Add a Force option to raw_fd_ostream to specify whether opening

an existing file is considered an error. Convert several tools
to use raw_fd_ostream instead of std::ostream, and to use this
new option instead of doing a manual check.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75801 91177308-0d34-0410-b5e6-96231b3b80d8

tools/lto/LTOCodeGenerator.cpp

@@ -186,7 +186,8 @@ const void* LTOCodeGenerator::compile(size_t* length, std::string& errMsg)
     bool genResult = false;
     {
       raw_fd_ostream asmFD(raw_fd_ostream(uniqueAsmPath.c_str(),
-                                          false, errMsg));
+                                          /*Binary=*/false, /*Force=*/true,
+                                          errMsg));
       formatted_raw_ostream asmFile(asmFD);
       if (!errMsg.empty())
         return NULL;