mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-20 11:29:24 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11844 91177308-0d34-0410-b5e6-96231b3b80d8
94 lines
2.9 KiB
C++
94 lines
2.9 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/TargetMachineImpls.h"
|
|
#include "Support/CommandLine.h"
|
|
using namespace llvm;
|
|
|
|
#if !defined(ENABLE_X86_JIT) && !defined(ENABLE_SPARC_JIT)
|
|
#define NO_JITS_ENABLED
|
|
#endif
|
|
|
|
namespace {
|
|
enum ArchName { x86, SparcV9 };
|
|
|
|
#ifndef NO_JITS_ENABLED
|
|
cl::opt<ArchName>
|
|
Arch("march", cl::desc("Architecture to JIT to:"), cl::Prefix,
|
|
cl::values(
|
|
#ifdef ENABLE_X86_JIT
|
|
clEnumVal(x86, " IA-32 (Pentium and above)"),
|
|
#endif
|
|
#ifdef ENABLE_SPARC_JIT
|
|
clEnumValN(SparcV9, "sparcv9", " Sparc-V9"),
|
|
#endif
|
|
0),
|
|
#if defined(ENABLE_X86_JIT)
|
|
cl::init(x86)
|
|
#elif defined(ENABLE_SPARC_JIT)
|
|
cl::init(SparcV9)
|
|
#endif
|
|
);
|
|
#endif /* NO_JITS_ENABLED */
|
|
}
|
|
|
|
/// 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) {
|
|
TargetMachine* (*TargetMachineAllocator)(const Module &,
|
|
IntrinsicLowering *IL) = 0;
|
|
|
|
// Allow a command-line switch to override what *should* be the default target
|
|
// machine for this platform. This allows for debugging a Sparc JIT on X86 --
|
|
// our X86 machines are much faster at recompiling LLVM and linking LLI.
|
|
#ifndef NO_JITS_ENABLED
|
|
|
|
switch (Arch) {
|
|
#ifdef ENABLE_X86_JIT
|
|
case x86:
|
|
TargetMachineAllocator = allocateX86TargetMachine;
|
|
break;
|
|
#endif
|
|
#ifdef ENABLE_SPARC_JIT
|
|
case SparcV9:
|
|
TargetMachineAllocator = allocateSparcV9TargetMachine;
|
|
break;
|
|
#endif
|
|
default:
|
|
assert(0 && "-march flag not supported on this host!");
|
|
}
|
|
#else
|
|
return 0;
|
|
#endif
|
|
|
|
// Allocate a target...
|
|
TargetMachine *Target = TargetMachineAllocator(*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;
|
|
}
|
|
|
|
|