[OPENMP] Generalize codegen for 'sections'-based directive.
If 'sections' directive has only one sub-section, the code for 'single'-based directive was emitted. Removed this codegen, because it causes crashes in different cases.

llvm-svn: 258495
diff --git a/clang/test/OpenMP/cancellation_point_codegen.cpp b/clang/test/OpenMP/cancellation_point_codegen.cpp
index 795f69e..91e6c69 100644
--- a/clang/test/OpenMP/cancellation_point_codegen.cpp
+++ b/clang/test/OpenMP/cancellation_point_codegen.cpp
@@ -22,9 +22,16 @@
 #pragma omp cancel sections
   }
 }
-// CHECK: call i32 @__kmpc_single(
-// CHECK-NOT: @__kmpc_cancellationpoint
-// CHECK: call void @__kmpc_end_single(
+// CHECK: call void @__kmpc_for_static_init_4(
+// CHECK: [[RES:%.+]] = call i32 @__kmpc_cancellationpoint(%ident_t* {{[^,]+}}, i32 [[GTID]], i32 3)
+// CHECK: [[CMP:%.+]] = icmp ne i32 [[RES]], 0
+// CHECK: br i1 [[CMP]], label %[[EXIT:[^,].+]], label %[[CONTINUE:.+]]
+// CHECK: [[EXIT]]
+// CHECK: call i32 @__kmpc_cancel_barrier(%ident_t*
+// CHECK: br label
+// CHECK: [[CONTINUE]]
+// CHECK: br label
+// CHECK: call void @__kmpc_for_static_fini(
 // CHECK: call void @__kmpc_barrier(%ident_t*
 #pragma omp sections
 {
@@ -126,9 +133,16 @@
 // CHECK: ret i32 0
 
 // CHECK: define internal void @{{[^(]+}}(i32* {{[^,]+}}, i32* {{[^,]+}})
-// CHECK: call i32 @__kmpc_single(
-// CHECK-NOT: @__kmpc_cancellationpoint
-// CHECK: call void @__kmpc_end_single(
+// CHECK: call void @__kmpc_for_static_init_4(
+// CHECK: [[RES:%.+]] = call i32 @__kmpc_cancellationpoint(%ident_t* {{[^,]+}}, i32 [[GTID:%.+]], i32 3)
+// CHECK: [[CMP:%.+]] = icmp ne i32 [[RES]], 0
+// CHECK: br i1 [[CMP]], label %[[EXIT:[^,].+]], label %[[CONTINUE:.+]]
+// CHECK: [[EXIT]]
+// CHECK: call i32 @__kmpc_cancel_barrier(%ident_t*
+// CHECK: br label
+// CHECK: [[CONTINUE]]
+// CHECK: br label
+// CHECK: call void @__kmpc_for_static_fini(
 // CHECK: ret void
 
 // CHECK: define internal void @{{[^(]+}}(i32* {{[^,]+}}, i32* {{[^,]+}})