[CHERI] Generate the FIRST_CAPABILITY_VALUETYPE and LAST_CAPABILITY_VALUETYPE sentinels from TableGen

Author: resistor

llvm/include/llvm/CodeGen/ValueTypes.td

@@ -28,7 +28,7 @@ class ValueType<int size, int value> {
   // Indicates this VT should be included in the
   // [FIRST_VALUETYPE,LAST_VALUETYPE] range.
   bit isNormalValueType = true;
-  int isCapability = false;
+  bit isCapability = false;
 }
 
 class VTAny<int value> : ValueType<0, value> {

llvm/include/llvm/CodeGenTypes/MachineValueType.h

@@ -47,10 +47,6 @@ namespace llvm {
 #undef GET_VT_ATTR
 #undef GET_VT_RANGES
 
-      // CHERI-TODO: Integrate this properly into tablegen
-      FIRST_CAPABILITY_VALUETYPE = c64,
-      LAST_CAPABILITY_VALUETYPE = c256,
-
       VALUETYPE_SIZE = LAST_VALUETYPE + 1,
     };
 

llvm/utils/TableGen/Basic/VTEmitter.cpp

@@ -132,6 +132,7 @@ void VTEmitter::run(raw_ostream &OS) {
     bool IsVector = VT->getValueAsBit("isVector");
     bool IsScalable = VT->getValueAsBit("isScalable");
     bool IsRISCVVecTuple = VT->getValueAsBit("isRISCVVecTuple");
+    bool IsCapability = VT->getValueAsBit("isCapability");
     int64_t NF = VT->getValueAsInt("NF");
     bool IsNormalValueType =  VT->getValueAsBit("isNormalValueType");
     int64_t NElem = IsVector ? VT->getValueAsInt("nElem") : 0;
@@ -152,6 +153,7 @@ void VTEmitter::run(raw_ostream &OS) {
     UpdateVTRange("INTEGER_VALUETYPE", Name, IsInteger && !IsVector);
     UpdateVTRange("FP_VALUETYPE", Name, IsFP && !IsVector);
     UpdateVTRange("VALUETYPE", Name, IsNormalValueType);
+    UpdateVTRange("CAPABILITY_VALUETYPE", Name, IsCapability);
 
     // clang-format off
     OS << "  GET_VT_ATTR("