mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-27 15:29:51 +00:00
variables. - Module initialization functions supplanted the need for these. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75886 91177308-0d34-0410-b5e6-96231b3b80d8
256 lines
9.1 KiB
C++
256 lines
9.1 KiB
C++
//===-- X86TargetMachine.cpp - Define TargetMachine for the X86 -----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the X86 specific subclass of TargetMachine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86TargetAsmInfo.h"
|
|
#include "X86TargetMachine.h"
|
|
#include "X86.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/PassManager.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
#include "llvm/Target/TargetMachineRegistry.h"
|
|
using namespace llvm;
|
|
|
|
// Register the target.
|
|
extern Target TheX86_32Target;
|
|
static RegisterTarget<X86_32TargetMachine>
|
|
X(TheX86_32Target, "x86", "32-bit X86: Pentium-Pro and above");
|
|
|
|
extern Target TheX86_64Target;
|
|
static RegisterTarget<X86_64TargetMachine>
|
|
Y(TheX86_64Target, "x86-64", "64-bit X86: EM64T and AMD64");
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeX86Target() {
|
|
|
|
}
|
|
|
|
const TargetAsmInfo *X86TargetMachine::createTargetAsmInfo() const {
|
|
if (Subtarget.isFlavorIntel())
|
|
return new X86WinTargetAsmInfo(*this);
|
|
else
|
|
switch (Subtarget.TargetType) {
|
|
case X86Subtarget::isDarwin:
|
|
return new X86DarwinTargetAsmInfo(*this);
|
|
case X86Subtarget::isELF:
|
|
return new X86ELFTargetAsmInfo(*this);
|
|
case X86Subtarget::isMingw:
|
|
case X86Subtarget::isCygwin:
|
|
return new X86COFFTargetAsmInfo(*this);
|
|
case X86Subtarget::isWindows:
|
|
return new X86WinTargetAsmInfo(*this);
|
|
default:
|
|
return new X86GenericTargetAsmInfo(*this);
|
|
}
|
|
}
|
|
|
|
X86_32TargetMachine::X86_32TargetMachine(const Target &T, const Module &M,
|
|
const std::string &FS)
|
|
: X86TargetMachine(T, M, FS, false) {
|
|
}
|
|
|
|
|
|
X86_64TargetMachine::X86_64TargetMachine(const Target &T, const Module &M,
|
|
const std::string &FS)
|
|
: X86TargetMachine(T, M, FS, true) {
|
|
}
|
|
|
|
/// X86TargetMachine ctor - Create an X86 target.
|
|
///
|
|
X86TargetMachine::X86TargetMachine(const Target &T, const Module &M,
|
|
const std::string &FS, bool is64Bit)
|
|
: LLVMTargetMachine(T),
|
|
Subtarget(M, FS, is64Bit),
|
|
DataLayout(Subtarget.getDataLayout()),
|
|
FrameInfo(TargetFrameInfo::StackGrowsDown,
|
|
Subtarget.getStackAlignment(), Subtarget.is64Bit() ? -8 : -4),
|
|
InstrInfo(*this), JITInfo(*this), TLInfo(*this), ELFWriterInfo(*this) {
|
|
DefRelocModel = getRelocationModel();
|
|
|
|
// If no relocation model was picked, default as appropriate for the target.
|
|
if (getRelocationModel() == Reloc::Default) {
|
|
if (!Subtarget.isTargetDarwin())
|
|
setRelocationModel(Reloc::Static);
|
|
else if (Subtarget.is64Bit())
|
|
setRelocationModel(Reloc::PIC_);
|
|
else
|
|
setRelocationModel(Reloc::DynamicNoPIC);
|
|
}
|
|
|
|
assert(getRelocationModel() != Reloc::Default &&
|
|
"Relocation mode not picked");
|
|
|
|
// If no code model is picked, default to small.
|
|
if (getCodeModel() == CodeModel::Default)
|
|
setCodeModel(CodeModel::Small);
|
|
|
|
// ELF and X86-64 don't have a distinct DynamicNoPIC model. DynamicNoPIC
|
|
// is defined as a model for code which may be used in static or dynamic
|
|
// executables but not necessarily a shared library. On X86-32 we just
|
|
// compile in -static mode, in x86-64 we use PIC.
|
|
if (getRelocationModel() == Reloc::DynamicNoPIC) {
|
|
if (is64Bit)
|
|
setRelocationModel(Reloc::PIC_);
|
|
else if (!Subtarget.isTargetDarwin())
|
|
setRelocationModel(Reloc::Static);
|
|
}
|
|
|
|
// If we are on Darwin, disallow static relocation model in X86-64 mode, since
|
|
// the Mach-O file format doesn't support it.
|
|
if (getRelocationModel() == Reloc::Static &&
|
|
Subtarget.isTargetDarwin() &&
|
|
is64Bit)
|
|
setRelocationModel(Reloc::PIC_);
|
|
|
|
// Determine the PICStyle based on the target selected.
|
|
if (getRelocationModel() == Reloc::Static) {
|
|
// Unless we're in PIC or DynamicNoPIC mode, set the PIC style to None.
|
|
Subtarget.setPICStyle(PICStyles::None);
|
|
} else if (Subtarget.isTargetCygMing()) {
|
|
Subtarget.setPICStyle(PICStyles::None);
|
|
} else if (Subtarget.isTargetDarwin()) {
|
|
if (Subtarget.is64Bit())
|
|
Subtarget.setPICStyle(PICStyles::RIPRel);
|
|
else if (getRelocationModel() == Reloc::PIC_)
|
|
Subtarget.setPICStyle(PICStyles::StubPIC);
|
|
else {
|
|
assert(getRelocationModel() == Reloc::DynamicNoPIC);
|
|
Subtarget.setPICStyle(PICStyles::StubDynamicNoPIC);
|
|
}
|
|
} else if (Subtarget.isTargetELF()) {
|
|
if (Subtarget.is64Bit())
|
|
Subtarget.setPICStyle(PICStyles::RIPRel);
|
|
else
|
|
Subtarget.setPICStyle(PICStyles::GOT);
|
|
}
|
|
|
|
// Finally, if we have "none" as our PIC style, force to static mode.
|
|
if (Subtarget.getPICStyle() == PICStyles::None)
|
|
setRelocationModel(Reloc::Static);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Pass Pipeline Configuration
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
bool X86TargetMachine::addInstSelector(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel) {
|
|
// Install an instruction selector.
|
|
PM.add(createX86ISelDag(*this, OptLevel));
|
|
|
|
// If we're using Fast-ISel, clean up the mess.
|
|
if (EnableFastISel)
|
|
PM.add(createDeadMachineInstructionElimPass());
|
|
|
|
// Install a pass to insert x87 FP_REG_KILL instructions, as needed.
|
|
PM.add(createX87FPRegKillInserterPass());
|
|
|
|
return false;
|
|
}
|
|
|
|
bool X86TargetMachine::addPreRegAlloc(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel) {
|
|
// Calculate and set max stack object alignment early, so we can decide
|
|
// whether we will need stack realignment (and thus FP).
|
|
PM.add(createX86MaxStackAlignmentCalculatorPass());
|
|
return false; // -print-machineinstr shouldn't print after this.
|
|
}
|
|
|
|
bool X86TargetMachine::addPostRegAlloc(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel) {
|
|
PM.add(createX86FloatingPointStackifierPass());
|
|
return true; // -print-machineinstr should print after this.
|
|
}
|
|
|
|
bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel,
|
|
MachineCodeEmitter &MCE) {
|
|
// FIXME: Move this to TargetJITInfo!
|
|
// On Darwin, do not override 64-bit setting made in X86TargetMachine().
|
|
if (DefRelocModel == Reloc::Default &&
|
|
(!Subtarget.isTargetDarwin() || !Subtarget.is64Bit())) {
|
|
setRelocationModel(Reloc::Static);
|
|
Subtarget.setPICStyle(PICStyles::None);
|
|
}
|
|
|
|
// 64-bit JIT places everything in the same buffer except external functions.
|
|
// On Darwin, use small code model but hack the call instruction for
|
|
// externals. Elsewhere, do not assume globals are in the lower 4G.
|
|
if (Subtarget.is64Bit()) {
|
|
if (Subtarget.isTargetDarwin())
|
|
setCodeModel(CodeModel::Small);
|
|
else
|
|
setCodeModel(CodeModel::Large);
|
|
}
|
|
|
|
PM.add(createX86CodeEmitterPass(*this, MCE));
|
|
|
|
return false;
|
|
}
|
|
|
|
bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel,
|
|
JITCodeEmitter &JCE) {
|
|
// FIXME: Move this to TargetJITInfo!
|
|
// On Darwin, do not override 64-bit setting made in X86TargetMachine().
|
|
if (DefRelocModel == Reloc::Default &&
|
|
(!Subtarget.isTargetDarwin() || !Subtarget.is64Bit())) {
|
|
setRelocationModel(Reloc::Static);
|
|
Subtarget.setPICStyle(PICStyles::None);
|
|
}
|
|
|
|
// 64-bit JIT places everything in the same buffer except external functions.
|
|
// On Darwin, use small code model but hack the call instruction for
|
|
// externals. Elsewhere, do not assume globals are in the lower 4G.
|
|
if (Subtarget.is64Bit()) {
|
|
if (Subtarget.isTargetDarwin())
|
|
setCodeModel(CodeModel::Small);
|
|
else
|
|
setCodeModel(CodeModel::Large);
|
|
}
|
|
|
|
PM.add(createX86JITCodeEmitterPass(*this, JCE));
|
|
|
|
return false;
|
|
}
|
|
|
|
bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel,
|
|
ObjectCodeEmitter &OCE) {
|
|
PM.add(createX86ObjectCodeEmitterPass(*this, OCE));
|
|
return false;
|
|
}
|
|
|
|
bool X86TargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel,
|
|
MachineCodeEmitter &MCE) {
|
|
PM.add(createX86CodeEmitterPass(*this, MCE));
|
|
return false;
|
|
}
|
|
|
|
bool X86TargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel,
|
|
JITCodeEmitter &JCE) {
|
|
PM.add(createX86JITCodeEmitterPass(*this, JCE));
|
|
return false;
|
|
}
|
|
|
|
bool X86TargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
|
|
CodeGenOpt::Level OptLevel,
|
|
ObjectCodeEmitter &OCE) {
|
|
PM.add(createX86ObjectCodeEmitterPass(*this, OCE));
|
|
return false;
|
|
}
|