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C++: Recurse through 'LogicalNotInstruction' in 'getConstantValue'.

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Mathias Vorreiter Pedersen
2023-11-23 16:31:57 +00:00
parent 98bf748e64
commit cc261bfabb
1 changed files with 23 additions and 23 deletions
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46
cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/constant/ConstantAnalysis.qll
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@@ -12,6 +12,9 @@ int getConstantValue(Instruction instr) {
or or
result = getConstantValue(instr.(CopyInstruction).getSourceValue()) result = getConstantValue(instr.(CopyInstruction).getSourceValue())
or or
getConstantValue(instr.(LogicalNotInstruction).getUnary()) != 0 and
result = 0
or
exists(PhiInstruction phi | exists(PhiInstruction phi |
phi = instr and phi = instr and
result = unique(Operand op | op = phi.getAnInputOperand() | getConstantValue(op.getDef())) result = unique(Operand op | op = phi.getAnInputOperand() | getConstantValue(op.getDef()))
@@ -26,28 +29,25 @@ private predicate binaryInstructionOperands(BinaryInstruction instr, int left, i
pragma[noinline] pragma[noinline]
private int getBinaryInstructionValue(BinaryInstruction instr) { private int getBinaryInstructionValue(BinaryInstruction instr) {
exists(int left, int right | exists(int left, int right | binaryInstructionOperands(instr, left, right) |
binaryInstructionOperands(instr, left, right) and instr instanceof AddInstruction and result = add(left, right)
( or
instr instanceof AddInstruction and result = add(left, right) instr instanceof SubInstruction and result = sub(left, right)
or or
instr instanceof SubInstruction and result = sub(left, right) instr instanceof MulInstruction and result = mul(left, right)
or or
instr instanceof MulInstruction and result = mul(left, right) instr instanceof DivInstruction and result = div(left, right)
or or
instr instanceof DivInstruction and result = div(left, right) instr instanceof CompareEQInstruction and result = compareEQ(left, right)
or or
instr instanceof CompareEQInstruction and result = compareEQ(left, right) instr instanceof CompareNEInstruction and result = compareNE(left, right)
or or
instr instanceof CompareNEInstruction and result = compareNE(left, right) instr instanceof CompareLTInstruction and result = compareLT(left, right)
or or
instr instanceof CompareLTInstruction and result = compareLT(left, right) instr instanceof CompareGTInstruction and result = compareGT(left, right)
or or
instr instanceof CompareGTInstruction and result = compareGT(left, right) instr instanceof CompareLEInstruction and result = compareLE(left, right)
or or
instr instanceof CompareLEInstruction and result = compareLE(left, right) instr instanceof CompareGEInstruction and result = compareGE(left, right)
or
instr instanceof CompareGEInstruction and result = compareGE(left, right)
)
) )
} }