From 0a223d981e6d57a051c77a65cdee9f7024e1bc35 Mon Sep 17 00:00:00 2001
From: Erik Pilkington <erik.pilkington@gmail.com>
Date: Mon, 12 Aug 2019 18:31:27 +0000
Subject: [Sema] Require a complete type for __builtin_bit_cast operands

Fixes llvm.org/PR42936

llvm-svn: 368600
---
 clang/lib/Sema/SemaCast.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'clang/lib/Sema')

diff --git a/clang/lib/Sema/SemaCast.cpp b/clang/lib/Sema/SemaCast.cpp
index f184eda2f27..7a1d52ad4ea 100644
--- a/clang/lib/Sema/SemaCast.cpp
+++ b/clang/lib/Sema/SemaCast.cpp
@@ -2803,6 +2803,14 @@ void CastOperation::CheckBuiltinBitCast() {
     SrcExpr = Self.CreateMaterializeTemporaryExpr(SrcType, SrcExpr.get(),
                                                   /*IsLValueReference=*/false);
 
+  if (Self.RequireCompleteType(OpRange.getBegin(), DestType,
+                               diag::err_typecheck_cast_to_incomplete) ||
+      Self.RequireCompleteType(OpRange.getBegin(), SrcType,
+                               diag::err_incomplete_type)) {
+    SrcExpr = ExprError();
+    return;
+  }
+
   CharUnits DestSize = Self.Context.getTypeSizeInChars(DestType);
   CharUnits SourceSize = Self.Context.getTypeSizeInChars(SrcType);
   if (DestSize != SourceSize) {
-- 
cgit v1.2.3