[clang][bytecode] Use OptPrimType instead of std::optional<PrimType> (#149812)

We use this construct a lot. Use something similar to clang's
UnsignedOrNone.

This results in some slighy compile time improvements:
https://llvm-compile-time-tracker.com/compare.php?from=17a4b0399d161a3b89d8f0ce82add1638f23f5d4&to=a251d81ecd0ed45dd190462663155fdb303ef04d&stat=instructions:u

1 files changed, 6 insertions, 6 deletions

diff --git a/clang/lib/AST/ByteCode/Pointer.cpp b/clang/lib/AST/ByteCode/Pointer.cpp
index c4d06d6..4019b74 100644
--- a/clang/lib/AST/ByteCode/Pointer.cpp
+++ b/clang/lib/AST/ByteCode/Pointer.cpp
@@ -665,7 +665,7 @@ std::optional<APValue> Pointer::toRValue(const Context &Ctx,
       return false;
 
     // Primitive values.
-    if (std::optional<PrimType> T = Ctx.classify(Ty)) {
+    if (OptPrimType T = Ctx.classify(Ty)) {
       TYPE_SWITCH(*T, R = Ptr.deref<T>().toAPValue(ASTCtx));
       return true;
     }
@@ -682,7 +682,7 @@ std::optional<APValue> Pointer::toRValue(const Context &Ctx,
           const Pointer &FP = Ptr.atField(F.Offset);
           QualType FieldTy = F.Decl->getType();
           if (FP.isActive()) {
-            if (std::optional<PrimType> T = Ctx.classify(FieldTy)) {
+            if (OptPrimType T = Ctx.classify(FieldTy)) {
               TYPE_SWITCH(*T, Value = FP.deref<T>().toAPValue(ASTCtx));
             } else {
               Ok &= Composite(FieldTy, FP, Value);
@@ -705,7 +705,7 @@ std::optional<APValue> Pointer::toRValue(const Context &Ctx,
           const Pointer &FP = Ptr.atField(FD->Offset);
           APValue &Value = R.getStructField(I);
 
-          if (std::optional<PrimType> T = Ctx.classify(FieldTy)) {
+          if (OptPrimType T = Ctx.classify(FieldTy)) {
             TYPE_SWITCH(*T, Value = FP.deref<T>().toAPValue(ASTCtx));
           } else {
             Ok &= Composite(FieldTy, FP, Value);
@@ -743,7 +743,7 @@ std::optional<APValue> Pointer::toRValue(const Context &Ctx,
       for (unsigned I = 0; I < NumElems; ++I) {
         APValue &Slot = R.getArrayInitializedElt(I);
         const Pointer &EP = Ptr.atIndex(I);
-        if (std::optional<PrimType> T = Ctx.classify(ElemTy)) {
+        if (OptPrimType T = Ctx.classify(ElemTy)) {
           TYPE_SWITCH(*T, Slot = EP.deref<T>().toAPValue(ASTCtx));
         } else {
           Ok &= Composite(ElemTy, EP.narrow(), Slot);
@@ -757,7 +757,7 @@ std::optional<APValue> Pointer::toRValue(const Context &Ctx,
       QualType ElemTy = CT->getElementType();
 
       if (ElemTy->isIntegerType()) {
-        std::optional<PrimType> ElemT = Ctx.classify(ElemTy);
+        OptPrimType ElemT = Ctx.classify(ElemTy);
         assert(ElemT);
         INT_TYPE_SWITCH(*ElemT, {
           auto V1 = Ptr.elem<T>(0);
@@ -803,7 +803,7 @@ std::optional<APValue> Pointer::toRValue(const Context &Ctx,
     return toAPValue(ASTCtx);
 
   // Just load primitive types.
-  if (std::optional<PrimType> T = Ctx.classify(ResultType)) {
+  if (OptPrimType T = Ctx.classify(ResultType)) {
     TYPE_SWITCH(*T, return this->deref<T>().toAPValue(ASTCtx));
   }