Initial checkin of useful wrappers around the Target classes, for now, only ValueType and
Target are wrapped
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7665 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
new file mode 100644
index 0000000..4987aeb
--- /dev/null
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -0,0 +1,66 @@
+//===- 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");
+}