[NFC][Clang] Adopt simplified `getTrailingObjects` in Expr.cpp/h (#140102)

Adopt non-templated and array-ref returning forms of
`getTrailingObjects` in Expr.cpp/.h.

Use ArrayRef forms to eliminate manual asserting for OOB index. Use
llvm::copy() instead of std::copy() in some instances.

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp b/clang/lib/Serialization/ASTReaderStmt.cpp
index bf352c3..0ba0378 100644
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -1433,12 +1433,12 @@ void ASTStmtReader::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
   E->PseudoObjectExprBits.ResultIndex = Record.readInt();
 
   // Read the syntactic expression.
-  E->getSubExprsBuffer()[0] = Record.readSubExpr();
+  E->getTrailingObjects()[0] = Record.readSubExpr();
 
   // Read all the semantic expressions.
   for (unsigned i = 0; i != numSemanticExprs; ++i) {
     Expr *subExpr = Record.readSubExpr();
-    E->getSubExprsBuffer()[i+1] = subExpr;
+    E->getTrailingObjects()[i + 1] = subExpr;
   }
 }