//===-- 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"
-#include "llvm/Type.h"
-#include "Support/LeakDetector.h"
+#include "llvm/Instructions.h"
+#include "llvm/Support/LeakDetector.h"
+#include "llvm/Support/GraphWriter.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();
BasicBlocks.Parent = this;
}
-MachineFunction::~MachineFunction() {
+MachineFunction::~MachineFunction() {
BasicBlocks.clear();
delete SSARegMapping;
delete MFInfo;
delete FrameInfo;
delete ConstantPool;
+ delete[] UsedPhysRegs;
}
void MachineFunction::dump() const { print(std::cerr); }
// Print Constant Pool
getConstantPool()->print(OS);
-
+
for (const_iterator BB = begin(); BB != end(); ++BB)
BB->print(OS);
OS << "\n# End machine code for " << Fn->getName () << "().\n\n";
}
+/// CFGOnly flag - This is used to control whether or not the CFG graph printer
+/// prints out the contents of basic blocks or not. This is acceptable because
+/// this code is only really used for debugging purposes.
+///
+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";
+ }
+
+ 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();
+ }
+
+ Node->print(Out);
+
+ 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;
+ }
+ };
+}
+
+void MachineFunction::viewCFG() const
+{
+ 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;
+ }
+
+ WriteGraph(F, this);
+ F.close();
+ std::cerr << "\n";
+
+ std::cerr << "Running 'dot' program... " << std::flush;
+ if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
+ + " > /tmp/cfg.tempgraph.ps").c_str())) {
+ std::cerr << "Error running dot: 'dot' not in path?\n";
+ } else {
+ std::cerr << "\n";
+ system("gv /tmp/cfg.tempgraph.ps");
+ }
+ system(("rm " + Filename + " /tmp/cfg.tempgraph.ps").c_str());
+}
+
+void MachineFunction::viewCFGOnly() const
+{
+ CFGOnly = true;
+ viewCFG();
+ CFGOnly = false;
+}
+
// 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)
{
/// 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());
+ return CreateStackObject((unsigned)TD.getTypeSize(Ty),
+ TD.getTypeAlignment(Ty));
}
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;
+ OS << "+" << Off;
else if (Off < 0)
- OS << Off;
+ OS << Off;
OS << "]";
}
OS << "\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) {
- // 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);
-
- 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
-}
-
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