llvm-6502/lib/Target/SystemZ/SystemZTargetMachine.h
Eric Christopher 04bcc11905 Move DataLayout back to the TargetMachine from TargetSubtargetInfo
derived classes.

Since global data alignment, layout, and mangling is often based on the
DataLayout, move it to the TargetMachine. This ensures that global
data is going to be layed out and mangled consistently if the subtarget
changes on a per function basis. Prior to this all targets(*) have
had subtarget dependent code moved out and onto the TargetMachine.

*One target hasn't been migrated as part of this change: R600. The
R600 port has, as a subtarget feature, the size of pointers and
this affects global data layout. I've currently hacked in a FIXME
to enable progress, but the port needs to be updated to either pass
the 64-bitness to the TargetMachine, or fix the DataLayout to
avoid subtarget dependent features.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227113 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-26 19:03:15 +00:00

52 lines
1.6 KiB
C++

//==- SystemZTargetMachine.h - Define TargetMachine for SystemZ ---*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the SystemZ specific subclass of TargetMachine.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETMACHINE_H
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETMACHINE_H
#include "SystemZSubtarget.h"
#include "llvm/Target/TargetMachine.h"
namespace llvm {
class TargetFrameLowering;
class SystemZTargetMachine : public LLVMTargetMachine {
std::unique_ptr<TargetLoweringObjectFile> TLOF;
const DataLayout DL;
SystemZSubtarget Subtarget;
public:
SystemZTargetMachine(const Target &T, StringRef TT, StringRef CPU,
StringRef FS, const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL);
~SystemZTargetMachine() override;
// Override TargetMachine.
const DataLayout *getDataLayout() const override { return &DL; }
const SystemZSubtarget *getSubtargetImpl() const override {
return &Subtarget;
}
// Override LLVMTargetMachine
TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
TargetLoweringObjectFile *getObjFileLowering() const override {
return TLOF.get();
}
};
} // end namespace llvm
#endif