[OPENMP] Codegen for reduction clauses in 'taskloop' directives.

Adds codegen for taskloop-based directives.

llvm-svn: 308174
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 1e0b6c15..b1c5762 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -1807,6 +1807,8 @@
         std::make_pair(".lb.", KmpUInt64Ty),
         std::make_pair(".ub.", KmpUInt64Ty), std::make_pair(".st.", KmpInt64Ty),
         std::make_pair(".liter.", KmpInt32Ty),
+        std::make_pair(".reductions.",
+                       Context.VoidPtrTy.withConst().withRestrict()),
         std::make_pair(StringRef(), QualType()) // __context with shared vars
     };
     ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,