#define CODEGEN_REGISTERS_H
#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/ADT/DenseMap.h"
#include <string>
#include <vector>
+#include <set>
#include <cstdlib>
namespace llvm {
struct CodeGenRegister {
Record *TheDef;
const std::string &getName() const;
- unsigned DeclaredSpillSize, DeclaredSpillAlignment;
+ unsigned EnumValue;
+ unsigned CostPerUse;
CodeGenRegister(Record *R);
};
Record *TheDef;
std::string Namespace;
std::vector<Record*> Elements;
- std::vector<MVT::ValueType> VTs;
+ std::vector<MVT::SimpleValueType> VTs;
unsigned SpillSize;
unsigned SpillAlignment;
int CopyCost;
- std::vector<Record*> SubRegClasses;
+ // Map SubRegIndex -> RegisterClass
+ DenseMap<Record*,Record*> SubRegClasses;
std::string MethodProtos, MethodBodies;
const std::string &getName() const;
- const std::vector<MVT::ValueType> &getValueTypes() const { return VTs; }
+ const std::vector<MVT::SimpleValueType> &getValueTypes() const {return VTs;}
unsigned getNumValueTypes() const { return VTs.size(); }
-
- MVT::ValueType getValueTypeNum(unsigned VTNum) const {
+
+ MVT::SimpleValueType getValueTypeNum(unsigned VTNum) const {
if (VTNum < VTs.size())
return VTs[VTNum];
assert(0 && "VTNum greater than number of ValueTypes in RegClass!");
abort();
}
+ bool containsRegister(Record *R) const {
+ for (unsigned i = 0, e = Elements.size(); i != e; ++i)
+ if (Elements[i] == R) return true;
+ return false;
+ }
+
+ // Returns true if RC is a strict subclass.
+ // RC is a sub-class of this class if it is a valid replacement for any
+ // instruction operand where a register of this classis required. It must
+ // satisfy these conditions:
+ //
+ // 1. All RC registers are also in this.
+ // 2. The RC spill size must not be smaller than our spill size.
+ // 3. RC spill alignment must be compatible with ours.
+ //
+ bool hasSubClass(const CodeGenRegisterClass *RC) const {
+
+ if (RC->Elements.size() > Elements.size() ||
+ (SpillAlignment && RC->SpillAlignment % SpillAlignment) ||
+ SpillSize > RC->SpillSize)
+ return false;
+
+ std::set<Record*> RegSet;
+ for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
+ Record *Reg = Elements[i];
+ RegSet.insert(Reg);
+ }
+
+ for (unsigned i = 0, e = RC->Elements.size(); i != e; ++i) {
+ Record *Reg = RC->Elements[i];
+ if (!RegSet.count(Reg))
+ return false;
+ }
+
+ return true;
+ }
+
CodeGenRegisterClass(Record *R);
};
}