mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-04-09 03:01:17 +00:00
6bbbf294d1
also gives the JIT the ability to dynamically load targets. e.g. lli -load libparisc.so -march=parisc foo.bc llvm-svn: 14750
52 lines
2.0 KiB
C++
52 lines
2.0 KiB
C++
//===-- TargetSelect.cpp - Target Chooser Code ----------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the hideously gross code that is currently used to select
|
|
// a particular TargetMachine for the JIT to use. This should obviously be
|
|
// improved in the future, probably by having the TargetMachines register
|
|
// themselves with the runtime, and then have them choose themselves if they
|
|
// match the current machine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "JIT.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/ModuleProvider.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetMachineRegistry.h"
|
|
#include <iostream>
|
|
using namespace llvm;
|
|
|
|
static cl::opt<const TargetMachineRegistry::Entry*, false, TargetNameParser>
|
|
MArch("march", cl::desc("Architecture to generate assembly for:"));
|
|
|
|
/// create - Create an return a new JIT compiler if there is one available
|
|
/// for the current target. Otherwise, return null.
|
|
///
|
|
ExecutionEngine *JIT::create(ModuleProvider *MP, IntrinsicLowering *IL) {
|
|
if (MArch == 0) {
|
|
std::string Error;
|
|
MArch = TargetMachineRegistry::getClosestTargetForJIT(Error);
|
|
if (MArch == 0) return 0;
|
|
} else if (MArch->JITMatchQualityFn() == 0) {
|
|
std::cerr << "WARNING: This target JIT is not designed for the host you are"
|
|
<< " running. If bad things happen, please choose a different "
|
|
<< "-march switch.\n";
|
|
}
|
|
|
|
// Allocate a target...
|
|
TargetMachine *Target = MArch->CtorFn(*MP->getModule(), IL);
|
|
assert(Target && "Could not allocate target machine!");
|
|
|
|
// If the target supports JIT code generation, return a new JIT now.
|
|
if (TargetJITInfo *TJ = Target->getJITInfo())
|
|
return new JIT(MP, *Target, *TJ);
|
|
return 0;
|
|
}
|