//===- 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
// description in some predefined format. In practice, this is used by the LLVM
//===----------------------------------------------------------------------===//
#include "Record.h"
-#include "Support/CommandLine.h"
-#include "Support/Signals.h"
-#include "Support/FileUtilities.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/System/Signals.h"
+#include "llvm/Support/FileUtilities.h"
#include "CodeEmitterGen.h"
#include "RegisterInfoEmitter.h"
#include "InstrInfoEmitter.h"
-#include "InstrSelectorEmitter.h"
+#include "AsmWriterEmitter.h"
+#include "DAGISelEmitter.h"
+#include "SubtargetEmitter.h"
+#include "IntrinsicEmitter.h"
#include <algorithm>
#include <cstdio>
#include <fstream>
+#include <ios>
+using namespace llvm;
enum ActionType {
PrintRecords,
GenEmitter,
GenRegisterEnums, GenRegister, GenRegisterHeader,
- GenInstrEnums, GenInstrs, GenInstrSelector,
- PrintEnums,
- Parse,
+ GenInstrEnums, GenInstrs, GenAsmWriter,
+ GenDAGISel,
+ GenSubtarget,
+ GenIntrinsic,
+ PrintEnums
};
namespace {
"Generate enum values for instructions"),
clEnumValN(GenInstrs, "gen-instr-desc",
"Generate instruction descriptions"),
- clEnumValN(GenInstrSelector, "gen-instr-selector",
- "Generate an instruction selector"),
+ clEnumValN(GenAsmWriter, "gen-asm-writer",
+ "Generate assembly writer"),
+ clEnumValN(GenDAGISel, "gen-dag-isel",
+ "Generate a DAG instruction selector"),
+ clEnumValN(GenSubtarget, "gen-subtarget",
+ "Generate subtarget enumerations"),
+ clEnumValN(GenIntrinsic, "gen-intrinsic",
+ "Generate intrinsic information"),
clEnumValN(PrintEnums, "print-enums",
"Print enum values for a class"),
- clEnumValN(Parse, "parse",
- "Interpret machine code (testing only)"),
- 0));
+ clEnumValEnd));
cl::opt<std::string>
Class("class", cl::desc("Print Enum list for this class"),
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, const std::string & IncludeDir);
-
-RecordKeeper Records;
-
-static Init *getBit(Record *R, unsigned BitNo) {
- const std::vector<RecordVal> &V = R->getValues();
- for (unsigned i = 0, e = V.size(); i != e; ++i)
- if (V[i].getPrefix()) {
- assert(dynamic_cast<BitsInit*>(V[i].getValue()) &&
- "Can only handle fields of bits<> type!");
- BitsInit *I = (BitsInit*)V[i].getValue();
- if (BitNo < I->getNumBits())
- return I->getBit(BitNo);
- BitNo -= I->getNumBits();
- }
-
- std::cerr << "Cannot find requested bit!\n";
- abort();
- return 0;
-}
-
-static unsigned getNumBits(Record *R) {
- const std::vector<RecordVal> &V = R->getValues();
- unsigned Num = 0;
- for (unsigned i = 0, e = V.size(); i != e; ++i)
- if (V[i].getPrefix()) {
- assert(dynamic_cast<BitsInit*>(V[i].getValue()) &&
- "Can only handle fields of bits<> type!");
- Num += ((BitsInit*)V[i].getValue())->getNumBits();
- }
- return Num;
-}
-
-static bool BitsAreFixed(Record *I1, Record *I2, unsigned BitNo) {
- return dynamic_cast<BitInit*>(getBit(I1, BitNo)) &&
- dynamic_cast<BitInit*>(getBit(I2, BitNo));
-}
-
-static bool BitsAreEqual(Record *I1, Record *I2, unsigned BitNo) {
- BitInit *Bit1 = dynamic_cast<BitInit*>(getBit(I1, BitNo));
- BitInit *Bit2 = dynamic_cast<BitInit*>(getBit(I2, BitNo));
-
- return Bit1 && Bit2 && Bit1->getValue() == Bit2->getValue();
-}
-
-static bool BitRangesEqual(Record *I1, Record *I2,
- unsigned Start, unsigned End) {
- for (unsigned i = Start; i != End; ++i)
- if (!BitsAreEqual(I1, I2, i))
- return false;
- return true;
-}
-
-static unsigned getFirstFixedBit(Record *R, unsigned FirstFixedBit) {
- // Look for the first bit of the pair that are required to be 0 or 1.
- while (!dynamic_cast<BitInit*>(getBit(R, FirstFixedBit)))
- ++FirstFixedBit;
- return FirstFixedBit;
-}
-
-static void FindInstDifferences(Record *I1, Record *I2,
- unsigned FirstFixedBit, unsigned MaxBits,
- unsigned &FirstVaryingBitOverall,
- unsigned &LastFixedBitOverall) {
- // Compare the first instruction to the rest of the instructions, looking for
- // fields that differ.
- //
- unsigned FirstVaryingBit = FirstFixedBit;
- while (FirstVaryingBit < MaxBits && BitsAreEqual(I1, I2, FirstVaryingBit))
- ++FirstVaryingBit;
-
- unsigned LastFixedBit = FirstVaryingBit;
- while (LastFixedBit < MaxBits && BitsAreFixed(I1, I2, LastFixedBit))
- ++LastFixedBit;
-
- if (FirstVaryingBit < FirstVaryingBitOverall)
- FirstVaryingBitOverall = FirstVaryingBit;
- if (LastFixedBit < LastFixedBitOverall)
- LastFixedBitOverall = LastFixedBit;
-}
-
-static bool getBitValue(Record *R, unsigned BitNo) {
- Init *I = getBit(R, BitNo);
- assert(dynamic_cast<BitInit*>(I) && "Bit should be fixed!");
- return ((BitInit*)I)->getValue();
-}
-
-struct BitComparator {
- unsigned BitBegin, BitEnd;
- BitComparator(unsigned B, unsigned E) : BitBegin(B), BitEnd(E) {}
-
- bool operator()(Record *R1, Record *R2) { // Return true if R1 is less than R2
- for (unsigned i = BitBegin; i != BitEnd; ++i) {
- bool V1 = getBitValue(R1, i), V2 = getBitValue(R2, i);
- if (V1 < V2)
- return true;
- else if (V2 < V1)
- return false;
- }
- return false;
- }
-};
-
-static void PrintRange(std::vector<Record*>::iterator I,
- std::vector<Record*>::iterator E) {
- while (I != E) std::cerr << **I++;
-}
-
-static bool getMemoryBit(unsigned char *M, unsigned i) {
- return (M[i/8] & (1 << (i&7))) != 0;
-}
-
-static unsigned getFirstFixedBitInSequence(std::vector<Record*>::iterator IB,
- std::vector<Record*>::iterator IE,
- unsigned StartBit) {
- unsigned FirstFixedBit = 0;
- for (std::vector<Record*>::iterator I = IB; I != IE; ++I)
- FirstFixedBit = std::max(FirstFixedBit, getFirstFixedBit(*I, StartBit));
- return FirstFixedBit;
-}
-
-// ParseMachineCode - Try to split the vector of instructions (which is
-// 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,
- unsigned char *M) {
- assert(InstsB != InstsE && "Empty range?");
- if (InstsB+1 == InstsE) {
- // Only a single instruction, see if we match it...
- Record *Inst = *InstsB;
- for (unsigned i = 0, e = getNumBits(Inst); i != e; ++i)
- if (BitInit *BI = dynamic_cast<BitInit*>(getBit(Inst, i)))
- if (getMemoryBit(M, i) != BI->getValue())
- throw std::string("Parse failed!\n");
- return Inst;
- }
-
- unsigned MaxBits = ~0;
- for (std::vector<Record*>::iterator I = InstsB; I != InstsE; ++I)
- MaxBits = std::min(MaxBits, getNumBits(*I));
-
- unsigned FirstFixedBit = getFirstFixedBitInSequence(InstsB, InstsE, 0);
- unsigned FirstVaryingBit, LastFixedBit;
- do {
- FirstVaryingBit = ~0;
- LastFixedBit = ~0;
- for (std::vector<Record*>::iterator I = InstsB+1; I != InstsE; ++I)
- FindInstDifferences(*InstsB, *I, FirstFixedBit, MaxBits,
- FirstVaryingBit, LastFixedBit);
- if (FirstVaryingBit == MaxBits) {
- std::cerr << "ERROR: Could not find bit to distinguish between "
- << "the following entries!\n";
- PrintRange(InstsB, InstsE);
- }
-
-#if 0
- std::cerr << "FVB: " << FirstVaryingBit << " - " << LastFixedBit
- << ": " << InstsE-InstsB << "\n";
-#endif
-
- FirstFixedBit = getFirstFixedBitInSequence(InstsB, InstsE, FirstVaryingBit);
- } while (FirstVaryingBit != FirstFixedBit);
-
- //std::cerr << "\n\nXXXXXXXXXXXXXXXXX\n\n";
- //PrintRange(InstsB, InstsE);
-
- // Sort the Insts list so that the entries have all of the bits in the range
- // [FirstVaryingBit,LastFixedBit) sorted. These bits are all guaranteed to be
- // set to either 0 or 1 (BitInit values), which simplifies things.
- //
- std::sort(InstsB, InstsE, BitComparator(FirstVaryingBit, LastFixedBit));
-
- // Once the list is sorted by these bits, split the bit list into smaller
- // lists, and recurse on each one.
- //
- std::vector<Record*>::iterator RangeBegin = InstsB;
- Record *Match = 0;
- while (RangeBegin != InstsE) {
- std::vector<Record*>::iterator RangeEnd = RangeBegin+1;
- while (RangeEnd != InstsE &&
- BitRangesEqual(*RangeBegin, *RangeEnd, FirstVaryingBit, LastFixedBit))
- ++RangeEnd;
-
- // We just identified a range of equal instructions. If this range is the
- // input range, we were not able to distinguish between the instructions in
- // the set. Print an error and exit!
- //
- if (RangeBegin == InstsB && RangeEnd == InstsE) {
- std::cerr << "Error: Could not distinguish among the following insts!:\n";
- PrintRange(InstsB, InstsE);
- abort();
- }
-
-#if 0
- std::cerr << "FVB: " << FirstVaryingBit << " - " << LastFixedBit
- << ": [" << RangeEnd-RangeBegin << "] - ";
- for (int i = LastFixedBit-1; i >= (int)FirstVaryingBit; --i)
- std::cerr << (int)((BitInit*)getBit(*RangeBegin, i))->getValue() << " ";
- std::cerr << "\n";
-#endif
-
- if (Record *R = ParseMachineCode(RangeBegin, RangeEnd, M)) {
- if (Match) {
- std::cerr << "Error: Multiple matches found:\n";
- PrintRange(InstsB, InstsE);
- }
-
- assert(Match == 0 && "Multiple matches??");
- Match = R;
- }
- RangeBegin = RangeEnd;
- }
-
- return Match;
-}
-
-static void PrintValue(Record *I, unsigned char *Ptr, const RecordVal &Val) {
- assert(dynamic_cast<BitsInit*>(Val.getValue()) &&
- "Can only handle undefined bits<> types!");
- BitsInit *BI = (BitsInit*)Val.getValue();
- assert(BI->getNumBits() <= 32 && "Can only handle fields up to 32 bits!");
-
- unsigned Value = 0;
- const std::vector<RecordVal> &Vals = I->getValues();
-
- // Start by filling in fixed values...
- for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
- if (BitInit *B = dynamic_cast<BitInit*>(BI->getBit(i)))
- Value |= B->getValue() << i;
-
- // Loop over all of the fields in the instruction adding in any
- // contributions to this value (due to bit references).
- //
- unsigned Offset = 0;
- for (unsigned f = 0, e = Vals.size(); f != e; ++f)
- if (Vals[f].getPrefix()) {
- BitsInit *FieldInitializer = (BitsInit*)Vals[f].getValue();
- if (&Vals[f] == &Val) {
- // Read the bits directly now...
- for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
- Value |= getMemoryBit(Ptr, Offset+i) << i;
- break;
- }
-
- // Scan through the field looking for bit initializers of the current
- // variable...
- for (unsigned i = 0, e = FieldInitializer->getNumBits(); i != e; ++i)
- if (VarBitInit *VBI =
- dynamic_cast<VarBitInit*>(FieldInitializer->getBit(i))) {
- TypedInit *TI = VBI->getVariable();
- if (VarInit *VI = dynamic_cast<VarInit*>(TI)) {
- if (VI->getName() == Val.getName())
- Value |= getMemoryBit(Ptr, Offset+i) << VBI->getBitNum();
- } else if (FieldInit *FI = dynamic_cast<FieldInit*>(TI)) {
- // FIXME: implement this!
- std::cerr << "FIELD INIT not implemented yet!\n";
- }
- }
- Offset += FieldInitializer->getNumBits();
- }
-
- std::cout << "0x" << std::hex << Value << std::dec;
+ cl::list<std::string>
+ IncludeDirs("I", cl::desc("Directory of include files"),
+ cl::value_desc("directory"), cl::Prefix);
}
-static void PrintInstruction(Record *I, unsigned char *Ptr) {
- std::cout << "Inst " << getNumBits(I)/8 << " bytes: "
- << "\t" << I->getName() << "\t" << *I->getValue("Name")->getValue()
- << "\t";
-
- const std::vector<RecordVal> &Vals = I->getValues();
- for (unsigned i = 0, e = Vals.size(); i != e; ++i)
- if (!Vals[i].getValue()->isComplete()) {
- std::cout << Vals[i].getName() << "=";
- PrintValue(I, Ptr, Vals[i]);
- std::cout << "\t";
- }
-
- std::cout << "\n";// << *I;
-}
-
-static void ParseMachineCode() {
- // X86 code
- unsigned char Buffer[] = {
- 0x55, // push EBP
- 0x89, 0xE5, // mov EBP, ESP
- //0x83, 0xEC, 0x08, // sub ESP, 0x8
- 0xE8, 1, 2, 3, 4, // call +0x04030201
- 0x89, 0xEC, // mov ESP, EBP
- 0x5D, // pop EBP
- 0xC3, // ret
- 0x90, // nop
- 0xC9, // leave
- 0x89, 0xF6, // mov ESI, ESI
- 0x68, 1, 2, 3, 4, // push 0x04030201
- 0x5e, // pop ESI
- 0xFF, 0xD0, // call EAX
- 0xB8, 1, 2, 3, 4, // mov EAX, 0x04030201
- 0x85, 0xC0, // test EAX, EAX
- 0xF4, // hlt
- };
-
-#if 0
- // SparcV9 code
- unsigned char Buffer[] = { 0xbf, 0xe0, 0x20, 0x1f, 0x1, 0x0, 0x0, 0x1,
- 0x0, 0x0, 0x0, 0x0, 0xc1, 0x0, 0x20, 0x1, 0x1,
- 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
- 0x0, 0x0, 0x0, 0x0, 0x0, 0x40, 0x0, 0x0, 0x0, 0x1,
- 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
- 0x0, 0x0, 0xaf, 0xe8, 0x20, 0x17
- };
-#endif
-
- std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
-
- unsigned char *BuffPtr = Buffer;
- while (1) {
- Record *R = ParseMachineCode(Insts.begin(), Insts.end(), BuffPtr);
- PrintInstruction(R, BuffPtr);
-
- unsigned Bits = getNumBits(R);
- assert((Bits & 7) == 0 && "Instruction is not an even number of bytes!");
- BuffPtr += Bits/8;
- }
+namespace llvm {
+ void ParseFile(const std::string &Filename,
+ const std::vector<std::string> &IncludeDirs);
}
+RecordKeeper llvm::Records;
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv);
- ParseFile(InputFilename, IncludeDir);
+ ParseFile(InputFilename, IncludeDirs);
- std::ostream *Out = &std::cout;
+ std::ostream *Out = cout.stream();
if (OutputFilename != "-") {
- // 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());
+ Out = new std::ofstream(OutputFilename.c_str());
if (!Out->good()) {
- std::cerr << argv[0] << ": error opening " << OutputFilename << ".tmp!\n";
+ cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
return 1;
}
// Make sure the file gets removed if *gasp* tablegen crashes...
- RemoveFileOnSignal(OutputFilename+".tmp");
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
try {
case PrintRecords:
*Out << Records; // No argument, dump all contents
break;
- case Parse:
- ParseMachineCode();
- break;
case GenEmitter:
CodeEmitterGen(Records).run(*Out);
break;
case GenInstrs:
InstrInfoEmitter(Records).run(*Out);
break;
- case GenInstrSelector:
- InstrSelectorEmitter(Records).run(*Out);
+
+ case GenAsmWriter:
+ AsmWriterEmitter(Records).run(*Out);
+ break;
+
+ case GenDAGISel:
+ DAGISelEmitter(Records).run(*Out);
+ break;
+ case GenSubtarget:
+ SubtargetEmitter(Records).run(*Out);
+ break;
+ case GenIntrinsic:
+ IntrinsicEmitter(Records).run(*Out);
break;
case PrintEnums:
+ {
std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);
for (unsigned i = 0, e = Recs.size(); i != e; ++i)
- *Out << Recs[i] << ", ";
+ *Out << Recs[i]->getName() << ", ";
*Out << "\n";
break;
}
+ default:
+ assert(1 && "Invalid Action");
+ return 1;
+ }
} catch (const std::string &Error) {
- std::cerr << Error << "\n";
- if (Out != &std::cout) {
+ cerr << argv[0] << ": " << Error << "\n";
+ if (Out != cout.stream()) {
delete Out; // Close the file
std::remove(OutputFilename.c_str()); // Remove the file, it's broken
}
return 1;
+ } catch (...) {
+ cerr << argv[0] << ": Unknown unexpected exception occurred.\n";
+ if (Out != cout.stream()) {
+ delete Out; // Close the file
+ std::remove(OutputFilename.c_str()); // Remove the file, it's broken
+ }
+ return 2;
}
- if (Out != &std::cout) {
+ if (Out != cout.stream()) {
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