mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 03:29:40 +00:00
05b15fb075
(16) into certain areas of the SPARC V9 back-end. I'm fairly sure the US IIIi's dcache has 32-byte lines, so I'm not sure where the 16 came from. However, in the interest of not breaking things any more than they already are, I'm going to leave the constant alone. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12043 91177308-0d34-0410-b5e6-96231b3b80d8
382 lines
12 KiB
C++
382 lines
12 KiB
C++
//===-- MachineFunction.cpp -----------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Collect native machine code information for a function. This allows
|
|
// target-specific information about the generated code to be stored with each
|
|
// function.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
#include "llvm/CodeGen/SSARegMap.h"
|
|
#include "llvm/CodeGen/MachineFunctionInfo.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
#include "llvm/CodeGen/MachineConstantPool.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetFrameInfo.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/iOther.h"
|
|
using namespace llvm;
|
|
|
|
static AnnotationID MF_AID(
|
|
AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
|
|
|
|
|
|
namespace {
|
|
struct Printer : public MachineFunctionPass {
|
|
std::ostream *OS;
|
|
const std::string Banner;
|
|
|
|
Printer (std::ostream *_OS, const std::string &_Banner) :
|
|
OS (_OS), Banner (_Banner) { }
|
|
|
|
const char *getPassName() const { return "MachineFunction Printer"; }
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
bool runOnMachineFunction(MachineFunction &MF) {
|
|
(*OS) << Banner;
|
|
MF.print (*OS);
|
|
return false;
|
|
}
|
|
};
|
|
}
|
|
|
|
/// Returns a newly-created MachineFunction Printer pass. The default output
|
|
/// stream is std::cerr; the default banner is empty.
|
|
///
|
|
FunctionPass *llvm::createMachineFunctionPrinterPass(std::ostream *OS,
|
|
const std::string &Banner) {
|
|
return new Printer(OS, Banner);
|
|
}
|
|
|
|
namespace {
|
|
struct Deleter : public MachineFunctionPass {
|
|
const char *getPassName() const { return "Machine Code Deleter"; }
|
|
|
|
bool runOnMachineFunction(MachineFunction &MF) {
|
|
// Delete the annotation from the function now.
|
|
MachineFunction::destruct(MF.getFunction());
|
|
return true;
|
|
}
|
|
};
|
|
}
|
|
|
|
/// MachineCodeDeletion Pass - This pass deletes all of the machine code for
|
|
/// the current function, which should happen after the function has been
|
|
/// emitted to a .s file or to memory.
|
|
FunctionPass *llvm::createMachineCodeDeleter() {
|
|
return new Deleter();
|
|
}
|
|
|
|
|
|
|
|
//===---------------------------------------------------------------------===//
|
|
// MachineFunction implementation
|
|
//===---------------------------------------------------------------------===//
|
|
|
|
MachineFunction::MachineFunction(const Function *F,
|
|
const TargetMachine &TM)
|
|
: Annotation(MF_AID), Fn(F), Target(TM) {
|
|
SSARegMapping = new SSARegMap();
|
|
MFInfo = new MachineFunctionInfo(*this);
|
|
FrameInfo = new MachineFrameInfo();
|
|
ConstantPool = new MachineConstantPool();
|
|
}
|
|
|
|
MachineFunction::~MachineFunction() {
|
|
delete SSARegMapping;
|
|
delete MFInfo;
|
|
delete FrameInfo;
|
|
delete ConstantPool;
|
|
}
|
|
|
|
void MachineFunction::dump() const { print(std::cerr); }
|
|
|
|
void MachineFunction::print(std::ostream &OS) const {
|
|
OS << "\n" << *(Value*)Fn->getFunctionType() << " \"" << Fn->getName()
|
|
<< "\"\n";
|
|
|
|
// Print Frame Information
|
|
getFrameInfo()->print(*this, OS);
|
|
|
|
// Print Constant Pool
|
|
getConstantPool()->print(OS);
|
|
|
|
for (const_iterator BB = begin(); BB != end(); ++BB)
|
|
BB->print(OS);
|
|
OS << "\nEnd function \"" << Fn->getName() << "\"\n\n";
|
|
}
|
|
|
|
// The next two methods are used to construct and to retrieve
|
|
// the MachineCodeForFunction object for the given function.
|
|
// construct() -- Allocates and initializes for a given function and target
|
|
// get() -- Returns a handle to the object.
|
|
// This should not be called before "construct()"
|
|
// for a given Function.
|
|
//
|
|
MachineFunction&
|
|
MachineFunction::construct(const Function *Fn, const TargetMachine &Tar)
|
|
{
|
|
assert(Fn->getAnnotation(MF_AID) == 0 &&
|
|
"Object already exists for this function!");
|
|
MachineFunction* mcInfo = new MachineFunction(Fn, Tar);
|
|
Fn->addAnnotation(mcInfo);
|
|
return *mcInfo;
|
|
}
|
|
|
|
void MachineFunction::destruct(const Function *Fn) {
|
|
bool Deleted = Fn->deleteAnnotation(MF_AID);
|
|
assert(Deleted && "Machine code did not exist for function!");
|
|
}
|
|
|
|
MachineFunction& MachineFunction::get(const Function *F)
|
|
{
|
|
MachineFunction *mc = (MachineFunction*)F->getAnnotation(MF_AID);
|
|
assert(mc && "Call construct() method first to allocate the object");
|
|
return *mc;
|
|
}
|
|
|
|
void MachineFunction::clearSSARegMap() {
|
|
delete SSARegMapping;
|
|
SSARegMapping = 0;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// MachineFrameInfo implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// CreateStackObject - Create a stack object for a value of the specified type.
|
|
///
|
|
int MachineFrameInfo::CreateStackObject(const Type *Ty, const TargetData &TD) {
|
|
return CreateStackObject(TD.getTypeSize(Ty), TD.getTypeAlignment(Ty));
|
|
}
|
|
|
|
int MachineFrameInfo::CreateStackObject(const TargetRegisterClass *RC) {
|
|
return CreateStackObject(RC->getSize(), RC->getAlignment());
|
|
}
|
|
|
|
|
|
void MachineFrameInfo::print(const MachineFunction &MF, std::ostream &OS) const{
|
|
int ValOffset = MF.getTarget().getFrameInfo().getOffsetOfLocalArea();
|
|
|
|
for (unsigned i = 0, e = Objects.size(); i != e; ++i) {
|
|
const StackObject &SO = Objects[i];
|
|
OS << " <fi #" << (int)(i-NumFixedObjects) << "> is ";
|
|
if (SO.Size == 0)
|
|
OS << "variable sized";
|
|
else
|
|
OS << SO.Size << " byte" << (SO.Size != 1 ? "s" : " ");
|
|
|
|
if (i < NumFixedObjects)
|
|
OS << " fixed";
|
|
if (i < NumFixedObjects || SO.SPOffset != -1) {
|
|
int Off = SO.SPOffset + ValOffset;
|
|
OS << " at location [SP";
|
|
if (Off > 0)
|
|
OS << "+" << Off;
|
|
else if (Off < 0)
|
|
OS << Off;
|
|
OS << "]";
|
|
}
|
|
OS << "\n";
|
|
}
|
|
|
|
if (HasVarSizedObjects)
|
|
OS << " Stack frame contains variable sized objects\n";
|
|
}
|
|
|
|
void MachineFrameInfo::dump(const MachineFunction &MF) const {
|
|
print(MF, std::cerr);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// MachineConstantPool implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void MachineConstantPool::print(std::ostream &OS) const {
|
|
for (unsigned i = 0, e = Constants.size(); i != e; ++i)
|
|
OS << " <cp #" << i << "> is" << *(Value*)Constants[i] << "\n";
|
|
}
|
|
|
|
void MachineConstantPool::dump() const { print(std::cerr); }
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// MachineFunctionInfo implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static unsigned
|
|
ComputeMaxOptionalArgsSize(const TargetMachine& target, const Function *F,
|
|
unsigned &maxOptionalNumArgs)
|
|
{
|
|
const TargetFrameInfo &frameInfo = target.getFrameInfo();
|
|
|
|
unsigned maxSize = 0;
|
|
|
|
for (Function::const_iterator BB = F->begin(), BBE = F->end(); BB !=BBE; ++BB)
|
|
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
|
|
if (const CallInst *callInst = dyn_cast<CallInst>(I))
|
|
{
|
|
unsigned numOperands = callInst->getNumOperands() - 1;
|
|
int numExtra = (int)numOperands-frameInfo.getNumFixedOutgoingArgs();
|
|
if (numExtra <= 0)
|
|
continue;
|
|
|
|
unsigned sizeForThisCall;
|
|
if (frameInfo.argsOnStackHaveFixedSize())
|
|
{
|
|
int argSize = frameInfo.getSizeOfEachArgOnStack();
|
|
sizeForThisCall = numExtra * (unsigned) argSize;
|
|
}
|
|
else
|
|
{
|
|
assert(0 && "UNTESTED CODE: Size per stack argument is not "
|
|
"fixed on this architecture: use actual arg sizes to "
|
|
"compute MaxOptionalArgsSize");
|
|
sizeForThisCall = 0;
|
|
for (unsigned i = 0; i < numOperands; ++i)
|
|
sizeForThisCall += target.getTargetData().getTypeSize(callInst->
|
|
getOperand(i)->getType());
|
|
}
|
|
|
|
if (maxSize < sizeForThisCall)
|
|
maxSize = sizeForThisCall;
|
|
|
|
if ((int)maxOptionalNumArgs < numExtra)
|
|
maxOptionalNumArgs = (unsigned) numExtra;
|
|
}
|
|
|
|
return maxSize;
|
|
}
|
|
|
|
// Align data larger than one L1 cache line on L1 cache line boundaries.
|
|
// Align all smaller data on the next higher 2^x boundary (4, 8, ...),
|
|
// but not higher than the alignment of the largest type we support
|
|
// (currently a double word). -- see class TargetData).
|
|
//
|
|
// This function is similar to the corresponding function in EmitAssembly.cpp
|
|
// but they are unrelated. This one does not align at more than a
|
|
// double-word boundary whereas that one might.
|
|
//
|
|
inline unsigned
|
|
SizeToAlignment(unsigned size, const TargetMachine& target)
|
|
{
|
|
const unsigned short cacheLineSize = 16;
|
|
if (size > (unsigned) cacheLineSize / 2)
|
|
return cacheLineSize;
|
|
else
|
|
for (unsigned sz=1; /*no condition*/; sz *= 2)
|
|
if (sz >= size || sz >= target.getTargetData().getDoubleAlignment())
|
|
return sz;
|
|
}
|
|
|
|
|
|
void MachineFunctionInfo::CalculateArgSize() {
|
|
maxOptionalArgsSize = ComputeMaxOptionalArgsSize(MF.getTarget(),
|
|
MF.getFunction(),
|
|
maxOptionalNumArgs);
|
|
staticStackSize = maxOptionalArgsSize
|
|
+ MF.getTarget().getFrameInfo().getMinStackFrameSize();
|
|
}
|
|
|
|
int
|
|
MachineFunctionInfo::computeOffsetforLocalVar(const Value* val,
|
|
unsigned &getPaddedSize,
|
|
unsigned sizeToUse)
|
|
{
|
|
if (sizeToUse == 0)
|
|
sizeToUse = MF.getTarget().findOptimalStorageSize(val->getType());
|
|
unsigned align = SizeToAlignment(sizeToUse, MF.getTarget());
|
|
|
|
bool growUp;
|
|
int firstOffset = MF.getTarget().getFrameInfo().getFirstAutomaticVarOffset(MF,
|
|
growUp);
|
|
int offset = growUp? firstOffset + getAutomaticVarsSize()
|
|
: firstOffset - (getAutomaticVarsSize() + sizeToUse);
|
|
|
|
int aligned = MF.getTarget().getFrameInfo().adjustAlignment(offset, growUp, align);
|
|
getPaddedSize = sizeToUse + abs(aligned - offset);
|
|
|
|
return aligned;
|
|
}
|
|
|
|
|
|
int MachineFunctionInfo::allocateLocalVar(const Value* val,
|
|
unsigned sizeToUse) {
|
|
assert(! automaticVarsAreaFrozen &&
|
|
"Size of auto vars area has been used to compute an offset so "
|
|
"no more automatic vars should be allocated!");
|
|
|
|
// Check if we've allocated a stack slot for this value already
|
|
//
|
|
hash_map<const Value*, int>::const_iterator pair = offsets.find(val);
|
|
if (pair != offsets.end())
|
|
return pair->second;
|
|
|
|
unsigned getPaddedSize;
|
|
unsigned offset = computeOffsetforLocalVar(val, getPaddedSize, sizeToUse);
|
|
offsets[val] = offset;
|
|
incrementAutomaticVarsSize(getPaddedSize);
|
|
return offset;
|
|
}
|
|
|
|
int
|
|
MachineFunctionInfo::allocateSpilledValue(const Type* type)
|
|
{
|
|
assert(! spillsAreaFrozen &&
|
|
"Size of reg spills area has been used to compute an offset so "
|
|
"no more register spill slots should be allocated!");
|
|
|
|
unsigned size = MF.getTarget().getTargetData().getTypeSize(type);
|
|
unsigned char align = MF.getTarget().getTargetData().getTypeAlignment(type);
|
|
|
|
bool growUp;
|
|
int firstOffset = MF.getTarget().getFrameInfo().getRegSpillAreaOffset(MF, growUp);
|
|
|
|
int offset = growUp? firstOffset + getRegSpillsSize()
|
|
: firstOffset - (getRegSpillsSize() + size);
|
|
|
|
int aligned = MF.getTarget().getFrameInfo().adjustAlignment(offset, growUp, align);
|
|
size += abs(aligned - offset); // include alignment padding in size
|
|
|
|
incrementRegSpillsSize(size); // update size of reg. spills area
|
|
|
|
return aligned;
|
|
}
|
|
|
|
int
|
|
MachineFunctionInfo::pushTempValue(unsigned size)
|
|
{
|
|
unsigned align = SizeToAlignment(size, MF.getTarget());
|
|
|
|
bool growUp;
|
|
int firstOffset = MF.getTarget().getFrameInfo().getTmpAreaOffset(MF, growUp);
|
|
|
|
int offset = growUp? firstOffset + currentTmpValuesSize
|
|
: firstOffset - (currentTmpValuesSize + size);
|
|
|
|
int aligned = MF.getTarget().getFrameInfo().adjustAlignment(offset, growUp,
|
|
align);
|
|
size += abs(aligned - offset); // include alignment padding in size
|
|
|
|
incrementTmpAreaSize(size); // update "current" size of tmp area
|
|
|
|
return aligned;
|
|
}
|
|
|
|
void MachineFunctionInfo::popAllTempValues() {
|
|
resetTmpAreaSize(); // clear tmp area to reuse
|
|
}
|
|
|