[sil] Move alloc_box flags to SharedUInt8.

Author: gottesmm

include/swift/SIL/SILInstruction.h

@@ -2456,8 +2456,7 @@ class AllocBoxInst final
 
   TailAllocatedDebugVariable VarInfo;
 
-  unsigned HasDynamicLifetime : 1;
-  unsigned Reflection : 1;
+  USE_SHARED_UINT8;
 
   AllocBoxInst(SILDebugLocation DebugLoc, CanSILBoxType BoxType,
                ArrayRef<SILValue> TypeDependentOperands, SILFunction &F,
@@ -2475,13 +2474,20 @@ class AllocBoxInst final
     return getType().castTo<SILBoxType>();
   }
 
-  void setDynamicLifetime() { HasDynamicLifetime = true; }
-  bool hasDynamicLifetime() const { return HasDynamicLifetime; }
+  void setDynamicLifetime() {
+    sharedUInt8().AllocBoxInst.dynamicLifetime = true;
+  }
+
+  bool hasDynamicLifetime() const {
+    return sharedUInt8().AllocBoxInst.dynamicLifetime;
+  }
 
   /// True if the box should be emitted with reflection metadata for its
   /// contents.
-  bool emitReflectionMetadata() const { return Reflection; }
-  
+  bool emitReflectionMetadata() const {
+    return sharedUInt8().AllocBoxInst.reflection;
+  }
+
   // Return the type of the memory stored in the alloc_box.
   SILType getAddressType() const;
 

include/swift/SIL/SILNode.h

@@ -214,6 +214,10 @@ class alignas(8) SILNode :
                  usesMoveableValueDebugInfo : 1,
                  hasInvalidatedVarInfo : 1);
 
+    SHARED_FIELD(AllocBoxInst, uint8_t
+                 dynamicLifetime : 1,
+                 reflection : 1);
+
     SHARED_FIELD(AllocRefInstBase, uint8_t
       objC : 1,
       onStack : 1,

lib/SIL/IR/SILInstructions.cpp

@@ -375,13 +375,13 @@ bool AllocRefDynamicInst::isDynamicTypeDeinitAndSizeKnownEquivalentToBaseType()
 AllocBoxInst::AllocBoxInst(SILDebugLocation Loc, CanSILBoxType BoxType,
                            ArrayRef<SILValue> TypeDependentOperands,
                            SILFunction &F, Optional<SILDebugVariable> Var,
-                           bool hasDynamicLifetime,
-                           bool reflection)
+                           bool hasDynamicLifetime, bool reflection)
     : NullaryInstructionWithTypeDependentOperandsBase(
           Loc, TypeDependentOperands, SILType::getPrimitiveObjectType(BoxType)),
-      VarInfo(Var, getTrailingObjects<char>()),
-      HasDynamicLifetime(hasDynamicLifetime),
-      Reflection(reflection) {}
+      VarInfo(Var, getTrailingObjects<char>()) {
+  sharedUInt8().AllocBoxInst.dynamicLifetime = hasDynamicLifetime;
+  sharedUInt8().AllocBoxInst.reflection = reflection;
+}
 
 AllocBoxInst *AllocBoxInst::create(SILDebugLocation Loc,
                                    CanSILBoxType BoxType,