backup/JWebAssembly
1
0
Fork 0
mirror of https://github.com/i-net-software/JWebAssembly.git synced 2025-03-15 02:44:47 +01:00
Code Issues Projects Releases Activity

Use variable slot instead variable index for duplicate of THIS of on virtual calls

Browse Source
This commit is contained in:
Volker Berlin 2022-02-13 22:38:14 +01:00
parent 1f045f312d
commit a28d966b94
3 changed files with 30 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/de/inetsoftware/jwebassembly/module/DupThis.java
View File

@ -1,5 +1,5 @@
/*
Copyright 2019 - 2021 Volker Berlin (i-net software)
Copyright 2019 - 2022 Volker Berlin (i-net software)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -30,22 +30,27 @@ class DupThis extends WasmInstruction {
private WasmCallIndirectInstruction virtualCall;
private int tempVarIdx;
private int tempVarSlot;
private LocaleVariableManager localVariables;
/**
* Create a instance.
*
* @param virtualCall
* the related virtual function call.
* @param tempVarIdx
* the index of the temporary variable
* @param tempVarSlot
* the slot of the temporary variable
* @param localVariables
* the manager for local variables
* @param javaCodePos
* the code position
*/
DupThis( WasmCallIndirectInstruction virtualCall, int tempVarIdx, int javaCodePos ) {
DupThis( WasmCallIndirectInstruction virtualCall, int tempVarSlot, LocaleVariableManager localVariables, int javaCodePos ) {
super( javaCodePos, virtualCall.getLineNumber() );
this.virtualCall = virtualCall;
this.tempVarIdx = tempVarIdx;
this.tempVarSlot = tempVarSlot;
this.localVariables = localVariables;
}
/**
@ -62,7 +67,7 @@ class DupThis extends WasmInstruction {
@Override
void writeTo( ModuleWriter writer ) throws IOException {
if( virtualCall.isVirtual() ) {
writer.writeLocal( VariableOperator.tee, tempVarIdx );
writer.writeLocal( VariableOperator.tee, localVariables.get( tempVarSlot, getCodePosition() ) );
}
}

19
src/de/inetsoftware/jwebassembly/module/WasmCallIndirectInstruction.java
View File

@ -1,5 +1,5 @@
/*
Copyright 2019 - 2020 Volker Berlin (i-net software)
Copyright 2019 - 2022 Volker Berlin (i-net software)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -28,7 +28,9 @@ abstract class WasmCallIndirectInstruction extends WasmCallInstruction {
private final StructType type;
private int tempVarIdx;
private int tempVarSlot;
private LocaleVariableManager localVariables;
/**
* Create an instance of a function call instruction
@ -57,11 +59,14 @@ abstract class WasmCallIndirectInstruction extends WasmCallInstruction {
}
/**
* Set the variable index on which this can be found.
* @param tempVarIdx the index
* Set the Java variable slot on which THIS can be found.
* @param tempVarSlot the slot
* @param localVariables
* the manager for local variables to resolve the index
*/
void setVariableIndexOfThis( int tempVarIdx ) {
this.tempVarIdx = tempVarIdx;
void setVariableSlotOfThis( int tempVarSlot, LocaleVariableManager localVariables ) {
this.tempVarSlot = tempVarSlot;
this.localVariables = localVariables;
}
/**
@ -70,7 +75,7 @@ abstract class WasmCallIndirectInstruction extends WasmCallInstruction {
* @return the index of the variable
*/
int getVariableIndexOfThis() {
return tempVarIdx;
return localVariables.get( tempVarSlot, getCodePosition() );
}
/**

12
src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java
View File

@ -676,21 +676,21 @@ public abstract class WasmCodeBuilder {
int javaCodePos = indirectCall.getCodePosition();
StackValue stackValue = StackInspector.findInstructionThatPushValue( instructions, count, javaCodePos );
WasmInstruction instr = stackValue.instr;
int varIndex = -1;
int varSlot = -1;
// if it is a GET to a local variable then we can use it
if( instr.getType() == Type.Local ) {
WasmLocalInstruction local1 = (WasmLocalInstruction)instr;
if( local1.getOperator() == VariableOperator.get ) {
varIndex = local1.getIndex();
varSlot = local1.getSlot();
}
}
//alternate we need to create a new locale variable
if( varIndex < 0 ) {
varIndex = getTempVariable( indirectCall.getThisType(), instr.getCodePosition(), javaCodePos + 1 );
if( varSlot < 0 ) {
varSlot = getTempVariable( indirectCall.getThisType(), instr.getCodePosition(), javaCodePos + 1 );
int idx = count == 1 ? instructions.size() : stackValue.idx + 1;
instructions.add( idx, new DupThis( indirectCall, varIndex, instr.getCodePosition() + 1 ) );
instructions.add( idx, new DupThis( indirectCall, varSlot, localVariables, instr.getCodePosition() + 1 ) );
}
indirectCall.setVariableIndexOfThis( varIndex );
indirectCall.setVariableSlotOfThis( varSlot, localVariables );
instructions.add( indirectCall );
options.registerGet_i32(); // for later access of the vtable
}