Initial checkin of new LLI with JIT compiler
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5126 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/JIT.cpp b/lib/ExecutionEngine/JIT/JIT.cpp
new file mode 100644
index 0000000..b2b56a6
--- /dev/null
+++ b/lib/ExecutionEngine/JIT/JIT.cpp
@@ -0,0 +1,53 @@
+//===-- JIT.cpp - LLVM Just in Time Compiler ------------------------------===//
+//
+// This file implements the top-level support for creating a Just-In-Time
+// compiler for the current architecture.
+//
+//===----------------------------------------------------------------------===//
+
+#include "VM.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineImpls.h"
+#include "llvm/Module.h"
+
+
+/// createJIT - Create an return a new JIT compiler if there is one available
+/// for the current target. Otherwise it returns null.
+///
+ExecutionEngine *ExecutionEngine::createJIT(Module *M, unsigned Config) {
+ // FIXME: This should be controlled by which subdirectory gets linked in!
+#if !defined(i386) && !defined(__i386__) && !defined(__x86__)
+ return 0;
+#endif
+ // Allocate a target... in the future this will be controllable on the
+ // command line.
+ TargetMachine *Target = allocateX86TargetMachine(Config);
+ assert(Target && "Could not allocate X86 target machine!");
+
+ // Create the virtual machine object...
+ return new VM(M, Target);
+}
+
+VM::VM(Module *M, TargetMachine *tm) : ExecutionEngine(M), TM(*tm) {
+ setTargetData(TM.getTargetData());
+ MCE = createEmitter(*this); // Initialize MCE
+ setupPassManager();
+ registerCallback();
+}
+
+int VM::run(const std::string &FnName, const std::vector<std::string> &Args) {
+ Function *F = getModule().getNamedFunction(FnName);
+ if (F == 0) {
+ std::cerr << "Could not find function '" << FnName <<"' in module!\n";
+ return 1;
+ }
+
+ int(*PF)(int, char**) = (int(*)(int, char**))getPointerToFunction(F);
+ assert(PF != 0 && "Null pointer to function?");
+
+ // Build an argv vector...
+ char **Argv = (char**)CreateArgv(Args);
+
+ // Call the main function...
+ return PF(Args.size(), Argv);
+}