JIT: don't create vector constants from relocatable constants (#107491)

We can't represent relocations in data currently.

Fixes #107396.

Author: AndyAyersMS

src/coreclr/jit/lower.cpp

@@ -8962,12 +8962,22 @@ void Lowering::LowerStoreIndirCoalescing(GenTreeIndir* ind)
         assert(prevData.IsStore());
         assert(currData.IsStore());
 
-        // For now, only constants are supported for data.
+        // For now, only non-relocatable constants are supported for data.
         if (!prevData.value->OperIsConst() || !currData.value->OperIsConst())
         {
             return;
         }
 
+        if (prevData.value->IsCnsIntOrI() && prevData.value->AsIntCon()->ImmedValNeedsReloc(comp))
+        {
+            return;
+        }
+
+        if (currData.value->IsCnsIntOrI() && currData.value->AsIntCon()->ImmedValNeedsReloc(comp))
+        {
+            return;
+        }
+
         // Otherwise, the difference between two offsets has to match the size of the type.
         // We don't support overlapping stores.
         if (abs(prevData.offset - currData.offset) != (int)genTypeSize(prevData.targetType))