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https://github.com/c64scene-ar/llvm-6502.git
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bd199fb114
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5126 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
//===-- JIT.cpp - LLVM Just in Time Compiler ------------------------------===//
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//
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// This file implements the top-level support for creating a Just-In-Time
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// compiler for the current architecture.
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//
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//===----------------------------------------------------------------------===//
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#include "VM.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetMachineImpls.h"
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#include "llvm/Module.h"
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/// createJIT - Create an return a new JIT compiler if there is one available
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/// for the current target. Otherwise it returns null.
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///
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ExecutionEngine *ExecutionEngine::createJIT(Module *M, unsigned Config) {
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// FIXME: This should be controlled by which subdirectory gets linked in!
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#if !defined(i386) && !defined(__i386__) && !defined(__x86__)
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return 0;
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#endif
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// Allocate a target... in the future this will be controllable on the
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// command line.
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TargetMachine *Target = allocateX86TargetMachine(Config);
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assert(Target && "Could not allocate X86 target machine!");
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// Create the virtual machine object...
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return new VM(M, Target);
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}
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VM::VM(Module *M, TargetMachine *tm) : ExecutionEngine(M), TM(*tm) {
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setTargetData(TM.getTargetData());
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MCE = createEmitter(*this); // Initialize MCE
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setupPassManager();
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registerCallback();
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}
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int VM::run(const std::string &FnName, const std::vector<std::string> &Args) {
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Function *F = getModule().getNamedFunction(FnName);
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if (F == 0) {
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std::cerr << "Could not find function '" << FnName <<"' in module!\n";
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return 1;
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}
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int(*PF)(int, char**) = (int(*)(int, char**))getPointerToFunction(F);
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assert(PF != 0 && "Null pointer to function?");
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// Build an argv vector...
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char **Argv = (char**)CreateArgv(Args);
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// Call the main function...
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return PF(Args.size(), Argv);
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}
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