It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenTarget.h b/utils/TableGen/CodeGenTarget.h
new file mode 100644
index 0000000..7f5f0a7
--- /dev/null
+++ b/utils/TableGen/CodeGenTarget.h
@@ -0,0 +1,180 @@
+//===- CodeGenTarget.h - Target Class Wrapper -------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines wrappers for the Target class and related global
+// functionality. This makes it easier to access the data and provides a single
+// place that needs to check it for validity. All of these classes throw
+// exceptions on error conditions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_TARGET_H
+#define CODEGEN_TARGET_H
+
+#include "CodeGenRegisters.h"
+#include "CodeGenInstruction.h"
+#include <iosfwd>
+#include <map>
+
+namespace llvm {
+
+class Record;
+class RecordKeeper;
+struct CodeGenRegister;
+class CodeGenTarget;
+
+// SelectionDAG node properties.
+enum SDNP { SDNPCommutative, SDNPAssociative, SDNPHasChain,
+ SDNPOutFlag, SDNPInFlag, SDNPOptInFlag };
+
+/// getValueType - Return the MVT::ValueType that the specified TableGen record
+/// corresponds to.
+MVT::ValueType getValueType(Record *Rec);
+
+std::string getName(MVT::ValueType T);
+std::string getEnumName(MVT::ValueType T);
+
+
+/// CodeGenTarget - This class corresponds to the Target class in the .td files.
+///
+class CodeGenTarget {
+ Record *TargetRec;
+
+ mutable std::map<std::string, CodeGenInstruction> Instructions;
+ mutable std::vector<CodeGenRegister> Registers;
+ mutable std::vector<CodeGenRegisterClass> RegisterClasses;
+ mutable std::vector<MVT::ValueType> LegalValueTypes;
+ void ReadRegisters() const;
+ void ReadRegisterClasses() const;
+ void ReadInstructions() const;
+ void ReadLegalValueTypes() const;
+public:
+ CodeGenTarget();
+
+ Record *getTargetRecord() const { return TargetRec; }
+ const std::string &getName() const;
+
+ /// getInstructionSet - Return the InstructionSet object.
+ ///
+ Record *getInstructionSet() const;
+
+ /// getAsmWriter - Return the AssemblyWriter definition for this target.
+ ///
+ Record *getAsmWriter() const;
+
+ const std::vector<CodeGenRegister> &getRegisters() const {
+ if (Registers.empty()) ReadRegisters();
+ return Registers;
+ }
+
+ const std::vector<CodeGenRegisterClass> &getRegisterClasses() const {
+ if (RegisterClasses.empty()) ReadRegisterClasses();
+ return RegisterClasses;
+ }
+
+ const CodeGenRegisterClass &getRegisterClass(Record *R) const {
+ const std::vector<CodeGenRegisterClass> &RC = getRegisterClasses();
+ for (unsigned i = 0, e = RC.size(); i != e; ++i)
+ if (RC[i].TheDef == R)
+ return RC[i];
+ assert(0 && "Didn't find the register class");
+ abort();
+ }
+
+ /// getRegisterClassForRegister - Find the register class that contains the
+ /// specified physical register. If there register exists in multiple
+ /// register classes or is not in a register class, return null.
+ const CodeGenRegisterClass *getRegisterClassForRegister(Record *R) const {
+ const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
+ const CodeGenRegisterClass *FoundRC = 0;
+ for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
+ const CodeGenRegisterClass &RC = RegisterClasses[i];
+ for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
+ if (R == RC.Elements[ei]) {
+ if (FoundRC) return 0; // In multiple RC's
+ FoundRC = &RC;
+ break;
+ }
+ }
+ }
+ return FoundRC;
+ }
+
+ /// getRegisterVTs - Find the union of all possible ValueTypes for the
+ /// specified physical register.
+ std::vector<unsigned char> getRegisterVTs(Record *R) const;
+
+ const std::vector<MVT::ValueType> &getLegalValueTypes() const {
+ if (LegalValueTypes.empty()) ReadLegalValueTypes();
+ return LegalValueTypes;
+ }
+
+ /// isLegalValueType - Return true if the specified value type is natively
+ /// supported by the target (i.e. there are registers that directly hold it).
+ bool isLegalValueType(MVT::ValueType VT) const {
+ const std::vector<MVT::ValueType> &LegalVTs = getLegalValueTypes();
+ for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
+ if (LegalVTs[i] == VT) return true;
+ return false;
+ }
+
+ /// getInstructions - Return all of the instructions defined for this target.
+ ///
+ const std::map<std::string, CodeGenInstruction> &getInstructions() const {
+ if (Instructions.empty()) ReadInstructions();
+ return Instructions;
+ }
+
+ CodeGenInstruction &getInstruction(const std::string &Name) const {
+ const std::map<std::string, CodeGenInstruction> &Insts = getInstructions();
+ assert(Insts.count(Name) && "Not an instruction!");
+ return const_cast<CodeGenInstruction&>(Insts.find(Name)->second);
+ }
+
+ typedef std::map<std::string,
+ CodeGenInstruction>::const_iterator inst_iterator;
+ inst_iterator inst_begin() const { return getInstructions().begin(); }
+ inst_iterator inst_end() const { return Instructions.end(); }
+
+ /// getInstructionsByEnumValue - Return all of the instructions defined by the
+ /// target, ordered by their enum value.
+ void getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
+ &NumberedInstructions);
+
+
+ /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
+ ///
+ bool isLittleEndianEncoding() const;
+};
+
+/// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern
+/// tablegen class in TargetSelectionDAG.td
+class ComplexPattern {
+ MVT::ValueType Ty;
+ unsigned NumOperands;
+ std::string SelectFunc;
+ std::vector<Record*> RootNodes;
+ unsigned Properties;
+public:
+ ComplexPattern() : NumOperands(0) {};
+ ComplexPattern(Record *R);
+
+ MVT::ValueType getValueType() const { return Ty; }
+ unsigned getNumOperands() const { return NumOperands; }
+ const std::string &getSelectFunc() const { return SelectFunc; }
+ const std::vector<Record*> &getRootNodes() const {
+ return RootNodes;
+ }
+ bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
+
+};
+
+} // End llvm namespace
+
+#endif