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Initial checkin of useful wrappers around the Target classes, for now, only ValueType and

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Target are wrapped


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7665 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2003-08-07 05:38:11 +00:00
parent 1a737c8366
commit 4587207967
6 changed files with 354 additions and 0 deletions
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utils/TableGen/CodeGenTarget.cpp
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//===- CodeGenWrappers.cpp - Code Generation Class Wrappers -----*- C++ -*-===//
//
// These classes wrap target description classes used by the various code
// generation TableGen backends. 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.
//
//===----------------------------------------------------------------------===//
#include "CodeGenWrappers.h"
#include "Record.h"
/// getValueType - Return the MCV::ValueType that the specified TableGen record
/// corresponds to.
MVT::ValueType getValueType(Record *Rec) {
return (MVT::ValueType)Rec->getValueAsInt("Value");
}
std::ostream &operator<<(std::ostream &OS, MVT::ValueType T) {
switch (T) {
case MVT::Other: return OS << "UNKNOWN";
case MVT::i1: return OS << "i1";
case MVT::i8: return OS << "i8";
case MVT::i16: return OS << "i16";
case MVT::i32: return OS << "i32";
case MVT::i64: return OS << "i64";
case MVT::i128: return OS << "i128";
case MVT::f32: return OS << "f32";
case MVT::f64: return OS << "f64";
case MVT::f80: return OS << "f80";
case MVT::f128: return OS << "f128";
case MVT::isVoid:return OS << "void";
}
return OS;
}
/// getTarget - Return the current instance of the Target class.
///
CodeGenTarget::CodeGenTarget() {
std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
if (Targets.size() != 1)
throw std::string("ERROR: Multiple subclasses of Target defined!");
TargetRec = Targets[0];
// Read in all of the CalleeSavedRegisters...
ListInit *LI = TargetRec->getValueAsListInit("CalleeSavedRegisters");
for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
if (DefInit *DI = dynamic_cast<DefInit*>(LI->getElement(i)))
CalleeSavedRegisters.push_back(DI->getDef());
else
throw "Target: " + TargetRec->getName() +
" expected register definition in CalleeSavedRegisters list!";
PointerType = getValueType(TargetRec->getValueAsDef("PointerType"));
}
const std::string &CodeGenTarget::getName() const {
return TargetRec->getName();
}
Record *CodeGenTarget::getInstructionSet() const {
return TargetRec->getValueAsDef("InstructionSet");
}