[RISCV] Move TargetOverlapConstraintType from RISCVVPseudo to TSFlags. NFC (#75877)

It can be more efficiently accessed from TSFlags and won't require extra
storage.

NFC because it wasn't exported to the cpp PseudoTable and isn't used in
tree yet.

Author: topperc

llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h

@@ -113,6 +113,15 @@ enum {
 
   UsesVXRMShift = HasRoundModeOpShift + 1,
   UsesVXRMMask = 1 << UsesVXRMShift,
+
+  // Indicates whether these instructions can partially overlap between source
+  // registers and destination registers according to the vector spec.
+  // 0 -> not a vector pseudo
+  // 1 -> default value for vector pseudos. not widening or narrowing.
+  // 2 -> narrowing case
+  // 3 -> widening case
+  TargetOverlapConstraintTypeShift = UsesVXRMShift + 1,
+  TargetOverlapConstraintTypeMask = 3ULL << TargetOverlapConstraintTypeShift,
 };
 
 enum VLMUL : uint8_t {

llvm/lib/Target/RISCV/RISCVInstrFormats.td

@@ -212,6 +212,15 @@ class RVInstCommon<dag outs, dag ins, string opcodestr, string argstr,
   // to the correct CSR.
   bit UsesVXRM = 0;
   let TSFlags{20} =  UsesVXRM;
+
+  // Indicates whther these instructions can partially overlap between source
+  // registers and destination registers according to the vector spec.
+  // 0 -> not a vector pseudo
+  // 1 -> default value for vector pseudos. not widening or narrowing.
+  // 2 -> narrowing case
+  // 3 -> widening case
+  bits<2> TargetOverlapConstraintType = 0;
+  let TSFlags{22-21} = TargetOverlapConstraintType;
 }
 
 class RVInst<dag outs, dag ins, string opcodestr, string argstr,

llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td

@@ -529,14 +529,6 @@ class RISCVVPseudo {
   // SEW = 0 is used to denote that the Pseudo is not SEW specific (or unknown).
   bits<8> SEW = 0;
   bit NeedBeInPseudoTable = 1;
-  // TargetOverlapConstraintType indicates that these instructions can 
-  // overlap between source operands and destination operands. 
-  // 1 -> default value, remain current constraint
-  // 2 -> narrow case
-  // 3 -> widen case
-  // TODO: Add TargetOverlapConstraintType into PseudosTable for further
-  // query.
-  bits<2> TargetOverlapConstraintType = 1;
 }
 
 // The actual table.