[vim] Recognize more FileCheck comments

Summary:
Currently vim syntax highlighting recognizes 'CHECK:' as a special
comment, but not CHECK-DAG, CHECK-NOT and other CHECKs. This patch
adds rules for these comments.

Reviewers: chandlerc, compnerd, rogfer01

Reviewed By: rogfer01

Subscribers: rogfer01, llvm-commits

Differential Revision: https://reviews.llvm.org/D43289

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325599 91177308-0d34-0410-b5e6-96231b3b80d8

Author: miyuki

utils/vim/syntax/llvm.vim

@@ -199,6 +199,7 @@ syn match  llvmSpecialComment /;\s*PR\d*\s*$/
 syn match  llvmSpecialComment /;\s*REQUIRES:.*$/
 syn match  llvmSpecialComment /;\s*RUN:.*$/
 syn match  llvmSpecialComment /;\s*CHECK:.*$/
+syn match  llvmSpecialComment "\v;\s*CHECK-(NEXT|NOT|DAG|SAME|LABEL):.*$"
 syn match  llvmSpecialComment /;\s*XFAIL:.*$/
 
 if version >= 508 || !exists("did_c_syn_inits")