//===-- TargetMachine.cpp - General Target Information ---------------------==//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
//
// This file describes the general parts of a Target machine.
-// This file also implements MachineInstrInfo and MachineCacheInfo.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/MachineInstrInfo.h"
-#include "llvm/Target/MachineCacheInfo.h"
-#include "llvm/CodeGen/PreSelection.h"
-#include "llvm/CodeGen/StackSlots.h"
-#include "llvm/CodeGen/InstrSelection.h"
-#include "llvm/CodeGen/InstrScheduling.h"
-#include "llvm/CodeGen/RegisterAllocation.h"
-#include "llvm/CodeGen/PeepholeOpts.h"
-#include "llvm/CodeGen/MachineCodeForMethod.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include "llvm/Reoptimizer/Mapping/MappingInfo.h"
-#include "llvm/Reoptimizer/Mapping/FInfo.h"
-#include "llvm/Transforms/Scalar.h"
+#include "llvm/Type.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
#include "Support/CommandLine.h"
-#include "llvm/PassManager.h"
-#include "llvm/Function.h"
-#include "llvm/DerivedTypes.h"
-
-//---------------------------------------------------------------------------
-// Command line options to control choice of code generation passes.
-//---------------------------------------------------------------------------
-
-static cl::opt<bool> DisablePreSelect("nopreselect",
- cl::desc("Disable preselection pass"));
-
-static cl::opt<bool> DisableSched("nosched",
- cl::desc("Disable local scheduling pass"));
-
-static cl::opt<bool> DisablePeephole("nopeephole",
- cl::desc("Disable peephole optimization pass"));
+using namespace llvm;
//---------------------------------------------------------------------------
-// class TargetMachine
-//
-// Purpose:
-// Machine description.
-//
-//---------------------------------------------------------------------------
-
-
-// function TargetMachine::findOptimalStorageSize
-//
-// Purpose:
-// This default implementation assumes that all sub-word data items use
-// space equal to optSizeForSubWordData, and all other primitive data
-// items use space according to the type.
-//
-unsigned int
-TargetMachine::findOptimalStorageSize(const Type* ty) const
-{
- switch(ty->getPrimitiveID())
- {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID:
- case Type::UShortTyID:
- case Type::ShortTyID:
- return optSizeForSubWordData;
-
- default:
- return DataLayout.getTypeSize(ty);
- }
-}
-
-
-//===---------------------------------------------------------------------===//
-// Default code generation passes.
-//
-// Native code generation for a specified target.
-//===---------------------------------------------------------------------===//
-
-class ConstructMachineCodeForFunction : public FunctionPass {
- TargetMachine &Target;
-public:
- inline ConstructMachineCodeForFunction(TargetMachine &T) : Target(T) {}
-
- const char *getPassName() const {
- return "ConstructMachineCodeForFunction";
- }
+// Command-line options that tend to be useful on more than one back-end.
+//
- bool runOnFunction(Function &F) {
- MachineCodeForMethod::construct(&F, Target);
- return false;
- }
+namespace llvm {
+ bool PrintMachineCode;
+ bool NoFramePointerElim;
};
-
-struct FreeMachineCodeForFunction : public FunctionPass {
- const char *getPassName() const { return "FreeMachineCodeForFunction"; }
-
- static void freeMachineCode(Instruction &I) {
- MachineCodeForInstruction::destroy(&I);
- }
-
- bool runOnFunction(Function &F) {
- for (Function::iterator FI = F.begin(), FE = F.end(); FI != FE; ++FI)
- for (BasicBlock::iterator I = FI->begin(), E = FI->end(); I != E; ++I)
- MachineCodeForInstruction::get(I).dropAllReferences();
-
- for (Function::iterator FI = F.begin(), FE = F.end(); FI != FE; ++FI)
- for_each(FI->begin(), FI->end(), freeMachineCode);
-
- return false;
- }
+namespace {
+ cl::opt<bool, true> PrintCode("print-machineinstrs",
+ cl::desc("Print generated machine code"),
+ cl::location(PrintMachineCode), cl::init(false));
+
+ cl::opt<bool, true>
+ DisableFPElim("disable-fp-elim",
+ cl::desc("Disable frame pointer elimination optimization"),
+ cl::location(NoFramePointerElim),
+ cl::init(false));
};
-// addPassesToEmitAssembly - This method controls the entire code generation
-// process for the ultra sparc.
-//
-void
-TargetMachine::addPassesToEmitAssembly(PassManager &PM, std::ostream &Out)
-{
- // Construct and initialize the MachineCodeForMethod object for this fn.
- PM.add(new ConstructMachineCodeForFunction(*this));
-
- //Insert empty stackslots in the stack frame of each function
- //so %fp+offset-8 and %fp+offset-16 are empty slots now!
- PM.add(createStackSlotsPass(*this));
-
- // Specialize LLVM code for this target machine and then
- // run basic dataflow optimizations on LLVM code.
- if (!DisablePreSelect)
- {
- PM.add(createPreSelectionPass(*this));
- PM.add(createReassociatePass());
- PM.add(createGCSEPass());
- PM.add(createLICMPass());
- }
-
- PM.add(createInstructionSelectionPass(*this));
-
- if (!DisableSched)
- PM.add(createInstructionSchedulingWithSSAPass(*this));
-
- PM.add(getRegisterAllocator(*this));
-
- PM.add(getPrologEpilogInsertionPass());
-
- if (!DisablePeephole)
- PM.add(createPeepholeOptsPass(*this));
-
- PM.add(MappingInfoForFunction(Out));
-
- // Output assembly language to the .s file. Assembly emission is split into
- // two parts: Function output and Global value output. This is because
- // function output is pipelined with all of the rest of code generation stuff,
- // allowing machine code representations for functions to be free'd after the
- // function has been emitted.
- //
- PM.add(getFunctionAsmPrinterPass(Out));
- PM.add(new FreeMachineCodeForFunction()); // Free stuff no longer needed
-
- // Emit Module level assembly after all of the functions have been processed.
- PM.add(getModuleAsmPrinterPass(Out));
-
- // Emit bytecode to the assembly file into its special section next
- PM.add(getEmitBytecodeToAsmPass(Out));
- PM.add(getFunctionInfo(Out));
-}
-
-
-//---------------------------------------------------------------------------
-// class MachineInstructionInfo
-// Interface to description of machine instructions
//---------------------------------------------------------------------------
-
-
-/*ctor*/
-MachineInstrInfo::MachineInstrInfo(const TargetMachine& tgt,
- const MachineInstrDescriptor* _desc,
- unsigned int _descSize,
- unsigned int _numRealOpCodes)
- : target(tgt),
- desc(_desc), descSize(_descSize), numRealOpCodes(_numRealOpCodes)
-{
- // FIXME: TargetInstrDescriptors should not be global
- assert(TargetInstrDescriptors == NULL && desc != NULL);
- TargetInstrDescriptors = desc; // initialize global variable
-}
-
-
-MachineInstrInfo::~MachineInstrInfo()
-{
- TargetInstrDescriptors = NULL; // reset global variable
+// TargetMachine Class
+//
+TargetMachine::TargetMachine(const std::string &name, IntrinsicLowering *il,
+ bool LittleEndian,
+ unsigned char PtrSize, unsigned char PtrAl,
+ unsigned char DoubleAl, unsigned char FloatAl,
+ unsigned char LongAl, unsigned char IntAl,
+ unsigned char ShortAl, unsigned char ByteAl)
+ : Name(name), DataLayout(name, LittleEndian,
+ PtrSize, PtrAl, DoubleAl, FloatAl, LongAl,
+ IntAl, ShortAl, ByteAl) {
+ IL = il ? il : new DefaultIntrinsicLowering();
}
-
-
-bool
-MachineInstrInfo::constantFitsInImmedField(MachineOpCode opCode,
- int64_t intValue) const
-{
- // First, check if opCode has an immed field.
- bool isSignExtended;
- uint64_t maxImmedValue = maxImmedConstant(opCode, isSignExtended);
- if (maxImmedValue != 0)
- {
- // NEED TO HANDLE UNSIGNED VALUES SINCE THEY MAY BECOME MUCH
- // SMALLER AFTER CASTING TO SIGN-EXTENDED int, short, or char.
- // See CreateUIntSetInstruction in SparcInstrInfo.cpp.
-
- // Now check if the constant fits
- if (intValue <= (int64_t) maxImmedValue &&
- intValue >= -((int64_t) maxImmedValue+1))
- return true;
- }
-
- return false;
+TargetMachine::TargetMachine(const std::string &name, IntrinsicLowering *il,
+ const Module &M)
+ : Name(name), DataLayout(name, &M) {
+ IL = il ? il : new DefaultIntrinsicLowering();
}
-
-//---------------------------------------------------------------------------
-// class MachineCacheInfo
-//
-// Purpose:
-// Describes properties of the target cache architecture.
-//---------------------------------------------------------------------------
-
-/*ctor*/
-MachineCacheInfo::MachineCacheInfo(const TargetMachine& tgt)
- : target(tgt)
-{
- Initialize();
+TargetMachine::~TargetMachine() {
+ delete IL;
}
-void
-MachineCacheInfo::Initialize()
-{
- numLevels = 2;
- cacheLineSizes.push_back(16); cacheLineSizes.push_back(32);
- cacheSizes.push_back(1 << 15); cacheSizes.push_back(1 << 20);
- cacheAssoc.push_back(1); cacheAssoc.push_back(4);
-}
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