//===----------------------------------------------------------------------===//
#include "llvm/Bytecode/Reader.h"
-#include "llvm/Optimizations/Normalize.h"
#include "llvm/Target/Sparc.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Support/CommandLine.h"
+#include "llvm/Transforms/Instrumentation/TraceValues.h"
+#include "llvm/Transforms/ChangeAllocations.h"
+#include "llvm/Transforms/HoistPHIConstants.h"
+#include "llvm/Transforms/Scalar/DecomposeMultiDimRefs.h"
+#include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Bytecode/WriteBytecodePass.h"
+#include "llvm/Transforms/ConstantMerge.h"
#include "llvm/Module.h"
-#include "llvm/Method.h"
+#include "llvm/Function.h"
+#include "llvm/PassManager.h"
+#include "Support/CommandLine.h"
+#include "Support/Signals.h"
#include <memory>
#include <fstream>
-
-cl::String InputFilename ("", "Input filename", cl::NoFlags, "-");
-cl::String OutputFilename("o", "Output filename", cl::NoFlags, "");
-cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
-cl::Flag DumpAsm ("d", "Print assembly as compiled", cl::Hidden, false);
-
-#include "llvm/Assembly/Writer.h" // For DumpAsm
-
-//-------------------------- Internal Functions ------------------------------//
-
-
-/////
-// TODO: Remove to external file.... When Chris gets back he'll do it
-/////
-#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;
- }
- }
+using std::string;
+
+static cl::String InputFilename ("", "Input filename", cl::NoFlags, "-");
+static cl::String OutputFilename("o", "Output filename", cl::NoFlags, "");
+static cl::Flag Force ("f", "Overwrite output files");
+static cl::Flag DumpAsm ("d", "Print bytecode before native code generation", cl::Hidden);
+
+enum TraceLevel {
+ TraceOff, TraceFunctions, TraceBasicBlocks
+};
+
+static cl::Enum<enum TraceLevel> TraceValues("trace", cl::NoFlags,
+ "Trace values through functions or basic blocks",
+ clEnumValN(TraceOff , "off", "Disable trace code"),
+ clEnumValN(TraceFunctions , "function", "Trace each function"),
+ clEnumValN(TraceBasicBlocks, "basicblock", "Trace each basic block"), 0);
+
+
+// GetFileNameRoot - Helper function to get the basename of a filename...
+static inline string GetFileNameRoot(const string &InputFilename) {
+ string IFN = InputFilename;
+ string outputFilename;
+ int Len = IFN.length();
+ if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
+ outputFilename = string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
+ } else {
+ outputFilename = IFN;
}
-}
-
-
-// END TODO: Remove to external file....
-
-static void NormalizeMethod(Method *M) {
- NormalizePhiConstantArgs(M);
+ return outputFilename;
}
//===---------------------------------------------------------------------===//
int main(int argc, char **argv) {
- // Parse command line options...
cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
-
+
// Allocate a target... in the future this will be controllable on the
// command line.
- auto_ptr<TargetMachine> Target(allocateSparcTargetMachine());
+ std::auto_ptr<TargetMachine> target(allocateSparcTargetMachine());
+ assert(target.get() && "Could not allocate target machine!");
+ TargetMachine &Target = *target.get();
+
// Load the module to be compiled...
- auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
+ std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
if (M.get() == 0) {
cerr << "bytecode didn't read correctly.\n";
return 1;
}
- InsertMallocFreeDecls(M.get());
+ // Build up all of the passes that we want to do to the module...
+ PassManager Passes;
- // Loop over all of the methods in the module, compiling them.
- for (Module::const_iterator MI = M->begin(), ME = M->end(); MI != ME; ++MI) {
- Method *Meth = *MI;
-
- NormalizeMethod(Meth);
- ReplaceMallocFree(Meth, Target->DataLayout);
-
- if (DumpAsm)
- cerr << "Method after xformations: \n" << Meth;
+ // Hoist constants out of PHI nodes into predecessor BB's
+ Passes.add(createHoistPHIConstantsPass());
- if (Target->compileMethod(Meth)) {
- cerr << "Error compiling " << InputFilename << "!\n";
+ if (TraceValues != TraceOff) { // If tracing enabled...
+ // Insert trace code in all functions in the module
+ if (TraceValues == TraceBasicBlocks)
+ Passes.add(createTraceValuesPassForBasicBlocks());
+ else if (TraceValues == TraceFunctions)
+ Passes.add(createTraceValuesPassForFunction());
+ else
+ assert(0 && "Bad value for TraceValues!");
+
+ // Eliminate duplication in constant pool
+ Passes.add(createDynamicConstantMergePass());
+ }
+
+ // Decompose multi-dimensional refs into a sequence of 1D refs
+ Passes.add(createDecomposeMultiDimRefsPass());
+
+ // Write out the module with tracing code just before code generation
+ if (TraceValues != TraceOff) { // If tracing enabled...
+ assert(InputFilename != "-" &&
+ "files on stdin not supported with tracing");
+ string traceFileName = GetFileNameRoot(InputFilename) + ".trace.bc";
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << "Error opening '" << OutputFilename << "': File exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+
+ std::ostream *os = new std::ofstream(traceFileName.c_str());
+ if (!os->good()) {
+ cerr << "Error opening " << traceFileName
+ << "! SKIPPING OUTPUT OF TRACE CODE\n";
+ delete os;
return 1;
}
+
+ Passes.add(new WriteBytecodePass(os, true));
}
+ // Replace malloc and free instructions with library calls.
+ // Do this after tracing until lli implements these lib calls.
+ // For now, it will emulate malloc and free internally.
+ Passes.add(createLowerAllocationsPass(Target.DataLayout));
+
+ // If LLVM dumping after transformations is requested, add it to the pipeline
+ if (DumpAsm)
+ Passes.add(new PrintFunctionPass("Code after xformations: \n", &cerr));
+
// Figure out where we are going to send the output...
- ostream *Out = 0;
+ std::ostream *Out = 0;
if (OutputFilename != "") { // Specified an output filename?
- Out = new ofstream(OutputFilename.c_str(),
- (Force ? 0 : ios::noreplace)|ios::out);
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << "Error opening '" << OutputFilename << "': File exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+ Out = new std::ofstream(OutputFilename.c_str());
+
+ // Make sure that the Out file gets unlink'd from the disk if we get a
+ // SIGINT
+ RemoveFileOnSignal(OutputFilename);
} else {
if (InputFilename == "-") {
OutputFilename = "-";
- Out = &cout;
+ Out = &std::cout;
} else {
- string IFN = InputFilename;
- int Len = IFN.length();
- if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
- OutputFilename = string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
- } else {
- OutputFilename = IFN; // Append a .s to it
- }
+ string OutputFilename = GetFileNameRoot(InputFilename);
OutputFilename += ".s";
- Out = new ofstream(OutputFilename.c_str(),
- (Force ? 0 : ios::noreplace)|ios::out);
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << "Error opening '" << OutputFilename << "': File exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+
+ Out = new std::ofstream(OutputFilename.c_str());
if (!Out->good()) {
cerr << "Error opening " << OutputFilename << "!\n";
delete Out;
return 1;
}
+ // Make sure that the Out file gets unlink'd from the disk if we get a
+ // SIGINT
+ RemoveFileOnSignal(OutputFilename);
}
}
+
+ Target.addPassesToEmitAssembly(Passes, *Out);
+
+ // Run our queue of passes all at once now, efficiently.
+ Passes.run(M.get());
- // Emit the output...
- Target->emitAssembly(M.get(), *Out);
+ if (Out != &std::cout) delete Out;
- if (Out != &cout) delete Out;
return 0;
}
-
-
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