diff options
Diffstat (limited to 'include/llvm/Target/TargetData.h')
| -rw-r--r-- | include/llvm/Target/TargetData.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetData.h b/include/llvm/Target/TargetData.h index 315bee96ba..26fd1870ac 100644 --- a/include/llvm/Target/TargetData.h +++ b/include/llvm/Target/TargetData.h @@ -44,6 +44,7 @@ enum AlignTypeEnum { AGGREGATE_ALIGN = 'a', ///< Aggregate alignment STACK_ALIGN = 's' ///< Stack objects alignment }; + /// Target alignment element. /// /// Stores the alignment data associated with a given alignment type (pointer, @@ -64,12 +65,19 @@ struct TargetAlignElem { bool operator==(const TargetAlignElem &rhs) const; }; +/// TargetData - This class holds a parsed version of the target data layout +/// string in a module and provides methods for querying it. The target data +/// layout string is specified *by the target* - a frontend generating LLVM IR +/// is required to generate the right target data for the target being codegen'd +/// to. If some measure of portability is desired, an empty string may be +/// specified in the module. class TargetData : public ImmutablePass { private: bool LittleEndian; ///< Defaults to false unsigned PointerMemSize; ///< Pointer size in bytes unsigned PointerABIAlign; ///< Pointer ABI alignment unsigned PointerPrefAlign; ///< Pointer preferred alignment + unsigned StackNaturalAlign; ///< Stack natural alignment SmallVector<unsigned char, 8> LegalIntWidths; ///< Legal Integers. @@ -163,6 +171,11 @@ public: return !isLegalInteger(Width); } + /// Returns true if the given alignment exceeds the natural stack alignment. + bool exceedsNaturalStackAlignment(unsigned Align) const { + return (StackNaturalAlign != 0) && (Align > StackNaturalAlign); + } + /// fitsInLegalInteger - This function returns true if the specified type fits /// in a native integer type supported by the CPU. For example, if the CPU /// only supports i32 as a native integer type, then i27 fits in a legal |