[OPENMP 4.1] Initial support for 'simdlen' clause.
Add parsing/sema analysis for 'simdlen' clause in simd directives. Also add check that if both 'safelen' and 'simdlen' clauses are specified, the value of 'simdlen' parameter is less than the value of 'safelen' parameter.

llvm-svn: 245692
diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
index ecf95c6..daa3dca 100644
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -2050,6 +2050,7 @@
   case OMPC_lastprivate:
   case OMPC_reduction:
   case OMPC_safelen:
+  case OMPC_simdlen:
   case OMPC_collapse:
   case OMPC_default:
   case OMPC_seq_cst: