blob: 52541f012c7ad2fa8d52c9f9ecc3cab46110e939 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
//===-- jello.cpp - LLVM Just in Time Compiler ----------------------------===//
//
// This tool implements a just-in-time compiler for LLVM, allowing direct
// execution of LLVM bytecode in an efficient manner.
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetMachineImpls.h"
#include "Support/CommandLine.h"
#include "VM.h"
namespace {
cl::opt<std::string>
InputFile(cl::desc("<input bytecode>"), cl::Positional, cl::init("-"));
cl::opt<std::string>
MainFunction("f", cl::desc("Function to execute"), cl::init("main"),
cl::value_desc("function name"));
}
//===----------------------------------------------------------------------===//
// main Driver function
//
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm just in time compiler\n");
// Allocate a target... in the future this will be controllable on the
// command line.
std::auto_ptr<TargetMachine> Target(allocateX86TargetMachine());
assert(Target.get() && "Could not allocate target machine!");
// Parse the input bytecode file...
std::string ErrorMsg;
std::auto_ptr<Module> M(ParseBytecodeFile(InputFile, &ErrorMsg));
if (M.get() == 0) {
std::cerr << argv[0] << ": bytecode '" << InputFile
<< "' didn't read correctly: << " << ErrorMsg << "\n";
return 1;
}
// Create the virtual machine object...
VM TheVM(argv[0], *M.get(), *Target.get());
Function *F = M.get()->getNamedFunction(MainFunction);
if (F == 0) {
std::cerr << "Could not find function '" << MainFunction <<"' in module!\n";
return 1;
}
// Run the virtual machine...
return TheVM.run(F);
}
|
