-//===-- MachineCodeForMethod.cpp -------------------------------------------=//
+//===-- MachineFunction.cpp -----------------------------------------------===//
//
-// Purpose:
-// Collect native machine code information for a function.
-// This allows target-specific information about the generated code
-// to be stored with each function.
-//===---------------------------------------------------------------------===//
+// 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/MachineCodeForMethod.h"
#include "llvm/CodeGen/MachineInstr.h" // For debug output
-#include "llvm/CodeGen/MachineCodeForBasicBlock.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineCodeForInstruction.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/MachineFrameInfo.h"
#include "llvm/Target/MachineCacheInfo.h"
#include "llvm/Function.h"
-#include "llvm/BasicBlock.h"
#include "llvm/iOther.h"
+#include "llvm/Pass.h"
#include <limits.h>
-#include <iostream>
const int INVALID_FRAME_OFFSET = INT_MAX; // std::numeric_limits<int>::max();
-static AnnotationID MCFM_AID(
+static AnnotationID MF_AID(
AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
+
+//===---------------------------------------------------------------------===//
+// Code generation/destruction passes
+//===---------------------------------------------------------------------===//
+
+namespace {
+ class ConstructMachineFunction : public FunctionPass {
+ TargetMachine &Target;
+ public:
+ ConstructMachineFunction(TargetMachine &T) : Target(T) {}
+
+ const char *getPassName() const {
+ return "ConstructMachineFunction";
+ }
+
+ bool runOnFunction(Function &F) {
+ MachineFunction::construct(&F, Target).CalculateArgSize();
+ return false;
+ }
+ };
+
+ struct DestroyMachineFunction : public FunctionPass {
+ const char *getPassName() const { return "FreeMachineFunction"; }
+
+ static void freeMachineCode(Instruction &I) {
+ MachineCodeForInstruction::destroy(&I);
+ }
+
+ 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_each(FI->begin(), FI->end(), freeMachineCode);
+
+ return false;
+ }
+ };
+
+ struct Printer : public FunctionPass {
+ const char *getPassName() const { return "MachineFunction Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ }
+
+ bool runOnFunction(Function &F) {
+ MachineFunction::get(&F).dump();
+ return false;
+ }
+ };
+}
+
+Pass *createMachineCodeConstructionPass(TargetMachine &Target) {
+ return new ConstructMachineFunction(Target);
+}
+
+Pass *createMachineCodeDestructionPass() {
+ return new DestroyMachineFunction();
+}
+
+Pass *createMachineFunctionPrinterPass() {
+ return new Printer();
+}
+
+
+//===---------------------------------------------------------------------===//
+// MachineFunction implementation
+//===---------------------------------------------------------------------===//
+
+MachineFunction::MachineFunction(const Function *F,
+ const TargetMachine& target)
+ : Annotation(MF_AID),
+ Fn(F), Target(target), staticStackSize(0),
+ automaticVarsSize(0), regSpillsSize(0),
+ maxOptionalArgsSize(0), maxOptionalNumArgs(0),
+ currentTmpValuesSize(0), maxTmpValuesSize(0), compiledAsLeaf(false),
+ spillsAreaFrozen(false), automaticVarsAreaFrozen(false)
+{
+}
+
+void MachineFunction::dump() const { print(std::cerr); }
+
+void MachineFunction::print(std::ostream &OS) const {
+ OS << "\n" << *(Value*)Fn->getReturnType() << " \"" << Fn->getName()<< "\"\n";
+
+ for (const_iterator BB = begin(); BB != end(); ++BB) {
+ BasicBlock *LBB = BB->getBasicBlock();
+ OS << "\n" << LBB->getName() << " ("
+ << (const void*)BB->getBasicBlock() << "):\n";
+ for (MachineBasicBlock::const_iterator I = BB->begin(); I != BB->end();++I){
+ OS << "\t";
+ (*I)->print(OS, Target);
+ }
+ }
+ 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
// This should not be called before "construct()"
// for a given Function.
//
-MachineCodeForMethod&
-MachineCodeForMethod::construct(const Function *M, const TargetMachine &Tar)
+MachineFunction&
+MachineFunction::construct(const Function *Fn, const TargetMachine &Tar)
{
- assert(M->getAnnotation(MCFM_AID) == 0 &&
+ assert(Fn->getAnnotation(MF_AID) == 0 &&
"Object already exists for this function!");
- MachineCodeForMethod* mcInfo = new MachineCodeForMethod(M, Tar);
- M->addAnnotation(mcInfo);
+ MachineFunction* mcInfo = new MachineFunction(Fn, Tar);
+ Fn->addAnnotation(mcInfo);
return *mcInfo;
}
void
-MachineCodeForMethod::destruct(const Function *M)
+MachineFunction::destruct(const Function *Fn)
{
- bool Deleted = M->deleteAnnotation(MCFM_AID);
+ bool Deleted = Fn->deleteAnnotation(MF_AID);
assert(Deleted && "Machine code did not exist for function!");
}
-MachineCodeForMethod&
-MachineCodeForMethod::get(const Function *F)
+MachineFunction& MachineFunction::get(const Function *F)
{
- MachineCodeForMethod *mc = (MachineCodeForMethod*)F->getAnnotation(MCFM_AID);
+ MachineFunction *mc = (MachineFunction*)F->getAnnotation(MF_AID);
assert(mc && "Call construct() method first to allocate the object");
return *mc;
}
"compute MaxOptionalArgsSize");
sizeForThisCall = 0;
for (unsigned i = 0; i < numOperands; ++i)
- sizeForThisCall += target.findOptimalStorageSize(callInst->
+ sizeForThisCall += target.DataLayout.getTypeSize(callInst->
getOperand(i)->getType());
}
}
// 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, ...).
+// 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 HAS BEEN COPIED FROM EMITASSEMBLY.CPP AND
-// SHOULD BE USED DIRECTLY THERE
+// 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 int
SizeToAlignment(unsigned int size, const TargetMachine& target)
return cacheLineSize;
else
for (unsigned sz=1; /*no condition*/; sz *= 2)
- if (sz >= size)
+ if (sz >= size || sz >= target.DataLayout.getDoubleAlignment())
return sz;
}
-
-/*ctor*/
-MachineCodeForMethod::MachineCodeForMethod(const Function *F,
- const TargetMachine& target)
- : Annotation(MCFM_AID),
- method(F), staticStackSize(0),
- automaticVarsSize(0), regSpillsSize(0),
- maxOptionalArgsSize(0), maxOptionalNumArgs(0),
- currentTmpValuesSize(0), maxTmpValuesSize(0), compiledAsLeaf(false),
- spillsAreaFrozen(false), automaticVarsAreaFrozen(false)
-{
- maxOptionalArgsSize = ComputeMaxOptionalArgsSize(target, method,
+void MachineFunction::CalculateArgSize() {
+ maxOptionalArgsSize = ComputeMaxOptionalArgsSize(Target, Fn,
maxOptionalNumArgs);
staticStackSize = maxOptionalArgsSize
- + target.getFrameInfo().getMinStackFrameSize();
+ + Target.getFrameInfo().getMinStackFrameSize();
}
int
-MachineCodeForMethod::computeOffsetforLocalVar(const TargetMachine& target,
+MachineFunction::computeOffsetforLocalVar(const TargetMachine& target,
const Value* val,
unsigned int& getPaddedSize,
- unsigned int sizeToUse = 0)
+ unsigned int sizeToUse)
{
- bool growUp;
- int firstOffset =target.getFrameInfo().getFirstAutomaticVarOffset(*this,
- growUp);
- unsigned char align;
if (sizeToUse == 0)
- {
- sizeToUse = target.findOptimalStorageSize(val->getType());
- // align = target.DataLayout.getTypeAlignment(val->getType());
- }
-
- align = SizeToAlignment(sizeToUse, target);
-
- int offset = getAutomaticVarsSize();
- if (! growUp)
- offset += sizeToUse;
-
- if (unsigned int mod = offset % align)
- {
- offset += align - mod;
- getPaddedSize = sizeToUse + align - mod;
- }
- else
- getPaddedSize = sizeToUse;
-
- offset = growUp? firstOffset + offset
- : firstOffset - offset;
-
- return offset;
+ sizeToUse = target.findOptimalStorageSize(val->getType());
+ unsigned int align = SizeToAlignment(sizeToUse, target);
+
+ bool growUp;
+ int firstOffset = target.getFrameInfo().getFirstAutomaticVarOffset(*this,
+ growUp);
+ int offset = growUp? firstOffset + getAutomaticVarsSize()
+ : firstOffset - (getAutomaticVarsSize() + sizeToUse);
+
+ int aligned = target.getFrameInfo().adjustAlignment(offset, growUp, align);
+ getPaddedSize = sizeToUse + abs(aligned - offset);
+
+ return aligned;
}
int
-MachineCodeForMethod::allocateLocalVar(const TargetMachine& target,
+MachineFunction::allocateLocalVar(const TargetMachine& target,
const Value* val,
- unsigned int sizeToUse = 0)
+ unsigned int sizeToUse)
{
assert(! automaticVarsAreaFrozen &&
"Size of auto vars area has been used to compute an offset so "
if (offset == INVALID_FRAME_OFFSET)
{
unsigned int getPaddedSize;
- offset = this->computeOffsetforLocalVar(target, val, getPaddedSize,
- sizeToUse);
+ offset = computeOffsetforLocalVar(target, val, getPaddedSize, sizeToUse);
offsets[val] = offset;
incrementAutomaticVarsSize(getPaddedSize);
}
return offset;
}
-
+
int
-MachineCodeForMethod::allocateSpilledValue(const TargetMachine& target,
+MachineFunction::allocateSpilledValue(const TargetMachine& target,
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 int size = target.findOptimalStorageSize(type);
+ unsigned int size = target.DataLayout.getTypeSize(type);
unsigned char align = target.DataLayout.getTypeAlignment(type);
bool growUp;
int firstOffset = target.getFrameInfo().getRegSpillAreaOffset(*this, growUp);
- int offset = getRegSpillsSize();
- if (! growUp)
- offset += size;
-
- if (unsigned int mod = offset % align)
- {
- offset += align - mod;
- size += align - mod;
- }
-
- offset = growUp? firstOffset + offset
- : firstOffset - offset;
-
- incrementRegSpillsSize(size);
+ int offset = growUp? firstOffset + getRegSpillsSize()
+ : firstOffset - (getRegSpillsSize() + size);
+
+ int aligned = target.getFrameInfo().adjustAlignment(offset, growUp, align);
+ size += abs(aligned - offset); // include alignment padding in size
- return offset;
+ incrementRegSpillsSize(size); // update size of reg. spills area
+
+ return aligned;
}
int
-MachineCodeForMethod::pushTempValue(const TargetMachine& target,
+MachineFunction::pushTempValue(const TargetMachine& target,
unsigned int size)
{
- // Compute a power-of-2 alignment according to the possible sizes,
- // but not greater than the alignment of the largest type we support
- // (currently a double word -- see class TargetData).
- unsigned char align = 1;
- for (; align < size && align < target.DataLayout.getDoubleAlignment();
- align = 2*align)
- ;
-
+ unsigned int align = SizeToAlignment(size, target);
+
bool growUp;
- int firstTmpOffset = target.getFrameInfo().getTmpAreaOffset(*this, growUp);
-
- int offset = currentTmpValuesSize;
- if (! growUp)
- offset += size;
-
- if (unsigned int mod = offset % align)
- {
- offset += align - mod;
- size += align - mod;
- }
-
- offset = growUp ? firstTmpOffset + offset : firstTmpOffset - offset;
-
- incrementTmpAreaSize(size);
- return offset;
+ int firstOffset = target.getFrameInfo().getTmpAreaOffset(*this, growUp);
+
+ int offset = growUp? firstOffset + currentTmpValuesSize
+ : firstOffset - (currentTmpValuesSize + size);
+
+ int aligned = target.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
-MachineCodeForMethod::popAllTempValues(const TargetMachine& target)
+MachineFunction::popAllTempValues(const TargetMachine& target)
{
- resetTmpAreaSize();
+ resetTmpAreaSize(); // clear tmp area to reuse
}
int
-MachineCodeForMethod::getOffset(const Value* val) const
+MachineFunction::getOffset(const Value* val) const
{
hash_map<const Value*, int>::const_iterator pair = offsets.find(val);
- return (pair == offsets.end())? INVALID_FRAME_OFFSET : pair->second;
-}
-
-void
-MachineCodeForMethod::dump() const
-{
- std::cerr << "\n" << method->getReturnType()
- << " \"" << method->getName() << "\"\n";
-
- for (Function::const_iterator BB = method->begin(); BB != method->end(); ++BB)
- {
- std::cerr << std::endl << (*BB).getName() << " (" << (const void*) BB << ")" << ":" << std::endl;
- MachineCodeForBasicBlock& mvec = MachineCodeForBasicBlock::get(BB);
- for (unsigned i=0; i < mvec.size(); i++)
- std::cerr << "\t" << *mvec[i];
- }
- std::cerr << "\nEnd function \"" << method->getName() << "\"\n\n";
+ return (pair == offsets.end()) ? INVALID_FRAME_OFFSET : pair->second;
}
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