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Move SetTheory from utils/TableGen into lib/TableGen so Clang can use it.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211100 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy
2014-06-17 13:10:38 +00:00
parent fc6e030047
commit 3b2a256332
7 changed files with 5 additions and 5 deletions
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1
utils/TableGen/CMakeLists.txt
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@@ -26,7 +26,6 @@ add_tablegen(llvm-tblgen LLVM
OptParserEmitter.cpp
PseudoLoweringEmitter.cpp
RegisterInfoEmitter.cpp
SetTheory.cpp
SubtargetEmitter.cpp
TableGen.cpp
X86DisassemblerTables.cpp

2
utils/TableGen/CodeGenRegisters.h
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@@ -15,7 +15,6 @@
#ifndef CODEGEN_REGISTERS_H
#define CODEGEN_REGISTERS_H
#include "SetTheory.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/DenseMap.h"
@@ -23,6 +22,7 @@
#include "llvm/CodeGen/MachineValueType.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/SetTheory.h"
#include <cstdlib>
#include <map>
#include <set>

2
utils/TableGen/CodeGenSchedule.h
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@@ -15,11 +15,11 @@
#ifndef CODEGEN_SCHEDULE_H
#define CODEGEN_SCHEDULE_H
#include "SetTheory.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/SetTheory.h"
namespace llvm {

323
utils/TableGen/SetTheory.cpp
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@@ -1,323 +0,0 @@
//===- SetTheory.cpp - Generate ordered sets from DAG expressions ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the SetTheory class that computes ordered sets of
// Records from DAG expressions.
//
//===----------------------------------------------------------------------===//
#include "SetTheory.h"
#include "llvm/Support/Format.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
using namespace llvm;
// Define the standard operators.
namespace {
typedef SetTheory::RecSet RecSet;
typedef SetTheory::RecVec RecVec;
// (add a, b, ...) Evaluate and union all arguments.
struct AddOp : public SetTheory::Operator {
void apply(SetTheory &ST, DagInit *Expr, RecSet &Elts,
ArrayRef<SMLoc> Loc) override {
ST.evaluate(Expr->arg_begin(), Expr->arg_end(), Elts, Loc);
}
};
// (sub Add, Sub, ...) Set difference.
struct SubOp : public SetTheory::Operator {
void apply(SetTheory &ST, DagInit *Expr, RecSet &Elts,
ArrayRef<SMLoc> Loc) override {
if (Expr->arg_size() < 2)
PrintFatalError(Loc, "Set difference needs at least two arguments: " +
Expr->getAsString());
RecSet Add, Sub;
ST.evaluate(*Expr->arg_begin(), Add, Loc);
ST.evaluate(Expr->arg_begin() + 1, Expr->arg_end(), Sub, Loc);
for (RecSet::iterator I = Add.begin(), E = Add.end(); I != E; ++I)
if (!Sub.count(*I))
Elts.insert(*I);
}
};
// (and S1, S2) Set intersection.
struct AndOp : public SetTheory::Operator {
void apply(SetTheory &ST, DagInit *Expr, RecSet &Elts,
ArrayRef<SMLoc> Loc) override {
if (Expr->arg_size() != 2)
PrintFatalError(Loc, "Set intersection requires two arguments: " +
Expr->getAsString());
RecSet S1, S2;
ST.evaluate(Expr->arg_begin()[0], S1, Loc);
ST.evaluate(Expr->arg_begin()[1], S2, Loc);
for (RecSet::iterator I = S1.begin(), E = S1.end(); I != E; ++I)
if (S2.count(*I))
Elts.insert(*I);
}
};
// SetIntBinOp - Abstract base class for (Op S, N) operators.
struct SetIntBinOp : public SetTheory::Operator {
virtual void apply2(SetTheory &ST, DagInit *Expr, RecSet &Set, int64_t N,
RecSet &Elts, ArrayRef<SMLoc> Loc) = 0;
void apply(SetTheory &ST, DagInit *Expr, RecSet &Elts,
ArrayRef<SMLoc> Loc) override {
if (Expr->arg_size() != 2)
PrintFatalError(Loc, "Operator requires (Op Set, Int) arguments: " +
Expr->getAsString());
RecSet Set;
ST.evaluate(Expr->arg_begin()[0], Set, Loc);
IntInit *II = dyn_cast<IntInit>(Expr->arg_begin()[1]);
if (!II)
PrintFatalError(Loc, "Second argument must be an integer: " +
Expr->getAsString());
apply2(ST, Expr, Set, II->getValue(), Elts, Loc);
}
};
// (shl S, N) Shift left, remove the first N elements.
struct ShlOp : public SetIntBinOp {
void apply2(SetTheory &ST, DagInit *Expr, RecSet &Set, int64_t N,
RecSet &Elts, ArrayRef<SMLoc> Loc) override {
if (N < 0)
PrintFatalError(Loc, "Positive shift required: " +
Expr->getAsString());
if (unsigned(N) < Set.size())
Elts.insert(Set.begin() + N, Set.end());
}
};
// (trunc S, N) Truncate after the first N elements.
struct TruncOp : public SetIntBinOp {
void apply2(SetTheory &ST, DagInit *Expr, RecSet &Set, int64_t N,
RecSet &Elts, ArrayRef<SMLoc> Loc) override {
if (N < 0)
PrintFatalError(Loc, "Positive length required: " +
Expr->getAsString());
if (unsigned(N) > Set.size())
N = Set.size();
Elts.insert(Set.begin(), Set.begin() + N);
}
};
// Left/right rotation.
struct RotOp : public SetIntBinOp {
const bool Reverse;
RotOp(bool Rev) : Reverse(Rev) {}
void apply2(SetTheory &ST, DagInit *Expr, RecSet &Set, int64_t N,
RecSet &Elts, ArrayRef<SMLoc> Loc) override {
if (Reverse)
N = -N;
// N > 0 -> rotate left, N < 0 -> rotate right.
if (Set.empty())
return;
if (N < 0)
N = Set.size() - (-N % Set.size());
else
N %= Set.size();
Elts.insert(Set.begin() + N, Set.end());
Elts.insert(Set.begin(), Set.begin() + N);
}
};
// (decimate S, N) Pick every N'th element of S.
struct DecimateOp : public SetIntBinOp {
void apply2(SetTheory &ST, DagInit *Expr, RecSet &Set, int64_t N,
RecSet &Elts, ArrayRef<SMLoc> Loc) override {
if (N <= 0)
PrintFatalError(Loc, "Positive stride required: " +
Expr->getAsString());
for (unsigned I = 0; I < Set.size(); I += N)
Elts.insert(Set[I]);
}
};
// (interleave S1, S2, ...) Interleave elements of the arguments.
struct InterleaveOp : public SetTheory::Operator {
void apply(SetTheory &ST, DagInit *Expr, RecSet &Elts,
ArrayRef<SMLoc> Loc) override {
// Evaluate the arguments individually.
SmallVector<RecSet, 4> Args(Expr->getNumArgs());
unsigned MaxSize = 0;
for (unsigned i = 0, e = Expr->getNumArgs(); i != e; ++i) {
ST.evaluate(Expr->getArg(i), Args[i], Loc);
MaxSize = std::max(MaxSize, unsigned(Args[i].size()));
}
// Interleave arguments into Elts.
for (unsigned n = 0; n != MaxSize; ++n)
for (unsigned i = 0, e = Expr->getNumArgs(); i != e; ++i)
if (n < Args[i].size())
Elts.insert(Args[i][n]);
}
};
// (sequence "Format", From, To) Generate a sequence of records by name.
struct SequenceOp : public SetTheory::Operator {
void apply(SetTheory &ST, DagInit *Expr, RecSet &Elts,
ArrayRef<SMLoc> Loc) override {
int Step = 1;
if (Expr->arg_size() > 4)
PrintFatalError(Loc, "Bad args to (sequence \"Format\", From, To): " +
Expr->getAsString());
else if (Expr->arg_size() == 4) {
if (IntInit *II = dyn_cast<IntInit>(Expr->arg_begin()[3])) {
Step = II->getValue();
} else
PrintFatalError(Loc, "Stride must be an integer: " +
Expr->getAsString());
}
std::string Format;
if (StringInit *SI = dyn_cast<StringInit>(Expr->arg_begin()[0]))
Format = SI->getValue();
else
PrintFatalError(Loc, "Format must be a string: " + Expr->getAsString());
int64_t From, To;
if (IntInit *II = dyn_cast<IntInit>(Expr->arg_begin()[1]))
From = II->getValue();
else
PrintFatalError(Loc, "From must be an integer: " + Expr->getAsString());
if (From < 0 || From >= (1 << 30))
PrintFatalError(Loc, "From out of range");
if (IntInit *II = dyn_cast<IntInit>(Expr->arg_begin()[2]))
To = II->getValue();
else
PrintFatalError(Loc, "From must be an integer: " + Expr->getAsString());
if (To < 0 || To >= (1 << 30))
PrintFatalError(Loc, "To out of range");
RecordKeeper &Records =
cast<DefInit>(Expr->getOperator())->getDef()->getRecords();
Step *= From <= To ? 1 : -1;
while (true) {
if (Step > 0 && From > To)
break;
else if (Step < 0 && From < To)
break;
std::string Name;
raw_string_ostream OS(Name);
OS << format(Format.c_str(), unsigned(From));
Record *Rec = Records.getDef(OS.str());
if (!Rec)
PrintFatalError(Loc, "No def named '" + Name + "': " +
Expr->getAsString());
// Try to reevaluate Rec in case it is a set.
if (const RecVec *Result = ST.expand(Rec))
Elts.insert(Result->begin(), Result->end());
else
Elts.insert(Rec);
From += Step;
}
}
};
// Expand a Def into a set by evaluating one of its fields.
struct FieldExpander : public SetTheory::Expander {
StringRef FieldName;
FieldExpander(StringRef fn) : FieldName(fn) {}
void expand(SetTheory &ST, Record *Def, RecSet &Elts) override {
ST.evaluate(Def->getValueInit(FieldName), Elts, Def->getLoc());
}
};
} // end anonymous namespace
// Pin the vtables to this file.
void SetTheory::Operator::anchor() {}
void SetTheory::Expander::anchor() {}
SetTheory::SetTheory() {
addOperator("add", new AddOp);
addOperator("sub", new SubOp);
addOperator("and", new AndOp);
addOperator("shl", new ShlOp);
addOperator("trunc", new TruncOp);
addOperator("rotl", new RotOp(false));
addOperator("rotr", new RotOp(true));
addOperator("decimate", new DecimateOp);
addOperator("interleave", new InterleaveOp);
addOperator("sequence", new SequenceOp);
}
void SetTheory::addOperator(StringRef Name, Operator *Op) {
Operators[Name] = Op;
}
void SetTheory::addExpander(StringRef ClassName, Expander *E) {
Expanders[ClassName] = E;
}
void SetTheory::addFieldExpander(StringRef ClassName, StringRef FieldName) {
addExpander(ClassName, new FieldExpander(FieldName));
}
void SetTheory::evaluate(Init *Expr, RecSet &Elts, ArrayRef<SMLoc> Loc) {
// A def in a list can be a just an element, or it may expand.
if (DefInit *Def = dyn_cast<DefInit>(Expr)) {
if (const RecVec *Result = expand(Def->getDef()))
return Elts.insert(Result->begin(), Result->end());
Elts.insert(Def->getDef());
return;
}
// Lists simply expand.
if (ListInit *LI = dyn_cast<ListInit>(Expr))
return evaluate(LI->begin(), LI->end(), Elts, Loc);
// Anything else must be a DAG.
DagInit *DagExpr = dyn_cast<DagInit>(Expr);
if (!DagExpr)
PrintFatalError(Loc, "Invalid set element: " + Expr->getAsString());
DefInit *OpInit = dyn_cast<DefInit>(DagExpr->getOperator());
if (!OpInit)
PrintFatalError(Loc, "Bad set expression: " + Expr->getAsString());
Operator *Op = Operators.lookup(OpInit->getDef()->getName());
if (!Op)
PrintFatalError(Loc, "Unknown set operator: " + Expr->getAsString());
Op->apply(*this, DagExpr, Elts, Loc);
}
const RecVec *SetTheory::expand(Record *Set) {
// Check existing entries for Set and return early.
ExpandMap::iterator I = Expansions.find(Set);
if (I != Expansions.end())
return &I->second;
// This is the first time we see Set. Find a suitable expander.
const std::vector<Record*> &SC = Set->getSuperClasses();
for (unsigned i = 0, e = SC.size(); i != e; ++i) {
// Skip unnamed superclasses.
if (!dyn_cast<StringInit>(SC[i]->getNameInit()))
continue;
if (Expander *Exp = Expanders.lookup(SC[i]->getName())) {
// This breaks recursive definitions.
RecVec &EltVec = Expansions[Set];
RecSet Elts;
Exp->expand(*this, Set, Elts);
EltVec.assign(Elts.begin(), Elts.end());
return &EltVec;
}
}
// Set is not expandable.
return nullptr;
}

142
utils/TableGen/SetTheory.h
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@@ -1,142 +0,0 @@
//===- SetTheory.h - Generate ordered sets from DAG expressions -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the SetTheory class that computes ordered sets of
// Records from DAG expressions. Operators for standard set operations are
// predefined, and it is possible to add special purpose set operators as well.
//
// The user may define named sets as Records of predefined classes. Set
// expanders can be added to a SetTheory instance to teach it how to find the
// elements of such a named set.
//
// These are the predefined operators. The argument lists can be individual
// elements (defs), other sets (defs of expandable classes), lists, or DAG
// expressions that are evaluated recursively.
//
// - (add S1, S2 ...) Union sets. This is also how sets are created from element
// lists.
//
// - (sub S1, S2, ...) Set difference. Every element in S1 except for the
// elements in S2, ...
//
// - (and S1, S2) Set intersection. Every element in S1 that is also in S2.
//
// - (shl S, N) Shift left. Remove the first N elements from S.
//
// - (trunc S, N) Truncate. The first N elements of S.
//
// - (rotl S, N) Rotate left. Same as (add (shl S, N), (trunc S, N)).
//
// - (rotr S, N) Rotate right.
//
// - (decimate S, N) Decimate S by picking every N'th element, starting with
// the first one. For instance, (decimate S, 2) returns the even elements of
// S.
//
// - (sequence "Format", From, To) Generate a sequence of defs with printf.
// For instance, (sequence "R%u", 0, 3) -> [ R0, R1, R2, R3 ]
//
//===----------------------------------------------------------------------===//
#ifndef SETTHEORY_H
#define SETTHEORY_H
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/SourceMgr.h"
#include <map>
#include <vector>
namespace llvm {
class DagInit;
class Init;
class Record;
class RecordKeeper;
class SetTheory {
public:
typedef std::vector<Record*> RecVec;
typedef SmallSetVector<Record*, 16> RecSet;
/// Operator - A callback representing a DAG operator.
class Operator {
virtual void anchor();
public:
virtual ~Operator() {}
/// apply - Apply this operator to Expr's arguments and insert the result
/// in Elts.
virtual void apply(SetTheory&, DagInit *Expr, RecSet &Elts,
ArrayRef<SMLoc> Loc) =0;
};
/// Expander - A callback function that can transform a Record representing a
/// set into a fully expanded list of elements. Expanders provide a way for
/// users to define named sets that can be used in DAG expressions.
class Expander {
virtual void anchor();
public:
virtual ~Expander() {}
virtual void expand(SetTheory&, Record*, RecSet &Elts) =0;
};
private:
// Map set defs to their fully expanded contents. This serves as a memoization
// cache and it makes it possible to return const references on queries.
typedef std::map<Record*, RecVec> ExpandMap;
ExpandMap Expansions;
// Known DAG operators by name.
StringMap<Operator*> Operators;
// Typed expanders by class name.
StringMap<Expander*> Expanders;
public:
/// Create a SetTheory instance with only the standard operators.
SetTheory();
/// addExpander - Add an expander for Records with the named super class.
void addExpander(StringRef ClassName, Expander*);
/// addFieldExpander - Add an expander for ClassName that simply evaluates
/// FieldName in the Record to get the set elements. That is all that is
/// needed for a class like:
///
/// class Set<dag d> {
/// dag Elts = d;
/// }
///
void addFieldExpander(StringRef ClassName, StringRef FieldName);
/// addOperator - Add a DAG operator.
void addOperator(StringRef Name, Operator*);
/// evaluate - Evaluate Expr and append the resulting set to Elts.
void evaluate(Init *Expr, RecSet &Elts, ArrayRef<SMLoc> Loc);
/// evaluate - Evaluate a sequence of Inits and append to Elts.
template<typename Iter>
void evaluate(Iter begin, Iter end, RecSet &Elts, ArrayRef<SMLoc> Loc) {
while (begin != end)
evaluate(*begin++, Elts, Loc);
}
/// expand - Expand a record into a set of elements if possible. Return a
/// pointer to the expanded elements, or NULL if Set cannot be expanded
/// further.
const RecVec *expand(Record *Set);
};
} // end namespace llvm
#endif

2
utils/TableGen/TableGen.cpp
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@@ -12,13 +12,13 @@
//===----------------------------------------------------------------------===//
#include "TableGenBackends.h" // Declares all backends.
#include "SetTheory.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Main.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/SetTheory.h"
using namespace llvm;