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-rw-r--r--lib/CodeGen/MachineFunction.cpp313
1 files changed, 173 insertions, 140 deletions
diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index 599efb8..b0ec809 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -19,6 +19,7 @@
#include "llvm/ADT/STLExtras.h"
#include "llvm/Config/config.h"
#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
@@ -32,89 +33,56 @@
#include "llvm/Support/Compiler.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/raw_ostream.h"
-#include <fstream>
-#include <sstream>
using namespace llvm;
-bool MachineFunctionPass::runOnFunction(Function &F) {
- // Do not codegen any 'available_externally' functions at all, they have
- // definitions outside the translation unit.
- if (F.hasAvailableExternallyLinkage())
- return false;
-
- return runOnMachineFunction(MachineFunction::get(&F));
-}
-
namespace {
struct VISIBILITY_HIDDEN Printer : public MachineFunctionPass {
static char ID;
- std::ostream *OS;
+ raw_ostream &OS;
const std::string Banner;
- Printer (std::ostream *os, const std::string &banner)
+ Printer(raw_ostream &os, const std::string &banner)
: MachineFunctionPass(&ID), OS(os), Banner(banner) {}
const char *getPassName() const { return "MachineFunction Printer"; }
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
+ MachineFunctionPass::getAnalysisUsage(AU);
}
bool runOnMachineFunction(MachineFunction &MF) {
- (*OS) << Banner;
- MF.print (*OS);
+ OS << Banner;
+ MF.print(OS);
return false;
}
};
char Printer::ID = 0;
}
-/// Returns a newly-created MachineFunction Printer pass. The default output
-/// stream is std::cerr; the default banner is empty.
+/// Returns a newly-created MachineFunction Printer pass. The default banner is
+/// empty.
///
-FunctionPass *llvm::createMachineFunctionPrinterPass(std::ostream *OS,
+FunctionPass *llvm::createMachineFunctionPrinterPass(raw_ostream &OS,
const std::string &Banner){
return new Printer(OS, Banner);
}
-namespace {
- struct VISIBILITY_HIDDEN Deleter : public MachineFunctionPass {
- static char ID;
- Deleter() : MachineFunctionPass(&ID) {}
-
- 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;
- }
- };
- char Deleter::ID = 0;
-}
-
-/// 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
//===---------------------------------------------------------------------===//
+// Out of line virtual method.
+MachineFunctionInfo::~MachineFunctionInfo() {}
+
void ilist_traits<MachineBasicBlock>::deleteNode(MachineBasicBlock *MBB) {
MBB->getParent()->DeleteMachineBasicBlock(MBB);
}
-MachineFunction::MachineFunction(const Function *F,
+MachineFunction::MachineFunction(Function *F,
const TargetMachine &TM)
- : Annotation(AnnotationManager::getID("CodeGen::MachineCodeForFunction")),
- Fn(F), Target(TM) {
+ : Fn(F), Target(TM) {
if (TM.getRegisterInfo())
RegInfo = new (Allocator.Allocate<MachineRegisterInfo>())
MachineRegisterInfo(*TM.getRegisterInfo());
@@ -131,7 +99,8 @@ MachineFunction::MachineFunction(const Function *F,
const TargetData &TD = *TM.getTargetData();
bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
unsigned EntrySize = IsPic ? 4 : TD.getPointerSize();
- unsigned TyAlignment = IsPic ? TD.getABITypeAlignment(Type::Int32Ty)
+ unsigned TyAlignment = IsPic ?
+ TD.getABITypeAlignment(Type::getInt32Ty(F->getContext()))
: TD.getPointerABIAlignment();
JumpTableInfo = new (Allocator.Allocate<MachineJumpTableInfo>())
MachineJumpTableInfo(EntrySize, TyAlignment);
@@ -221,11 +190,6 @@ MachineFunction::CloneMachineInstr(const MachineInstr *Orig) {
///
void
MachineFunction::DeleteMachineInstr(MachineInstr *MI) {
- // Clear the instructions memoperands. This must be done manually because
- // the instruction's parent pointer is now null, so it can't properly
- // deallocate them on its own.
- MI->clearMemOperands(*this);
-
MI->~MachineInstr();
InstructionRecycler.Deallocate(Allocator, MI);
}
@@ -248,12 +212,99 @@ MachineFunction::DeleteMachineBasicBlock(MachineBasicBlock *MBB) {
BasicBlockRecycler.Deallocate(Allocator, MBB);
}
+MachineMemOperand *
+MachineFunction::getMachineMemOperand(const Value *v, unsigned f,
+ int64_t o, uint64_t s,
+ unsigned base_alignment) {
+ return new (Allocator.Allocate<MachineMemOperand>())
+ MachineMemOperand(v, f, o, s, base_alignment);
+}
+
+MachineMemOperand *
+MachineFunction::getMachineMemOperand(const MachineMemOperand *MMO,
+ int64_t Offset, uint64_t Size) {
+ return new (Allocator.Allocate<MachineMemOperand>())
+ MachineMemOperand(MMO->getValue(), MMO->getFlags(),
+ int64_t(uint64_t(MMO->getOffset()) +
+ uint64_t(Offset)),
+ Size, MMO->getBaseAlignment());
+}
+
+MachineInstr::mmo_iterator
+MachineFunction::allocateMemRefsArray(unsigned long Num) {
+ return Allocator.Allocate<MachineMemOperand *>(Num);
+}
+
+std::pair<MachineInstr::mmo_iterator, MachineInstr::mmo_iterator>
+MachineFunction::extractLoadMemRefs(MachineInstr::mmo_iterator Begin,
+ MachineInstr::mmo_iterator End) {
+ // Count the number of load mem refs.
+ unsigned Num = 0;
+ for (MachineInstr::mmo_iterator I = Begin; I != End; ++I)
+ if ((*I)->isLoad())
+ ++Num;
+
+ // Allocate a new array and populate it with the load information.
+ MachineInstr::mmo_iterator Result = allocateMemRefsArray(Num);
+ unsigned Index = 0;
+ for (MachineInstr::mmo_iterator I = Begin; I != End; ++I) {
+ if ((*I)->isLoad()) {
+ if (!(*I)->isStore())
+ // Reuse the MMO.
+ Result[Index] = *I;
+ else {
+ // Clone the MMO and unset the store flag.
+ MachineMemOperand *JustLoad =
+ getMachineMemOperand((*I)->getValue(),
+ (*I)->getFlags() & ~MachineMemOperand::MOStore,
+ (*I)->getOffset(), (*I)->getSize(),
+ (*I)->getBaseAlignment());
+ Result[Index] = JustLoad;
+ }
+ ++Index;
+ }
+ }
+ return std::make_pair(Result, Result + Num);
+}
+
+std::pair<MachineInstr::mmo_iterator, MachineInstr::mmo_iterator>
+MachineFunction::extractStoreMemRefs(MachineInstr::mmo_iterator Begin,
+ MachineInstr::mmo_iterator End) {
+ // Count the number of load mem refs.
+ unsigned Num = 0;
+ for (MachineInstr::mmo_iterator I = Begin; I != End; ++I)
+ if ((*I)->isStore())
+ ++Num;
+
+ // Allocate a new array and populate it with the store information.
+ MachineInstr::mmo_iterator Result = allocateMemRefsArray(Num);
+ unsigned Index = 0;
+ for (MachineInstr::mmo_iterator I = Begin; I != End; ++I) {
+ if ((*I)->isStore()) {
+ if (!(*I)->isLoad())
+ // Reuse the MMO.
+ Result[Index] = *I;
+ else {
+ // Clone the MMO and unset the load flag.
+ MachineMemOperand *JustStore =
+ getMachineMemOperand((*I)->getValue(),
+ (*I)->getFlags() & ~MachineMemOperand::MOLoad,
+ (*I)->getOffset(), (*I)->getSize(),
+ (*I)->getBaseAlignment());
+ Result[Index] = JustStore;
+ }
+ ++Index;
+ }
+ }
+ return std::make_pair(Result, Result + Num);
+}
+
void MachineFunction::dump() const {
- print(*cerr.stream());
+ print(errs());
}
-void MachineFunction::print(std::ostream &OS) const {
- OS << "# Machine code for " << Fn->getName () << "():\n";
+void MachineFunction::print(raw_ostream &OS) const {
+ OS << "# Machine code for " << Fn->getName() << "():\n";
// Print Frame Information
FrameInfo->print(*this, OS);
@@ -262,10 +313,7 @@ void MachineFunction::print(std::ostream &OS) const {
JumpTableInfo->print(OS);
// Print Constant Pool
- {
- raw_os_ostream OSS(OS);
- ConstantPool->print(OSS);
- }
+ ConstantPool->print(OS);
const TargetRegisterInfo *TRI = getTarget().getRegisterInfo();
@@ -279,32 +327,32 @@ void MachineFunction::print(std::ostream &OS) const {
OS << " Reg #" << I->first;
if (I->second)
- OS << " in VR#" << I->second << " ";
+ OS << " in VR#" << I->second << ' ';
}
- OS << "\n";
+ OS << '\n';
}
if (RegInfo && !RegInfo->liveout_empty()) {
OS << "Live Outs:";
for (MachineRegisterInfo::liveout_iterator
I = RegInfo->liveout_begin(), E = RegInfo->liveout_end(); I != E; ++I)
if (TRI)
- OS << " " << TRI->getName(*I);
+ OS << ' ' << TRI->getName(*I);
else
OS << " Reg #" << *I;
- OS << "\n";
+ OS << '\n';
}
- for (const_iterator BB = begin(); BB != end(); ++BB)
+ for (const_iterator BB = begin(), E = end(); BB != E; ++BB)
BB->print(OS);
- OS << "\n# End machine code for " << Fn->getName () << "().\n\n";
+ OS << "\n# End machine code for " << Fn->getName() << "().\n\n";
}
namespace llvm {
template<>
struct DOTGraphTraits<const MachineFunction*> : public DefaultDOTGraphTraits {
static std::string getGraphName(const MachineFunction *F) {
- return "CFG for '" + F->getFunction()->getName() + "' function";
+ return "CFG for '" + F->getFunction()->getNameStr() + "' function";
}
static std::string getNodeLabel(const MachineBasicBlock *Node,
@@ -312,17 +360,18 @@ namespace llvm {
bool ShortNames) {
if (ShortNames && Node->getBasicBlock() &&
!Node->getBasicBlock()->getName().empty())
- return Node->getBasicBlock()->getName() + ":";
-
- std::ostringstream Out;
- if (ShortNames) {
- Out << Node->getNumber() << ':';
- return Out.str();
+ return Node->getBasicBlock()->getNameStr() + ":";
+
+ std::string OutStr;
+ {
+ raw_string_ostream OSS(OutStr);
+
+ if (ShortNames)
+ OSS << Node->getNumber() << ':';
+ else
+ Node->print(OSS);
}
- Node->print(Out);
-
- std::string OutStr = Out.str();
if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
// Process string output to make it nicer...
@@ -339,59 +388,23 @@ namespace llvm {
void MachineFunction::viewCFG() const
{
#ifndef NDEBUG
- ViewGraph(this, "mf" + getFunction()->getName());
+ ViewGraph(this, "mf" + getFunction()->getNameStr());
#else
- cerr << "SelectionDAG::viewGraph is only available in debug builds on "
- << "systems with Graphviz or gv!\n";
+ errs() << "SelectionDAG::viewGraph is only available in debug builds on "
+ << "systems with Graphviz or gv!\n";
#endif // NDEBUG
}
void MachineFunction::viewCFGOnly() const
{
#ifndef NDEBUG
- ViewGraph(this, "mf" + getFunction()->getName(), true);
+ ViewGraph(this, "mf" + getFunction()->getNameStr(), true);
#else
- cerr << "SelectionDAG::viewGraph is only available in debug builds on "
- << "systems with Graphviz or gv!\n";
+ errs() << "SelectionDAG::viewGraph is only available in debug builds on "
+ << "systems with Graphviz or gv!\n";
#endif // NDEBUG
}
-// 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)
-{
- AnnotationID MF_AID =
- AnnotationManager::getID("CodeGen::MachineCodeForFunction");
- 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) {
- AnnotationID MF_AID =
- AnnotationManager::getID("CodeGen::MachineCodeForFunction");
- bool Deleted = Fn->deleteAnnotation(MF_AID);
- assert(Deleted && "Machine code did not exist for function!");
- Deleted = Deleted; // silence warning when no assertions.
-}
-
-MachineFunction& MachineFunction::get(const Function *F)
-{
- AnnotationID MF_AID =
- AnnotationManager::getID("CodeGen::MachineCodeForFunction");
- MachineFunction *mc = (MachineFunction*)F->getAnnotation(MF_AID);
- assert(mc && "Call construct() method first to allocate the object");
- return *mc;
-}
-
/// addLiveIn - Add the specified physical register as a live-in value and
/// create a corresponding virtual register for it.
unsigned MachineFunction::addLiveIn(unsigned PReg,
@@ -402,23 +415,6 @@ unsigned MachineFunction::addLiveIn(unsigned PReg,
return VReg;
}
-/// getOrCreateDebugLocID - Look up the DebugLocTuple index with the given
-/// source file, line, and column. If none currently exists, create a new
-/// DebugLocTuple, and insert it into the DebugIdMap.
-unsigned MachineFunction::getOrCreateDebugLocID(GlobalVariable *CompileUnit,
- unsigned Line, unsigned Col) {
- DebugLocTuple Tuple(CompileUnit, Line, Col);
- DenseMap<DebugLocTuple, unsigned>::iterator II
- = DebugLocInfo.DebugIdMap.find(Tuple);
- if (II != DebugLocInfo.DebugIdMap.end())
- return II->second;
- // Add a new tuple.
- unsigned Id = DebugLocInfo.DebugLocations.size();
- DebugLocInfo.DebugLocations.push_back(Tuple);
- DebugLocInfo.DebugIdMap[Tuple] = Id;
- return Id;
-}
-
/// getDebugLocTuple - Get the DebugLocTuple for a given DebugLoc object.
DebugLocTuple MachineFunction::getDebugLocTuple(DebugLoc DL) const {
unsigned Idx = DL.getIndex();
@@ -444,7 +440,38 @@ int MachineFrameInfo::CreateFixedObject(uint64_t Size, int64_t SPOffset,
}
-void MachineFrameInfo::print(const MachineFunction &MF, std::ostream &OS) const{
+BitVector
+MachineFrameInfo::getPristineRegs(const MachineBasicBlock *MBB) const {
+ assert(MBB && "MBB must be valid");
+ const MachineFunction *MF = MBB->getParent();
+ assert(MF && "MBB must be part of a MachineFunction");
+ const TargetMachine &TM = MF->getTarget();
+ const TargetRegisterInfo *TRI = TM.getRegisterInfo();
+ BitVector BV(TRI->getNumRegs());
+
+ // Before CSI is calculated, no registers are considered pristine. They can be
+ // freely used and PEI will make sure they are saved.
+ if (!isCalleeSavedInfoValid())
+ return BV;
+
+ for (const unsigned *CSR = TRI->getCalleeSavedRegs(MF); CSR && *CSR; ++CSR)
+ BV.set(*CSR);
+
+ // The entry MBB always has all CSRs pristine.
+ if (MBB == &MF->front())
+ return BV;
+
+ // On other MBBs the saved CSRs are not pristine.
+ const std::vector<CalleeSavedInfo> &CSI = getCalleeSavedInfo();
+ for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
+ E = CSI.end(); I != E; ++I)
+ BV.reset(I->getReg());
+
+ return BV;
+}
+
+
+void MachineFrameInfo::print(const MachineFunction &MF, raw_ostream &OS) const{
const TargetFrameInfo *FI = MF.getTarget().getFrameInfo();
int ValOffset = (FI ? FI->getOffsetOfLocalArea() : 0);
@@ -481,10 +508,9 @@ void MachineFrameInfo::print(const MachineFunction &MF, std::ostream &OS) const{
}
void MachineFrameInfo::dump(const MachineFunction &MF) const {
- print(MF, *cerr.stream());
+ print(MF, errs());
}
-
//===----------------------------------------------------------------------===//
// MachineJumpTableInfo implementation
//===----------------------------------------------------------------------===//
@@ -521,7 +547,7 @@ MachineJumpTableInfo::ReplaceMBBInJumpTables(MachineBasicBlock *Old,
return MadeChange;
}
-void MachineJumpTableInfo::print(std::ostream &OS) const {
+void MachineJumpTableInfo::print(raw_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) {
@@ -530,7 +556,7 @@ void MachineJumpTableInfo::print(std::ostream &OS) const {
}
}
-void MachineJumpTableInfo::dump() const { print(*cerr.stream()); }
+void MachineJumpTableInfo::dump() const { print(errs()); }
//===----------------------------------------------------------------------===//
@@ -539,10 +565,17 @@ void MachineJumpTableInfo::dump() const { print(*cerr.stream()); }
const Type *MachineConstantPoolEntry::getType() const {
if (isMachineConstantPoolEntry())
- return Val.MachineCPVal->getType();
+ return Val.MachineCPVal->getType();
return Val.ConstVal->getType();
}
+
+unsigned MachineConstantPoolEntry::getRelocationInfo() const {
+ if (isMachineConstantPoolEntry())
+ return Val.MachineCPVal->getRelocationInfo();
+ return Val.ConstVal->getRelocationInfo();
+}
+
MachineConstantPool::~MachineConstantPool() {
for (unsigned i = 0, e = Constants.size(); i != e; ++i)
if (Constants[i].isMachineConstantPoolEntry())
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