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//=====---- ARMSubtarget.h - Define Subtarget for the ARM -----*- C++ -*--====//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Evan Cheng and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the ARM specific subclass of TargetSubtarget.
//
//===----------------------------------------------------------------------===//
#ifndef ARMSUBTARGET_H
#define ARMSUBTARGET_H
#include "llvm/Target/TargetSubtarget.h"
#include <string>
namespace llvm {
class Module;
class ARMSubtarget : public TargetSubtarget {
protected:
enum ARMArchEnum {
V4T, V5T, V5TE, V6
};
/// ARMArchVersion - ARM architecture vecrsion: V4T (base), V5T, V5TE,
/// and V6.
ARMArchEnum ARMArchVersion;
/// HasVFP2 - True if the processor supports Vector Floating Point (VFP) V2
/// instructions.
bool HasVFP2;
/// IsThumb - True if we are in thumb mode, false if in ARM mode.
bool IsThumb;
bool IsDarwin;
/// UseThumbBacktraces - True if we use thumb style backtraces.
bool UseThumbBacktraces;
/// IsR9Reserved - True if R9 is a not available as general purpose register.
bool IsR9Reserved;
/// stackAlignment - The minimum alignment known to hold of the stack frame on
/// entry to the function and which must be maintained by every function.
unsigned stackAlignment;
public:
/// This constructor initializes the data members to match that
/// of the specified module.
///
ARMSubtarget(const Module &M, const std::string &FS);
/// ParseSubtargetFeatures - Parses features string setting specified
/// subtarget options. Definition of function is auto generated by tblgen.
void ParseSubtargetFeatures(const std::string &FS, const std::string &CPU);
bool hasV4TOps() const { return ARMArchVersion >= V4T; }
bool hasV5TOps() const { return ARMArchVersion >= V5T; }
bool hasV5TEOps() const { return ARMArchVersion >= V5TE; }
bool hasV6Ops() const { return ARMArchVersion >= V6; }
bool hasVFP2() const { return HasVFP2; }
bool isDarwin() const { return IsDarwin; }
bool isThumb() const { return IsThumb; }
bool useThumbBacktraces() const { return UseThumbBacktraces; }
bool isR9Reserved() const { return IsR9Reserved; }
/// getStackAlignment - Returns the minimum alignment known to hold of the
/// stack frame on entry to the function and which must be maintained by every
/// function for this subtarget.
unsigned getStackAlignment() const { return stackAlignment; }
};
} // End llvm namespace
#endif // ARMSUBTARGET_H
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