-//===------------------------------------------------------------------------===
-// LLVM 'LLC' UTILITY
+//===-- llc.cpp - Implement the LLVM Compiler -----------------------------===//
//
// This is the llc compiler driver.
//
-//===------------------------------------------------------------------------===
+//===----------------------------------------------------------------------===//
#include "llvm/Bytecode/Reader.h"
-#include "llvm/Optimizations/Normalize.h"
-#include "llvm/CodeGen/Sparc.h"
-#include "llvm/Support/CommandLine.h"
+#include "llvm/Target/Sparc.h"
+#include "llvm/Target/TargetMachine.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>
+using std::string;
-cl::String InputFilename ("", "Input filename", cl::NoFlags, "-");
-cl::String OutputFilename("o", "Output filename", cl::NoFlags, "");
+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);
-static void NormalizeMethod(Method* method) {
- NormalizePhiConstantArgs(method);
-}
+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);
-static bool CompileModule(Module *M, TargetMachine &Target) {
- for (Module::const_iterator MI = M->begin(), ME = M->end(); MI != ME; ++MI) {
- Method *Meth = *MI;
-
- NormalizeMethod(Meth);
-
- if (Target.compileMethod(Meth)) return true;
+// 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;
}
-
- return false;
+ return outputFilename;
}
-
-//---------------------------------------------------------------------------
+//===---------------------------------------------------------------------===//
// Function main()
//
// Entry point for the llc compiler.
-//---------------------------------------------------------------------------
+//===---------------------------------------------------------------------===//
-int main(int argc, char** argv) {
+int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
- UltraSparc Target;
- Module *module = ParseBytecodeFile(InputFilename);
- if (module == 0) {
+ // Allocate a target... in the future this will be controllable on the
+ // command line.
+ std::auto_ptr<TargetMachine> target(allocateSparcTargetMachine());
+ assert(target.get() && "Could not allocate target machine!");
+
+ TargetMachine &Target = *target.get();
+
+ // Load the module to be compiled...
+ std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
+ if (M.get() == 0) {
cerr << "bytecode didn't read correctly.\n";
return 1;
}
- if (CompileModule(module, Target)) {
- cerr << "Error compiling " << InputFilename << "!\n";
- delete module;
- return 1;
+ // Build up all of the passes that we want to do to the module...
+ PassManager Passes;
+
+ // Hoist constants out of PHI nodes into predecessor BB's
+ Passes.add(createHoistPHIConstantsPass());
+
+ 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());
}
- // Clean up and exit
- delete module;
+ // 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...
+ std::ostream *Out = 0;
+ if (OutputFilename != "") { // Specified an output filename?
+ 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 = &std::cout;
+ } else {
+ string OutputFilename = GetFileNameRoot(InputFilename);
+ OutputFilename += ".s";
+
+ 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());
+
+ if (Out != &std::cout) delete Out;
+
return 0;
}
-