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Add constants to analysis of hiding extension casts

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This commit is contained in:
caheckman 2020-02-20 14:42:40 -05:00
parent 36aebc2d9b
commit f28c377e9b
4 changed files with 64 additions and 58 deletions
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11
Ghidra/Features/Decompiler/src/decompile/cpp/cast.hh
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@ -88,6 +88,16 @@ public:
/// \return \b true if a cast is required before extending
virtual bool checkIntPromotionForExtension(const PcodeOp *op) const=0;
/// \brief Is the given ZEXT/SEXT cast implied by the expression its in?
///
/// We've already determined that the given ZEXT or SEXT op can be viewed as a natural \e cast operation.
/// Determine if the cast is implied by the expression its and doesn't need to be printed.
/// \param op is the given ZEXT or SEXT PcodeOp
/// \param readOp is the PcodeOp consuming the output of the extensions (or null)
/// \return \b true if the op as a cast does not need to be printed
virtual bool isExtensionCastImplied(const PcodeOp *op,const PcodeOp *readOp) const=0;
/// \brief Does there need to be a visible cast between the given data-types
///
/// The cast is from a \e current data-type to an \e expected data-type. NULL is returned
@ -151,6 +161,7 @@ public:
virtual int4 intPromotionType(const Varnode *vn) const;
virtual bool checkIntPromotionForCompare(const PcodeOp *op,int4 slot) const;
virtual bool checkIntPromotionForExtension(const PcodeOp *op) const;
virtual bool isExtensionCastImplied(const PcodeOp *op,const PcodeOp *readOp) const;
virtual Datatype *castStandard(Datatype *reqtype,Datatype *curtype,bool care_uint_int,bool care_ptr_uint) const;
virtual Datatype *arithmeticOutputStandard(const PcodeOp *op);
virtual bool isSubpieceCast(Datatype *outtype,Datatype *intype,uint4 offset) const;