From d9b11cf4df1f50eefab0f7eb14ec9c7dff6e153d Mon Sep 17 00:00:00 2001
From: Misha Brukman <brukman+llvm@gmail.com>
Date: Wed, 9 Oct 2002 00:30:20 +0000
Subject: [PATCH] Added a major mode for Emacs to edit LLVM assembler code with
 syntax highlighting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4092 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/emacs/llvm-mode.el | 130 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 utils/emacs/llvm-mode.el

diff --git a/utils/emacs/llvm-mode.el b/utils/emacs/llvm-mode.el
new file mode 100644
index 00000000000..9cea4165e2c
--- /dev/null
+++ b/utils/emacs/llvm-mode.el
@@ -0,0 +1,130 @@
+;; Author: Misha Brukman <brukman@cs.uiuc.edu>
+;; Description:
+;;         Major mode for the LLVM assembler language.
+;; Updated:
+;;         Oct 8, 2002
+;; Code:
+
+;; Create mode-specific tables.
+(defvar llvm-mode-syntax-table nil
+  "Syntax table used while in LLVM mode.")
+
+(defvar llvm-font-lock-keywords
+  (list
+   ;; Comments
+   '(";.*" . font-lock-comment-face)
+   ;; Variables
+   '("%[-a-zA-Z$\._][-a-zA-Z$\._0-9]*" . font-lock-variable-name-face)
+   ;; Labels
+   '("[-a-zA-Z$\._0-9]+:" . font-lock-variable-name-face)
+   ;; Strings
+   '("\"[^\"]+\"" . font-lock-string-face)
+   ;; Unnamed variable slots
+   '("%[-]?[0-9]+" . font-lock-variable-name-face)
+   ;; Integer literals
+   '("[-]?[0-9]+" . font-lock-preprocessor-face)
+   ;; Floating point constants
+   '("[-+]?[0-9]+\.[0-9]*\([eE][-+]?[0-9]+\)?" . font-lock-preprocessor-face)
+   ;; Hex constants
+   '("0x[0-9A-Fa-f]+" . font-lock-preprocessor-face)
+   ;; Keywords
+   '("begin\\|end\\|true\\|false\\|declare\\|global\\|constant\\|const\\|internal\\|implementation\\|\\.\\.\\.\\|null\\|to\\|except\\|not" . font-lock-keyword-face)
+   ;; Types
+   '("void\\|bool\\|sbyte\\|ubyte\\|u?short\\|u?int\\|u?long\\|float\\|double\\|type\\|label\\|opaque" . font-lock-type-face)
+   ;; Arithmetic and Logical Operators
+   '("add\\|sub\\|mul\\|div\\|rem\\|and\\|or\\|xor\\|set\\(ne\\|eq\\|lt\\|gt\\|le\\|ge\\)" . font-lock-keyword-face)
+   ;; Special instructions
+   '("phi\\|call\\|cast\\|shl\\|shr" . font-lock-keyword-face)
+   ;; Control instructions
+   '("ret\\|br\\|switch\\|invoke" . font-lock-keyword-face)
+   ;; Memory operators
+   '("malloc\\|alloca\\|free\\|load\\|store\\|getelementptr" . font-lock-keyword-face)
+   )
+  "Syntax highlighting for LLVM"
+  )
+
+;; ---------------------- Syntax table ---------------------------
+;; Shamelessly ripped from jasmin.el
+;; URL: http://www.neilvandyke.org/jasmin-emacs/jasmin.el.html
+
+(if (not llvm-mode-syntax-table)
+    (progn
+      (setq llvm-mode-syntax-table (make-syntax-table))
+      (mapcar (function (lambda (n)
+                          (modify-syntax-entry (aref n 0)
+                                               (aref n 1)
+                                               llvm-mode-syntax-table)))
+              '(
+                ;; whitespace (` ')
+                [?\^m " "]
+                [?\f  " "]
+                [?\n  " "]
+                [?\t  " "]
+                [?\   " "]
+                ;; word constituents (`w')
+                ;;[?<  "w"]
+                ;;[?>  "w"]
+                [?\%  "w"]
+                ;;[?_  "w  "]
+                ;; comments
+                [?\;  "< "]
+                [?\n  "> "]
+                ;;[?\r  "> "]
+                ;;[?\^m "> "]
+                ;; symbol constituents (`_')
+                ;; punctuation (`.')
+                ;; open paren (`(')
+                [?\( "("]
+                [?\[ "("]
+                [?\{ "("]
+                ;; close paren (`)')
+                [?\) ")"]
+                [?\] ")"]
+                [?\} ")"]
+                ;; string quote ('"')
+                [?\" "\""]
+                ))))
+
+;; --------------------- Abbrev table -----------------------------
+
+(defvar llvm-mode-abbrev-table nil
+  "Abbrev table used while in LLVM mode.")
+(define-abbrev-table 'llvm-mode-abbrev-table ())
+
+(defvar llvm-mode-hook nil)
+(defvar llvm-mode-map nil)   ; Create a mode-specific keymap.
+
+(if (not llvm-mode-map)
+    ()  ; Do not change the keymap if it is already set up.
+  (setq llvm-mode-map (make-sparse-keymap))
+  (define-key llvm-mode-map "\t" 'tab-to-tab-stop)
+  (define-key llvm-mode-map "\es" 'center-line)
+  (define-key llvm-mode-map "\eS" 'center-paragraph))
+
+
+(defun llvm-mode ()
+  "Major mode for editing LLVM source files.
+  \\{llvm-mode-map}
+  Runs llvm-mode-hook on startup."
+  (interactive)
+  (kill-all-local-variables)
+  (use-local-map llvm-mode-map)         ; Provides the local keymap.
+  (setq major-mode 'llvm-mode)          
+
+  (make-local-variable	'font-lock-defaults)
+  (setq major-mode 'llvm-mode           ; This is how describe-mode
+                                        ;   finds the doc string to print.
+	mode-name "LLVM"                ; This name goes into the modeline.
+	font-lock-defaults `(llvm-font-lock-keywords))
+
+  (setq local-abbrev-table llvm-mode-abbrev-table)
+  (set-syntax-table llvm-mode-syntax-table)
+  (run-hooks 'llvm-mode-hook))          ; Finally, this permits the user to
+                                        ;   customize the mode with a hook.
+
+;; Associate .ll files with llvm-mode
+(setq auto-mode-alist
+      (append '(("\\.ll$" . llvm-mode)) auto-mode-alist))
+
+(provide 'llvm-mode)
+;; end of llvm-mode.el