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llvm-svn: 811
This commit is contained in:
Vikram S. Adve 2001-10-14 23:29:28 +00:00
parent 1090dc96ff
commit 2f084b2c73
2 changed files with 172 additions and 44 deletions
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2
llvm/tools/llc/Makefile
View File

@ -1,6 +1,6 @@
LEVEL = ../..
TOOLNAME = llc
USEDLIBS = sparc regalloc sched select sparc regalloc sched select target opt livevar bcreader vmcore asmwriter analysis support
USEDLIBS = sparc regalloc sched select sparc regalloc sched select target opt instrument livevar bcreader vmcore asmwriter analysis support
include $(LEVEL)/Makefile.common

214
llvm/tools/llc/llc.cpp
View File

@ -8,16 +8,24 @@
#include "llvm/Optimizations/Normalize.h"
#include "llvm/Target/Sparc.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Instrumentation/TraceValues.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Module.h"
#include "llvm/Method.h"
#include <memory>
#include <string>
#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);
cl::Flag DumpAsm ("d", "Print bytecode before native code generation", cl::Hidden,false);
cl::Flag DoNotEmitAssembly("noasm", "Do not emit assembly code", cl::Hidden, false);
cl::Flag TraceBBValues ("trace",
"Trace values at basic block and method exits",
cl::NoFlags, false);
cl::Flag TraceMethodValues("tracem", "Trace values only at method exits",
cl::NoFlags, false);
#include "llvm/Assembly/Writer.h" // For DumpAsm
@ -139,46 +147,134 @@ static void NormalizeMethod(Method *M) {
NormalizePhiConstantArgs(M);
}
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; // Append a .s to it
}
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 main()
// Function PreprocessModule()
//
// Entry point for the llc compiler.
// Normalization to simplify later passes.
//===---------------------------------------------------------------------===//
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());
// Load the module to be compiled...
auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
if (M.get() == 0) {
cerr << "bytecode didn't read correctly.\n";
return 1;
}
InsertMallocFreeDecls(M.get());
// 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;
if (Target->compileMethod(Meth)) {
cerr << "Error compiling " << InputFilename << "!\n";
return 1;
}
}
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.
//===---------------------------------------------------------------------===//
int
GenerateCodeForModule(Module* module, TargetMachine* target)
{
// Since any transformation pass may introduce external function decls
// into the method list, find current methods first and then walk only those.
//
vector<Method*> initialMethods(module->begin(), module->end());
// Replace malloc and free instructions with library calls
//
for (unsigned i=0, N = initialMethods.size(); i < N; i++)
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;
}
// 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()
//
// Write assembly code to specified output file; <ModuleName>.s by default.
//===---------------------------------------------------------------------===//
int
EmitAssemblyForModule(Module* module, TargetMachine* target)
{
// Figure out where we are going to send the output...
ostream *Out = 0;
if (OutputFilename != "") { // Specified an output filename?
@ -189,13 +285,7 @@ int main(int argc, char **argv) {
OutputFilename = "-";
Out = &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);
@ -208,10 +298,48 @@ int main(int argc, char **argv) {
}
// Emit the output...
Target->emitAssembly(M.get(), *Out);
target->emitAssembly(module, *Out);
if (Out != &cout) delete Out;
return 0;
}
//===---------------------------------------------------------------------===//
// Function main()
//
// Entry point for the llc compiler.
//===---------------------------------------------------------------------===//
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());
// Load the module to be compiled...
auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
if (M.get() == 0) {
cerr << "bytecode didn't read correctly.\n";
return 1;
}
int failed = PreprocessModule(M.get());
if (!failed)
failed = OptimizeModule(M.get());
if (!failed)
failed = GenerateCodeForModule(M.get(), target.get());
if (!failed && ! DoNotEmitAssembly)
failed = EmitAssemblyForModule(M.get(), target.get());
return failed;
}