//===-- TargetMachine.cpp - General Target Information ---------------------==//
//
// This file describes the general parts of a Target machine.
-// This file also implements the InstInfo interface as well...
+// This file also implements MachineInstrInfo and MachineCacheInfo.
//
//===----------------------------------------------------------------------===//
-#include "llvm/Target/InstInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/MachineInstrInfo.h"
+#include "llvm/Target/MachineCacheInfo.h"
+#include "llvm/CodeGen/PreSelection.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 "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"));
+
//---------------------------------------------------------------------------
// class TargetMachine
//
//
//---------------------------------------------------------------------------
+
// function TargetMachine::findOptimalStorageSize
//
// Purpose:
// 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;
+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";
+ }
+
+ bool runOnFunction(Function &F) {
+ MachineCodeForMethod::construct(&F, Target);
+ return false;
+ }
+};
+
+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);
- default:
- return DataLayout.getTypeSize(ty);
+ return 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));
+
+ // 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));
}
/*ctor*/
-MachineInstrInfo::MachineInstrInfo(const MachineInstrDescriptor* _desc,
+MachineInstrInfo::MachineInstrInfo(const TargetMachine& tgt,
+ const MachineInstrDescriptor* _desc,
unsigned int _descSize,
unsigned int _numRealOpCodes)
- : desc(_desc), descSize(_descSize), numRealOpCodes(_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() {
+MachineInstrInfo::~MachineInstrInfo()
+{
TargetInstrDescriptors = NULL; // reset global variable
}
// First, check if opCode has an immed field.
bool isSignExtended;
uint64_t maxImmedValue = maxImmedConstant(opCode, isSignExtended);
- if (maxImmedValue != 0) {
- // Now check if the constant fits
- if (intValue <= (int64_t) maxImmedValue &&
- intValue >= -((int64_t) maxImmedValue+1))
- return true;
- }
+ 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;
}
+
+
+//---------------------------------------------------------------------------
+// class MachineCacheInfo
+//
+// Purpose:
+// Describes properties of the target cache architecture.
+//---------------------------------------------------------------------------
+
+/*ctor*/
+MachineCacheInfo::MachineCacheInfo(const TargetMachine& tgt)
+ : target(tgt)
+{
+ Initialize();
+}
+
+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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