Kill ModuleProvider and ghost linkage by inverting the relationship between

[oota-llvm.git] / lib / Target / PowerPC / PPCSubtarget.h

diff --git a/lib/Target/PowerPC/PPCSubtarget.h b/lib/Target/PowerPC/PPCSubtarget.h
index 9d0edf54ffb3022a163bb58412ac631e3d186fb4..75fcf6238a27a0463237a86a8f4fda8178241d5f 100644 (file)
--- a/lib/Target/PowerPC/PPCSubtarget.h
+++ b/lib/Target/PowerPC/PPCSubtarget.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Nate Begeman and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -14,44 +14,133 @@
 #ifndef POWERPCSUBTARGET_H
 #define POWERPCSUBTARGET_H
 
+#include "llvm/Target/TargetInstrItineraries.h"
 #include "llvm/Target/TargetSubtarget.h"
 
 #include <string>
 
+// GCC #defines PPC on Linux but we use it as our namespace name
+#undef PPC
+
 namespace llvm {
-class Module;
 
+namespace PPC {
+  // -m directive values.
+  enum {
+    DIR_NONE,
+    DIR_32,
+    DIR_601, 
+    DIR_602, 
+    DIR_603, 
+    DIR_7400,
+    DIR_750, 
+    DIR_970, 
+    DIR_64  
+  };
+}
+
+class GlobalValue;
+class TargetMachine;
+  
 class PPCSubtarget : public TargetSubtarget {
 protected:
   /// 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;
+  
+  /// Selected instruction itineraries (one entry per itinerary class.)
+  InstrItineraryData InstrItins;
+  
+  /// Which cpu directive was used.
+  unsigned DarwinDirective;
 
   /// Used by the ISel to turn in optimizations for POWER4-derived architectures
   bool IsGigaProcessor;
-  bool Is64Bit;
-  bool Has64BitRegs;
+  bool Has64BitSupport;
+  bool Use64BitRegs;
+  bool IsPPC64;
+  bool HasAltivec;
   bool HasFSQRT;
-  bool IsAIX;
-  bool IsDarwin;
+  bool HasSTFIWX;
+  bool HasLazyResolverStubs;
+  
+  /// DarwinVers - Nonzero if this is a darwin platform.  Otherwise, the numeric
+  /// version of the platform, e.g. 8 = 10.4 (Tiger), 9 = 10.5 (Leopard), etc.
+  unsigned char DarwinVers; // Is any darwin-ppc platform.
 public:
   /// This constructor initializes the data members to match that
-  /// of the specified module.
+  /// of the specified triple.
   ///
-  PPCSubtarget(const Module &M, const std::string &FS);
+  PPCSubtarget(const std::string &TT, const std::string &FS, bool is64Bit);
+  
+  /// 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);
+
+  
+  /// SetJITMode - This is called to inform the subtarget info that we are
+  /// producing code for the JIT.
+  void SetJITMode();
 
   /// 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; }
+  
+  /// getDarwinDirective - Returns the -m directive specified for the cpu.
+  ///
+  unsigned getDarwinDirective() const { return DarwinDirective; }
+  
+  /// getInstrItins - Return the instruction itineraies based on subtarget 
+  /// selection.
+  const InstrItineraryData &getInstrItineraryData() const { return InstrItins; }
 
-  bool hasFSQRT() const { return HasFSQRT; }
+  /// getTargetDataString - Return the pointer size and type alignment
+  /// properties of this subtarget.
+  const char *getTargetDataString() const {
+    // Note, the alignment values for f64 and i64 on ppc64 in Darwin
+    // documentation are wrong; these are correct (i.e. "what gcc does").
+    return isPPC64() ? "E-p:64:64-f64:64:64-i64:64:64-f128:64:128-n32:64"
+                     : "E-p:32:32-f64:32:64-i64:32:64-f128:64:128-n32";
+  }
+
+  /// isPPC64 - Return true if we are generating code for 64-bit pointer mode.
+  ///
+  bool isPPC64() const { return IsPPC64; }
+  
+  /// has64BitSupport - Return true if the selected CPU supports 64-bit
+  /// instructions, regardless of whether we are in 32-bit or 64-bit mode.
+  bool has64BitSupport() const { return Has64BitSupport; }
+  
+  /// use64BitRegs - Return true if in 64-bit mode or if we should use 64-bit
+  /// registers in 32-bit mode when possible.  This can only true if
+  /// has64BitSupport() returns true.
+  bool use64BitRegs() const { return Use64BitRegs; }
+  
+  /// hasLazyResolverStub - Return true if accesses to the specified global have
+  /// to go through a dyld lazy resolution stub.  This means that an extra load
+  /// is required to get the address of the global.
+  bool hasLazyResolverStub(const GlobalValue *GV, 
+                           const TargetMachine &TM) const;
   
-  bool isAIX() const { return IsAIX; }
-  bool isDarwin() const { return IsDarwin; }
-  bool is64Bit() const { return Is64Bit; }
-  bool has64BitRegs() const { return Has64BitRegs; }
+  // Specific obvious features.
+  bool hasFSQRT() const { return HasFSQRT; }
+  bool hasSTFIWX() const { return HasSTFIWX; }
+  bool hasAltivec() const { return HasAltivec; }
   bool isGigaProcessor() const { return IsGigaProcessor; }
+
+  /// isDarwin - True if this is any darwin platform.
+  bool isDarwin() const { return DarwinVers != 0; }
+  /// isDarwin - True if this is darwin9 (leopard, 10.5) or above.
+  bool isDarwin9() const { return DarwinVers >= 9; }
+
+  /// getDarwinVers - Return the darwin version number, 8 = tiger, 9 = leopard.
+  unsigned getDarwinVers() const { return DarwinVers; }
+
+  bool isDarwinABI() const { return isDarwin(); }
+  bool isSVR4ABI() const { return !isDarwin(); }
+
 };
 } // End llvm namespace