[lldb] Remove FileSpecList::GetFileSpecPointerAtIndex (NFC)

There's only one use and it eventually converts the pointer into a
reference. Simplify things and always use references.

(cherry picked from commit f9632ce)

Author: JDevlieghere

lldb/include/lldb/Target/Target.h

@@ -768,7 +768,7 @@ class Target : public std::enable_shared_from_this<Target>,
   // Use this to create a breakpoint from a load address and a module file spec
   lldb::BreakpointSP CreateAddressInModuleBreakpoint(lldb::addr_t file_addr,
                                                      bool internal,
-                                                     const FileSpec *file_spec,
+                                                     const FileSpec &file_spec,
                                                      bool request_hardware);
 
   // Use this to create Address breakpoints:

lldb/include/lldb/Utility/FileSpecList.h

@@ -155,19 +155,6 @@ class FileSpecList {
   ///     returned.
   const FileSpec &GetFileSpecAtIndex(size_t idx) const;
 
-  /// Get file specification pointer at index.
-  ///
-  /// Gets a file from the file list. The file objects that are returned can
-  /// be tested using FileSpec::operator void*().
-  ///
-  /// \param[in] idx
-  ///     An index into the file list.
-  ///
-  /// \return
-  ///     A pointer to a contained FileSpec object at index \a idx.
-  ///     If \a idx is out of range, then an NULL is returned.
-  const FileSpec *GetFileSpecPointerAtIndex(size_t idx) const;
-
   /// Get the memory cost of this object.
   ///
   /// Return the size in bytes that this object takes in memory. This returns

lldb/source/Commands/CommandObjectBreakpoint.cpp

@@ -608,8 +608,8 @@ class CommandObjectBreakpointSet : public CommandObjectParsed {
       //  will track the load location of the library.
       size_t num_modules_specified = m_options.m_modules.GetSize();
       if (num_modules_specified == 1) {
-        const FileSpec *file_spec =
-            m_options.m_modules.GetFileSpecPointerAtIndex(0);
+        const FileSpec &file_spec =
+            m_options.m_modules.GetFileSpecAtIndex(0);
         bp_sp = target.CreateAddressInModuleBreakpoint(
             m_options.m_load_addr, internal, file_spec, m_options.m_hardware);
       } else if (num_modules_specified == 0) {

lldb/source/Target/Target.cpp

@@ -465,12 +465,12 @@ BreakpointSP Target::CreateBreakpoint(const Address &addr, bool internal,
 
 lldb::BreakpointSP
 Target::CreateAddressInModuleBreakpoint(lldb::addr_t file_addr, bool internal,
-                                        const FileSpec *file_spec,
+                                        const FileSpec &file_spec,
                                         bool request_hardware) {
   SearchFilterSP filter_sp(
       new SearchFilterForUnconstrainedSearches(shared_from_this()));
   BreakpointResolverSP resolver_sp(new BreakpointResolverAddress(
-      nullptr, file_addr, file_spec ? *file_spec : FileSpec()));
+      nullptr, file_addr, file_spec));
   return CreateBreakpoint(filter_sp, resolver_sp, internal, request_hardware,
                           false);
 }

lldb/source/Utility/FileSpecList.cpp

@@ -140,12 +140,6 @@ const FileSpec &FileSpecList::GetFileSpecAtIndex(size_t idx) const {
   return g_empty_file_spec;
 }
 
-const FileSpec *FileSpecList::GetFileSpecPointerAtIndex(size_t idx) const {
-  if (idx < m_files.size())
-    return &m_files[idx];
-  return nullptr;
-}
-
 // Return the size in bytes that this object takes in memory. This returns the
 // size in bytes of this object's member variables and any FileSpec objects its
 // member variables contain, the result doesn't not include the string values