Make RegARM32 a namespace rather than a class.

src/IceInstARM32.cpp

@@ -757,7 +757,7 @@ void InstARM32RegisterStackOp::emitSRegsAsText(const Cfg *Func,
       IsFirst = false;
     else
       Str << ", ";
-    Str << RegARM32::getSRegName(Base + i);
+    Str << RegARM32::getRegName(Base + i);
   }
   Str << "}";
 }

src/IceRegistersARM32.h

@@ -22,44 +22,11 @@
 
 namespace Ice {
 namespace ARM32 {
+namespace RegARM32 {
 
-/// SizeOf is used to obtain the size of an initializer list as a constexpr
-/// expression. This is only needed until our C++ library is updated to
-/// C++ 14 -- which defines constexpr members to std::initializer_list.
-class SizeOf {
-  SizeOf(const SizeOf &) = delete;
-  SizeOf &operator=(const SizeOf &) = delete;
-
-public:
-  constexpr SizeOf() : Size(0) {}
-  template <typename... T>
-  explicit constexpr SizeOf(T...)
-      : Size(__length<T...>::value) {}
-  constexpr SizeT size() const { return Size; }
-
-private:
-  template <typename T, typename... U> struct __length {
-    static constexpr std::size_t value = 1 + __length<U...>::value;
-  };
-
-  template <typename T> struct __length<T> {
-    static constexpr std::size_t value = 1;
-  };
-
-  const std::size_t Size;
-};
-
-class RegARM32 {
-private:
-  RegARM32() = delete;
-  RegARM32(const RegARM32 &) = delete;
-  RegARM32 &operator=(const RegARM32 &) = delete;
-  ~RegARM32() = delete;
-
-public:
-  /// An enum of every register. The enum value may not match the encoding used
-  /// to binary encode register operands in instructions.
-  enum AllRegisters {
+/// An enum of every register. The enum value may not match the encoding used
+/// to binary encode register operands in instructions.
+enum AllRegisters {
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
   val,
@@ -69,53 +36,53 @@ public:
 #define X(val, init) val init,
   REGARM32_TABLE_BOUNDS
 #undef X
-  };
+};
 
-  /// An enum of GPR Registers. The enum value does match the encoding used to
-  /// binary encode register operands in instructions.
-  enum GPRRegister {
+/// An enum of GPR Registers. The enum value does match the encoding used to
+/// binary encode register operands in instructions.
+enum GPRRegister {
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
   Encoded_##val = encode,
   REGARM32_GPR_TABLE
 #undef X
       Encoded_Not_GPR = -1
-  };
+};
 
-  /// An enum of FP32 S-Registers. The enum value does match the encoding used
-  /// to binary encode register operands in instructions.
-  enum SRegister {
+/// An enum of FP32 S-Registers. The enum value does match the encoding used
+/// to binary encode register operands in instructions.
+enum SRegister {
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
   Encoded_##val = encode,
   REGARM32_FP32_TABLE
 #undef X
       Encoded_Not_SReg = -1
-  };
+};
 
-  /// An enum of FP64 D-Registers. The enum value does match the encoding used
-  /// to binary encode register operands in instructions.
-  enum DRegister {
+/// An enum of FP64 D-Registers. The enum value does match the encoding used
+/// to binary encode register operands in instructions.
+enum DRegister {
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
   Encoded_##val = encode,
   REGARM32_FP64_TABLE
 #undef X
       Encoded_Not_DReg = -1
-  };
+};
 
-  /// An enum of 128-bit Q-Registers. The enum value does match the encoding
-  /// used to binary encode register operands in instructions.
-  enum QRegister {
+/// An enum of 128-bit Q-Registers. The enum value does match the encoding
+/// used to binary encode register operands in instructions.
+enum QRegister {
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
   Encoded_##val = encode,
   REGARM32_VEC128_TABLE
 #undef X
       Encoded_Not_QReg = -1
-  };
+};
 
-  static constexpr struct TableType {
+extern struct RegTableType {
   const char *Name;
   unsigned Encoding : 10;
   unsigned CCArg : 6;
@@ -133,31 +100,15 @@ public:
   SizeT NumAliases : (NUM_ALIASES_BITS + 1);
   uint16_t Aliases[1 << NUM_ALIASES_BITS];
 #undef NUM_ALIASES_BITS
-  } Table[Reg_NUM] = {
-#define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
-          isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
-  {                                                                            \
-    name, encode, cc_arg, scratch, preserved, stackptr, frameptr, isGPR,       \
-        isInt, isI64Pair, isFP32, isFP64, isVec128,                            \
-        (SizeOf alias_init).size(), alias_init                                 \
-  }                                                                            \
-  ,
-      REGARM32_TABLE
-#undef X
-  };
+} RegTable[Reg_NUM];
 
-  static inline void assertRegisterDefined(int32_t RegNum) {
-    (void)RegNum;
+static inline bool isGPRegister(int32_t RegNum) {
   assert(RegNum >= 0);
   assert(RegNum < Reg_NUM);
-  }
+  return RegTable[RegNum].IsGPR;
+}
 
-  static inline bool isGPRegister(int32_t RegNum) {
-    assertRegisterDefined(RegNum);
-    return Table[RegNum].IsGPR;
-  }
-
-  static constexpr SizeT getNumGPRegs() {
+static constexpr inline SizeT getNumGPRegs() {
   return 0
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
@@ -165,14 +116,15 @@ public:
       REGARM32_TABLE
 #undef X
       ;
-  }
+}
 
-  static inline GPRRegister getEncodedGPR(int32_t RegNum) {
-    assert(isGPRegister(RegNum));
-    return GPRRegister(Table[RegNum].Encoding);
-  }
+static inline GPRRegister getEncodedGPR(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return GPRRegister(RegTable[RegNum].Encoding);
+}
 
-  static constexpr SizeT getNumGPRs() {
+static constexpr inline SizeT getNumGPRs() {
   return 0
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
@@ -180,39 +132,39 @@ public:
       REGARM32_TABLE
 #undef X
       ;
-  }
+}
 
-  static inline bool isGPR(SizeT RegNum) {
-    assertRegisterDefined(RegNum);
-    return Table[RegNum].IsGPR;
-  }
-
-  static inline IceString getGPRName(SizeT RegNum) {
-    assert(isGPR(RegNum));
-    return Table[RegNum].Name;
-  }
+static inline bool isGPR(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return RegTable[RegNum].IsGPR;
+}
 
-  static inline GPRRegister getI64PairFirstGPRNum(int32_t RegNum) {
-    assert(isI64RegisterPair(RegNum));
-    return GPRRegister(Table[RegNum].Encoding);
-  }
+static inline GPRRegister getI64PairFirstGPRNum(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return GPRRegister(RegTable[RegNum].Encoding);
+}
 
-  static inline GPRRegister getI64PairSecondGPRNum(int32_t RegNum) {
-    assert(isI64RegisterPair(RegNum));
-    return GPRRegister(Table[RegNum].Encoding + 1);
-  }
+static inline GPRRegister getI64PairSecondGPRNum(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return GPRRegister(RegTable[RegNum].Encoding + 1);
+}
 
-  static inline bool isI64RegisterPair(int32_t RegNum) {
-    assertRegisterDefined(RegNum);
-    return Table[RegNum].IsI64Pair;
-  }
+static inline bool isI64RegisterPair(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return RegTable[RegNum].IsI64Pair;
+}
 
-  static inline bool isEncodedSReg(int32_t RegNum) {
-    assertRegisterDefined(RegNum);
-    return Table[RegNum].IsFP32;
-  }
+static inline bool isEncodedSReg(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return RegTable[RegNum].IsFP32;
+}
 
-  static constexpr SizeT getNumSRegs() {
+static constexpr inline SizeT getNumSRegs() {
   return 0
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
@@ -220,24 +172,21 @@ public:
       REGARM32_TABLE
 #undef X
       ;
-  }
+}
 
-  static inline IceString getSRegName(SizeT RegNum) {
-    assert(isEncodedSReg(RegNum));
-    return Table[RegNum].Name;
-  }
-
-  static inline SRegister getEncodedSReg(int32_t RegNum) {
-    assert(isEncodedSReg(RegNum));
-    return SRegister(Table[RegNum].Encoding);
-  }
+static inline SRegister getEncodedSReg(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return SRegister(RegTable[RegNum].Encoding);
+}
 
-  static inline bool isEncodedDReg(int32_t RegNum) {
-    assertRegisterDefined(RegNum);
-    return Table[RegNum].IsFP64;
-  }
+static inline bool isEncodedDReg(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return RegTable[RegNum].IsFP64;
+}
 
-  static constexpr inline SizeT getNumDRegs() {
+static constexpr inline SizeT getNumDRegs() {
   return 0
 #define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
           isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
@@ -245,32 +194,35 @@ public:
       REGARM32_TABLE
 #undef X
       ;
-  }
+}
 
-  static inline DRegister getEncodedDReg(int32_t RegNum) {
-    assert(isEncodedDReg(RegNum));
-    return DRegister(Table[RegNum].Encoding);
-  }
+static inline DRegister getEncodedDReg(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return DRegister(RegTable[RegNum].Encoding);
+}
 
-  static inline bool isEncodedQReg(int32_t RegNum) {
-    assertRegisterDefined(RegNum);
-    return Table[RegNum].IsVec128;
-  }
+static inline bool isEncodedQReg(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return RegTable[RegNum].IsVec128;
+}
 
-  static inline QRegister getEncodedQReg(int32_t RegNum) {
+static inline QRegister getEncodedQReg(int32_t RegNum) {
   assert(isEncodedQReg(RegNum));
-    return QRegister(Table[RegNum].Encoding);
-  }
+  return QRegister(RegTable[RegNum].Encoding);
+}
 
-  static inline IceString getRegName(int32_t RegNum) {
-    assertRegisterDefined(RegNum);
-    return Table[RegNum].Name;
-  }
-};
+static inline IceString getRegName(int32_t RegNum) {
+  assert(RegNum >= 0);
+  assert(RegNum < Reg_NUM);
+  return RegTable[RegNum].Name;
+}
 
 // Extend enum RegClass with ARM32-specific register classes (if any).
 enum RegClassARM32 : uint8_t { RCARM32_NUM = RC_Target };
 
+} // end of namespace RegARM32
 } // end of namespace ARM32
 } // end of namespace Ice
 

src/IceTargetLoweringARM32.cpp

@@ -53,13 +53,55 @@ createTargetHeaderLowering(::Ice::GlobalContext *Ctx) {
 void staticInit(const ::Ice::ClFlags &Flags) {
   ::Ice::ARM32::TargetARM32::staticInit(Flags);
 }
+
 } // end of namespace ARM32
 
 namespace Ice {
 namespace ARM32 {
 
+namespace {
+
+/// SizeOf is used to obtain the size of an initializer list as a constexpr
+/// expression. This is only needed until our C++ library is updated to
+/// C++ 14 -- which defines constexpr members to std::initializer_list.
+class SizeOf {
+  SizeOf(const SizeOf &) = delete;
+  SizeOf &operator=(const SizeOf &) = delete;
+
+public:
+  constexpr SizeOf() : Size(0) {}
+  template <typename... T>
+  explicit constexpr SizeOf(T...)
+      : Size(__length<T...>::value) {}
+  constexpr SizeT size() const { return Size; }
+
+private:
+  template <typename T, typename... U> struct __length {
+    static constexpr std::size_t value = 1 + __length<U...>::value;
+  };
+
+  template <typename T> struct __length<T> {
+    static constexpr std::size_t value = 1;
+  };
+
+  const std::size_t Size;
+};
+
+} // end of anonymous namespace
+
 // Defines the RegARM32::Table table with register information.
-constexpr RegARM32::TableType RegARM32::Table[];
+RegARM32::RegTableType RegARM32::RegTable[RegARM32::Reg_NUM] = {
+#define X(val, encode, name, cc_arg, scratch, preserved, stackptr, frameptr,   \
+          isGPR, isInt, isI64Pair, isFP32, isFP64, isVec128, alias_init)       \
+  {                                                                            \
+    name, encode, cc_arg, scratch, preserved, stackptr, frameptr, isGPR,       \
+        isInt, isI64Pair, isFP32, isFP64, isVec128,                            \
+        (SizeOf alias_init).size(), alias_init                                 \
+  }                                                                            \
+  ,
+    REGARM32_TABLE
+#undef X
+};
 
 namespace {
 
@@ -246,7 +288,7 @@ void TargetARM32::staticInit(const ClFlags &Flags) {
   llvm::SmallBitVector InvalidRegisters(RegARM32::Reg_NUM);
   ScratchRegs.resize(RegARM32::Reg_NUM);
   for (int i = 0; i < RegARM32::Reg_NUM; ++i) {
-    const auto &Entry = RegARM32::Table[i];
+    const auto &Entry = RegARM32::RegTable[i];
     IntegerRegisters[i] = Entry.IsInt;
     I64PairRegisters[i] = Entry.IsI64Pair;
     Float32Registers[i] = Entry.IsFP32;
@@ -1833,7 +1875,7 @@ llvm::SmallBitVector TargetARM32::getRegisterSet(RegSetMask Include,
   llvm::SmallBitVector Registers(RegARM32::Reg_NUM);
 
   for (int i = 0; i < RegARM32::Reg_NUM; ++i) {
-    const auto &Entry = RegARM32::Table[i];
+    const auto &Entry = RegARM32::RegTable[i];
     if (Entry.Scratch && (Include & RegSet_CallerSave))
       Registers[i] = true;
     if (Entry.Preserved && (Include & RegSet_CalleeSave))

src/IceTargetLoweringARM32.h

@@ -1012,7 +1012,7 @@ protected:
   bool PrologEmitsFixedAllocas = false;
   uint32_t MaxOutArgsSizeBytes = 0;
   // TODO(jpp): std::array instead of array.
-  static llvm::SmallBitVector TypeToRegisterSet[RCARM32_NUM];
+  static llvm::SmallBitVector TypeToRegisterSet[RegARM32::RCARM32_NUM];
   static llvm::SmallBitVector RegisterAliases[RegARM32::Reg_NUM];
   static llvm::SmallBitVector ScratchRegs;
   llvm::SmallBitVector RegsUsed;