Add initial version of rtl.vim syntax file.

2018-06-19  Martin Liska  <mliska@suse.cz>

	* gcc-rtl.vim: New file.

From-SVN: r261741

contrib/ChangeLog

+2018-06-19  Martin Liska  <mliska@suse.cz>
+
+	* gcc-rtl.vim: New file.
+
 2018-06-12  Jeff Law  <law@redhat.com>
 
 	* config-list.mk (LIST): Remove alpha-freebsd6.

contrib/gcc-rtl.vim

+" Syntax highlighting rules for RTL dump files (for Vim).
+"
+" Copyright (C) 2018 Free Software Foundation, Inc.
+"
+" This script is free software; you can redistribute it and/or modify
+" it under the terms of the GNU General Public License as published by
+" the Free Software Foundation; either version 3, or (at your option)
+" any later version
+"
+" For more instructions please see gimple.vim file in the same folder.
+
+
+" Do not continue, if syntax is already enabled in current buffer.
+if exists("b:current_syntax")
+    finish
+endif
+
+" General-purpose comments.
+syn match   rtlComment          ";;.*$"
+
+syn keyword rtlInstruction      debug_expr insn_list int_list sequence
+                                \ address debug_insn insn expr_list
+                                \ jump_table_data barrier code_label
+                                \ cond_exec parallel asm_input asm_operands
+                                \ unspec unspec_volatile addr_vec
+                                \ addr_diff_vec prefetch set use clobber
+                                \ call return simple_return eh_return
+                                \ trap_if scratch strict_low_part concat concatn
+                                \ mem label_ref symbol_ref cc0 compare plus minus
+                                \ neg mult ss_mult us_mult div ss_div us_div mod
+                                \ udiv umod and ior xor not ashift rotate ashiftrt
+                                \ lshiftrt rotatert smin smax umin umax pre_dec
+                                \ pre_inc post_dec post_inc pre_modify post_modify
+                                \ unordered ordered uneq unge ungt unle unlt ltgt sign_extend
+                                \ zero_extend truncate float_extend float_truncate
+                                \ float fix unsigned_float unsigned_fix fract_convert
+                                \ unsigned_fract_convert sat_fract unsigned_sat_fract
+                                \ abs sqrt bswap ffs clrsb clz ctz popcount parity
+                                \ sign_extract zero_extract high lo_sum vec_merge
+                                \ vec_select vec_concat vec_duplicate vec_series ss_plus
+                                \ us_plus ss_minus ss_neg us_neg ss_abs ss_ashift
+                                \ us_ashift us_minus ss_truncate us_truncate fma
+                                \ entry_value exclusion_set presence_set final_presence_set
+                                \ absence_set final_absence_set automata_option attr set_attr
+                                \ set_attr_alternative eq_attr eq_attr_alt attr_flag cond
+syn keyword rtlConditional      call_insn jump_insn if_then_else
+                                \ eq ne gt gtu lt ltu ge geu le leu
+syn keyword rtlNote             note barrier code_label
+syn keyword rtlVariableLoation  var_location
+syn keyword rtlPcRegister       pc
+
+syn keyword rtlModes		        VOID BLK BI QI HI SI DI TI SF DF CC QQ HQ SQ
+                                \ DQ TQ UQQ UHQ USQ UDQ UTQ HA SA DA TA UHA
+                                \ USA UDA UTA SD DD TD
+
+" String literals
+syn region  rtlString           start=/\v"/ skip=/\v\\./ end=/\v"/
+
+syn match   rtlNoteInsn         "NOTE_INSN_[A-Z_]*"
+syn match   rtlIntegerConstant  "\vconst_int -?\d+"
+syn match   rtlFloatConstant    "\vconst_double:[A-Z]+ -?\d*\.\d+(e\+\d+)?"
+syn match   rtlRegister         "\vreg(\/[a-z])?:[A-Z0-9]+ \d+ [a-z0-9]+"
+syn match   rtlLocation         /\v"[^"]*":\d+/
+
+hi def link rtlInstruction      Statement
+hi def link rtlConditional      Conditional
+hi def link rtlNote             Debug
+hi def link rtlNoteInsn         Debug
+hi def link rtlIntegerConstant  Number
+hi def link rtlFloatConstant    Number
+hi def link rtlRegister         Type
+hi def link rtlPcRegister       Type
+hi def link rtlModes            Type
+hi def link rtlVariableLoation  Debug
+hi def link rtlComment          Comment
+hi def link rtlLocation         Debug
+hi def link rtlString           String
+
+let b:current_syntax = "gcc-rtl"