//===- TableGen.cpp - Top-Level TableGen implementation -------------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
//
// TableGen is a tool which can be used to build up a description of something,
// then invoke one or more "tablegen backends" to emit information about the
#include "Record.h"
#include "Support/CommandLine.h"
#include "Support/Signals.h"
+#include "Support/FileUtilities.h"
#include "CodeEmitterGen.h"
#include "RegisterInfoEmitter.h"
+#include "InstrInfoEmitter.h"
+#include "InstrSelectorEmitter.h"
#include <algorithm>
+#include <cstdio>
#include <fstream>
enum ActionType {
PrintRecords,
GenEmitter,
- GenRegister, GenRegisterHeader,
+ GenRegisterEnums, GenRegister, GenRegisterHeader,
+ GenInstrEnums, GenInstrs, GenInstrSelector,
PrintEnums,
Parse,
};
"Print all records to stdout (default)"),
clEnumValN(GenEmitter, "gen-emitter",
"Generate machine code emitter"),
+ clEnumValN(GenRegisterEnums, "gen-register-enums",
+ "Generate enum values for registers"),
clEnumValN(GenRegister, "gen-register-desc",
"Generate a register info description"),
clEnumValN(GenRegisterHeader, "gen-register-desc-header",
"Generate a register info description header"),
+ clEnumValN(GenInstrEnums, "gen-instr-enums",
+ "Generate enum values for instructions"),
+ clEnumValN(GenInstrs, "gen-instr-desc",
+ "Generate instruction descriptions"),
+ clEnumValN(GenInstrSelector, "gen-instr-selector",
+ "Generate an instruction selector"),
clEnumValN(PrintEnums, "print-enums",
"Print enum values for a class"),
clEnumValN(Parse, "parse",
cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
+
+ cl::opt<std::string>
+ IncludeDir("I", cl::desc("Directory of include files"),
+ cl::value_desc("directory"), cl::init(""));
}
-void ParseFile(const std::string &Filename);
+void ParseFile(const std::string &Filename, const std::string & IncludeDir);
RecordKeeper Records;
}
// ParseMachineCode - Try to split the vector of instructions (which is
-// intentially taken by-copy) in half, narrowing down the possible instructions
-// that we may have found. Eventually, this list will get pared down to zero or
-// one instruction, in which case we have a match or failure.
+// intentionally taken by-copy) in half, narrowing down the possible
+// instructions that we may have found. Eventually, this list will get pared
+// down to zero or one instruction, in which case we have a match or failure.
//
static Record *ParseMachineCode(std::vector<Record*>::iterator InstsB,
std::vector<Record*>::iterator InstsE,
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv);
- ParseFile(InputFilename);
+ ParseFile(InputFilename, IncludeDir);
std::ostream *Out = &std::cout;
if (OutputFilename != "-") {
- Out = new std::ofstream(OutputFilename.c_str());
+ // Output to a .tmp file, because we don't actually want to overwrite the
+ // output file unless the generated file is different or the specified file
+ // does not exist.
+ Out = new std::ofstream((OutputFilename+".tmp").c_str());
if (!Out->good()) {
- std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+ std::cerr << argv[0] << ": error opening " << OutputFilename << ".tmp!\n";
return 1;
}
// Make sure the file gets removed if *gasp* tablegen crashes...
- RemoveFileOnSignal(OutputFilename);
+ RemoveFileOnSignal(OutputFilename+".tmp");
}
try {
switch (Action) {
+ case PrintRecords:
+ *Out << Records; // No argument, dump all contents
+ break;
case Parse:
ParseMachineCode();
break;
case GenEmitter:
CodeEmitterGen(Records).run(*Out);
break;
+
+ case GenRegisterEnums:
+ RegisterInfoEmitter(Records).runEnums(*Out);
+ break;
case GenRegister:
RegisterInfoEmitter(Records).run(*Out);
break;
case GenRegisterHeader:
RegisterInfoEmitter(Records).runHeader(*Out);
break;
- case PrintRecords:
- *Out << Records; // No argument, dump all contents
+
+ case GenInstrEnums:
+ InstrInfoEmitter(Records).runEnums(*Out);
+ break;
+ case GenInstrs:
+ InstrInfoEmitter(Records).run(*Out);
+ break;
+ case GenInstrSelector:
+ InstrSelectorEmitter(Records).run(*Out);
break;
case PrintEnums:
- Record *R = Records.getClass(Class);
- if (R == 0) {
- std::cerr << "Cannot find class '" << Class << "'!\n";
- abort();
- }
-
std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
-
for (unsigned i = 0, e = Recs.size(); i != e; ++i)
*Out << Recs[i] << ", ";
*Out << "\n";
}
} catch (const std::string &Error) {
std::cerr << Error << "\n";
- if (Out != &std::cout) delete Out;
+ if (Out != &std::cout) {
+ delete Out; // Close the file
+ std::remove(OutputFilename.c_str()); // Remove the file, it's broken
+ }
return 1;
}
- if (Out != &std::cout) delete Out;
+ if (Out != &std::cout) {
+ delete Out; // Close the file
+
+ // Now that we have generated the result, check to see if we either don't
+ // have the requested file, or if the requested file is different than the
+ // file we generated. If so, move the generated file over the requested
+ // file. Otherwise, just remove the file we just generated, so 'make'
+ // doesn't try to regenerate tons of dependencies.
+ //
+ MoveFileOverIfUpdated(OutputFilename+".tmp", OutputFilename);
+ }
return 0;
}
projects / oota-llvm.git / blobdiff