/// before emitting the constant pool for a function.
const char *ConstantPoolSection; // Defaults to "\t.section .rodata\n"
+ /// JumpTableSection - This is the section that we SwitchToSection right
+ /// before emitting the jump tables for a function.
+ const char *JumpTableSection; // Defaults to "\t.section .rodata\n"
+
/// StaticCtorsSection - This is the directive that is emitted to switch to
/// a section to emit the static constructor list.
/// Defaults to "\t.section .ctors,\"aw\",@progbits".
///
void EmitConstantPool(MachineConstantPool *MCP);
+ /// EmitJumpTableInfo - Print assembly representations of the jump tables
+ /// used by the current function to the current output stream.
+ ///
+ void EmitJumpTableInfo(MachineJumpTableInfo *MJTI);
+
/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
/// special global used by LLVM. If so, emit it and return true, otherwise
/// do nothing and return false.
/// printInlineAsm - This method formats and prints the specified machine
/// instruction that is an inline asm.
void printInlineAsm(const MachineInstr *MI) const;
+
+ /// printBasicBlockLabel - This method prints the label for the specified
+ /// MachineBasicBlock
+ virtual void printBasicBlockLabel(const MachineBasicBlock *MBB) const;
+
private:
void EmitXXStructorList(Constant *List);
#define LLVM_CODEGEN_MACHINECODEEMITTER_H
#include "llvm/Support/DataTypes.h"
+#include <map>
namespace llvm {
class MachineBasicBlock;
class MachineConstantPool;
+class MachineJumpTableInfo;
class MachineFunction;
class MachineRelocation;
class Value;
/// for the function.
virtual void emitConstantPool(MachineConstantPool *MCP) {}
+ /// initJumpTableInfo - This callback is invoked by the JIT to allocate the
+ /// necessary memory to hold the jump tables.
+ virtual void initJumpTableInfo(MachineJumpTableInfo *MJTI) {}
+
+ /// emitJumpTableInfo - This callback is invoked to output the jump tables
+ /// for the function. In addition to a pointer to the MachineJumpTableInfo,
+ /// this function also takes a map of MBBs to addresses, so that the final
+ /// addresses of the MBBs can be written to the jump tables.
+ virtual void emitJumpTableInfo(MachineJumpTableInfo *MJTI,
+ std::map<MachineBasicBlock*,uint64_t> &MBBM) {}
+
/// startFunctionStub - This callback is invoked when the JIT needs the
/// address of a function that has not been code generated yet. The StubSize
/// specifies the total size required by the stub. Stubs are not allowed to
//
virtual uint64_t getConstantPoolEntryAddress(unsigned Index) = 0;
+ // getJumpTablelEntryAddress - Return the address of the jump table with index
+ // 'Index' in the function that last called initJumpTableInfo.
+ //
+ virtual uint64_t getJumpTableEntryAddress(unsigned Index) = 0;
+
// allocateGlobal - Allocate some space for a global variable.
virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment) = 0;
class SSARegMap;
class MachineFrameInfo;
class MachineConstantPool;
+class MachineJumpTableInfo;
// ilist_traits
template <>
// Keep track of constants which are spilled to memory
MachineConstantPool *ConstantPool;
+
+ // Keep track of jump tables for switch instructions
+ MachineJumpTableInfo *JumpTableInfo;
// Function-level unique numbering for MachineBasicBlocks. When a
// MachineBasicBlock is inserted into a MachineFunction is it automatically
///
MachineFrameInfo *getFrameInfo() const { return FrameInfo; }
+ /// getJumpTableInfo - Return the jump table info object for the current
+ /// function. This object contains information about jump tables for switch
+ /// instructions in the current function.
+ ///
+ MachineJumpTableInfo *getJumpTableInfo() const { return JumpTableInfo; }
+
/// getConstantPool - Return the constant pool object for the current
/// function.
///
MO_MachineBasicBlock, // MachineBasicBlock reference
MO_FrameIndex, // Abstract Stack Frame Index
MO_ConstantPoolIndex, // Address of indexed Constant in Constant Pool
+ MO_JumpTableIndex, // Address of indexed Jump Table for switch
MO_ExternalSymbol, // Name of external global symbol
MO_GlobalAddress // Address of a global value
};
}
bool isFrameIndex() const { return opType == MO_FrameIndex; }
bool isConstantPoolIndex() const { return opType == MO_ConstantPoolIndex; }
+ bool isJumpTableIndex() const { return opType == MO_JumpTableIndex; }
bool isGlobalAddress() const { return opType == MO_GlobalAddress; }
bool isExternalSymbol() const { return opType == MO_ExternalSymbol; }
assert(isConstantPoolIndex() && "Wrong MachineOperand accessor");
return (unsigned)contents.immedVal;
}
+ unsigned getJumpTableIndex() const {
+ assert(isJumpTableIndex() && "Wrong MachineOperand accessor");
+ return (unsigned)contents.immedVal;
+ }
GlobalValue *getGlobal() const {
assert(isGlobalAddress() && "Wrong MachineOperand accessor");
return (GlobalValue*)contents.value;
}
void setOffset(int Offset) {
- assert((isGlobalAddress() || isExternalSymbol() || isConstantPoolIndex()) &&
+ assert((isGlobalAddress() || isExternalSymbol() || isConstantPoolIndex() ||
+ isJumpTableIndex()) &&
"Wrong MachineOperand accessor");
extra.offset = Offset;
}
operands.push_back(MachineOperand(I, MachineOperand::MO_ConstantPoolIndex));
}
+ /// addJumpTableIndexOperand - Add a jump table object index to the
+ /// instruction.
+ ///
+ void addJumpTableIndexOperand(unsigned I) {
+ assert(!OperandsComplete() &&
+ "Trying to add an operand to a machine instr that is already done!");
+ operands.push_back(MachineOperand(I, MachineOperand::MO_JumpTableIndex));
+ }
+
void addGlobalAddressOperand(GlobalValue *GV, bool isPCRelative, int Offset) {
assert(!OperandsComplete() &&
"Trying to add an operand to a machine instr that is already done!");
--- /dev/null
+//===-- CodeGen/MachineJumpTableInfo.h - Abstract Jump Tables --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Nate Begeman and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// The MachineJumpTableInfo class keeps track of jump tables referenced by
+// lowered switch instructions in the MachineFunction.
+//
+// Instructions reference the address of these jump tables through the use of
+// MO_JumpTableIndex values. When emitting assembly or machine code, these
+// virtual address references are converted to refer to the address of the
+// function jump tables.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_MACHINEJUMPTABLEINFO_H
+#define LLVM_CODEGEN_MACHINEJUMPTABLEINFO_H
+
+#include "llvm/Target/TargetData.h"
+#include <vector>
+#include <iosfwd>
+
+namespace llvm {
+
+class MachineBasicBlock;
+
+/// MachineJumpTableEntry - One jump table in the jump table info.
+///
+struct MachineJumpTableEntry {
+ /// MBBs - The vector of basic blocks from which to create the jump table.
+ std::vector<MachineBasicBlock*> MBBs;
+
+ MachineJumpTableEntry(std::vector<MachineBasicBlock*> &M) : MBBs(M) {}
+};
+
+class MachineJumpTableInfo {
+ const TargetData &TD;
+ std::vector<MachineJumpTableEntry> JumpTables;
+public:
+ MachineJumpTableInfo(const TargetData &td) : TD(td) {}
+
+ /// getJumpTableIndex - Create a new jump table or return an existing one.
+ ///
+ unsigned getJumpTableIndex(std::vector<MachineBasicBlock*> &DestBBs);
+
+ /// isEmpty - Return true if there are no jump tables.
+ ///
+ bool isEmpty() const { return JumpTables.empty(); }
+
+ const std::vector<MachineJumpTableEntry> &getJumpTables() const {
+ return JumpTables;
+ }
+
+ unsigned getEntrySize() const { return TD.getPointerSize(); }
+ unsigned getAlignment() const { return TD.getPointerAlignment(); }
+
+ /// print - Used by the MachineFunction printer to print information about
+ /// jump tables. Implemented in MachineFunction.cpp
+ ///
+ void print(std::ostream &OS) const;
+
+ /// dump - Call print(std::cerr) to be called from the debugger.
+ ///
+ void dump() const;
+};
+
+} // End llvm namespace
+
+#endif
if (isa<BasicBlockSDNode>(Node)) return true;
if (isa<FrameIndexSDNode>(Node)) return true;
if (isa<ConstantPoolSDNode>(Node)) return true;
+ if (isa<JumpTableSDNode>(Node)) return true;
if (isa<ExternalSymbolSDNode>(Node)) return true;
return false;
}
int offset = 0);
SDOperand getFrameIndex(int FI, MVT::ValueType VT);
SDOperand getTargetFrameIndex(int FI, MVT::ValueType VT);
+ SDOperand getJumpTable(int JTI, MVT::ValueType VT);
+ SDOperand getTargetJumpTable(int JTI, MVT::ValueType VT);
SDOperand getConstantPool(Constant *C, MVT::ValueType VT,
unsigned Alignment=0, int offset = 0);
SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT,
std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants;
std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstantFPs;
- std::map<int, SDNode*> FrameIndices, TargetFrameIndices;
+ std::map<int, SDNode*> FrameIndices, TargetFrameIndices, JumpTableIndices,
+ TargetJumpTableIndices;
std::map<std::pair<Constant *,
std::pair<int, unsigned> >, SDNode*> ConstantPoolIndices;
std::map<std::pair<Constant *,
#include "llvm/Pass.h"
#include "llvm/Constant.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
+#include <set>
namespace llvm {
class SelectionDAG;
SelectionDAG *CurDAG;
MachineBasicBlock *BB;
- SelectionDAGISel(TargetLowering &tli) : TLI(tli) {}
+ SelectionDAGISel(TargetLowering &tli) : TLI(tli), JT(0,0,0) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
// ThisBB - the blcok into which to emit the code for the setcc and branches
MachineBasicBlock *ThisBB;
};
+ struct JumpTable {
+ JumpTable(unsigned R, unsigned J, MachineBasicBlock *me) : Reg(R), JTI(J),
+ MBB(me) {}
+ // Reg - the virtual register containing the index of the jump table entry
+ // to jump to.
+ unsigned Reg;
+ // JTI - the JumpTableIndex for this jump table in the function.
+ unsigned JTI;
+ // MBB - the MBB into which to emit the code for the indirect jump.
+ MachineBasicBlock *MBB;
+ // SuccMBBs - a vector of unique successor MBBs used for updating CFG info
+ // and PHI nodes.
+ std::set<MachineBasicBlock*> SuccMBBs;
+ };
protected:
/// Pick a safe ordering and emit instructions for each target node in the
/// SwitchCases - Vector of CaseBlock structures used to communicate
/// SwitchInst code generation information.
std::vector<CaseBlock> SwitchCases;
+
+ /// JT - Record which holds necessary information for emitting a jump table
+ JumpTable JT;
};
}
// Various leaf nodes.
STRING, BasicBlock, VALUETYPE, CONDCODE, Register,
Constant, ConstantFP,
- GlobalAddress, FrameIndex, ConstantPool, ExternalSymbol,
+ GlobalAddress, FrameIndex, JumpTable, ConstantPool, ExternalSymbol,
// TargetConstant* - Like Constant*, but the DAG does not do any folding or
// simplification of the constant.
// dag, turning into a GlobalAddress operand.
TargetGlobalAddress,
TargetFrameIndex,
+ TargetJumpTable,
TargetConstantPool,
TargetExternalSymbol,
// operand, the second is the MBB to branch to.
BR,
+ // BRIND - Indirect branch. The first operand is the chain, the second
+ // is the value to branch to, which must be of the same type as the target's
+ // pointer type.
+ BRIND,
+
// BRCOND - Conditional branch. The first operand is the chain,
// the second is the condition, the third is the block to branch
// to if the condition is true.
}
};
+class JumpTableSDNode : public SDNode {
+ int JTI;
+protected:
+ friend class SelectionDAG;
+ JumpTableSDNode(int jti, MVT::ValueType VT, bool isTarg)
+ : SDNode(isTarg ? ISD::TargetJumpTable : ISD::JumpTable, VT),
+ JTI(jti) {}
+public:
+
+ int getIndex() const { return JTI; }
+
+ static bool classof(const JumpTableSDNode *) { return true; }
+ static bool classof(const SDNode *N) {
+ return N->getOpcode() == ISD::JumpTable ||
+ N->getOpcode() == ISD::TargetJumpTable;
+ }
+};
+
class ConstantPoolSDNode : public SDNode {
Constant *C;
int Offset;
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetMachine.h"
AlignmentIsInBytes(true),
SwitchToSectionDirective("\t.section\t"),
ConstantPoolSection("\t.section .rodata\n"),
+ JumpTableSection("\t.section .rodata\n"),
StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
LCOMMDirective(0),
}
}
+/// EmitJumpTableInfo - Print assembly representations of the jump tables used
+/// by the current function to the current output stream.
+///
+void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI) {
+ const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
+ if (JT.empty()) return;
+ const TargetData &TD = TM.getTargetData();
+
+ // FIXME: someday we need to handle PIC jump tables
+ assert((TM.getRelocationModel() == Reloc::Static ||
+ TM.getRelocationModel() == Reloc::DynamicNoPIC) &&
+ "Unhandled relocation model emitting jump table information!");
+
+ SwitchSection(JumpTableSection, 0);
+ EmitAlignment(Log2_32(TD.getPointerAlignment()));
+ for (unsigned i = 0, e = JT.size(); i != e; ++i) {
+ O << PrivateGlobalPrefix << "JTI" << getFunctionNumber() << '_' << i
+ << ":\n";
+ const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
+ O << Data32bitsDirective << ' ';
+ printBasicBlockLabel(JTBBs[ii]);
+ O << '\n';
+ }
+ }
+}
+
/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
/// special global used by LLVM. If so, emit it and return true, otherwise
/// do nothing and return false.
// Target doesn't support this yet!
return true;
}
+
+/// printBasicBlockLabel - This method prints the label for the specified
+/// MachineBasicBlock
+void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB) const {
+ O << PrivateGlobalPrefix << "LBB"
+ << Mang->getValueName(MBB->getParent()->getFunction())
+ << "_" << MBB->getNumber() << '\t' << CommentString
+ << MBB->getBasicBlock()->getName();
+}
assert(0 && "CP not implementated yet!");
return 0;
}
-
+ virtual uint64_t getJumpTableEntryAddress(unsigned Index) {
+ assert(0 && "JT not implementated yet!");
+ return 0;
+ }
virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment) {
assert(0 && "Globals not implemented yet!");
return 0;
{ return 0; }
uint64_t getConstantPoolEntryAddress(unsigned Num) { return 0; }
+ uint64_t getJumpTableEntryAddress(unsigned Num) { return 0; }
uint64_t getCurrentPCValue() { return 0; }
uint64_t getCurrentPCOffset() { return 0; }
};
void emitConstantPool(MachineConstantPool *MCP) {
MCE.emitConstantPool(MCP);
}
-
+ void initJumpTableInfo(MachineJumpTableInfo *MJTI) {
+ MCE.initJumpTableInfo(MJTI);
+ }
+ void emitJumpTableInfo(MachineJumpTableInfo *MJTI,
+ std::map<MachineBasicBlock*,uint64_t> &MBBM) {
+ MCE.emitJumpTableInfo(MJTI, MBBM);
+ }
+
void startFunctionStub(unsigned StubSize) {
MCE.startFunctionStub(StubSize);
}
uint64_t getConstantPoolEntryAddress(unsigned Num) {
return MCE.getConstantPoolEntryAddress(Num);
}
-
+ uint64_t getJumpTableEntryAddress(unsigned Num) {
+ return MCE.getJumpTableEntryAddress(Num);
+ }
virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment)
{ return MCE.allocateGlobal(size, alignment); }
#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetFrameInfo.h"
MFInfo = 0;
FrameInfo = new MachineFrameInfo();
ConstantPool = new MachineConstantPool(TM.getTargetData());
+ JumpTableInfo = new MachineJumpTableInfo(TM.getTargetData());
BasicBlocks.Parent = this;
}
delete MFInfo;
delete FrameInfo;
delete ConstantPool;
+ delete JumpTableInfo;
delete[] UsedPhysRegs;
}
// Print Frame Information
getFrameInfo()->print(*this, OS);
+
+ // Print JumpTable Information
+ getJumpTableInfo()->print(OS);
// Print Constant Pool
getConstantPool()->print(OS);
}
+//===----------------------------------------------------------------------===//
+// MachineJumpTableInfo implementation
+//===----------------------------------------------------------------------===//
+
+/// getJumpTableIndex - Create a new jump table entry in the jump table info
+/// or return an existing one.
+///
+unsigned MachineJumpTableInfo::getJumpTableIndex(
+ std::vector<MachineBasicBlock*> &DestBBs) {
+ for (unsigned i = 0, e = JumpTables.size(); i != e; ++i)
+ if (JumpTables[i].MBBs == DestBBs)
+ return i;
+
+ JumpTables.push_back(MachineJumpTableEntry(DestBBs));
+ return JumpTables.size()-1;
+}
+
+
+void MachineJumpTableInfo::print(std::ostream &OS) const {
+ // FIXME: this is lame, maybe we could print out the MBB numbers or something
+ // like {1, 2, 4, 5, 3, 0}
+ for (unsigned i = 0, e = JumpTables.size(); i != e; ++i) {
+ OS << " <jt #" << i << "> has " << JumpTables[i].MBBs.size()
+ << " entries\n";
+ }
+}
+
+void MachineJumpTableInfo::dump() const { print(std::cerr); }
+
+
//===----------------------------------------------------------------------===//
// MachineConstantPool implementation
//===----------------------------------------------------------------------===//
case MachineOperand::MO_ConstantPoolIndex:
OS << "<cp#" << MO.getConstantPoolIndex() << ">";
break;
+ case MachineOperand::MO_JumpTableIndex:
+ OS << "<jt#" << MO.getJumpTableIndex() << ">";
+ break;
case MachineOperand::MO_GlobalAddress:
OS << "<ga:" << ((Value*)MO.getGlobal())->getName();
if (MO.getOffset()) OS << "+" << MO.getOffset();
case MachineOperand::MO_ConstantPoolIndex:
OS << "<cp#" << MO.getConstantPoolIndex() << ">";
break;
+ case MachineOperand::MO_JumpTableIndex:
+ OS << "<jt#" << MO.getJumpTableIndex() << ">";
+ break;
case MachineOperand::MO_GlobalAddress:
OS << "<ga:" << ((Value*)MO.getGlobal())->getName() << ">";
break;
case ISD::Register:
case ISD::BasicBlock:
case ISD::TargetFrameIndex:
+ case ISD::TargetJumpTable:
case ISD::TargetConstant:
case ISD::TargetConstantFP:
case ISD::TargetConstantPool:
abort();
case ISD::GlobalAddress:
case ISD::ExternalSymbol:
- case ISD::ConstantPool: // Nothing to do.
+ case ISD::ConstantPool:
+ case ISD::JumpTable: // Nothing to do.
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
default: assert(0 && "This action is not supported yet!");
case TargetLowering::Custom:
Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
break;
-
+ case ISD::BRIND:
+ Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
+ // Ensure that libcalls are emitted before a branch.
+ Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
+ Tmp1 = LegalizeOp(Tmp1);
+ LastCALLSEQ_END = DAG.getEntryNode();
+
+ switch (getTypeAction(Node->getOperand(1).getValueType())) {
+ default: assert(0 && "Indirect target must be legal type (pointer)!");
+ case Legal:
+ Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the condition.
+ break;
+ }
+ Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
+ break;
case ISD::BRCOND:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
// Ensure that libcalls are emitted before a return.
} else if (FrameIndexSDNode *FI =
dyn_cast<FrameIndexSDNode>(Op)) {
MI->addFrameIndexOperand(FI->getIndex());
+ } else if (JumpTableSDNode *JT =
+ dyn_cast<JumpTableSDNode>(Op)) {
+ MI->addJumpTableIndexOperand(JT->getIndex());
} else if (ConstantPoolSDNode *CP =
dyn_cast<ConstantPoolSDNode>(Op)) {
int Offset = CP->getOffset();
case ISD::TargetFrameIndex:
Erased = TargetFrameIndices.erase(cast<FrameIndexSDNode>(N)->getIndex());
break;
+ case ISD::JumpTable:
+ Erased = JumpTableIndices.erase(cast<JumpTableSDNode>(N)->getIndex());
+ break;
+ case ISD::TargetJumpTable:
+ Erased =
+ TargetJumpTableIndices.erase(cast<JumpTableSDNode>(N)->getIndex());
+ break;
case ISD::ConstantPool:
Erased = ConstantPoolIndices.
erase(std::make_pair(cast<ConstantPoolSDNode>(N)->get(),
return SDOperand(N, 0);
}
+SDOperand SelectionDAG::getJumpTable(int JTI, MVT::ValueType VT) {
+ SDNode *&N = JumpTableIndices[JTI];
+ if (N) return SDOperand(N, 0);
+ N = new JumpTableSDNode(JTI, VT, false);
+ AllNodes.push_back(N);
+ return SDOperand(N, 0);
+}
+
+SDOperand SelectionDAG::getTargetJumpTable(int JTI, MVT::ValueType VT) {
+ SDNode *&N = TargetJumpTableIndices[JTI];
+ if (N) return SDOperand(N, 0);
+ N = new JumpTableSDNode(JTI, VT, true);
+ AllNodes.push_back(N);
+ return SDOperand(N, 0);
+}
+
SDOperand SelectionDAG::getConstantPool(Constant *C, MVT::ValueType VT,
unsigned Alignment, int Offset) {
SDNode *&N = ConstantPoolIndices[std::make_pair(C,
case ISD::ConstantFP: return "ConstantFP";
case ISD::GlobalAddress: return "GlobalAddress";
case ISD::FrameIndex: return "FrameIndex";
+ case ISD::JumpTable: return "JumpTable";
case ISD::ConstantPool: return "ConstantPool";
case ISD::ExternalSymbol: return "ExternalSymbol";
case ISD::INTRINSIC_WO_CHAIN: {
case ISD::TargetConstantFP:return "TargetConstantFP";
case ISD::TargetGlobalAddress: return "TargetGlobalAddress";
case ISD::TargetFrameIndex: return "TargetFrameIndex";
+ case ISD::TargetJumpTable: return "TargetJumpTable";
case ISD::TargetConstantPool: return "TargetConstantPool";
case ISD::TargetExternalSymbol: return "TargetExternalSymbol";
// Control flow instructions
case ISD::BR: return "br";
+ case ISD::BRIND: return "brind";
case ISD::BRCOND: return "brcond";
case ISD::BR_CC: return "br_cc";
case ISD::RET: return "ret";
#include "llvm/CodeGen/MachineDebugInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SSARegMap.h"
/// SwitchCases - Vector of CaseBlock structures used to communicate
/// SwitchInst code generation information.
std::vector<SelectionDAGISel::CaseBlock> SwitchCases;
+ SelectionDAGISel::JumpTable JT;
/// FuncInfo - Information about the function as a whole.
///
SelectionDAGLowering(SelectionDAG &dag, TargetLowering &tli,
FunctionLoweringInfo &funcinfo)
: TLI(tli), DAG(dag), TD(DAG.getTarget().getTargetData()),
- FuncInfo(funcinfo) {
+ JT(0,0,0), FuncInfo(funcinfo) {
}
/// getRoot - Return the current virtual root of the Selection DAG.
// Helper for visitSwitch
void visitSwitchCase(SelectionDAGISel::CaseBlock &CB);
+ void visitJumpTable(SelectionDAGISel::JumpTable &JT);
// These all get lowered before this pass.
void visitInvoke(InvokeInst &I) { assert(0 && "TODO"); }
CurMBB->addSuccessor(CB.RHSBB);
}
+/// visitSwitchCase - Emits the necessary code to represent a single node in
+/// the binary search tree resulting from lowering a switch instruction.
+void SelectionDAGLowering::visitJumpTable(SelectionDAGISel::JumpTable &JT) {
+ // FIXME: Need to emit different code for PIC vs. Non-PIC, specifically,
+ // we need to add the address of the jump table to the value loaded, since
+ // the entries in the jump table will be differences rather than absolute
+ // addresses.
+
+ // Emit the code for the jump table
+ MVT::ValueType PTy = TLI.getPointerTy();
+ unsigned PTyBytes = MVT::getSizeInBits(PTy)/8;
+ SDOperand Copy = DAG.getCopyFromReg(getRoot(), JT.Reg, PTy);
+ SDOperand IDX = DAG.getNode(ISD::MUL, PTy, Copy,
+ DAG.getConstant(PTyBytes, PTy));
+ SDOperand ADD = DAG.getNode(ISD::ADD, PTy, IDX, DAG.getJumpTable(JT.JTI,PTy));
+ SDOperand LD = DAG.getLoad(PTy, Copy.getValue(1), ADD, DAG.getSrcValue(0));
+ DAG.setRoot(DAG.getNode(ISD::BRIND, MVT::Other, LD.getValue(1), LD));
+
+ // Update successor info
+ for (std::set<MachineBasicBlock*>::iterator ii = JT.SuccMBBs.begin(),
+ ee = JT.SuccMBBs.end(); ii != ee; ++ii)
+ JT.MBB->addSuccessor(*ii);
+}
+
void SelectionDAGLowering::visitSwitch(SwitchInst &I) {
// Figure out which block is immediately after the current one.
MachineBasicBlock *NextBlock = 0;
// search tree.
Value *SV = I.getOperand(0);
MachineBasicBlock *Default = FuncInfo.MBBMap[I.getDefaultDest()];
-
- // Get the current MachineFunction and LLVM basic block, for use in creating
- // and inserting new MBBs during the creation of the binary search tree.
+
+ // Get the MachineFunction which holds the current MBB. This is used during
+ // emission of jump tables, and when inserting any additional MBBs necessary
+ // to represent the switch.
MachineFunction *CurMF = CurMBB->getParent();
const BasicBlock *LLVMBB = CurMBB->getBasicBlock();
+ Reloc::Model Relocs = TLI.getTargetMachine().getRelocationModel();
+
+ // If the switch has more than 3 blocks, and is 100% dense, then emit a jump
+ // table rather than lowering the switch to a binary tree of conditional
+ // branches.
+ // FIXME: Make this work with 64 bit targets someday, possibly by always
+ // doing differences there so that entries stay 32 bits.
+ // FIXME: Make this work with PIC code
+ if (TLI.isOperationLegal(ISD::BRIND, TLI.getPointerTy()) &&
+ TLI.getPointerTy() == MVT::i32 &&
+ (Relocs == Reloc::Static || Relocs == Reloc::DynamicNoPIC) &&
+ Cases.size() > 3) {
+ uint64_t First = cast<ConstantIntegral>(Cases.front().first)->getRawValue();
+ uint64_t Last = cast<ConstantIntegral>(Cases.back().first)->getRawValue();
+
+ // Determine density
+ // FIXME: support sub-100% density
+ if (((Last - First) + 1ULL) == (uint64_t)Cases.size()) {
+ // Create a new basic block to hold the code for loading the address
+ // of the jump table, and jumping to it. Update successor information;
+ // we will either branch to the default case for the switch, or the jump
+ // table.
+ MachineBasicBlock *JumpTableBB = new MachineBasicBlock(LLVMBB);
+ CurMF->getBasicBlockList().insert(BBI, JumpTableBB);
+ CurMBB->addSuccessor(Default);
+ CurMBB->addSuccessor(JumpTableBB);
+
+ // Subtract the lowest switch case value from the value being switched on
+ // and conditional branch to default mbb if the result is greater than the
+ // difference between smallest and largest cases.
+ SDOperand SwitchOp = getValue(SV);
+ MVT::ValueType VT = SwitchOp.getValueType();
+ SDOperand SUB = DAG.getNode(ISD::SUB, VT, SwitchOp,
+ DAG.getConstant(First, VT));
+
+ // The SDNode we just created, which holds the value being switched on
+ // minus the the smallest case value, needs to be copied to a virtual
+ // register so it can be used as an index into the jump table in a
+ // subsequent basic block. This value may be smaller or larger than the
+ // target's pointer type, and therefore require extension or truncating.
+ if (VT > TLI.getPointerTy())
+ SwitchOp = DAG.getNode(ISD::TRUNCATE, TLI.getPointerTy(), SUB);
+ else
+ SwitchOp = DAG.getNode(ISD::ZERO_EXTEND, TLI.getPointerTy(), SUB);
+ unsigned JumpTableReg = FuncInfo.MakeReg(TLI.getPointerTy());
+ SDOperand CopyTo = DAG.getCopyToReg(getRoot(), JumpTableReg, SwitchOp);
+
+ // Emit the range check for the jump table, and branch to the default
+ // block for the switch statement if the value being switched on exceeds
+ // the largest case in the switch.
+ SDOperand CMP = DAG.getSetCC(TLI.getSetCCResultTy(), SUB,
+ DAG.getConstant(Last-First,VT), ISD::SETUGT);
+ DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, CopyTo, CMP,
+ DAG.getBasicBlock(Default)));
+
+ // Build a sorted vector of destination BBs, corresponding to each target
+ // of the switch.
+ // FIXME: need to insert DefaultMBB for each "hole" in the jump table,
+ // when we support jump tables with < 100% density.
+ std::set<MachineBasicBlock*> UniqueBBs;
+ std::vector<MachineBasicBlock*> DestBBs;
+ for (CaseItr ii = Cases.begin(), ee = Cases.end(); ii != ee; ++ii) {
+ DestBBs.push_back(ii->second);
+ UniqueBBs.insert(ii->second);
+ }
+ unsigned JTI = CurMF->getJumpTableInfo()->getJumpTableIndex(DestBBs);
+
+ // Set the jump table information so that we can codegen it as a second
+ // MachineBasicBlock
+ JT.Reg = JumpTableReg;
+ JT.JTI = JTI;
+ JT.MBB = JumpTableBB;
+ JT.SuccMBBs = UniqueBBs;
+ return;
+ }
+ }
// Push the initial CaseRec onto the worklist
std::vector<CaseRec> CaseVec;
SDL.visit(*LLVMBB->getTerminator());
// Copy over any CaseBlock records that may now exist due to SwitchInst
- // lowering.
+ // lowering, as well as any jump table information.
SwitchCases.clear();
SwitchCases = SDL.SwitchCases;
+ JT = SDL.JT;
// Make sure the root of the DAG is up-to-date.
DAG.setRoot(SDL.getRoot());
// Next, now that we know what the last MBB the LLVM BB expanded is, update
// PHI nodes in successors.
- if (SwitchCases.empty()) {
+ if (SwitchCases.empty() && JT.Reg == 0) {
for (unsigned i = 0, e = PHINodesToUpdate.size(); i != e; ++i) {
MachineInstr *PHI = PHINodesToUpdate[i].first;
assert(PHI->getOpcode() == TargetInstrInfo::PHI &&
return;
}
+ // If we need to emit a jump table,
+ if (JT.Reg) {
+ assert(SwitchCases.empty() && "Cannot have jump table and lowered switch");
+ SelectionDAG SDAG(TLI, MF, getAnalysisToUpdate<MachineDebugInfo>());
+ CurDAG = &SDAG;
+ SelectionDAGLowering SDL(SDAG, TLI, FuncInfo);
+ // Set the current basic block to the mbb we wish to insert the code into
+ BB = JT.MBB;
+ SDL.setCurrentBasicBlock(BB);
+ // Emit the code
+ SDL.visitJumpTable(JT);
+ SDAG.setRoot(SDL.getRoot());
+ CodeGenAndEmitDAG(SDAG);
+ // Update PHI Nodes
+ for (unsigned pi = 0, pe = PHINodesToUpdate.size(); pi != pe; ++pi) {
+ MachineInstr *PHI = PHINodesToUpdate[pi].first;
+ MachineBasicBlock *PHIBB = PHI->getParent();
+ assert(PHI->getOpcode() == TargetInstrInfo::PHI &&
+ "This is not a machine PHI node that we are updating!");
+ if (JT.SuccMBBs.find(PHIBB) != JT.SuccMBBs.end()) {
+ PHI->addRegOperand(PHINodesToUpdate[pi].second);
+ PHI->addMachineBasicBlockOperand(BB);
+ }
+ }
+ return;
+ }
+
// If we generated any switch lowering information, build and codegen any
// additional DAGs necessary.
for(unsigned i = 0, e = SwitchCases.size(); i != e; ++i) {
return Result;
}
-/// FIXME: document
+/// StoreValueToMemory - Stores the data in Val of type Ty at address Ptr. Ptr
+/// is the address of the memory at which to store Val, cast to GenericValue *.
+/// It is not a pointer to a GenericValue containing the address at which to
+/// store Val.
///
void ExecutionEngine::StoreValueToMemory(GenericValue Val, GenericValue *Ptr,
const Type *Ty) {
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineRelocation.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetJITInfo.h"
#include "llvm/Support/Debug.h"
/// ConstantPoolBase - A pointer to the first entry in the constant pool.
///
void *ConstantPoolBase;
- public:
+
+ /// ConstantPool - The constant pool for the current function.
+ ///
+ MachineJumpTableInfo *JumpTable;
+
+ /// JumpTableBase - A pointer to the first entry in the jump table.
+ ///
+ void *JumpTableBase;
+public:
JITEmitter(JIT &jit) : MemMgr(jit.getJITInfo().needsGOT()) {
TheJIT = &jit;
DEBUG(std::cerr <<
virtual void startFunction(MachineFunction &F);
virtual void finishFunction(MachineFunction &F);
virtual void emitConstantPool(MachineConstantPool *MCP);
+ virtual void initJumpTableInfo(MachineJumpTableInfo *MJTI);
+ virtual void emitJumpTableInfo(MachineJumpTableInfo *MJTI,
+ std::map<MachineBasicBlock*,uint64_t> &MBBM);
virtual void startFunctionStub(unsigned StubSize);
virtual void* finishFunctionStub(const Function *F);
virtual void emitByte(unsigned char B);
virtual uint64_t getCurrentPCValue();
virtual uint64_t getCurrentPCOffset();
virtual uint64_t getConstantPoolEntryAddress(unsigned Entry);
+ virtual uint64_t getJumpTableEntryAddress(unsigned Entry);
virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment);
private:
}
}
+void JITEmitter::initJumpTableInfo(MachineJumpTableInfo *MJTI) {
+ const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
+ if (JT.empty()) return;
+
+ unsigned Size = 0;
+ unsigned EntrySize = MJTI->getEntrySize();
+ for (unsigned i = 0, e = JT.size(); i != e; ++i)
+ Size += JT[i].MBBs.size() * EntrySize;
+
+ // Just allocate space for all the jump tables now. We will fix up the actual
+ // MBB entries in the tables after we emit the code for each block, since then
+ // we will know the final locations of the MBBs in memory.
+ JumpTable = MJTI;
+ JumpTableBase = MemMgr.allocateConstant(Size, MJTI->getAlignment());
+}
+
+void JITEmitter::emitJumpTableInfo(MachineJumpTableInfo *MJTI,
+ std::map<MachineBasicBlock*,uint64_t> &MBBM){
+ const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
+ if (JT.empty()) return;
+
+ unsigned Offset = 0;
+ unsigned EntrySize = MJTI->getEntrySize();
+
+ // For each jump table, map each target in the jump table to the address of
+ // an emitted MachineBasicBlock.
+ for (unsigned i = 0, e = JT.size(); i != e; ++i) {
+ const std::vector<MachineBasicBlock*> &MBBs = JT[i].MBBs;
+ for (unsigned mi = 0, me = MBBs.size(); mi != me; ++mi) {
+ uint64_t addr = MBBM[MBBs[mi]];
+ GenericValue addrgv;
+ const Type *Ty;
+ if (EntrySize == 4) {
+ addrgv.UIntVal = addr;
+ Ty = Type::UIntTy;
+ } else if (EntrySize == 8) {
+ addrgv.ULongVal = addr;
+ Ty = Type::ULongTy;
+ } else {
+ assert(0 && "Unhandled jump table entry size!");
+ abort();
+ }
+ // Store the address of the basic block for this jump table slot in the
+ // memory we allocated for the jump table in 'initJumpTableInfo'
+ void *ptr = (void *)((char *)JumpTableBase + Offset);
+ TheJIT->StoreValueToMemory(addrgv, (GenericValue *)ptr, Ty);
+ Offset += EntrySize;
+ }
+ }
+}
+
void JITEmitter::startFunctionStub(unsigned StubSize) {
SavedCurBlock = CurBlock; SavedCurByte = CurByte;
CurByte = CurBlock = MemMgr.allocateStub(StubSize);
ConstantPool->getConstants()[ConstantNum].Offset;
}
+// getJumpTableEntryAddress - Return the address of the JumpTable with index
+// 'Index' in the jumpp table that was last initialized with 'initJumpTableInfo'
+//
+uint64_t JITEmitter::getJumpTableEntryAddress(unsigned Index) {
+ const std::vector<MachineJumpTableEntry> &JT = JumpTable->getJumpTables();
+ assert(Index < JT.size() && "Invalid jump table index!");
+
+ unsigned Offset = 0;
+ unsigned EntrySize = JumpTable->getEntrySize();
+
+ for (unsigned i = 0; i < Index; ++i)
+ Offset += JT[i].MBBs.size() * EntrySize;
+
+ return (uint64_t)((char *)JumpTableBase + Offset);
+}
+
unsigned char* JITEmitter::allocateGlobal(unsigned size, unsigned alignment)
{
return MemMgr.allocateGlobal(size, alignment);
abort();
return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << PrivateGlobalPrefix << "LBB"
- << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber() << "\t" << CommentString << " "
- << MBBOp->getBasicBlock()->getName();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
return;
- }
case MachineOperand::MO_ConstantPoolIndex:
O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
+ setOperationAction(ISD::BRIND, MVT::i64, Expand);
setOperationAction(ISD::BR_CC, MVT::Other, Expand);
setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
case MachineOperand::MO_UnextendedImmed:
O << /*(unsigned int)*/MO.getImmedValue();
return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << PrivateGlobalPrefix << "LBB"
- << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t// "
- << MBBOp->getBasicBlock ()->getName ();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
return;
- }
case MachineOperand::MO_PCRelativeDisp:
std::cerr << "Shouldn't use addPCDisp() when building IA64 MachineInstrs";
abort ();
// register class for predicate registers
addRegisterClass(MVT::i1, IA64::PRRegisterClass);
+ setOperationAction(ISD::BRIND , MVT::i64, Expand);
setOperationAction(ISD::BR_CC , MVT::Other, Expand);
setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
printOperand(MI, OpNo+1);
}
+ virtual void printBasicBlockLabel(const MachineBasicBlock *MBB) const;
+
virtual bool runOnMachineFunction(MachineFunction &F) = 0;
virtual bool doFinalization(Module &M) = 0;
Data64bitsDirective = 0; // we can't emit a 64-bit unit
AlignmentIsInBytes = false; // Alignment is by power of 2.
ConstantPoolSection = "\t.const\t";
+ // FIXME: Conditionalize jump table section based on PIC
+ JumpTableSection = ".const";
LCOMMDirective = "\t.lcomm\t";
StaticCtorsSection = ".mod_init_func";
StaticDtorsSection = ".mod_term_func";
abort();
return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << "_"
- << MBBOp->getNumber() << "\t; " << MBBOp->getBasicBlock()->getName();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
+ return;
+ case MachineOperand::MO_JumpTableIndex:
+ O << PrivateGlobalPrefix << "JTI" << getFunctionNumber()
+ << '_' << MO.getJumpTableIndex();
+ // FIXME: PIC relocation model
return;
- }
-
case MachineOperand::MO_ConstantPoolIndex:
O << PrivateGlobalPrefix << "CPI" << getFunctionNumber()
<< '_' << MO.getConstantPoolIndex();
return;
}
+void PPCAsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB) const {
+ O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << "_"
+ << MBB->getNumber() << '\t' << CommentString
+ << MBB->getBasicBlock()->getName();
+}
/// runOnMachineFunction - This uses the printMachineInstruction()
/// method to print assembly for each instruction.
// Print out constants referenced by the function
EmitConstantPool(MF.getConstantPool());
+ // Print out jump tables referenced by the function
+ EmitJumpTableInfo(MF.getJumpTableInfo());
+
// Print out labels for the function.
const Function *F = MF.getFunction();
switch (F->getLinkage()) {
// Tracks which instruction references which BasicBlock
std::vector<std::pair<MachineBasicBlock*, unsigned*> > BBRefs;
// Tracks where each BasicBlock starts
- std::map<MachineBasicBlock*, long> BBLocations;
+ std::map<MachineBasicBlock*, uint64_t> BBLocations;
/// getMachineOpValue - evaluates the MachineOperand of a given MachineInstr
///
"JIT relocation model must be set to static or default!");
MCE.startFunction(MF);
MCE.emitConstantPool(MF.getConstantPool());
+ MCE.initJumpTableInfo(MF.getJumpTableInfo());
for (MachineFunction::iterator BB = MF.begin(), E = MF.end(); BB != E; ++BB)
emitBasicBlock(*BB);
+ MCE.emitJumpTableInfo(MF.getJumpTableInfo(), BBLocations);
MCE.finishFunction(MF);
// Resolve branches to BasicBlocks for the entire function
} else if (MO.isMachineBasicBlock()) {
unsigned* CurrPC = (unsigned*)(intptr_t)MCE.getCurrentPCValue();
BBRefs.push_back(std::make_pair(MO.getMachineBasicBlock(), CurrPC));
- } else if (MO.isConstantPoolIndex()) {
- unsigned index = MO.getConstantPoolIndex();
+ } else if (MO.isConstantPoolIndex() || MO.isJumpTableIndex()) {
+ if (MO.isConstantPoolIndex())
+ rv = MCE.getConstantPoolEntryAddress(MO.getConstantPoolIndex());
+ else
+ rv = MCE.getJumpTableEntryAddress(MO.getJumpTableIndex());
+
unsigned Opcode = MI.getOpcode();
- rv = MCE.getConstantPoolEntryAddress(index);
if (Opcode == PPC::LIS || Opcode == PPC::ADDIS) {
// lis wants hi16(addr)
if ((short)rv < 0) rv += 1 << 16;
// These load opcodes want lo16(addr)
rv &= 0xffff;
} else {
- assert(0 && "Unknown constant pool using instruction!");
+ assert(0 && "Unknown constant pool or jump table using instruction!");
}
} else {
std::cerr << "ERROR: Unknown type of MachineOperand: " << MO << "\n";
&& "Cannot handle constant offsets yet!");
Disp = N.getOperand(1).getOperand(0); // The global address.
assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||
- Disp.getOpcode() == ISD::TargetConstantPool);
+ Disp.getOpcode() == ISD::TargetConstantPool ||
+ Disp.getOpcode() == ISD::TargetJumpTable);
Base = N.getOperand(0);
return true; // [&g+r]
}
&& "Cannot handle constant offsets yet!");
Disp = N.getOperand(1).getOperand(0); // The global address.
assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||
- Disp.getOpcode() == ISD::TargetConstantPool);
+ Disp.getOpcode() == ISD::TargetConstantPool ||
+ Disp.getOpcode() == ISD::TargetJumpTable);
Base = N.getOperand(0);
return true; // [&g+r]
}
N->getOperand(4), Chain);
return;
}
+ case ISD::BRIND: {
+ SDOperand Chain, Target;
+ Select(Chain, N->getOperand(0));
+ Select(Target,N->getOperand(1));
+ Chain = SDOperand(CurDAG->getTargetNode(PPC::MTCTR, MVT::Other, Target,
+ Chain), 0);
+ Result = CurDAG->SelectNodeTo(N, PPC::BCTR, MVT::Other, Chain);
+ return;
+ }
}
SelectCode(Result, Op);
// appropriate instructions to materialize the address.
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
+ setOperationAction(ISD::JumpTable, MVT::i32, Custom);
// RET must be custom lowered, to meet ABI requirements
setOperationAction(ISD::RET , MVT::Other, Custom);
return Lo;
}
+static SDOperand LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
+ JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
+ SDOperand JTI = DAG.getTargetJumpTable(JT->getIndex(), MVT::i32);
+ SDOperand Zero = DAG.getConstant(0, MVT::i32);
+
+ const TargetMachine &TM = DAG.getTarget();
+
+ // If this is a non-darwin platform, we don't support non-static relo models
+ // yet.
+ if (TM.getRelocationModel() == Reloc::Static ||
+ !TM.getSubtarget<PPCSubtarget>().isDarwin()) {
+ // Generate non-pic code that has direct accesses to the constant pool.
+ // The address of the global is just (hi(&g)+lo(&g)).
+ SDOperand Hi = DAG.getNode(PPCISD::Hi, MVT::i32, JTI, Zero);
+ SDOperand Lo = DAG.getNode(PPCISD::Lo, MVT::i32, JTI, Zero);
+ return DAG.getNode(ISD::ADD, MVT::i32, Hi, Lo);
+ }
+
+ SDOperand Hi = DAG.getNode(PPCISD::Hi, MVT::i32, JTI, Zero);
+ if (TM.getRelocationModel() == Reloc::PIC) {
+ // With PIC, the first instruction is actually "GR+hi(&G)".
+ Hi = DAG.getNode(ISD::ADD, MVT::i32,
+ DAG.getNode(PPCISD::GlobalBaseReg, MVT::i32), Hi);
+ }
+
+ SDOperand Lo = DAG.getNode(PPCISD::Lo, MVT::i32, JTI, Zero);
+ Lo = DAG.getNode(ISD::ADD, MVT::i32, Hi, Lo);
+ return Lo;
+}
+
static SDOperand LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG) {
GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
GlobalValue *GV = GSDN->getGlobal();
default: assert(0 && "Wasn't expecting to be able to lower this!");
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
+ case ISD::JumpTable: return LowerJumpTable(Op, DAG);
case ISD::SETCC: return LowerSETCC(Op, DAG);
case ISD::VASTART: return LowerVASTART(Op, DAG, VarArgsFrameIndex);
case ISD::RET: return LowerRET(Op, DAG);
def MTLR : XFXForm_7_ext<31, 467, 8, (ops GPRC:$rS), "mtlr $rS", SprMTSPR>,
PPC970_DGroup_First, PPC970_Unit_FXU;
-def MFLR : XFXForm_1_ext<31, 339, 8, (ops GPRC:$rT), "mflr $rT", SprMFSPR>,
+def MFLR : XFXForm_1_ext<31, 339, 8, (ops GPRC:$rT), "mflr $rT", SprMFSPR>,
PPC970_DGroup_First, PPC970_Unit_FXU;
// Move to/from VRSAVE: despite being a SPR, the VRSAVE register is renamed like
def : Pat<(PPClo tglobaladdr:$in, 0), (LI tglobaladdr:$in)>;
def : Pat<(PPChi tconstpool:$in, 0), (LIS tconstpool:$in)>;
def : Pat<(PPClo tconstpool:$in, 0), (LI tconstpool:$in)>;
+def : Pat<(PPChi tjumptable:$in, 0), (LIS tjumptable:$in)>;
+def : Pat<(PPClo tjumptable:$in, 0), (LI tjumptable:$in)>;
def : Pat<(add GPRC:$in, (PPChi tglobaladdr:$g, 0)),
(ADDIS GPRC:$in, tglobaladdr:$g)>;
def : Pat<(add GPRC:$in, (PPChi tconstpool:$g, 0)),
(ADDIS GPRC:$in, tconstpool:$g)>;
+def : Pat<(add GPRC:$in, (PPChi tjumptable:$g, 0)),
+ (ADDIS GPRC:$in, tjumptable:$g)>;
// Fused negative multiply subtract, alternate pattern
def : Pat<(fsub F8RC:$B, (fmul F8RC:$A, F8RC:$C)),
case MachineOperand::MO_UnextendedImmed:
O << (int)MO.getImmedValue();
break;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t! "
- << MBBOp->getBasicBlock ()->getName ();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
return;
- }
case MachineOperand::MO_PCRelativeDisp:
std::cerr << "Shouldn't use addPCDisp() when building Sparc MachineInstrs";
abort ();
// Sparc doesn't have BRCOND either, it has BR_CC.
setOperationAction(ISD::BRCOND, MVT::Other, Expand);
+ setOperationAction(ISD::BRIND, MVT::i32, Expand);
setOperationAction(ISD::BR_CC, MVT::i32, Custom);
setOperationAction(ISD::BR_CC, MVT::f32, Custom);
setOperationAction(ISD::BR_CC, MVT::f64, Custom);
SDTCisInt<0>, SDTCisVT<1, OtherVT>
]>;
+def SDTBrind : SDTypeProfile<0, 1, [ // brind
+ SDTCisPtrTy<0>
+]>;
+
def SDTRet : SDTypeProfile<0, 0, []>; // ret
def SDTLoad : SDTypeProfile<1, 1, [ // load
"ConstantPoolSDNode">;
def tconstpool : SDNode<"ISD::TargetConstantPool", SDTPtrLeaf, [],
"ConstantPoolSDNode">;
+def jumptable : SDNode<"ISD::JumpTable", SDTPtrLeaf, [],
+ "JumpTableSDNode">;
+def tjumptable : SDNode<"ISD::TargetJumpTable", SDTPtrLeaf, [],
+ "JumpTableSDNode">;
def frameindex : SDNode<"ISD::FrameIndex", SDTPtrLeaf, [],
"FrameIndexSDNode">;
def tframeindex : SDNode<"ISD::TargetFrameIndex", SDTPtrLeaf, [],
def selectcc : SDNode<"ISD::SELECT_CC" , SDTSelectCC>;
def brcond : SDNode<"ISD::BRCOND" , SDTBrcond, [SDNPHasChain]>;
+def brind : SDNode<"ISD::BRIND" , SDTBrind, [SDNPHasChain]>;
def br : SDNode<"ISD::BR" , SDTBr, [SDNPHasChain]>;
def ret : SDNode<"ISD::RET" , SDTRet, [SDNPHasChain]>;
// Print out constants referenced by the function
EmitConstantPool(MF.getConstantPool());
+ // Print out jump tables referenced by the function
+ EmitJumpTableInfo(MF.getJumpTableInfo());
+
// Print out labels for the function.
const Function *F = MF.getFunction();
switch (F->getLinkage()) {
O << '$';
O << (int)MO.getImmedValue();
return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << PrivateGlobalPrefix << "BB"
- << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t# "
- << MBBOp->getBasicBlock ()->getName ();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
return;
- }
case MachineOperand::MO_PCRelativeDisp:
std::cerr << "Shouldn't use addPCDisp() when building X86 MachineInstrs";
abort ();
return;
+ case MachineOperand::MO_JumpTableIndex: {
+ bool isMemOp = Modifier && !strcmp(Modifier, "mem");
+ if (!isMemOp) O << '$';
+ O << PrivateGlobalPrefix << "JTI" << getFunctionNumber() << "_"
+ << MO.getJumpTableIndex();
+ // FIXME: PIC relocation model
+ return;
+ }
case MachineOperand::MO_ConstantPoolIndex: {
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
if (!isMemOp) O << '$';
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
ConstantPoolSection = "\t.const\n";
+ JumpTableSection = "\t.const\n"; // FIXME: depends on PIC mode
LCOMMDirective = "\t.lcomm\t";
COMMDirectiveTakesAlignment = false;
HasDotTypeDotSizeDirective = false;
return false; // success
}
+void X86SharedAsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB)
+ const {
+ O << PrivateGlobalPrefix << "BB"
+ << Mang->getValueName(MBB->getParent()->getFunction())
+ << "_" << MBB->getNumber() << '\t' << CommentString
+ << MBB->getBasicBlock()->getName();
+}
+
/// createX86CodePrinterPass - Returns a pass that prints the X86 assembly code
/// for a MachineFunction to the given output stream, using the given target
/// machine description.
MI->getOperand(Op+3).isGlobalAddress() ||
MI->getOperand(Op+3).isConstantPoolIndex());
}
+
+ virtual void printBasicBlockLabel(const MachineBasicBlock *MBB) const;
};
} // end namespace llvm
class Emitter : public MachineFunctionPass {
const X86InstrInfo *II;
MachineCodeEmitter &MCE;
- std::map<const MachineBasicBlock*, unsigned> BasicBlockAddrs;
- std::vector<std::pair<const MachineBasicBlock *, unsigned> > BBRefs;
+ std::map<MachineBasicBlock*, uint64_t> BasicBlockAddrs;
+ std::vector<std::pair<MachineBasicBlock *, unsigned> > BBRefs;
public:
explicit Emitter(MachineCodeEmitter &mce) : II(0), MCE(mce) {}
Emitter(MachineCodeEmitter &mce, const X86InstrInfo& ii)
void emitInstruction(const MachineInstr &MI);
private:
- void emitBasicBlock(const MachineBasicBlock &MBB);
-
- void emitPCRelativeBlockAddress(const MachineBasicBlock *BB);
+ void emitBasicBlock(MachineBasicBlock &MBB);
+ void emitPCRelativeBlockAddress(MachineBasicBlock *MBB);
void emitPCRelativeValue(unsigned Address);
void emitGlobalAddressForCall(GlobalValue *GV, bool isTailCall);
void emitGlobalAddressForPtr(GlobalValue *GV, int Disp = 0);
MCE.startFunction(MF);
MCE.emitConstantPool(MF.getConstantPool());
+ MCE.initJumpTableInfo(MF.getJumpTableInfo());
for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
emitBasicBlock(*I);
+ MCE.emitJumpTableInfo(MF.getJumpTableInfo(), BasicBlockAddrs);
MCE.finishFunction(MF);
// Resolve all forward branches now...
return false;
}
-void Emitter::emitBasicBlock(const MachineBasicBlock &MBB) {
+void Emitter::emitBasicBlock(MachineBasicBlock &MBB) {
if (uint64_t Addr = MCE.getCurrentPCValue())
BasicBlockAddrs[&MBB] = Addr;
/// (because this is a forward branch), it keeps track of the information
/// necessary to resolve this address later (and emits a dummy value).
///
-void Emitter::emitPCRelativeBlockAddress(const MachineBasicBlock *MBB) {
+void Emitter::emitPCRelativeBlockAddress(MachineBasicBlock *MBB) {
// If this is a backwards branch, we already know the address of the target,
// so just emit the value.
- std::map<const MachineBasicBlock*, unsigned>::iterator I =
- BasicBlockAddrs.find(MBB);
+ std::map<MachineBasicBlock*,uint64_t>::iterator I = BasicBlockAddrs.find(MBB);
if (I != BasicBlockAddrs.end()) {
emitPCRelativeValue(I->second);
} else {
} else if (Op3.isConstantPoolIndex()) {
DispVal += MCE.getConstantPoolEntryAddress(Op3.getConstantPoolIndex());
DispVal += Op3.getOffset();
+ } else if (Op3.isJumpTableIndex()) {
+ DispVal += MCE.getJumpTableEntryAddress(Op3.getJumpTableIndex());
} else {
DispVal = Op3.getImmedValue();
}
assert(sizeOfImm(Desc) == 4 &&
"Don't know how to emit non-pointer values!");
emitExternalSymbolAddress(MO1.getSymbolName(), false, false);
+ } else if (MO1.isJumpTableIndex()) {
+ assert(sizeOfImm(Desc) == 4 &&
+ "Don't know how to emit non-pointer values!");
+ emitConstant(MCE.getJumpTableEntryAddress(MO1.getJumpTableIndex()), 4);
} else {
emitConstant(MO1.getImmedValue(), sizeOfImm(Desc));
}
setOperationAction(ISD::RET , MVT::Other, Custom);
// Darwin ABI issue.
setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
+ setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
// 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
return Chain;
}
- // ConstantPool, GlobalAddress, and ExternalSymbol are lowered as their
- // target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
+ // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
+ // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
// one of the above mentioned nodes. It has to be wrapped because otherwise
// Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
// be used to form addressing mode. These wrapped nodes will be selected
return Result;
}
+ case ISD::JumpTable: {
+ JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
+ SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
+ DAG.getTargetJumpTable(JT->getIndex(),
+ getPointerTy()));
+ if (Subtarget->isTargetDarwin()) {
+ // With PIC, the address is actually $g + Offset.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC)
+ Result = DAG.getNode(ISD::ADD, getPointerTy(),
+ DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()), Result);
+ }
+
+ return Result;
+ }
case ISD::GlobalAddress: {
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
class IBr<bits<8> opcode, dag ops, string asm, list<dag> pattern> :
I<opcode, RawFrm, ops, asm, pattern>;
-// Conditional branches
+// Indirect branches
let isBarrier = 1 in
def JMP : IBr<0xE9, (ops brtarget:$dst), "jmp $dst", [(br bb:$dst)]>;
+let isBranch = 1, isTerminator = 1, noResults = 1, isBarrier = 1 in {
+ def JMP32r : I<0xFF, MRM4r, (ops R32:$dst), "jmp{l} {*}$dst",
+ [(brind R32:$dst)]>;
+ def JMP32m : I<0xFF, MRM4m, (ops i32mem:$dst), "jmp{l} {*}$dst",
+ [(brind (loadi32 addr:$dst))]>;
+}
+
+// Conditional branches
def JE : IBr<0x84, (ops brtarget:$dst), "je $dst",
[(X86brcond bb:$dst, X86_COND_E)]>, TB;
def JNE : IBr<0x85, (ops brtarget:$dst), "jne $dst",
// ConstantPool GlobalAddress, ExternalSymbol
def : Pat<(i32 (X86Wrapper tconstpool :$dst)), (MOV32ri tconstpool :$dst)>;
+def : Pat<(i32 (X86Wrapper tjumptable :$dst)), (MOV32ri tjumptable :$dst)>;
def : Pat<(i32 (X86Wrapper tglobaladdr :$dst)), (MOV32ri tglobaladdr :$dst)>;
def : Pat<(i32 (X86Wrapper texternalsym:$dst)), (MOV32ri texternalsym:$dst)>;
def : Pat<(add R32:$src1, (X86Wrapper tconstpool:$src2)),
(ADD32ri R32:$src1, tconstpool:$src2)>;
+def : Pat<(add R32:$src1, (X86Wrapper tjumptable:$src2)),
+ (ADD32ri R32:$src1, tjumptable:$src2)>;
def : Pat<(add R32:$src1, (X86Wrapper tglobaladdr :$src2)),
(ADD32ri R32:$src1, tglobaladdr:$src2)>;
def : Pat<(add R32:$src1, (X86Wrapper texternalsym:$src2)),
(ADD32ri R32:$src1, texternalsym:$src2)>;
+// FIXME: can you really ever store to a constant pool?
def : Pat<(store (X86Wrapper tconstpool:$src), addr:$dst),
(MOV32mi addr:$dst, tconstpool:$src)>;
def : Pat<(store (X86Wrapper tglobaladdr:$src), addr:$dst),
case MachineOperand::MO_UnextendedImmed:
O << (int)MO.getImmedValue();
return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << PrivateGlobalPrefix << "BB"
- << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t# "
- << MBBOp->getBasicBlock ()->getName ();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
return;
- }
case MachineOperand::MO_PCRelativeDisp:
assert(0 && "Shouldn't use addPCDisp() when building X86 MachineInstrs");
abort ();
<< " case ISD::TargetConstant:\n"
<< " case ISD::TargetConstantPool:\n"
<< " case ISD::TargetFrameIndex:\n"
+ << " case ISD::TargetJumpTable:\n"
<< " case ISD::TargetGlobalAddress: {\n"
<< " Result = N;\n"
<< " return;\n"
projects / oota-llvm.git / commitdiff