Compress MCRegisterInfo register name tables.

Store (debugging) register names as offsets into a string table instead
of as char pointers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157449 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 5 deletions

diff --git a/include/llvm/MC/MCRegisterInfo.h b/include/llvm/MC/MCRegisterInfo.h
index 47f57495c1..db4164ad2a 100644
--- a/include/llvm/MC/MCRegisterInfo.h
+++ b/include/llvm/MC/MCRegisterInfo.h
@@ -106,10 +106,10 @@ public:
 /// of AX.
 ///
 struct MCRegisterDesc {
-  const char *Name;         // Printable name for the reg (for debugging)
-  uint32_t   Overlaps;      // Overlapping registers, described above
-  uint32_t   SubRegs;       // Sub-register set, described above
-  uint32_t   SuperRegs;     // Super-register set, described above
+  uint32_t Name;      // Printable name for the reg (for debugging)
+  uint32_t Overlaps;  // Overlapping registers, described above
+  uint32_t SubRegs;   // Sub-register set, described above
+  uint32_t SuperRegs; // Super-register set, described above
 };
 
 /// MCRegisterInfo base class - We assume that the target defines a static
@@ -143,6 +143,7 @@ private:
   const MCRegisterClass *Classes;             // Pointer to the regclass array
   unsigned NumClasses;                        // Number of entries in the array
   const uint16_t *RegLists;                   // Pointer to the reglists array
+  const char *RegStrings;                     // Pointer to the string table.
   const uint16_t *SubRegIndices;              // Pointer to the subreg lookup
                                               // array.
   unsigned NumSubRegIndices;                  // Number of subreg indices.
@@ -165,6 +166,7 @@ public:
   void InitMCRegisterInfo(const MCRegisterDesc *D, unsigned NR, unsigned RA,
                           const MCRegisterClass *C, unsigned NC,
                           const uint16_t *RL,
+                          const char *Strings,
                           const uint16_t *SubIndices,
                           unsigned NumIndices,
                           const uint16_t *RET) {
@@ -173,6 +175,7 @@ public:
     RAReg = RA;
     Classes = C;
     RegLists = RL;
+    RegStrings = Strings;
     NumClasses = NC;
     SubRegIndices = SubIndices;
     NumSubRegIndices = NumIndices;
@@ -301,7 +304,7 @@ public:
   /// getName - Return the human-readable symbolic target-specific name for the
   /// specified physical register.
   const char *getName(unsigned RegNo) const {
-    return get(RegNo).Name;
+    return RegStrings + get(RegNo).Name;
   }
 
   /// getNumRegs - Return the number of registers this target has (useful for