//===-- 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/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"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
-#include "llvm/Type.h"
-#include "../Target/SparcV9/MachineFunctionInfo.h" // FIXME
-#include "Support/LeakDetector.h"
-#include "Support/GraphWriter.h"
+#include "llvm/Support/LeakDetector.h"
+#include "llvm/Support/GraphWriter.h"
+#include "llvm/Config/config.h"
#include <fstream>
#include <iostream>
#include <sstream>
using namespace llvm;
static AnnotationID MF_AID(
- AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
+ AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
namespace {
/// stream is std::cerr; the default banner is empty.
///
FunctionPass *llvm::createMachineFunctionPrinterPass(std::ostream *OS,
- const std::string &Banner) {
+ const std::string &Banner){
return new Printer(OS, Banner);
}
//===---------------------------------------------------------------------===//
// MachineFunction implementation
//===---------------------------------------------------------------------===//
-MachineBasicBlock* ilist_traits<MachineBasicBlock>::createNode()
-{
- MachineBasicBlock* dummy = new MachineBasicBlock();
- LeakDetector::removeGarbageObject(dummy);
- return dummy;
+
+MachineBasicBlock* ilist_traits<MachineBasicBlock>::createSentinel() {
+ MachineBasicBlock* dummy = new MachineBasicBlock();
+ LeakDetector::removeGarbageObject(dummy);
+ return dummy;
}
void ilist_traits<MachineBasicBlock>::transferNodesFromList(
- iplist<MachineBasicBlock, ilist_traits<MachineBasicBlock> >& toList,
- ilist_iterator<MachineBasicBlock> first,
- ilist_iterator<MachineBasicBlock> last)
-{
- if (Parent != toList.Parent)
- for (; first != last; ++first)
- first->Parent = toList.Parent;
+ iplist<MachineBasicBlock, ilist_traits<MachineBasicBlock> >& toList,
+ ilist_iterator<MachineBasicBlock> first,
+ ilist_iterator<MachineBasicBlock> last) {
+ if (Parent != toList.Parent)
+ for (; first != last; ++first)
+ first->Parent = toList.Parent;
}
MachineFunction::MachineFunction(const Function *F,
const TargetMachine &TM)
- : Annotation(MF_AID), Fn(F), Target(TM) {
+ : Annotation(MF_AID), Fn(F), Target(TM), UsedPhysRegs(0) {
SSARegMapping = new SSARegMap();
- MFInfo = new MachineFunctionInfo(*this);
+ MFInfo = 0;
FrameInfo = new MachineFrameInfo();
- ConstantPool = new MachineConstantPool();
+ ConstantPool = new MachineConstantPool(TM.getTargetData());
+ JumpTableInfo = new MachineJumpTableInfo(TM.getTargetData());
BasicBlocks.Parent = this;
}
-MachineFunction::~MachineFunction() {
+MachineFunction::~MachineFunction() {
BasicBlocks.clear();
delete SSARegMapping;
delete MFInfo;
delete FrameInfo;
delete ConstantPool;
+ delete JumpTableInfo;
+ delete[] UsedPhysRegs;
}
void MachineFunction::dump() const { print(std::cerr); }
// Print Frame Information
getFrameInfo()->print(*this, OS);
+
+ // Print JumpTable Information
+ getJumpTableInfo()->print(OS);
// Print Constant Pool
getConstantPool()->print(OS);
+ const MRegisterInfo *MRI = getTarget().getRegisterInfo();
+
+ if (livein_begin() != livein_end()) {
+ OS << "Live Ins:";
+ for (livein_iterator I = livein_begin(), E = livein_end(); I != E; ++I) {
+ if (MRI)
+ OS << " " << MRI->getName(I->first);
+ else
+ OS << " Reg #" << I->first;
+ }
+ OS << "\n";
+ }
+ if (liveout_begin() != liveout_end()) {
+ OS << "Live Outs:";
+ for (liveout_iterator I = liveout_begin(), E = liveout_end(); I != E; ++I)
+ if (MRI)
+ OS << " " << MRI->getName(*I);
+ else
+ OS << " Reg #" << *I;
+ OS << "\n";
+ }
+
for (const_iterator BB = begin(); BB != end(); ++BB)
BB->print(OS);
static bool CFGOnly = false;
namespace llvm {
-template<>
-struct DOTGraphTraits<const MachineFunction*> : public DefaultDOTGraphTraits {
- static std::string getGraphName(const MachineFunction *F) {
- return "CFG for '" + F->getFunction()->getName() + "' function";
- }
+ template<>
+ struct DOTGraphTraits<const MachineFunction*> : public DefaultDOTGraphTraits {
+ static std::string getGraphName(const MachineFunction *F) {
+ return "CFG for '" + F->getFunction()->getName() + "' function";
+ }
- static std::string getNodeLabel(const MachineBasicBlock *Node,
- const MachineFunction *Graph) {
- if (CFGOnly && Node->getBasicBlock() &&
- !Node->getBasicBlock()->getName().empty())
- return Node->getBasicBlock()->getName() + ":";
+ static std::string getNodeLabel(const MachineBasicBlock *Node,
+ const MachineFunction *Graph) {
+ if (CFGOnly && Node->getBasicBlock() &&
+ !Node->getBasicBlock()->getName().empty())
+ return Node->getBasicBlock()->getName() + ":";
- std::ostringstream Out;
- if (CFGOnly) {
- Out << Node->getNumber() << ':';
- return Out.str();
- }
+ std::ostringstream Out;
+ if (CFGOnly) {
+ Out << Node->getNumber() << ':';
+ return Out.str();
+ }
- Node->print(Out);
+ Node->print(Out);
- std::string OutStr = Out.str();
- if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
+ std::string OutStr = Out.str();
+ if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
- // Process string output to make it nicer...
- for (unsigned i = 0; i != OutStr.length(); ++i)
- if (OutStr[i] == '\n') { // Left justify
- OutStr[i] = '\\';
- OutStr.insert(OutStr.begin()+i+1, 'l');
- }
- return OutStr;
- }
-};
+ // Process string output to make it nicer...
+ for (unsigned i = 0; i != OutStr.length(); ++i)
+ if (OutStr[i] == '\n') { // Left justify
+ OutStr[i] = '\\';
+ OutStr.insert(OutStr.begin()+i+1, 'l');
+ }
+ return OutStr;
+ }
+ };
}
void MachineFunction::viewCFG() const
{
+#ifndef NDEBUG
std::string Filename = "/tmp/cfg." + getFunction()->getName() + ".dot";
std::cerr << "Writing '" << Filename << "'... ";
std::ofstream F(Filename.c_str());
-
+
if (!F) {
std::cerr << " error opening file for writing!\n";
return;
F.close();
std::cerr << "\n";
+#ifdef HAVE_GRAPHVIZ
+ std::cerr << "Running 'Graphviz' program... " << std::flush;
+ if (system((LLVM_PATH_GRAPHVIZ " " + Filename).c_str())) {
+ std::cerr << "Error viewing graph: 'Graphviz' not in path?\n";
+ } else {
+ system(("rm " + Filename).c_str());
+ return;
+ }
+#endif // HAVE_GRAPHVIZ
+
+#ifdef HAVE_GV
std::cerr << "Running 'dot' program... " << std::flush;
if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
+ " > /tmp/cfg.tempgraph.ps").c_str())) {
system("gv /tmp/cfg.tempgraph.ps");
}
system(("rm " + Filename + " /tmp/cfg.tempgraph.ps").c_str());
+ return;
+#endif // HAVE_GV
+#endif // NDEBUG
+ std::cerr << "MachineFunction::viewCFG is only available in debug builds on "
+ << "systems with Graphviz or gv!\n";
+
+#ifndef NDEBUG
+ system(("rm " + Filename).c_str());
+#endif
}
void MachineFunction::viewCFGOnly() const
// 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)
{
// 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));
-}
-
-
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 ";
+ OS << " <fi #" << (int)(i-NumFixedObjects) << ">: ";
if (SO.Size == 0)
OS << "variable sized";
else
- OS << SO.Size << " byte" << (SO.Size != 1 ? "s" : " ");
-
+ OS << "size is " << SO.Size << " byte" << (SO.Size != 1 ? "s," : ",");
+ OS << " alignment is " << SO.Alignment << " byte"
+ << (SO.Alignment != 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;
+ OS << "+" << Off;
else if (Off < 0)
- OS << Off;
+ OS << Off;
OS << "]";
}
OS << "\n";
//===----------------------------------------------------------------------===//
-// MachineConstantPool implementation
+// MachineJumpTableInfo 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";
+/// 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 MachineConstantPool::dump() const { print(std::cerr); }
-//===----------------------------------------------------------------------===//
-// MachineFunctionInfo implementation
-// NOTE: MachineFunctionInfo and its methods are specific to the SparcV9
-// target - don't use them in other targets.
-//===----------------------------------------------------------------------===//
-
-static unsigned
-ComputeMaxOptionalArgsSize(const TargetMachine& target, const Function *F,
- unsigned &maxOptionalNumArgs)
-{
- 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 = numOperands-6;
- if (numExtra <= 0)
- continue;
-
- unsigned sizeForThisCall = numExtra * 8;
-
- if (maxSize < sizeForThisCall)
- maxSize = sizeForThisCall;
-
- if ((int)maxOptionalNumArgs < numExtra)
- maxOptionalNumArgs = (unsigned) numExtra;
- }
-
- return maxSize;
+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";
+ }
}
-// 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;
+unsigned MachineJumpTableInfo::getEntrySize() const {
+ return TD->getPointerSize();
}
-
-void MachineFunctionInfo::CalculateArgSize() {
- maxOptionalArgsSize = ComputeMaxOptionalArgsSize(MF.getTarget(),
- MF.getFunction(),
- maxOptionalNumArgs);
- staticStackSize = maxOptionalArgsSize + 176;
+unsigned MachineJumpTableInfo::getAlignment() const {
+ return TD->getPointerAlignment();
}
-int
-MachineFunctionInfo::computeOffsetforLocalVar(const Value* val,
- unsigned &getPaddedSize,
- unsigned sizeToUse)
-{
- if (sizeToUse == 0) {
- // All integer types smaller than ints promote to 4 byte integers.
- if (val->getType()->isIntegral() && val->getType()->getPrimitiveSize() < 4)
- sizeToUse = 4;
- else
- sizeToUse = MF.getTarget().getTargetData().getTypeSize(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);
+void MachineJumpTableInfo::dump() const { print(std::cerr); }
- 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;
-}
+//===----------------------------------------------------------------------===//
+// MachineConstantPool implementation
+//===----------------------------------------------------------------------===//
-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);
+/// getConstantPoolIndex - Create a new entry in the constant pool or return
+/// an existing one. User must specify an alignment in bytes for the object.
+///
+unsigned MachineConstantPool::getConstantPoolIndex(Constant *C,
+ unsigned Alignment) {
+ assert(Alignment && "Alignment must be specified!");
+ if (Alignment > PoolAlignment) PoolAlignment = Alignment;
- bool growUp;
- int firstOffset = MF.getTarget().getFrameInfo()->getRegSpillAreaOffset(MF, growUp);
+ // Check to see if we already have this constant.
+ //
+ // FIXME, this could be made much more efficient for large constant pools.
+ unsigned AlignMask = (1 << Alignment)-1;
+ for (unsigned i = 0, e = Constants.size(); i != e; ++i)
+ if (Constants[i].Val == C && (Constants[i].Offset & AlignMask) == 0)
+ return i;
- 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
+ unsigned Offset = 0;
+ if (!Constants.empty()) {
+ Offset = Constants.back().Offset;
+ Offset += TD->getTypeSize(Constants.back().Val->getType());
+ Offset = (Offset+AlignMask)&~AlignMask;
+ }
- incrementRegSpillsSize(size); // update size of reg. spills area
-
- return aligned;
+ Constants.push_back(MachineConstantPoolEntry(C, Offset));
+ return Constants.size()-1;
}
-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 MachineConstantPool::print(std::ostream &OS) const {
+ for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
+ OS << " <cp #" << i << "> is" << *(Value*)Constants[i].Val;
+ OS << " , offset=" << Constants[i].Offset;
+ OS << "\n";
+ }
}
-void MachineFunctionInfo::popAllTempValues() {
- resetTmpAreaSize(); // clear tmp area to reuse
-}
+void MachineConstantPool::dump() const { print(std::cerr); }
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