[NFC] Generalize ArraySections to work for OpenACC in the future (#89639)

OpenACC is going to need an array sections implementation that is a
simpler version/more restrictive version of the OpenMP version. 

This patch moves `OMPArraySectionExpr` to `Expr.h` and renames it `ArraySectionExpr`,
 then adds an enum to choose between the two.

This also fixes a couple of 'drive-by' issues that I discovered on the way,
but leaves the OpenACC Sema parts reasonably unimplemented (no semantic
analysis implementation), as that will be a followup patch.

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaInit.cpp b/clang/lib/Sema/SemaInit.cpp
index 793e16d..003a157 100644
--- a/clang/lib/Sema/SemaInit.cpp
+++ b/clang/lib/Sema/SemaInit.cpp
@@ -7753,9 +7753,9 @@ static void visitLocalsRetainedByReferenceBinding(IndirectLocalPath &Path,
     break;
   }
 
-  case Stmt::OMPArraySectionExprClass: {
+  case Stmt::ArraySectionExprClass: {
     visitLocalsRetainedByInitializer(Path,
-                                     cast<OMPArraySectionExpr>(Init)->getBase(),
+                                     cast<ArraySectionExpr>(Init)->getBase(),
                                      Visit, true, EnableLifetimeWarnings);
     break;
   }