@Override
public DfaInstructionState[] visitPush(
PushInstruction instruction, DataFlowRunner runner, DfaMemoryState memState) {
if (instruction.isReferenceRead()) {
DfaValue dfaValue = instruction.getValue();
if (dfaValue instanceof DfaVariableValue) {
DfaConstValue constValue = memState.getConstantValue((DfaVariableValue) dfaValue);
myPossibleVariableValues.putValue(
instruction,
constValue != null
&& (constValue.getValue() == null || constValue.getValue() instanceof Boolean)
? constValue
: ANY_VALUE);
}
}
return super.visitPush(instruction, runner, memState);
}
@Nullable
private static DfaInstructionState[] checkComparingWithConstant(
BinopInstruction instruction,
DataFlowRunner runner,
DfaMemoryState memState,
DfaVariableValue var,
IElementType opSign,
double comparedWith) {
DfaConstValue knownConstantValue = memState.getConstantValue(var);
Object knownValue = knownConstantValue == null ? null : knownConstantValue.getValue();
if (knownValue instanceof Number) {
double knownDouble = ((Number) knownValue).doubleValue();
return checkComparisonWithKnownRange(
instruction, runner, memState, opSign, comparedWith, knownDouble, knownDouble);
}
PsiType varType = var.getVariableType();
if (!(varType instanceof PsiPrimitiveType)) return null;
if (varType == PsiType.FLOAT || varType == PsiType.DOUBLE) return null;
double minValue =
varType == PsiType.BYTE
? Byte.MIN_VALUE
: varType == PsiType.SHORT
? Short.MIN_VALUE
: varType == PsiType.INT
? Integer.MIN_VALUE
: varType == PsiType.CHAR ? Character.MIN_VALUE : Long.MIN_VALUE;
double maxValue =
varType == PsiType.BYTE
? Byte.MAX_VALUE
: varType == PsiType.SHORT
? Short.MAX_VALUE
: varType == PsiType.INT
? Integer.MAX_VALUE
: varType == PsiType.CHAR ? Character.MAX_VALUE : Long.MAX_VALUE;
return checkComparisonWithKnownRange(
instruction, runner, memState, opSign, comparedWith, minValue, maxValue);
}