diff options
Diffstat (limited to 'include/llvm/IR/Attributes.h')
| -rw-r--r-- | include/llvm/IR/Attributes.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/llvm/IR/Attributes.h b/include/llvm/IR/Attributes.h index 443892b..d0d1b5e 100644 --- a/include/llvm/IR/Attributes.h +++ b/include/llvm/IR/Attributes.h @@ -89,6 +89,7 @@ public: ///< often, so lazy binding isn't worthwhile NonNull, ///< Pointer is known to be not null Dereferenceable, ///< Pointer is known to be dereferenceable + DereferenceableOrNull, ///< Pointer is either null or dereferenceable NoRedZone, ///< Disable redzone NoReturn, ///< Mark the function as not returning NoUnwind, ///< Function doesn't unwind stack @@ -136,6 +137,8 @@ public: static Attribute getWithStackAlignment(LLVMContext &Context, uint64_t Align); static Attribute getWithDereferenceableBytes(LLVMContext &Context, uint64_t Bytes); + static Attribute getWithDereferenceableOrNullBytes(LLVMContext &Context, + uint64_t Bytes); //===--------------------------------------------------------------------===// // Attribute Accessors @@ -185,6 +188,10 @@ public: /// dereferenceable attribute (or zero if unknown). uint64_t getDereferenceableBytes() const; + /// \brief Returns the number of dereferenceable_or_null bytes from the + /// dereferenceable_or_null attribute (or zero if unknown). + uint64_t getDereferenceableOrNullBytes() const; + /// \brief The Attribute is converted to a string of equivalent mnemonic. This /// is, presumably, for writing out the mnemonics for the assembly writer. std::string getAsString(bool InAttrGrp = false) const; @@ -287,6 +294,12 @@ public: AttributeSet addDereferenceableAttr(LLVMContext &C, unsigned Index, uint64_t Bytes) const; + /// \brief Add the dereferenceable_or_null attribute to the attribute set at + /// the given index. Since attribute sets are immutable, this returns a new + /// set. + AttributeSet addDereferenceableOrNullAttr(LLVMContext &C, unsigned Index, + uint64_t Bytes) const; + //===--------------------------------------------------------------------===// // AttributeSet Accessors //===--------------------------------------------------------------------===// @@ -331,6 +344,10 @@ public: /// \brief Get the number of dereferenceable bytes (or zero if unknown). uint64_t getDereferenceableBytes(unsigned Index) const; + /// \brief Get the number of dereferenceable_or_null bytes (or zero if + /// unknown). + uint64_t getDereferenceableOrNullBytes(unsigned Index) const; + /// \brief Return the attributes at the index as a string. std::string getAsString(unsigned Index, bool InAttrGrp = false) const; @@ -411,6 +428,7 @@ class AttrBuilder { uint64_t Alignment; uint64_t StackAlignment; uint64_t DerefBytes; + uint64_t DerefOrNullBytes; public: AttrBuilder() : Attrs(0), Alignment(0), StackAlignment(0), DerefBytes(0) {} explicit AttrBuilder(uint64_t Val) @@ -476,6 +494,10 @@ public: /// attribute exists (zero is returned otherwise). uint64_t getDereferenceableBytes() const { return DerefBytes; } + /// \brief Retrieve the number of dereferenceable_or_null bytes, if the + /// dereferenceable_or_null attribute exists (zero is returned otherwise). + uint64_t getDereferenceableOrNullBytes() const { return DerefOrNullBytes; } + /// \brief This turns an int alignment (which must be a power of 2) into the /// form used internally in Attribute. AttrBuilder &addAlignmentAttr(unsigned Align); @@ -488,6 +510,10 @@ public: /// internally in Attribute. AttrBuilder &addDereferenceableAttr(uint64_t Bytes); + /// \brief This turns the number of dereferenceable_or_null bytes into the + /// form used internally in Attribute. + AttrBuilder &addDereferenceableOrNullAttr(uint64_t Bytes); + /// \brief Return true if the builder contains no target-independent /// attributes. bool empty() const { return Attrs.none(); } |