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5ab54d488f
and extern_weak_odr. These are the same as the non-odr versions, except that they indicate that the global will only be overridden by an *equivalent* global. In C, a function with weak linkage can be overridden by a function which behaves completely differently. This means that IP passes have to skip weak functions, since any deductions made from the function definition might be wrong, since the definition could be replaced by something completely different at link time. This is not allowed in C++, thanks to the ODR (One-Definition-Rule): if a function is replaced by another at link-time, then the new function must be the same as the original function. If a language knows that a function or other global can only be overridden by an equivalent global, it can give it the weak_odr linkage type, and the optimizers will understand that it is alright to make deductions based on the function body. The code generators on the other hand map weak and weak_odr linkage to the same thing. llvm-svn: 66339
129 lines
5.3 KiB
EmacsLisp
129 lines
5.3 KiB
EmacsLisp
;; Maintainer: The LLVM team, http://llvm.org/
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;; Description: Major mode for the LLVM assembler language.
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;; Updated: 2007-09-19
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;; Create mode-specific tables.
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(defvar llvm-mode-syntax-table nil
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"Syntax table used while in LLVM mode.")
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(defvar llvm-font-lock-keywords
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(list
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;; Comments
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'(";.*" . font-lock-comment-face)
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;; Variables
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'("%[-a-zA-Z$\._][-a-zA-Z$\._0-9]*" . font-lock-variable-name-face)
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;; Labels
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'("[-a-zA-Z$\._0-9]+:" . font-lock-variable-name-face)
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;; Strings
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'("\"[^\"]+\"" . font-lock-string-face)
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;; Unnamed variable slots
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'("%[-]?[0-9]+" . font-lock-variable-name-face)
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;; Types
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'("\\bvoid\\b\\|\\bi[0-9]+\\b\\|\\float\\b\\|\\bdouble\\b\\|\\btype\\b\\|\\blabel\\b\\|\\bopaque\\b" . font-lock-type-face)
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;; Integer literals
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'("\\b[-]?[0-9]+\\b" . font-lock-preprocessor-face)
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;; Floating point constants
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'("\\b[-+]?[0-9]+\.[0-9]*\([eE][-+]?[0-9]+\)?\\b" . font-lock-preprocessor-face)
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;; Hex constants
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'("\\b0x[0-9A-Fa-f]+\\b" . font-lock-preprocessor-face)
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;; Keywords
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'("\\bbegin\\b\\|\\bend\\b\\|\\btrue\\b\\|\\bfalse\\b\\|\\bzeroinitializer\\b\\|\\bdeclare\\b\\|\\bdefine\\b\\|\\bglobal\\b\\|\\bconstant\\b\\|\\bconst\\b\\|\\binternal\\b\\|\\blinkonce\\b\\|\\blinkonce_odr\\b\\|\\bweak\\b\\|\\bweak_odr\\b\\|\\bappending\\b\\|\\buninitialized\\b\\|\\bimplementation\\b\\|\\b\\.\\.\\.\\b\\|\\bnull\\b\\|\\bundef\\b\\|\\bto\\b\\|\\bexcept\\b\\|\\bnot\\b\\|\\btarget\\b\\|\\bendian\\b\\|\\blittle\\b\\|\\bbig\\b\\|\\bpointersize\\b\\|\\bdeplibs\\b\\|\\bvolatile\\b\\|\\bfastcc\\b\\|\\bcoldcc\\b\\|\\bcc\\b" . font-lock-keyword-face)
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;; Arithmetic and Logical Operators
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'("\\badd\\b\\|\\bsub\\b\\|\\bmul\\b\\|\\bdiv\\b\\|\\brem\\b\\|\\band\\b\\|\\bor\\b\\|\\bxor\\b\\|\\bset\\(ne\\b\\|\\beq\\b\\|\\blt\\b\\|\\bgt\\b\\|\\ble\\b\\|\\bge\\b\\)" . font-lock-keyword-face)
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;; Special instructions
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'("\\bphi\\b\\|\\btail\\b\\|\\bcall\\b\\|\\bcast\\b\\|\\bselect\\b\\|\\bto\\b\\|\\bshl\\b\\|\\bshr\\b\\|\\bvaarg\\b\\|\\bvanext\\b" . font-lock-keyword-face)
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;; Control instructions
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'("\\bret\\b\\|\\bbr\\b\\|\\bswitch\\b\\|\\binvoke\\b\\|\\bunwind\\b\\|\\bunreachable\\b" . font-lock-keyword-face)
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;; Memory operators
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'("\\bmalloc\\b\\|\\balloca\\b\\|\\bfree\\b\\|\\bload\\b\\|\\bstore\\b\\|\\bgetelementptr\\b" . font-lock-keyword-face)
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)
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"Syntax highlighting for LLVM"
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)
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;; ---------------------- Syntax table ---------------------------
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;; Shamelessly ripped from jasmin.el
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;; URL: http://www.neilvandyke.org/jasmin-emacs/jasmin.el.html
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(if (not llvm-mode-syntax-table)
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(progn
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(setq llvm-mode-syntax-table (make-syntax-table))
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(mapcar (function (lambda (n)
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(modify-syntax-entry (aref n 0)
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(aref n 1)
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llvm-mode-syntax-table)))
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'(
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;; whitespace (` ')
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[?\^m " "]
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[?\f " "]
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[?\n " "]
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[?\t " "]
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[?\ " "]
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;; word constituents (`w')
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;;[?< "w"]
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;;[?> "w"]
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[?\% "w"]
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;;[?_ "w "]
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;; comments
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[?\; "< "]
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[?\n "> "]
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;;[?\r "> "]
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;;[?\^m "> "]
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;; symbol constituents (`_')
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;; punctuation (`.')
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;; open paren (`(')
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[?\( "("]
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[?\[ "("]
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[?\{ "("]
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;; close paren (`)')
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[?\) ")"]
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[?\] ")"]
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[?\} ")"]
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;; string quote ('"')
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[?\" "\""]
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))))
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;; --------------------- Abbrev table -----------------------------
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(defvar llvm-mode-abbrev-table nil
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"Abbrev table used while in LLVM mode.")
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(define-abbrev-table 'llvm-mode-abbrev-table ())
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(defvar llvm-mode-hook nil)
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(defvar llvm-mode-map nil) ; Create a mode-specific keymap.
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(if (not llvm-mode-map)
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() ; Do not change the keymap if it is already set up.
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(setq llvm-mode-map (make-sparse-keymap))
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(define-key llvm-mode-map "\t" 'tab-to-tab-stop)
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(define-key llvm-mode-map "\es" 'center-line)
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(define-key llvm-mode-map "\eS" 'center-paragraph))
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(defun llvm-mode ()
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"Major mode for editing LLVM source files.
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\\{llvm-mode-map}
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Runs llvm-mode-hook on startup."
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(interactive)
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(kill-all-local-variables)
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(use-local-map llvm-mode-map) ; Provides the local keymap.
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(setq major-mode 'llvm-mode)
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(make-local-variable 'font-lock-defaults)
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(setq major-mode 'llvm-mode ; This is how describe-mode
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; finds the doc string to print.
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mode-name "LLVM" ; This name goes into the modeline.
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font-lock-defaults `(llvm-font-lock-keywords))
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(setq local-abbrev-table llvm-mode-abbrev-table)
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(set-syntax-table llvm-mode-syntax-table)
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(setq comment-start ";")
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(run-hooks 'llvm-mode-hook)) ; Finally, this permits the user to
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; customize the mode with a hook.
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;; Associate .ll files with llvm-mode
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(setq auto-mode-alist
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(append '(("\\.ll$" . llvm-mode) ("\\.llx$" . llvm-mode)) auto-mode-alist))
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(provide 'llvm-mode)
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;; end of llvm-mode.el
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