//===-- 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/MachineFunction.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineCodeForInstruction.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/Target/TargetCacheInfo.h"
#include "llvm/Function.h"
#include "llvm/iOther.h"
-#include "llvm/Pass.h"
-#include <limits.h>
-
-const int INVALID_FRAME_OFFSET = INT_MAX; // std::numeric_limits<int>::max();
+using namespace llvm;
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).getInfo()->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 {
+ struct Printer : public MachineFunctionPass {
const char *getPassName() const { return "MachineFunction Printer"; }
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
- bool runOnFunction(Function &F) {
- MachineFunction::get(&F).dump();
+ bool runOnMachineFunction(MachineFunction &MF) {
+ MF.dump();
return false;
}
};
}
-Pass *createMachineCodeConstructionPass(TargetMachine &Target) {
- return new ConstructMachineFunction(Target);
+FunctionPass *llvm::createMachineFunctionPrinterPass() {
+ return new Printer();
}
-Pass *createMachineCodeDestructionPass() {
- return new DestroyMachineFunction();
+namespace {
+ struct Deleter : public MachineFunctionPass {
+ const char *getPassName() const { return "Machine Code Deleter"; }
+
+ bool runOnMachineFunction(MachineFunction &MF) {
+ // Delete all of the MachineInstrs out of the function. When the sparc
+ // backend gets fixed, this can be dramatically simpler, but actually
+ // putting this stuff into the MachineBasicBlock destructor!
+ for (MachineFunction::iterator BB = MF.begin(), E = MF.end(); BB != E;
+ ++BB)
+ while (!BB->empty())
+ delete BB->pop_back();
+
+ // Delete the annotation from the function now.
+ MachineFunction::destruct(MF.getFunction());
+ return true;
+ }
+ };
}
-Pass *createMachineFunctionPrinterPass() {
- return new Printer();
+/// 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();
}
getConstantPool()->print(OS);
for (const_iterator BB = begin(); BB != end(); ++BB) {
- BasicBlock *LBB = BB->getBasicBlock();
+ const BasicBlock *LBB = BB->getBasicBlock();
OS << "\n" << LBB->getName() << " (" << (const void*)LBB << "):\n";
for (MachineBasicBlock::const_iterator I = BB->begin(); I != BB->end();++I){
OS << "\t";
return *mcInfo;
}
-void
-MachineFunction::destruct(const Function *Fn)
-{
+void MachineFunction::destruct(const Function *Fn) {
bool Deleted = Fn->deleteAnnotation(MF_AID);
assert(Deleted && "Machine code did not exist for function!");
}
return aligned;
}
-int
-MachineFunctionInfo::allocateLocalVar(const Value* val,
- unsigned sizeToUse)
-{
+
+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
//
- int offset = getOffset(val);
- if (offset == INVALID_FRAME_OFFSET)
- {
- unsigned getPaddedSize;
- offset = computeOffsetforLocalVar(val, getPaddedSize, sizeToUse);
- offsets[val] = offset;
- incrementAutomaticVarsSize(getPaddedSize);
- }
+ 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;
}
resetTmpAreaSize(); // clear tmp area to reuse
}
-int
-MachineFunctionInfo::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;
-}
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