public override void Transform(Context context, TransformContext transformContext)
{
var target = context.BranchTargets[0];
context.SetNop();
TransformContext.RemoveBlockFromPHIInstructions(context.Block, target);
}
public override void Transform(Context context, TransformContext transformContext)
{
var target = context.BranchTargets[0];
var block = context.Block;
context.SetInstruction(IRInstruction.Nop);
TransformContext.RemoveBlockFromPHIInstructions(block, target);
}
public override void Transform(Context context, TransformContext transformContext)
{
var target = context.BranchTargets[0];
var block = context.Block;
bool compare = true;
switch (context.ConditionCode)
{
case ConditionCode.Equal: compare = context.Operand1.ConstantUnsigned32 == context.Operand2.ConstantUnsigned32; break;
case ConditionCode.NotEqual: compare = context.Operand1.ConstantUnsigned32 != context.Operand2.ConstantUnsigned32; break;
case ConditionCode.GreaterOrEqual: compare = context.Operand1.ConstantUnsigned32 >= context.Operand2.ConstantUnsigned32; break;
case ConditionCode.Greater: compare = context.Operand1.ConstantUnsigned32 > context.Operand2.ConstantUnsigned32; break;
case ConditionCode.LessOrEqual: compare = context.Operand1.ConstantUnsigned32 <= context.Operand2.ConstantUnsigned32; break;
case ConditionCode.Less: compare = context.Operand1.ConstantUnsigned32 < context.Operand2.ConstantUnsigned32; break;
case ConditionCode.UnsignedGreater: compare = context.Operand1.ConstantUnsigned32 > context.Operand2.ConstantUnsigned32; break;
case ConditionCode.UnsignedGreaterOrEqual: compare = context.Operand1.ConstantUnsigned32 >= context.Operand2.ConstantUnsigned32; break;
case ConditionCode.UnsignedLess: compare = context.Operand1.ConstantUnsigned32 < context.Operand2.ConstantUnsigned32; break;
case ConditionCode.UnsignedLessOrEqual: compare = context.Operand1.ConstantUnsigned32 <= context.Operand2.ConstantUnsigned32; break;
}
if (!compare)
{
context.SetInstruction(IRInstruction.Nop);
}
else
{
context.SetInstruction(IRInstruction.Jmp, target);
// rest of instructions in block are never used
context.GotoNext();
while (!context.IsBlockEndInstruction)
{
if (!context.IsEmptyOrNop)
{
context.SetInstruction(IRInstruction.Nop);
}
context.GotoNext();
}
}
TransformContext.RemoveBlockFromPHIInstructions(block, target);
}
public override void Transform(Context context, TransformContext transformContext)
{
var target = context.BranchTargets[0];
var block = context.Block;
var phiBlock = GetOtherBranchTarget(block, target);
context.SetInstruction(IRInstruction.Jmp, target);
RemoveRestOfInstructions(context);
TransformContext.RemoveBlockFromPHIInstructions(block, phiBlock);
}