.vimrc file to aid in LLVM coding standards conformance

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21496 91177308-0d34-0410-b5e6-96231b3b80d8

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+" LLVM coding guidelines conformance for VIM
+" Maintainer: LLVM Team, http://llvm.cs.uiuc.edu
+" Updated:    2005-04-24
+" WARNING:    Read before you source in all these commands and macros!  Some
+"             of them may change VIM behavior that you depend on and the
+"             settings here may depend on other settings that you may have.
+
+" Wrap text at 80 cols
+set textwidth=80
+
+" A tab produces a 2-space indentation
+set tabstop=2
+set shiftwidth=2
+set expandtab
+
+" Enable filetype detection
+filetype on
+
+" LLVM Makefiles can have names such as Makefile.rules or TEST.nightly.Makefile,
+" so it's important to categorize them as such.
+augroup filetype
+  au! BufRead,BufNewFile *Makefile*     set filetype=make
+augroup END
+
+" In Makefiles, don't expand tabs to spaces, since we need the actual tabs
+autocmd FileType make set noexpandtab
+
+" Useful macros for cleaning up code to conform to LLVM coding guidelines
+
+" Delete trailing whitespace and tabs at the end of each line
+map :dtws :%s/[\ \t]\+$//
+
+" Convert all tab characters to two spaces
+map :untab :%s/\t/  /g