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tblgen: Move mini Type hierarchy to LLVM-style RTTI. 

llvm-svn: 165648
This commit is contained in:
Sean Silva 2012-10-10 20:24:49 +00:00
parent 88eb8dd4ed
commit c0a9e39d0a
1 changed files with 22 additions and 4 deletions
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26
llvm/utils/TableGen/TGValueTypes.cpp
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@ -15,13 +15,25 @@
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/Support/Casting.h"
#include <map>
using namespace llvm;
namespace llvm {
class Type {
protected:
enum TypeKind {
TK_ExtendedIntegerType,
TK_ExtendedVectorType
};
private:
TypeKind Kind;
public:
TypeKind getKind() const {
return Kind;
}
Type(TypeKind K) : Kind(K) {}
virtual unsigned getSizeInBits() const = 0;
virtual ~Type() {}
};
@ -32,7 +44,10 @@ class ExtendedIntegerType : public Type {
unsigned BitWidth;
public:
explicit ExtendedIntegerType(unsigned bits)
: BitWidth(bits) {}
: Type(TK_ExtendedIntegerType), BitWidth(bits) {}
static bool classof(const Type *T) {
return T->getKind() == TK_ExtendedIntegerType;
};
unsigned getSizeInBits() const {
return getBitWidth();
}
@ -46,7 +61,10 @@ class ExtendedVectorType : public Type {
unsigned NumElements;
public:
ExtendedVectorType(EVT elty, unsigned num)
: ElementType(elty), NumElements(num) {}
: Type(TK_ExtendedVectorType), ElementType(elty), NumElements(num) {}
static bool classof(const Type *T) {
return T->getKind() == TK_ExtendedVectorType;
};
unsigned getSizeInBits() const {
return getNumElements() * getElementType().getSizeInBits();
}
@ -71,12 +89,12 @@ bool EVT::isExtendedFloatingPoint() const {
bool EVT::isExtendedInteger() const {
assert(isExtended() && "Type is not extended!");
return dynamic_cast<const ExtendedIntegerType *>(LLVMTy) != 0;
return isa<ExtendedIntegerType>(LLVMTy);
}
bool EVT::isExtendedVector() const {
assert(isExtended() && "Type is not extended!");
return dynamic_cast<const ExtendedVectorType *>(LLVMTy) != 0;
return isa<ExtendedVectorType>(LLVMTy);
}
bool EVT::isExtended64BitVector() const {