Examples with VariableAssignmentExpression de.mirkosertic.bytecoder.ssa.VariableAssignmentExpression used on opensource projects

Example 1 with VariableAssignmentExpression

use of de.mirkosertic.bytecoder.ssa.VariableAssignmentExpression in project Bytecoder by mirkosertic.

the class RedundantAssignmentOptimizer method visit.

@Override
protected void visit(ControlFlowGraph aGraph, ExpressionList aList, Expression aExpression, BytecodeLinkerContext aLinkerContext) {
    // Check if a variable assignment is before the current expression
    Expression theBefore = aList.predecessorOf(aExpression);
    if (theBefore instanceof VariableAssignmentExpression) {
        VariableAssignmentExpression theAssignment = (VariableAssignmentExpression) theBefore;
        Variable theVariable = theAssignment.getVariable();
        Value theValue = theAssignment.getValue();
        // Check if there is only one data flow
        List<Edge> theDataEdges = theVariable.outgoingEdges(DataFlowEdgeType.filter()).collect(Collectors.toList());
        if (theDataEdges.size() == 1) {
            List<Value> theIncomingData = aExpression.incomingDataFlows();
            if (theIncomingData.contains(theVariable)) {
                aExpression.replaceIncomingDataEdge(theVariable, theValue);
                aList.remove(theAssignment);
                aGraph.getProgram().deleteVariable(theVariable);
            }
        }
    }
}

Example 2 with VariableAssignmentExpression

use of de.mirkosertic.bytecoder.ssa.VariableAssignmentExpression in project Bytecoder by mirkosertic.

the class OpenCLWriter method writeExpressions.

private void writeExpressions(ExpressionList aList) {
    for (Expression theExpression : aList.toList()) {
        if (options.isDebugOutput()) {
            String theComment = theExpression.getComment();
            if (theComment != null && !theComment.isEmpty()) {
                print("// ");
                println(theComment);
            }
        }
        if (theExpression instanceof VariableAssignmentExpression) {
            VariableAssignmentExpression theInit = (VariableAssignmentExpression) theExpression;
            Variable theVariable = theInit.getVariable();
            Value theValue = theInit.getValue();
            if (theVariable.resolveType().isObject() && theValue instanceof InvocationExpression) {
                print(toType(theVariable.resolveType(), false));
                print(" ");
                print(theVariable.getName());
                print("_temp = ");
                printValue(theValue);
                println(";");
                print(theVariable.getName());
                print(" = &");
                print(theVariable.getName());
                println("_temp;");
            } else {
                print(theVariable.getName());
                print(" = ");
                printValue(theValue);
                println(";");
            }
        } else if (theExpression instanceof ArrayStoreExpression) {
            ArrayStoreExpression theStore = (ArrayStoreExpression) theExpression;
            List<Value> theIncomingData = theStore.incomingDataFlows();
            Value theArray = theIncomingData.get(0);
            Value theIndex = theIncomingData.get(1);
            Value theValue = theIncomingData.get(2);
            printValue(theArray);
            print("[");
            printValue(theIndex);
            print("] = ");
            printValue(theValue);
            println(";");
        } else if (theExpression instanceof IFExpression) {
            IFExpression theE = (IFExpression) theExpression;
            print("if ");
            printValue(theE.incomingDataFlows().get(0));
            println(" {");
            withDeeperIndent().writeExpressions(theE.getExpressions());
            println("}");
        } else if (theExpression instanceof BreakExpression) {
            BreakExpression theBreak = (BreakExpression) theExpression;
            if (theBreak.isSetLabelRequired()) {
                print("$__label__ = ");
                print(theBreak.jumpTarget().getAddress());
                println(";");
            }
            if (!theBreak.isSilent()) {
                print("goto $");
                print(theBreak.blockToBreak().name());
                println("_next;");
            }
        } else if (theExpression instanceof ContinueExpression) {
            ContinueExpression theContinue = (ContinueExpression) theExpression;
            print("$__label__ = ");
            print(theContinue.jumpTarget().getAddress());
            println(";");
            print("goto $");
            print(theContinue.labelToReturnTo().name());
            println(";");
        } else if (theExpression instanceof ReturnExpression) {
            println("return;");
        } else if (theExpression instanceof PutFieldExpression) {
            PutFieldExpression thePutField = (PutFieldExpression) theExpression;
            List<Value> theIncomingData = thePutField.incomingDataFlows();
            Value theTarget = theIncomingData.get(0);
            BytecodeFieldRefConstant theField = thePutField.getField();
            Value thevalue = theIncomingData.get(1);
            printValue(theTarget);
            printInstanceFieldReference(theField);
            print(" = ");
            printValue(thevalue);
            println(";");
        } else if (theExpression instanceof ReturnValueExpression) {
            ReturnValueExpression theReturn = (ReturnValueExpression) theExpression;
            List<Value> theIncomingData = theReturn.incomingDataFlows();
            print("return ");
            printValue(theIncomingData.get(0));
            println(";");
        } else {
            throw new IllegalArgumentException("Not supported. " + theExpression);
        }
    }
}

Example 3 with VariableAssignmentExpression

use of de.mirkosertic.bytecoder.ssa.VariableAssignmentExpression in project Bytecoder by mirkosertic.

the class WASMSSAWriter method writeExpression.

private void writeExpression(Expression aExpression) {
    if (options.isDebugOutput()) {
        String theComment = aExpression.getComment();
        if (theComment != null && !theComment.isEmpty()) {
            print(";; ");
            println(theComment);
        }
    }
    if (aExpression instanceof CheckCastExpression) {
        return;
    }
    if (aExpression instanceof ReturnExpression) {
        writeReturnExpression((ReturnExpression) aExpression);
        return;
    }
    if (aExpression instanceof VariableAssignmentExpression) {
        writeInitVariableExpression((VariableAssignmentExpression) aExpression);
        return;
    }
    if (aExpression instanceof DirectInvokeMethodExpression) {
        writeDirectMethodInvokeExpression((DirectInvokeMethodExpression) aExpression);
        return;
    }
    if (aExpression instanceof IFExpression) {
        writeIFExpression((IFExpression) aExpression);
        return;
    }
    if (aExpression instanceof GotoExpression) {
        writeGotoExpression((GotoExpression) aExpression);
        return;
    }
    if (aExpression instanceof ReturnValueExpression) {
        writeReturnExpression((ReturnValueExpression) aExpression);
        return;
    }
    if (aExpression instanceof PutFieldExpression) {
        writePutFieldExpression((PutFieldExpression) aExpression);
        return;
    }
    if (aExpression instanceof SetMemoryLocationExpression) {
        writeSetMemoryLocationExpression((SetMemoryLocationExpression) aExpression);
        return;
    }
    if (aExpression instanceof PutStaticExpression) {
        writePutStaticExpression((PutStaticExpression) aExpression);
        return;
    }
    if (aExpression instanceof InvokeStaticMethodExpression) {
        writeInvokeStaticExpression((InvokeStaticMethodExpression) aExpression);
        return;
    }
    if (aExpression instanceof ThrowExpression) {
        writeThrowExpression((ThrowExpression) aExpression);
        return;
    }
    if (aExpression instanceof ArrayStoreExpression) {
        writeArrayStoreExpression((ArrayStoreExpression) aExpression);
        return;
    }
    if (aExpression instanceof InvokeVirtualMethodExpression) {
        writeInvokeVirtualExpression((InvokeVirtualMethodExpression) aExpression);
        return;
    }
    if (aExpression instanceof TableSwitchExpression) {
        writeTableSwitchExpression((TableSwitchExpression) aExpression);
        return;
    }
    if (aExpression instanceof LookupSwitchExpression) {
        writeLookupSwitchExpression((LookupSwitchExpression) aExpression);
        return;
    }
    if (aExpression instanceof UnreachableExpression) {
        writeUnreachable((UnreachableExpression) aExpression);
        return;
    }
    if (aExpression instanceof BreakExpression) {
        BreakExpression theBreak = (BreakExpression) aExpression;
        if (theBreak.isSetLabelRequired()) {
            print("(set_local $__label__ (i32.const ");
            print(theBreak.jumpTarget().getAddress());
            println("))");
        }
        if (!theBreak.isSilent()) {
            print("(br $");
            print(theBreak.blockToBreak().name());
            println(")");
        }
        return;
    }
    if (aExpression instanceof ContinueExpression) {
        ContinueExpression theContinue = (ContinueExpression) aExpression;
        print("(set_local $__label__ (i32.const ");
        print(theContinue.jumpTarget().getAddress());
        println("))");
        print("(br $");
        print(theContinue.labelToReturnTo().name());
        println("_inner)");
        return;
    }
    throw new IllegalStateException("Not supported : " + aExpression);
}

Example 4 with VariableAssignmentExpression

use of de.mirkosertic.bytecoder.ssa.VariableAssignmentExpression in project Bytecoder by mirkosertic.

the class RedundantAssignmentOptimizerTest method testBinaryOptimization.

@Test
public void testBinaryOptimization() {
    Program theProgram = new Program();
    ControlFlowGraph theGraph = new ControlFlowGraph(theProgram);
    RegionNode theStart = theGraph.createAt(BytecodeOpcodeAddress.START_AT_ZERO, RegionNode.BlockType.NORMAL);
    ExpressionList theExpressions = theStart.getExpressions();
    Variable theVariable1 = new Variable(TypeRef.Native.INT, "var1");
    Variable theVariable2 = new Variable(TypeRef.Native.INT, "var2");
    IntegerValue theInt1 = new IntegerValue(10);
    theVariable1.initializeWith(theInt1);
    theExpressions.add(new VariableAssignmentExpression(theVariable1, theInt1));
    IntegerValue theInt2 = new IntegerValue(20);
    theVariable2.initializeWith(theInt2);
    theExpressions.add(new VariableAssignmentExpression(theVariable2, theInt2));
    Variable theVariable3 = new Variable(TypeRef.Native.INT, "var3");
    BinaryExpression theBinary = new BinaryExpression(TypeRef.Native.INT, theVariable1, BinaryExpression.Operator.ADD, theVariable2);
    theVariable3.initializeWith(theBinary);
    theExpressions.add(new VariableAssignmentExpression(theVariable3, theBinary));
    theExpressions.add(new ReturnValueExpression(theVariable3));
    RedundantAssignmentOptimizer theOptimizer = new RedundantAssignmentOptimizer();
    theOptimizer.optimize(theGraph, null);
    System.out.println(theExpressions);
}

Example 5 with VariableAssignmentExpression

use of de.mirkosertic.bytecoder.ssa.VariableAssignmentExpression in project Bytecoder by mirkosertic.

the class JSSSAWriter method writeExpressions.

private void writeExpressions(ExpressionList aExpressions) {
    for (Expression theExpression : aExpressions.toList()) {
        if (options.isDebugOutput()) {
            String theComment = theExpression.getComment();
            if (theComment != null && !theComment.isEmpty()) {
                print("// ");
                println(theComment);
            }
        }
        if (theExpression instanceof ReturnExpression) {
            ReturnExpression theE = (ReturnExpression) theExpression;
            print("return");
            println(";");
        } else if (theExpression instanceof VariableAssignmentExpression) {
            VariableAssignmentExpression theE = (VariableAssignmentExpression) theExpression;
            Variable theVariable = theE.getVariable();
            Value theValue = theE.getValue();
            if (theValue instanceof ComputedMemoryLocationWriteExpression) {
                continue;
            }
            if (!program.isGlobalVariable(theVariable)) {
                print("var ");
            }
            print(theVariable.getName());
            print(" = ");
            print(theValue);
            print("; // type is ");
            println(theVariable.resolveType().resolve().name() + " value type is " + theValue.resolveType());
        } else if (theExpression instanceof PutStaticExpression) {
            PutStaticExpression theE = (PutStaticExpression) theExpression;
            BytecodeFieldRefConstant theField = theE.getField();
            Value theValue = theE.incomingDataFlows().get(0);
            printStaticFieldReference(theField);
            print(" = ");
            print(theValue);
            println(";");
        } else if (theExpression instanceof ReturnValueExpression) {
            ReturnValueExpression theE = (ReturnValueExpression) theExpression;
            Value theValue = theE.incomingDataFlows().get(0);
            print("return ");
            print(theValue);
            println(";");
        } else if (theExpression instanceof ThrowExpression) {
            ThrowExpression theE = (ThrowExpression) theExpression;
            Value theValue = theE.incomingDataFlows().get(0);
            print("throw ");
            print(theValue);
            println(";");
        } else if (theExpression instanceof InvokeVirtualMethodExpression) {
            InvokeVirtualMethodExpression theE = (InvokeVirtualMethodExpression) theExpression;
            print(theE);
            println(";");
        } else if (theExpression instanceof DirectInvokeMethodExpression) {
            DirectInvokeMethodExpression theE = (DirectInvokeMethodExpression) theExpression;
            print(theE);
            println(";");
        } else if (theExpression instanceof InvokeStaticMethodExpression) {
            InvokeStaticMethodExpression theE = (InvokeStaticMethodExpression) theExpression;
            print(theE);
            println(";");
        } else if (theExpression instanceof PutFieldExpression) {
            PutFieldExpression theE = (PutFieldExpression) theExpression;
            List<Value> theIncomingData = theE.incomingDataFlows();
            Value theTarget = theIncomingData.get(0);
            BytecodeFieldRefConstant theField = theE.getField();
            Value thevalue = theIncomingData.get(1);
            print(theTarget);
            printInstanceFieldReference(theField);
            print(" = ");
            print(thevalue);
            println(";");
        } else if (theExpression instanceof IFExpression) {
            IFExpression theE = (IFExpression) theExpression;
            print("if (");
            print(theE.incomingDataFlows().get(0));
            println(") {");
            withDeeperIndent().writeExpressions(theE.getExpressions());
            println("}");
        } else if (theExpression instanceof GotoExpression) {
            GotoExpression theE = (GotoExpression) theExpression;
            println(generateJumpCodeFor(theE.getJumpTarget()));
        } else if (theExpression instanceof ArrayStoreExpression) {
            ArrayStoreExpression theE = (ArrayStoreExpression) theExpression;
            List<Value> theIncomingData = theE.incomingDataFlows();
            Value theArray = theIncomingData.get(0);
            Value theIndex = theIncomingData.get(1);
            Value theValue = theIncomingData.get(2);
            print(theArray);
            printArrayIndexReference(theIndex);
            print(" = ");
            print(theValue);
            println(";");
        } else if (theExpression instanceof CheckCastExpression) {
            CheckCastExpression theE = (CheckCastExpression) theExpression;
        // Completely ignored
        } else if (theExpression instanceof TableSwitchExpression) {
            TableSwitchExpression theE = (TableSwitchExpression) theExpression;
            Value theValue = theE.incomingDataFlows().get(0);
            print("if (");
            print(theValue);
            print(" < ");
            print(theE.getLowValue());
            print(" || ");
            print(theValue);
            print(" > ");
            print(theE.getHighValue());
            println(") {");
            print(" ");
            writeExpressions(theE.getDefaultExpressions());
            println("}");
            print("switch(");
            print(theValue);
            print(" - ");
            print(theE.getLowValue());
            println(") {");
            for (Map.Entry<Long, ExpressionList> theEntry : theE.getOffsets().entrySet()) {
                print(" case ");
                print(theEntry.getKey());
                println(":");
                print("     ");
                writeExpressions(theEntry.getValue());
            }
            println("}");
            println("throw 'Illegal jump target!';");
        } else if (theExpression instanceof LookupSwitchExpression) {
            LookupSwitchExpression theE = (LookupSwitchExpression) theExpression;
            print("switch(");
            print(theE.incomingDataFlows().get(0));
            println(") {");
            for (Map.Entry<Long, ExpressionList> theEntry : theE.getPairs().entrySet()) {
                print(" case ");
                print(theEntry.getKey());
                println(":");
                print("     ");
                writeExpressions(theEntry.getValue());
            }
            println("}");
            writeExpressions(theE.getDefaultExpressions());
        } else if (theExpression instanceof SetMemoryLocationExpression) {
            SetMemoryLocationExpression theE = (SetMemoryLocationExpression) theExpression;
            List<Value> theIncomingData = theE.incomingDataFlows();
            print("bytecoderGlobalMemory[");
            ComputedMemoryLocationWriteExpression theValue = (ComputedMemoryLocationWriteExpression) theIncomingData.get(0);
            print(theValue);
            print("] = ");
            print(theIncomingData.get(1));
            println(";");
        } else if (theExpression instanceof UnreachableExpression) {
            println("throw 'Unreachable';");
        } else if (theExpression instanceof BreakExpression) {
            BreakExpression theBreak = (BreakExpression) theExpression;
            if (theBreak.isSetLabelRequired()) {
                print("__label__ = ");
                print(theBreak.jumpTarget().getAddress());
                println(";");
            }
            if (!theBreak.isSilent()) {
                print("break $");
                print(theBreak.blockToBreak().name());
                println(";");
            }
        } else if (theExpression instanceof ContinueExpression) {
            ContinueExpression theContinue = (ContinueExpression) theExpression;
            print("__label__ = ");
            print(theContinue.jumpTarget().getAddress());
            println(";");
            print("continue $");
            print(theContinue.labelToReturnTo().name());
            println(";");
        } else {
            throw new IllegalStateException("Not implemented : " + theExpression);
        }
    }
}