Expand the Flags field of MCInstrDesc to 64 bits, while simultaneously

shrinking the Size and NumDefs fields to offset the size growth, and
reordering the fields to preserve a good packing.

This is necessary in the short term for adding a convergent flag, and
simultaneously future-proofs us against more flags being added in the
future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238445 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCInstrDesc.h

@@ -138,10 +138,10 @@ class MCInstrDesc {
 public:
   unsigned short Opcode;        // The opcode number
   unsigned short NumOperands;   // Num of args (may be more if variable_ops)
-  unsigned short NumDefs;       // Num of args that are definitions
+  unsigned char NumDefs;        // Num of args that are definitions
+  unsigned char Size;           // Number of bytes in encoding.
   unsigned short SchedClass;    // enum identifying instr sched class
-  unsigned short Size;          // Number of bytes in encoding.
-  unsigned Flags;               // Flags identifying machine instr class
+  uint64_t Flags;               // Flags identifying machine instr class
   uint64_t TSFlags;             // Target Specific Flag values
   const uint16_t *ImplicitUses; // Registers implicitly read by this instr
   const uint16_t *ImplicitDefs; // Registers implicitly defined by this instr

utils/TableGen/InstrInfoEmitter.cpp

@@ -475,8 +475,8 @@ void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
   OS << "  { ";
   OS << Num << ",\t" << MinOperands << ",\t"
      << Inst.Operands.NumDefs << ",\t"
-     << SchedModels.getSchedClassIdx(Inst) << ",\t"
-     << Inst.TheDef->getValueAsInt("Size") << ",\t0";
+     << Inst.TheDef->getValueAsInt("Size") << ",\t"
+     << SchedModels.getSchedClassIdx(Inst) << ",\t0";
 
   // Emit all of the target independent flags...
   if (Inst.isPseudo)           OS << "|(1<<MCID::Pseudo)";