[OPENMP] Initial codegen for `teams distribute simd` directive.

Host + default devices codegen for `teams distribute simd` directive.

llvm-svn: 319896
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index a06dd8c..eaf0f93 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -2075,7 +2075,8 @@
   case OMPD_parallel_for_simd:
   case OMPD_parallel_sections:
   case OMPD_teams:
-  case OMPD_teams_distribute: {
+  case OMPD_teams_distribute:
+  case OMPD_teams_distribute_simd: {
     QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1);
     QualType KmpInt32PtrTy =
         Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
@@ -2198,7 +2199,6 @@
   }
   case OMPD_distribute_parallel_for_simd:
   case OMPD_distribute_parallel_for:
-  case OMPD_teams_distribute_simd:
   case OMPD_target_teams_distribute:
   case OMPD_target_teams_distribute_parallel_for:
   case OMPD_target_teams_distribute_parallel_for_simd:
@@ -7101,13 +7101,25 @@
   // The point of exit cannot be a branch out of the structured block.
   // longjmp() and throw() must not violate the entry/exit criteria.
   CS->getCapturedDecl()->setNothrow();
+  for (int ThisCaptureLevel =
+           getOpenMPCaptureLevels(OMPD_teams_distribute_simd);
+       ThisCaptureLevel > 1; --ThisCaptureLevel) {
+    CS = cast<CapturedStmt>(CS->getCapturedStmt());
+    // 1.2.2 OpenMP Language Terminology
+    // Structured block - An executable statement with a single entry at the
+    // top and a single exit at the bottom.
+    // The point of exit cannot be a branch out of the structured block.
+    // longjmp() and throw() must not violate the entry/exit criteria.
+    CS->getCapturedDecl()->setNothrow();
+  }
+
 
   OMPLoopDirective::HelperExprs B;
   // In presence of clause 'collapse' with number of loops, it will
   // define the nested loops number.
   unsigned NestedLoopCount = CheckOpenMPLoop(
       OMPD_teams_distribute_simd, getCollapseNumberExpr(Clauses),
-      nullptr /*ordered not a clause on distribute*/, AStmt, *this, *DSAStack,
+      nullptr /*ordered not a clause on distribute*/, CS, *this, *DSAStack,
       VarsWithImplicitDSA, B);
 
   if (NestedLoopCount == 0)