For pre-v6t2 targets, only select MOVi32imm if the immediate can be handled with...

[oota-llvm.git] / lib / Target / ARM / ARMConstantPoolValue.h

diff --git a/lib/Target/ARM/ARMConstantPoolValue.h b/lib/Target/ARM/ARMConstantPoolValue.h
index b7511aa8dd644a4756e43778d40c358c5830e643..688f38bf99e3e9df186333e410802e778a4d7b0a 100644 (file)
--- a/lib/Target/ARM/ARMConstantPoolValue.h
+++ b/lib/Target/ARM/ARMConstantPoolValue.h
@@ -2,8 +2,8 @@
 //
 //                     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 is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -15,57 +15,112 @@
 #define LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
 
 #include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/Support/ErrorHandling.h"
+#include <cstddef>
 
 namespace llvm {
 
+class Constant;
+class BlockAddress;
+class GlobalValue;
+class LLVMContext;
+
 namespace ARMCP {
   enum ARMCPKind {
     CPValue,
-    CPNonLazyPtr,
-    CPStub
+    CPExtSymbol,
+    CPBlockAddress,
+    CPLSDA
+  };
+
+  enum ARMCPModifier {
+    no_modifier,
+    TLSGD,
+    GOT,
+    GOTOFF,
+    GOTTPOFF,
+    TPOFF
   };
 }
 
 /// ARMConstantPoolValue - ARM specific constantpool value. This is used to
-/// represent PC relative displacement between the address of the load
-/// instruction and the global value being loaded, i.e. (&GV-(LPIC+8)).
+/// represent PC-relative displacement between the address of the load
+/// instruction and the constant being loaded, i.e. (&GV-(LPIC+8)).
 class ARMConstantPoolValue : public MachineConstantPoolValue {
-  GlobalValue *GV;         // GlobalValue being loaded.
+  const Constant *CVal;    // Constant being loaded.
   const char *S;           // ExtSymbol being loaded.
   unsigned LabelId;        // Label id of the load.
-  ARMCP::ARMCPKind Kind;   // non_lazy_ptr or stub?
-  unsigned char PCAdjust;  // Extra adjustment if constantpool is pc relative.
+  ARMCP::ARMCPKind Kind;   // Kind of constant.
+  unsigned char PCAdjust;  // Extra adjustment if constantpool is pc-relative.
                            // 8 for ARM, 4 for Thumb.
-  const char *Modifier;    // GV modifier i.e. (&GV(modifier)-(LPIC+8))
+  ARMCP::ARMCPModifier Modifier;   // GV modifier i.e. (&GV(modifier)-(LPIC+8))
+  bool AddCurrentAddress;
 
 public:
-  ARMConstantPoolValue(GlobalValue *gv, unsigned id,
+  ARMConstantPoolValue(const Constant *cval, unsigned id,
                        ARMCP::ARMCPKind Kind = ARMCP::CPValue,
-                       unsigned char PCAdj = 0, const char *Modifier = NULL);
-  ARMConstantPoolValue(const char *s, unsigned id,
-                       ARMCP::ARMCPKind Kind = ARMCP::CPValue,
-                       unsigned char PCAdj = 0, const char *Modifier = NULL);
-  ARMConstantPoolValue(GlobalValue *GV, ARMCP::ARMCPKind Kind,
-                       const char *Modifier);
-
+                       unsigned char PCAdj = 0,
+                       ARMCP::ARMCPModifier Modifier = ARMCP::no_modifier,
+                       bool AddCurrentAddress = false);
+  ARMConstantPoolValue(LLVMContext &C, const char *s, unsigned id,
+                       unsigned char PCAdj = 0,
+                       ARMCP::ARMCPModifier Modifier = ARMCP::no_modifier,
+                       bool AddCurrentAddress = false);
+  ARMConstantPoolValue(const GlobalValue *GV, ARMCP::ARMCPModifier Modifier);
+  ARMConstantPoolValue();
+  ~ARMConstantPoolValue();
 
-  GlobalValue *getGV() const { return GV; }
+  const GlobalValue *getGV() const;
   const char *getSymbol() const { return S; }
-  const char *getModifier() const { return Modifier; }
-  bool hasModifier() const { return Modifier != NULL; }
+  const BlockAddress *getBlockAddress() const;
+  ARMCP::ARMCPModifier getModifier() const { return Modifier; }
+  const char *getModifierText() const {
+    switch (Modifier) {
+    default: llvm_unreachable("Unknown modifier!");
+    // FIXME: Are these case sensitive? It'd be nice to lower-case all the
+    // strings if that's legal.
+    case ARMCP::no_modifier: return "none";
+    case ARMCP::TLSGD:       return "tlsgd";
+    case ARMCP::GOT:         return "GOT";
+    case ARMCP::GOTOFF:      return "GOTOFF";
+    case ARMCP::GOTTPOFF:    return "gottpoff";
+    case ARMCP::TPOFF:       return "tpoff";
+    }
+  }
+  bool hasModifier() const { return Modifier != ARMCP::no_modifier; }
+  bool mustAddCurrentAddress() const { return AddCurrentAddress; }
   unsigned getLabelId() const { return LabelId; }
-  bool isNonLazyPointer() const { return Kind == ARMCP::CPNonLazyPtr; }
-  bool isStub() const { return Kind == ARMCP::CPStub; }
   unsigned char getPCAdjustment() const { return PCAdjust; }
+  bool isGlobalValue() const { return Kind == ARMCP::CPValue; }
+  bool isExtSymbol() const { return Kind == ARMCP::CPExtSymbol; }
+  bool isBlockAddress() { return Kind == ARMCP::CPBlockAddress; }
+  bool isLSDA() { return Kind == ARMCP::CPLSDA; }
+
+  virtual unsigned getRelocationInfo() const {
+    // FIXME: This is conservatively claiming that these entries require a
+    // relocation, we may be able to do better than this.
+    return 2;
+  }
 
   virtual int getExistingMachineCPValue(MachineConstantPool *CP,
                                         unsigned Alignment);
 
   virtual void AddSelectionDAGCSEId(FoldingSetNodeID &ID);
 
-  virtual void print(std::ostream &O) const;
+  /// hasSameValue - Return true if this ARM constpool value
+  /// can share the same constantpool entry as another ARM constpool value.
+  bool hasSameValue(ARMConstantPoolValue *ACPV);
+
+  void print(raw_ostream *O) const { if (O) print(*O); }
+  void print(raw_ostream &O) const;
+  void dump() const;
 };
-  
+
+inline raw_ostream &operator<<(raw_ostream &O, const ARMConstantPoolValue &V) {
+  V.print(O);
+  return O;
 }
 
+} // End llvm namespace
+
 #endif