//===-- Sparc.cpp - General implementation file for the Sparc Target ------===//
+//
+// 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 contains the code for the Sparc Target that does not fit in any of
// the other files in this directory.
//===----------------------------------------------------------------------===//
#include "SparcInternals.h"
-#include "llvm/Target/Sparc.h"
-#include "llvm/CodeGen/InstrScheduling.h"
-#include "llvm/CodeGen/InstrSelection.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include "llvm/CodeGen/MachineCodeForMethod.h"
-#include "llvm/CodeGen/RegisterAllocation.h"
+#include "MappingInfo.h"
#include "llvm/Function.h"
-#include "llvm/BasicBlock.h"
#include "llvm/PassManager.h"
-#include <iostream>
-using std::cerr;
+#include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineFunctionInfo.h"
+#include "llvm/CodeGen/InstrSelection.h"
+#include "llvm/CodeGen/InstrScheduling.h"
+#include "llvm/CodeGen/MachineCodeForInstruction.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/Target/TargetMachineImpls.h"
+#include "Support/CommandLine.h"
+static const unsigned ImplicitRegUseList[] = { 0 }; /* not used yet */
// Build the MachineInstruction Description Array...
-const MachineInstrDescriptor SparcMachineInstrDesc[] = {
+const TargetInstrDescriptor SparcMachineInstrDesc[] = {
#define I(ENUM, OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS) \
{ OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
- NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS },
+ NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS, 0, \
+ ImplicitRegUseList, ImplicitRegUseList },
#include "SparcInstr.def"
};
+//---------------------------------------------------------------------------
+// Command line options to control choice of code generation passes.
+//---------------------------------------------------------------------------
+
+static cl::opt<bool> DisablePreOpt("disable-preopt",
+ cl::desc("Disable optimizations prior to instruction selection"));
+
+static cl::opt<bool> DisableSched("disable-sched",
+ cl::desc("Disable local scheduling pass"));
+
+static cl::opt<bool> DisablePeephole("disable-peephole",
+ cl::desc("Disable peephole optimization pass"));
+
+static cl::opt<bool> EmitMappingInfo("enable-maps",
+ cl::desc("Emit LLVM-to-MachineCode mapping info to assembly"));
+
+static cl::opt<bool> DisableStrip("disable-strip",
+ cl::desc("Do not strip the LLVM bytecode included in executable"));
+
+static cl::opt<bool> DumpInput("dump-input",
+ cl::desc("Print bytecode before native code generation"),
+ cl::Hidden);
+
//----------------------------------------------------------------------------
// allocateSparcTargetMachine - Allocate and return a subclass of TargetMachine
// that implements the Sparc backend. (the llvm/CodeGen/Sparc.h interface)
//----------------------------------------------------------------------------
-TargetMachine *allocateSparcTargetMachine() { return new UltraSparc(); }
-
-
+TargetMachine *allocateSparcTargetMachine(const Module &M) {
+ return new UltraSparc();
+}
//---------------------------------------------------------------------------
// class UltraSparcFrameInfo
//
-// Purpose:
// Interface to stack frame layout info for the UltraSPARC.
// Starting offsets for each area of the stack frame are aligned at
// a multiple of getStackFrameSizeAlignment().
//---------------------------------------------------------------------------
int
-UltraSparcFrameInfo::getFirstAutomaticVarOffset(MachineCodeForMethod& ,
+UltraSparcFrameInfo::getFirstAutomaticVarOffset(MachineFunction& ,
bool& pos) const
{
pos = false; // static stack area grows downwards
}
int
-UltraSparcFrameInfo::getRegSpillAreaOffset(MachineCodeForMethod& mcInfo,
+UltraSparcFrameInfo::getRegSpillAreaOffset(MachineFunction& mcInfo,
bool& pos) const
{
- mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
+ // ensure no more auto vars are added
+ mcInfo.getInfo()->freezeAutomaticVarsArea();
pos = false; // static stack area grows downwards
- unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
+ unsigned autoVarsSize = mcInfo.getInfo()->getAutomaticVarsSize();
return StaticAreaOffsetFromFP - autoVarsSize;
}
int
-UltraSparcFrameInfo::getTmpAreaOffset(MachineCodeForMethod& mcInfo,
+UltraSparcFrameInfo::getTmpAreaOffset(MachineFunction& mcInfo,
bool& pos) const
{
- mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
- mcInfo.freezeSpillsArea(); // ensure no more spill slots are added
+ MachineFunctionInfo *MFI = mcInfo.getInfo();
+ MFI->freezeAutomaticVarsArea(); // ensure no more auto vars are added
+ MFI->freezeSpillsArea(); // ensure no more spill slots are added
pos = false; // static stack area grows downwards
- unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
- unsigned int spillAreaSize = mcInfo.getRegSpillsSize();
+ unsigned autoVarsSize = MFI->getAutomaticVarsSize();
+ unsigned spillAreaSize = MFI->getRegSpillsSize();
int offset = autoVarsSize + spillAreaSize;
return StaticAreaOffsetFromFP - offset;
}
int
-UltraSparcFrameInfo::getDynamicAreaOffset(MachineCodeForMethod& mcInfo,
+UltraSparcFrameInfo::getDynamicAreaOffset(MachineFunction& mcInfo,
bool& pos) const
{
// Dynamic stack area grows downwards starting at top of opt-args area.
// during calls and traps, so they are shifted downwards on each
// dynamic-size alloca.
pos = false;
- unsigned int optArgsSize = mcInfo.getMaxOptionalArgsSize();
+ unsigned optArgsSize = mcInfo.getInfo()->getMaxOptionalArgsSize();
+ if (int extra = optArgsSize % getStackFrameSizeAlignment())
+ optArgsSize += (getStackFrameSizeAlignment() - extra);
int offset = optArgsSize + FirstOptionalOutgoingArgOffsetFromSP;
assert((offset - OFFSET) % getStackFrameSizeAlignment() == 0);
return offset;
}
-
//---------------------------------------------------------------------------
// class UltraSparcMachine
//
// Primary interface to machine description for the UltraSPARC.
// Primarily just initializes machine-dependent parameters in
// class TargetMachine, and creates machine-dependent subclasses
-// for classes such as MachineInstrInfo.
+// for classes such as TargetInstrInfo.
//
//---------------------------------------------------------------------------
UltraSparc::UltraSparc()
- : TargetMachine("UltraSparc-Native"),
- instrInfo(*this),
+ : TargetMachine("UltraSparc-Native", false),
schedInfo(*this),
regInfo(*this),
frameInfo(*this),
- cacheInfo(*this)
-{
- optSizeForSubWordData = 4;
- minMemOpWordSize = 8;
- maxAtomicMemOpWordSize = 8;
+ cacheInfo(*this) {
}
+// addPassesToEmitAssembly - This method controls the entire code generation
+// process for the ultra sparc.
+//
+bool UltraSparc::addPassesToEmitAssembly(PassManager &PM, std::ostream &Out)
+{
+ // The following 3 passes used to be inserted specially by llc.
+ // Replace malloc and free instructions with library calls.
+ PM.add(createLowerAllocationsPass());
+
+ // Strip all of the symbols from the bytecode so that it will be smaller...
+ if (!DisableStrip)
+ PM.add(createSymbolStrippingPass());
+ // FIXME: implement the switch instruction in the instruction selector.
+ PM.add(createLowerSwitchPass());
-//===---------------------------------------------------------------------===//
-// GenerateCodeForTarget Pass
-//
-// 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 "Sparc ConstructMachineCodeForFunction";
- }
-
- bool runOnFunction(Function *F) {
- MachineCodeForMethod::construct(F, Target);
- return false;
- }
-};
-
-class InstructionSelection : public FunctionPass {
- TargetMachine &Target;
-public:
- inline InstructionSelection(TargetMachine &T) : Target(T) {}
- const char *getPassName() const { return "Sparc Instruction Selection"; }
-
- bool runOnFunction(Function *F) {
- if (SelectInstructionsForMethod(F, Target)) {
- cerr << "Instr selection failed for function " << F->getName() << "\n";
- abort();
- }
- return false;
- }
-};
-
-struct FreeMachineCodeForFunction : public FunctionPass {
- const char *getPassName() const { return "Sparc FreeMachineCodeForFunction"; }
-
- static void freeMachineCode(Instruction *I) {
- MachineCodeForInstruction::destroy(I);
- }
+ // FIXME: implement the invoke/unwind instructions!
+ PM.add(createLowerInvokePass());
- 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 (BasicBlock::iterator I = (*FI)->begin(), E = (*FI)->end();
- I != E; ++I)
- freeMachineCode(*I);
-
- return false;
+ // decompose multi-dimensional array references into single-dim refs
+ PM.add(createDecomposeMultiDimRefsPass());
+
+ // Construct and initialize the MachineFunction object for this fn.
+ PM.add(createMachineCodeConstructionPass(*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));
+
+ if (!DisablePreOpt) {
+ // Specialize LLVM code for this target machine
+ PM.add(createPreSelectionPass(*this));
+ // Run basic dataflow optimizations on LLVM code
+ PM.add(createReassociatePass());
+ PM.add(createLICMPass());
+ PM.add(createGCSEPass());
}
-};
+
+ // If LLVM dumping after transformations is requested, add it to the pipeline
+ if (DumpInput)
+ PM.add(new PrintFunctionPass("Input code to instr. selection:\n",
+ &std::cerr));
+ PM.add(createInstructionSelectionPass(*this));
+ if (!DisableSched)
+ PM.add(createInstructionSchedulingWithSSAPass(*this));
-// addPassesToEmitAssembly - This method controls the entire code generation
-// process for the ultra sparc.
-//
-void UltraSparc::addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) {
- // Construct and initialize the MachineCodeForMethod object for this fn.
- PM.add(new ConstructMachineCodeForFunction(*this));
+ PM.add(getRegisterAllocator(*this));
- PM.add(new InstructionSelection(*this));
+ PM.add(getPrologEpilogInsertionPass());
- PM.add(createInstructionSchedulingWithSSAPass(*this));
+ if (!DisablePeephole)
+ PM.add(createPeepholeOptsPass(*this));
+
+ if (EmitMappingInfo)
+ PM.add(getMappingInfoAsmPrinterPass(Out));
- PM.add(getRegisterAllocator(*this));
-
- //PM.add(new OptimizeLeafProcedures());
- //PM.add(new DeleteFallThroughBranches());
- //PM.add(new RemoveChainedBranches()); // should be folded with previous
- //PM.add(new RemoveRedundantOps()); // operations with %g0, NOP, etc.
-
- PM.add(createPrologEpilogCodeInserter(*this));
-
// 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(PM, Out));
- PM.add(new FreeMachineCodeForFunction()); // Free stuff no longer needed
+ PM.add(getFunctionAsmPrinterPass(Out));
+ PM.add(createMachineCodeDestructionPass()); // Free stuff no longer needed
// Emit Module level assembly after all of the functions have been processed.
- PM.add(getModuleAsmPrinterPass(PM, Out));
+ PM.add(getModuleAsmPrinterPass(Out));
+
+ // Emit bytecode to the assembly file into its special section next
+ if (EmitMappingInfo)
+ PM.add(getBytecodeAsmPrinterPass(Out));
+
+ return false;
+}
+
+// addPassesToJITCompile - This method controls the JIT method of code
+// generation for the UltraSparc.
+//
+bool UltraSparc::addPassesToJITCompile(FunctionPassManager &PM) {
+ const TargetData &TD = getTargetData();
+
+ PM.add(new TargetData("lli", TD.isLittleEndian(), TD.getPointerSize(),
+ TD.getPointerAlignment(), TD.getDoubleAlignment()));
+
+ // Replace malloc and free instructions with library calls.
+ // Do this after tracing until lli implements these lib calls.
+ // For now, it will emulate malloc and free internally.
+ PM.add(createLowerAllocationsPass());
+
+ // FIXME: implement the switch instruction in the instruction selector.
+ PM.add(createLowerSwitchPass());
+
+ // FIXME: implement the invoke/unwind instructions!
+ PM.add(createLowerInvokePass());
+
+ // decompose multi-dimensional array references into single-dim refs
+ PM.add(createDecomposeMultiDimRefsPass());
+
+ // Construct and initialize the MachineFunction object for this fn.
+ PM.add(createMachineCodeConstructionPass(*this));
+
+ PM.add(createInstructionSelectionPass(*this));
+
+ // new pass: convert Value* in MachineOperand to an unsigned register
+ // this brings it in line with what the X86 JIT's RegisterAllocator expects
+ //PM.add(createAddRegNumToValuesPass());
+
+ PM.add(getRegisterAllocator(*this));
+ PM.add(getPrologEpilogInsertionPass());
+
+ if (!DisablePeephole)
+ PM.add(createPeepholeOptsPass(*this));
- // Emit bytecode to the sparc assembly file into its special section next
- PM.add(getEmitBytecodeToAsmPass(Out));
+ return false; // success!
}
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