1 files changed, 122 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
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+++ b/lib/Target/ARM/ARMSubtarget.h
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+//=====---- ARMSubtarget.h - Define Subtarget for the ARM -----*- 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 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, V7A
+  };
+
+  enum ARMFPEnum {
+    None, VFPv2, VFPv3, NEON
+  };
+
+  enum ThumbTypeEnum {
+    Thumb1,
+    Thumb2
+  };
+
+  /// ARMArchVersion - ARM architecture version: V4T (base), V5T, V5TE,
+  /// V6, V6T2, V7A.
+  ARMArchEnum ARMArchVersion;
+
+  /// ARMFPUType - Floating Point Unit type.
+  ARMFPEnum ARMFPUType;
+
+  /// IsThumb - True if we are in thumb mode, false if in ARM mode.
+  bool IsThumb;
+
+  /// ThumbMode - Indicates supported Thumb version.
+  ThumbTypeEnum ThumbMode;
+
+  /// 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;
+
+  /// CPUString - String name of used CPU.
+  std::string CPUString;
+
+ public:
+  enum {
+    isELF, isDarwin
+  } TargetType;
+
+  enum {
+    ARM_ABI_APCS,
+    ARM_ABI_AAPCS // ARM EABI
+  } TargetABI;
+
+  /// This constructor initializes the data members to match that
+  /// of the specified module.
+  ///
+  ARMSubtarget(const Module &M, const std::string &FS, bool isThumb);
+
+  /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size
+  /// that still makes it profitable to inline the call.
+  unsigned getMaxInlineSizeThreshold() const {
+    // FIXME: For now, we don't lower memcpy's to loads / stores for Thumb.
+    // Change this once Thumb ldmia / stmia support is added.
+    return isThumb() ? 0 : 64;
+  }
+  /// ParseSubtargetFeatures - Parses features string setting specified
+  /// subtarget options.  Definition of function is auto generated by tblgen.
+  std::string 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 hasV7Ops()   const { return ARMArchVersion >= V7A;  }
+
+  bool hasVFP2() const { return ARMFPUType >= VFPv2; }
+  bool hasVFP3() const { return ARMFPUType >= VFPv3; }
+  bool hasNEON() const { return ARMFPUType >= NEON;  }
+
+  bool isTargetDarwin() const { return TargetType == isDarwin; }
+  bool isTargetELF() const { return TargetType == isELF; }
+
+  bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; }
+  bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; }
+
+  bool isThumb() const { return IsThumb; }
+  bool isThumb2() const { return IsThumb && (ThumbMode >= Thumb2); }
+
+  bool useThumbBacktraces() const { return UseThumbBacktraces; }
+  bool isR9Reserved() const { return IsR9Reserved; }
+
+  const std::string & getCPUString() const { return CPUString; }
+
+  /// 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