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35 lines
1.7 KiB
Plaintext
35 lines
1.7 KiB
Plaintext
import default
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import semmle.code.cpp.ir.implementation.unaliased_ssa.internal.AliasAnalysis as RawAA
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import semmle.code.cpp.ir.implementation.raw.IR as Raw
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import semmle.code.cpp.ir.implementation.aliased_ssa.internal.AliasAnalysis as UnAA
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import semmle.code.cpp.ir.implementation.unaliased_ssa.IR as Un
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import semmle.code.cpp.ir.implementation.unaliased_ssa.internal.SSAConstruction
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from Raw::Instruction rawInstr, Un::Instruction unInstr, string rawPointsTo, string unPointsTo
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where
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rawInstr = getOldInstruction(unInstr) and
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not rawInstr instanceof Raw::VariableAddressInstruction and
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(
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exists(Variable var, int rawBitOffset, int unBitOffset |
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RawAA::resultPointsTo(rawInstr, Raw::getIRUserVariable(_, var), rawBitOffset) and
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rawPointsTo = var.toString() + RawAA::getBitOffsetString(rawBitOffset) and
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UnAA::resultPointsTo(unInstr, Un::getIRUserVariable(_, var), unBitOffset) and
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unPointsTo = var.toString() + UnAA::getBitOffsetString(unBitOffset)
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)
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or
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exists(Variable var, int unBitOffset |
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not RawAA::resultPointsTo(rawInstr, Raw::getIRUserVariable(_, var), _) and
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rawPointsTo = "none" and
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UnAA::resultPointsTo(unInstr, Un::getIRUserVariable(_, var), unBitOffset) and
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unPointsTo = var.toString() + UnAA::getBitOffsetString(unBitOffset)
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)
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or
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exists(Variable var, int rawBitOffset |
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RawAA::resultPointsTo(rawInstr, Raw::getIRUserVariable(_, var), rawBitOffset) and
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rawPointsTo = var.toString() + RawAA::getBitOffsetString(rawBitOffset) and
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not UnAA::resultPointsTo(unInstr, Un::getIRUserVariable(_, var), _) and
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unPointsTo = "none"
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)
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)
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select rawInstr.getLocation().toString(), rawInstr.getOperationString(), rawPointsTo, unPointsTo
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