llvm-project/llvm/utils/emacs/emacs.el

;; LLVM coding style guidelines in emacs
;; Maintainer: LLVM Team, http://llvm.org/

(defun llvm-lineup-statement (langelem)
  (let ((in-assign (c-lineup-assignments langelem)))
    (if (not in-assign)
        '++
      (aset in-assign 0
            (+ (aref in-assign 0)
               (* 2 c-basic-offset)))
      in-assign)))

;; Add a cc-mode style for editing LLVM C and C++ code
(c-add-style "llvm.org"
             '("gnu"
	       (fill-column . 80)
	       (c++-indent-level . 2)
	       (c-basic-offset . 2)
	       (indent-tabs-mode . nil)
	       (c-offsets-alist . ((arglist-intro . ++)
				   (innamespace . 0)
				   (member-init-intro . ++)
				   (statement-cont . llvm-lineup-statement)))))

;; Files with "llvm" in their names will automatically be set to the
;; llvm.org coding style.
(add-hook 'c-mode-common-hook
	  (function
	   (lambda nil 
	     (if (string-match "llvm" buffer-file-name)
		 (progn
		   (c-set-style "llvm.org"))))))