Remove obsolete comments about throwing exceptions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112874 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Bitcode/Archive.h

@@ -297,7 +297,7 @@ class Archive {
     /// its symbol table without reading in any of the archive's members. This
     /// reduces both I/O and cpu time in opening the archive if it is to be used
     /// solely for symbol lookup (e.g. during linking).  The \p Filename must
-    /// exist and be an archive file or an exception will be thrown. This form
+    /// exist and be an archive file or an error will be returned. This form
     /// of opening the archive is intended for read-only operations that need to
     /// locate members via the symbol table for link editing.  Since the archve
     /// members are not read by this method, the archive will appear empty upon
@@ -306,8 +306,7 @@ class Archive {
     /// if this form of opening the archive is used that only the symbol table
     /// lookup methods (getSymbolTable, findModuleDefiningSymbol, and
     /// findModulesDefiningSymbols) be used.
-    /// @throws std::string if an error occurs opening the file
+    /// @returns an Archive* that represents the archive file, or null on error.
-    /// @returns an Archive* that represents the archive file.
     /// @brief Open an existing archive and load its symbols.
     static Archive* OpenAndLoadSymbols(
       const sys::Path& Filename,   ///< Name of the archive file to open
@@ -319,7 +318,6 @@ class Archive {
     /// closes files. It does nothing with the archive file on disk. If you
     /// haven't used the writeToDisk method by the time the destructor is
     /// called, all changes to the archive will be lost.
-    /// @throws std::string if an error occurs
     /// @brief Destruct in-memory archive
     ~Archive();
 

include/llvm/Linker.h

@@ -158,7 +158,6 @@ class Linker {
     /// @returns true if an error occurred, false otherwise
     /// @see LinkItemKind
     /// @see getLastError
-    /// @throws nothing
     bool LinkInItems (
       const ItemList& Items, ///< Set of libraries/files to link in
       ItemList& NativeItems  ///< Output list of native files/libs

include/llvm/Support/TypeBuilder.h

@@ -73,7 +73,7 @@ namespace llvm {
 ///
 /// TypeBuilder cannot handle recursive types or types you only know at runtime.
 /// If you try to give it a recursive type, it will deadlock, infinitely
-/// recurse, or throw a recursive_init exception.
+/// recurse, or do something similarly undesirable.
 template<typename T, bool cross_compilable> class TypeBuilder {};
 
 // Types for use with cross-compilable TypeBuilders.  These correspond

include/llvm/System/Memory.h

@@ -63,7 +63,6 @@ namespace sys {
     ///
     /// On success, this returns false, otherwise it returns true and fills
     /// in *ErrMsg.
-    /// @throws std::string if an error occurred.
     /// @brief Release Read/Write/Execute memory.
     static bool ReleaseRWX(MemoryBlock &block, std::string *ErrMsg = 0);
     

include/llvm/System/Process.h

@@ -30,7 +30,6 @@ namespace sys {
       /// This static function will return the operating system's virtual memory
       /// page size.
       /// @returns The number of bytes in a virtual memory page.
-      /// @throws nothing
       /// @brief Get the virtual memory page size
       static unsigned GetPageSize();
 
@@ -38,7 +37,6 @@ namespace sys {
       /// by the process. This only counts the memory allocated via the malloc,
       /// calloc and realloc functions and includes any "free" holes in the
       /// allocated space.
-      /// @throws nothing
       /// @brief Return process memory usage.
       static size_t GetMallocUsage();
 

include/llvm/System/Program.h

@@ -116,7 +116,6 @@ namespace sys {
     /// locations to search (e.g. the PATH on Unix).
     /// @returns A Path object initialized to the path of the program or a
     /// Path object that is empty (invalid) if the program could not be found.
-    /// @throws nothing
     /// @brief Construct a Program by finding it by name.
     static Path FindProgramByName(const std::string& name);
 
@@ -129,7 +128,6 @@ namespace sys {
 
     /// A convenience function equivalent to Program prg; prg.Execute(..);
     /// prg.Wait(..);
-    /// @throws nothing
     /// @see Execute, Wait
     static int ExecuteAndWait(const Path& path,
                               const char** args,
@@ -140,7 +138,6 @@ namespace sys {
                               std::string* ErrMsg = 0);
 
     /// A convenience function equivalent to Program prg; prg.Execute(..);
-    /// @throws nothing
     /// @see Execute
     static void ExecuteNoWait(const Path& path,
                               const char** args,