftware/jwebassembly/module/BranchManger.java
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@ -73,8 +73,8 @@ class BranchManger {
* the values of the cases
* @param positions
* the code positions
* @param the
* code position of the default block
* @param defaultPosition
* the code position of the default block
*/
void startSwitch( int startPosition, int offset, int lineNumber, int[] keys, int[] positions, int defaultPosition ) {
allParsedOperations.add( new SwitchParsedBlock( startPosition, offset, lineNumber, keys, positions, defaultPosition ) );
@ -209,7 +209,7 @@ class BranchManger {
* the not consumed operations in the parent branch
*/
private void caculateSwitch( BranchNode parent, SwitchParsedBlock switchBlock, List<ParsedBlock> parsedOperations ) {
int startPosition = switchBlock.startPosition;
int startPosition = ((ParsedBlock)switchBlock).startPosition;
int posCount = switchBlock.positions.length;
boolean isTable = switchBlock.keys.length == 1;
if( isTable ) {
@ -228,13 +228,16 @@ class BranchManger {
Arrays.sort( cases, (a, b) -> Integer.compare( a.position, b.position ) );
int blockCount = 0;
int lastPosition = -1;
BranchNode brTableNode = new BranchNode( startPosition, startPosition, WasmBlockOperator.BR_TABLE, null );
BranchNode blockNode = brTableNode;
BranchNode brTableNode = null;
BranchNode blockNode = null;
for( int i = 0; i < cases.length; i++ ) {
switchCase = cases[i];
switchCase.block = blockCount;
int currentPosition = switchCase.position;
if( lastPosition != currentPosition ) {
if( blockNode == null ) {
blockNode = brTableNode = new BranchNode( currentPosition, currentPosition, WasmBlockOperator.BR_TABLE, null );
}
lastPosition = currentPosition;
blockCount++;
BranchNode node = new BranchNode( startPosition, startPosition + currentPosition, WasmBlockOperator.BLOCK, WasmBlockOperator.END );
@ -303,9 +306,9 @@ class BranchManger {
private static class ParsedBlock {
private JavaBlockOperator op;
int startPosition;
private int startPosition;
int endPosition;
private int endPosition;
private int lineNumber;

38
src/de/inetsoftware/jwebassembly/module/ModuleWriter.java
View File

@ -53,6 +53,8 @@ public abstract class ModuleWriter implements Closeable {
private BranchManger branchManager = new BranchManger();
private ValueStackManger stackManager = new ValueStackManger();
/**
* Prepare the content of the class.
*
@ -133,6 +135,7 @@ public abstract class ModuleWriter implements Closeable {
locals.clear();
localTable = code.getLocalVariableTable();
stackManager.reset();
branchManager.reset();
for( CodeInputStream byteCode : code.getByteCodes() ) {
prepareBranchManager( byteCode, lineNumber = byteCode.getLineNumber() );
@ -296,12 +299,30 @@ public abstract class ModuleWriter implements Closeable {
while( byteCode.available() > 0 ) {
int op = byteCode.readUnsignedByte();
switch( op ) {
case 21: // iload
stackManager.add( ValueType.i32, byteCode.getCodePosition() - 1 );
byteCode.skip(1);
break;
case 22: // lload
stackManager.add( ValueType.i64, byteCode.getCodePosition() - 1 );
byteCode.skip(1);
break;
case 23: // fload
stackManager.add( ValueType.f32, byteCode.getCodePosition() - 1 );
byteCode.skip(1);
break;
case 24: // dload
stackManager.add( ValueType.f64, byteCode.getCodePosition() - 1 );
byteCode.skip(1);
break;
case 26: // iload_0
case 27: // iload_1
case 28: // iload_2
case 29: // iload_3
stackManager.add( ValueType.i32, byteCode.getCodePosition() - 1 );
break;
case 16: // bipush
case 18: // ldc
case 21: //iload
case 22: //lload
case 23: //fload
case 24: //dload
case 25: //aload
case 54: // istore
case 55: // lstore
@ -351,7 +372,7 @@ public abstract class ModuleWriter implements Closeable {
}
startPosition--;
int defaultPosition = offset = byteCode.readInt();
int defaultPosition = startPosition + byteCode.readInt();
int[] keys;
int[] positions;
if( op == 171 ) { // lookupswitch
@ -360,7 +381,7 @@ public abstract class ModuleWriter implements Closeable {
positions = new int[nPairs];
for( int i = 0; i < nPairs; i++ ) {
keys[i] = byteCode.readInt();
offset = Math.max( offset, positions[i] = byteCode.readInt() );
positions[i] = startPosition + byteCode.readInt();
}
} else {
int low = byteCode.readInt();
@ -368,10 +389,11 @@ public abstract class ModuleWriter implements Closeable {
int count = byteCode.readInt() - low + 1;
positions = new int[count];
for( int i = 0; i < count; i++ ) {
offset = Math.max( offset, positions[i] = byteCode.readInt() );
positions[i] = startPosition + byteCode.readInt();
}
}
branchManager.startSwitch( startPosition, offset, lineNumber, keys, positions, defaultPosition );
int switchValuestartPosition = stackManager.getCodePosition( 0 );
branchManager.startSwitch( switchValuestartPosition, 0, lineNumber, keys, positions, defaultPosition );
break;
}
}