Write llvm-tblgen backends as functions instead of sub-classes.
The TableGenBackend base class doesn't do much, and will be removed
completely soon.
Patch by Sean Silva!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158311 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/DFAPacketizerEmitter.cpp b/utils/TableGen/DFAPacketizerEmitter.cpp
index 4abf54e..26ab763 100644
--- a/utils/TableGen/DFAPacketizerEmitter.cpp
+++ b/utils/TableGen/DFAPacketizerEmitter.cpp
@@ -15,14 +15,47 @@
//
//===----------------------------------------------------------------------===//
-#include "llvm/TableGen/Record.h"
#include "CodeGenTarget.h"
-#include "DFAPacketizerEmitter.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/TableGen/Record.h"
+#include "llvm/TableGen/TableGenBackend.h"
#include <list>
-
+#include <map>
+#include <string>
using namespace llvm;
//
+// class DFAPacketizerEmitter: class that generates and prints out the DFA
+// for resource tracking.
+//
+namespace {
+class DFAPacketizerEmitter {
+private:
+ std::string TargetName;
+ //
+ // allInsnClasses is the set of all possible resources consumed by an
+ // InstrStage.
+ //
+ DenseSet<unsigned> allInsnClasses;
+ RecordKeeper &Records;
+
+public:
+ DFAPacketizerEmitter(RecordKeeper &R);
+
+ //
+ // collectAllInsnClasses: Populate allInsnClasses which is a set of units
+ // used in each stage.
+ //
+ void collectAllInsnClasses(const std::string &Name,
+ Record *ItinData,
+ unsigned &NStages,
+ raw_ostream &OS);
+
+ void run(raw_ostream &OS);
+};
+} // End anonymous namespace.
+
+//
//
// State represents the usage of machine resources if the packet contains
// a set of instruction classes.
@@ -266,7 +299,7 @@
int State::currentStateNum = 0;
int Transition::currentTransitionNum = 0;
-DFAGen::DFAGen(RecordKeeper &R):
+DFAPacketizerEmitter::DFAPacketizerEmitter(RecordKeeper &R):
TargetName(CodeGenTarget(R).getName()),
allInsnClasses(), Records(R) {}
@@ -346,7 +379,7 @@
// collectAllInsnClasses - Populate allInsnClasses which is a set of units
// used in each stage.
//
-void DFAGen::collectAllInsnClasses(const std::string &Name,
+void DFAPacketizerEmitter::collectAllInsnClasses(const std::string &Name,
Record *ItinData,
unsigned &NStages,
raw_ostream &OS) {
@@ -402,8 +435,7 @@
//
// Run the worklist algorithm to generate the DFA.
//
-void DFAGen::run(raw_ostream &OS) {
- EmitSourceFileHeader("Target DFA Packetizer Tables", OS);
+void DFAPacketizerEmitter::run(raw_ostream &OS) {
// Collect processor iteraries.
std::vector<Record*> ProcItinList =
@@ -510,3 +542,12 @@
// Print out the table.
D.writeTableAndAPI(OS, TargetName);
}
+
+namespace llvm {
+
+void EmitDFAPacketizer(RecordKeeper &RK, raw_ostream &OS) {
+ emitSourceFileHeader("Target DFA Packetizer Tables", OS);
+ DFAPacketizerEmitter(RK).run(OS);
+}
+
+} // End llvm namespace