[OPENMP 4.1] Initial support for modifiers in 'linear' clause.

OpenMP 4.1 adds 3 optional modifiers to 'linear' clause.
Format of 'linear' clause has changed to:
```
linear(linear-list[ : linear-step])
```
where linear-list is one of the following
```
list
modifier(list)
```
where modifier is one of the following:
```
 ref (C++)
 val (C/C++)
 uval (C++)
```
Patch adds parsing and sema analysis for these modifiers.

llvm-svn: 245550

1 files changed, 15 insertions, 2 deletions

diff --git a/clang/lib/Basic/OpenMPKinds.cpp b/clang/lib/Basic/OpenMPKinds.cpp
index b431598191a..3262eec9c2c 100644
--- a/clang/lib/Basic/OpenMPKinds.cpp
+++ b/clang/lib/Basic/OpenMPKinds.cpp
@@ -96,6 +96,11 @@ unsigned clang::getOpenMPSimpleClauseType(OpenMPClauseKind Kind,
 #define OPENMP_DEPEND_KIND(Name) .Case(#Name, OMPC_DEPEND_##Name)
 #include "clang/Basic/OpenMPKinds.def"
         .Default(OMPC_DEPEND_unknown);
+  case OMPC_linear:
+    return llvm::StringSwitch<OpenMPLinearClauseKind>(Str)
+#define OPENMP_LINEAR_KIND(Name) .Case(#Name, OMPC_LINEAR_##Name)
+#include "clang/Basic/OpenMPKinds.def"
+        .Default(OMPC_LINEAR_unknown);
   case OMPC_unknown:
   case OMPC_threadprivate:
   case OMPC_if:
@@ -108,7 +113,6 @@ unsigned clang::getOpenMPSimpleClauseType(OpenMPClauseKind Kind,
   case OMPC_lastprivate:
   case OMPC_shared:
   case OMPC_reduction:
-  case OMPC_linear:
   case OMPC_aligned:
   case OMPC_copyin:
   case OMPC_copyprivate:
@@ -170,6 +174,16 @@ const char *clang::getOpenMPSimpleClauseTypeName(OpenMPClauseKind Kind,
 #include "clang/Basic/OpenMPKinds.def"
     }
     llvm_unreachable("Invalid OpenMP 'schedule' clause type");
+  case OMPC_linear:
+    switch (Type) {
+    case OMPC_LINEAR_unknown:
+      return "unknown";
+#define OPENMP_LINEAR_KIND(Name)                                             \
+  case OMPC_LINEAR_##Name:                                                   \
+    return #Name;
+#include "clang/Basic/OpenMPKinds.def"
+    }
+    llvm_unreachable("Invalid OpenMP 'linear' clause type");
   case OMPC_unknown:
   case OMPC_threadprivate:
   case OMPC_if:
@@ -182,7 +196,6 @@ const char *clang::getOpenMPSimpleClauseTypeName(OpenMPClauseKind Kind,
   case OMPC_lastprivate:
   case OMPC_shared:
   case OMPC_reduction:
-  case OMPC_linear:
   case OMPC_aligned:
   case OMPC_copyin:
   case OMPC_copyprivate: