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Use the new Pass infrastructure to clean up llc

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@835 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2001-10-15 17:30:47 +00:00
parent 25979243fe
commit 3524fc2197
1 changed files with 117 additions and 261 deletions
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378
tools/llc/llc.cpp
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@ -5,10 +5,12 @@
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
#include "llvm/Bytecode/Reader.h" #include "llvm/Bytecode/Reader.h"
#include "llvm/Optimizations/Normalize.h"
#include "llvm/Target/Sparc.h" #include "llvm/Target/Sparc.h"
#include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Instrumentation/TraceValues.h" #include "llvm/Transforms/Instrumentation/TraceValues.h"
#include "llvm/Transforms/LowerAllocations.h"
#include "llvm/Transforms/HoistPHIConstants.h"
#include "llvm/Transforms/PrintModulePass.h"
#include "llvm/Support/CommandLine.h" #include "llvm/Support/CommandLine.h"
#include "llvm/Module.h" #include "llvm/Module.h"
#include "llvm/Method.h" #include "llvm/Method.h"
@ -26,284 +28,77 @@ cl::Flag TraceBBValues ("trace",
cl::NoFlags, false); cl::NoFlags, false);
cl::Flag TraceMethodValues("tracem", "Trace values only at method exits", cl::Flag TraceMethodValues("tracem", "Trace values only at method exits",
cl::NoFlags, false); cl::NoFlags, false);
cl::Flag DebugTrace ("dumptrace",
#include "llvm/Assembly/Writer.h" // For DumpAsm "output trace code to a <fn>.trace.ll file",
cl::Hidden, false);
//-------------------------- Internal Functions ------------------------------//
///// // GetFileNameRoot - Helper function to get the basename of a filename...
// TODO: Remove to external file.... When Chris gets back he'll do it static inline string GetFileNameRoot(const string &InputFilename) {
/////
#include "llvm/DerivedTypes.h"
#include "llvm/iMemory.h"
#include "llvm/iOther.h"
#include "llvm/SymbolTable.h"
Method *MallocMeth = 0, *FreeMeth = 0;
// InsertMallocFreeDecls - Insert an external declaration for malloc and an
// external declaration for free for use by the ReplaceMallocFree function.
//
static void InsertMallocFreeDecls(Module *M) {
const MethodType *MallocType =
MethodType::get(PointerType::get(Type::UByteTy),
vector<const Type*>(1, Type::UIntTy), false);
SymbolTable *SymTab = M->getSymbolTableSure();
// Check for a definition of malloc
if (Value *V = SymTab->lookup(PointerType::get(MallocType), "malloc")) {
MallocMeth = cast<Method>(V); // Yup, got it
} else { // Nope, add one
M->getMethodList().push_back(MallocMeth = new Method(MallocType, "malloc"));
}
const MethodType *FreeType =
MethodType::get(Type::VoidTy,
vector<const Type*>(1, PointerType::get(Type::UByteTy)),
false);
// Check for a definition of free
if (Value *V = SymTab->lookup(PointerType::get(FreeType), "free")) {
FreeMeth = cast<Method>(V); // Yup, got it
} else { // Nope, add one
M->getMethodList().push_back(FreeMeth = new Method(FreeType, "free"));
}
}
static void ReplaceMallocFree(Method *M, const TargetData &DataLayout) {
assert(MallocMeth && FreeMeth && M && "Must call InsertMallocFreeDecls!");
// Loop over all of the instructions, looking for malloc or free instructions
for (Method::iterator BBI = M->begin(), BBE = M->end(); BBI != BBE; ++BBI) {
BasicBlock *BB = *BBI;
for (unsigned i = 0; i < BB->size(); ++i) {
BasicBlock::InstListType &BBIL = BB->getInstList();
if (MallocInst *MI = dyn_cast<MallocInst>(*(BBIL.begin()+i))) {
BBIL.remove(BBIL.begin()+i); // remove the malloc instr...
const Type *AllocTy = cast<PointerType>(MI->getType())->getValueType();
// If the user is allocating an unsized array with a dynamic size arg,
// start by getting the size of one element.
//
if (const ArrayType *ATy = dyn_cast<ArrayType>(AllocTy))
if (ATy->isUnsized()) AllocTy = ATy->getElementType();
// Get the number of bytes to be allocated for one element of the
// requested type...
unsigned Size = DataLayout.getTypeSize(AllocTy);
// malloc(type) becomes sbyte *malloc(constint)
Value *MallocArg = ConstPoolUInt::get(Type::UIntTy, Size);
if (MI->getNumOperands() && Size == 1) {
MallocArg = MI->getOperand(0); // Operand * 1 = Operand
} else if (MI->getNumOperands()) {
// Multiply it by the array size if neccesary...
MallocArg = BinaryOperator::create(Instruction::Mul,MI->getOperand(0),
MallocArg);
BBIL.insert(BBIL.begin()+i++, cast<Instruction>(MallocArg));
}
// Create the call to Malloc...
CallInst *MCall = new CallInst(MallocMeth,
vector<Value*>(1, MallocArg));
BBIL.insert(BBIL.begin()+i, MCall);
// Create a cast instruction to convert to the right type...
CastInst *MCast = new CastInst(MCall, MI->getType());
BBIL.insert(BBIL.begin()+i+1, MCast);
// Replace all uses of the old malloc inst with the cast inst
MI->replaceAllUsesWith(MCast);
delete MI; // Delete the malloc inst
} else if (FreeInst *FI = dyn_cast<FreeInst>(*(BBIL.begin()+i))) {
BBIL.remove(BB->getInstList().begin()+i);
// Cast the argument to free into a ubyte*...
CastInst *MCast = new CastInst(FI->getOperand(0),
PointerType::get(Type::UByteTy));
BBIL.insert(BBIL.begin()+i, MCast);
// Insert a call to the free function...
CallInst *FCall = new CallInst(FreeMeth,
vector<Value*>(1, MCast));
BBIL.insert(BBIL.begin()+i+1, FCall);
// Delete the old free instruction
delete FI;
}
}
}
}
// END TODO: Remove to external file....
static void NormalizeMethod(Method *M) {
NormalizePhiConstantArgs(M);
}
inline string
GetFileNameRoot(const string& InputFilename)
{
string IFN = InputFilename; string IFN = InputFilename;
string outputFilename; string outputFilename;
int Len = IFN.length(); int Len = IFN.length();
if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') { if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
outputFilename = string(IFN.begin(), IFN.end()-3); // s/.bc/.s/ outputFilename = string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
} else { } else {
outputFilename = IFN; // Append a .s to it outputFilename = IFN;
} }
return outputFilename; return outputFilename;
} }
inline string
GetTraceAssemblyFileName(const string& inFilename)
{
assert(inFilename != "-" && "files on stdin not supported with tracing");
string traceFileName = GetFileNameRoot(inFilename);
traceFileName += ".trace.ll";
return traceFileName;
}
//===---------------------------------------------------------------------===// //===---------------------------------------------------------------------===//
// Function PreprocessModule() // GenerateCodeForTarget Pass
//
// Normalization to simplify later passes.
//===---------------------------------------------------------------------===//
int
PreprocessModule(Module* module)
{
InsertMallocFreeDecls(module);
for (Module::const_iterator MI=module->begin(); MI != module->end(); ++MI)
if (! (*MI)->isExternal())
NormalizeMethod(*MI);
return 0;
}
//===---------------------------------------------------------------------===//
// Function OptimizeModule()
//
// Module optimization.
//===---------------------------------------------------------------------===//
int
OptimizeModule(Module* module)
{
return 0;
}
//===---------------------------------------------------------------------===//
// Function GenerateCodeForModule()
// //
// Native code generation for a specified target. // Native code generation for a specified target.
//===---------------------------------------------------------------------===// //===---------------------------------------------------------------------===//
int class GenerateCodeForTarget : public ConcretePass<GenerateCodeForTarget> {
GenerateCodeForModule(Module* module, TargetMachine* target) TargetMachine &Target;
{ public:
// Since any transformation pass may introduce external function decls inline GenerateCodeForTarget(TargetMachine &T) : Target(T) {}
// into the method list, find current methods first and then walk only those.
// // doPerMethodWork - This method does the actual work of generating code for
vector<Method*> initialMethods(module->begin(), module->end()); // the specified method.
//
bool doPerMethodWorkVirt(Method *M) {
// Replace malloc and free instructions with library calls if (!M->isExternal() && Target.compileMethod(M)) {
// cerr << "Error compiling " << InputFilename << "!\n";
for (unsigned i=0, N = initialMethods.size(); i < N; i++) return true;
if (! initialMethods[i]->isExternal())
ReplaceMallocFree(initialMethods[i], target->DataLayout);
// Insert trace code to assist debugging
//
if (TraceBBValues || TraceMethodValues)
{
// Insert trace code in all methods in the module
for (unsigned i=0, N = initialMethods.size(); i < N; i++)
if (! initialMethods[i]->isExternal())
InsertCodeToTraceValues(initialMethods[i], TraceBBValues,
TraceBBValues || TraceMethodValues);
// Then write the module with tracing code out in assembly form
string traceFileName = GetTraceAssemblyFileName(InputFilename);
ofstream* ofs = new ofstream(traceFileName.c_str(),
(Force ? 0 : ios::noreplace)|ios::out);
if (!ofs->good()) {
cerr << "Error opening " << traceFileName << "!\n";
delete ofs;
return 1;
}
WriteToAssembly(module, *ofs);
delete ofs;
} }
return false;
// Generate native target code for all methods }
// };
for (unsigned i=0, N = initialMethods.size(); i < N; i++)
if (! initialMethods[i]->isExternal())
{
if (DumpAsm)
cerr << "Method after xformations: \n" << initialMethods[i];
if (target->compileMethod(initialMethods[i])) {
cerr << "Error compiling " << InputFilename << "!\n";
return 1;
}
}
return 0;
}
//===---------------------------------------------------------------------===// //===---------------------------------------------------------------------===//
// Function EmitAssemblyForModule() // EmitAssembly Pass
// //
// Write assembly code to specified output file; <ModuleName>.s by default. // Write assembly code to specified output stream
//===---------------------------------------------------------------------===// //===---------------------------------------------------------------------===//
int class EmitAssembly : public ConcretePass<EmitAssembly> {
EmitAssemblyForModule(Module* module, TargetMachine* target) const TargetMachine &Target; // Target to compile for
{ ostream *Out; // Stream to print on
// Figure out where we are going to send the output... bool DeleteStream; // Delete stream in dtor?
ostream *Out = 0;
if (OutputFilename != "") { // Specified an output filename? Module *TheMod;
Out = new ofstream(OutputFilename.c_str(), public:
(Force ? 0 : ios::noreplace)|ios::out); inline EmitAssembly(const TargetMachine &T, ostream *O, bool D)
} else { : Target(T), Out(O), DeleteStream(D) {}
if (InputFilename == "-") {
OutputFilename = "-"; virtual bool doPassInitializationVirt(Module *M) {
Out = &cout; TheMod = M;
} else { return false;
string OutputFilename = GetFileNameRoot(InputFilename);
OutputFilename += ".s";
Out = new ofstream(OutputFilename.c_str(),
(Force ? 0 : ios::noreplace)|ios::out);
if (!Out->good()) {
cerr << "Error opening " << OutputFilename << "!\n";
delete Out;
return 1;
}
}
} }
// Emit the output... ~EmitAssembly() {
target->emitAssembly(module, *Out); Target.emitAssembly(TheMod, *Out);
if (Out != &cout) delete Out; if (DeleteStream) delete Out;
}
return 0; };
}
//===---------------------------------------------------------------------===// //===---------------------------------------------------------------------===//
@ -321,6 +116,9 @@ main(int argc, char **argv)
// Allocate a target... in the future this will be controllable on the // Allocate a target... in the future this will be controllable on the
// command line. // command line.
auto_ptr<TargetMachine> target(allocateSparcTargetMachine()); auto_ptr<TargetMachine> target(allocateSparcTargetMachine());
assert(target.get() && "Could not allocate target machine!");
TargetMachine &Target = *target.get();
// Load the module to be compiled... // Load the module to be compiled...
auto_ptr<Module> M(ParseBytecodeFile(InputFilename)); auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
@ -328,16 +126,74 @@ main(int argc, char **argv)
cerr << "bytecode didn't read correctly.\n"; cerr << "bytecode didn't read correctly.\n";
return 1; return 1;
} }
// Build up all of the passes that we want to do to the module...
vector<Pass*> Passes;
// Replace malloc and free instructions with library calls
Passes.push_back(new LowerAllocations(Target.DataLayout));
// Hoist constants out of PHI nodes into predecessor BB's
Passes.push_back(new HoistPHIConstants());
if (TraceBBValues || TraceMethodValues) // If tracing enabled...
// Insert trace code in all methods in the module
Passes.push_back(new InsertTraceCode(TraceBBValues,
TraceBBValues || TraceMethodValues));
if (DebugTrace) { // If Trace Debugging is enabled...
// Then write the module with tracing code out in assembly form
assert(InputFilename != "-" && "files on stdin not supported with tracing");
string traceFileName = GetFileNameRoot(InputFilename) + ".trace.ll";
ostream *os = new ofstream(traceFileName.c_str(),
(Force ? 0 : ios::noreplace)|ios::out);
if (!os->good()) {
cerr << "Error opening " << traceFileName << "!\n";
delete os;
return 1;
}
Passes.push_back(new PrintModulePass("", os, true));
}
// If LLVM dumping after transformations is requested, add it to the pipeline
if (DumpAsm)
Passes.push_back(new PrintModulePass("Method after xformations: \n",&cerr));
// Generate Target code...
Passes.push_back(new GenerateCodeForTarget(Target));
if (!DoNotEmitAssembly) { // If asm output is enabled...
// Figure out where we are going to send the output...
ostream *Out = 0;
if (OutputFilename != "") { // Specified an output filename?
Out = new ofstream(OutputFilename.c_str(),
(Force ? 0 : ios::noreplace)|ios::out);
} else {
if (InputFilename == "-") {
OutputFilename = "-";
Out = &cout;
} else {
string OutputFilename = GetFileNameRoot(InputFilename);
OutputFilename += ".s";
Out = new ofstream(OutputFilename.c_str(),
(Force ? 0 : ios::noreplace)|ios::out);
if (!Out->good()) {
cerr << "Error opening " << OutputFilename << "!\n";
delete Out;
return 1;
}
}
}
// Output assembly language to the .s file
Passes.push_back(new EmitAssembly(Target, Out, Out != &cout));
}
if (PreprocessModule(M.get())) return 1; // Run our queue of passes all at once now, efficiently.
return Pass::runAllPassesAndFree(M.get(), Passes);
if (OptimizeModule(M.get())) return 1;
if (GenerateCodeForModule(M.get(), target.get())) return 1;
if (!DoNotEmitAssembly)
if (EmitAssemblyForModule(M.get(), target.get())) return 1;
return 0;
} }