From b115be707de3c91f8d49bd978f6a6da7ba0b7231 Mon Sep 17 00:00:00 2001
From: Steve Naroff <snaroff@apple.com>
Date: Tue, 3 Jun 2008 22:06:04 +0000
Subject: [PATCH] Put back my temporary hack until Eli addresses this in a more
 complete fashion.

llvm-svn: 51920
---
 clang/lib/AST/Expr.cpp              |  5 +++++
 clang/test/Sema/darwin-align-cast.c | 23 +++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 clang/test/Sema/darwin-align-cast.c

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 357d711978b3..a89fbd621a56 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -918,6 +918,11 @@ bool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx,
     if (!SubExpr->getType()->isArithmeticType() ||
         !getType()->isIntegerType()) {
       if (Loc) *Loc = SubExpr->getLocStart();
+      // GCC accepts pointers as an extension.
+      // FIXME: check getLangOptions().NoExtensions. At the moment, it doesn't
+      // appear possible to get langOptions() from the Expr.
+      if (SubExpr->getType()->isPointerType()) // && !NoExtensions
+        return true;
       return false;
     }
 
diff --git a/clang/test/Sema/darwin-align-cast.c b/clang/test/Sema/darwin-align-cast.c
new file mode 100644
index 000000000000..adf938f29bc1
--- /dev/null
+++ b/clang/test/Sema/darwin-align-cast.c
@@ -0,0 +1,23 @@
+// RUN: clang -fsyntax-only -verify %s
+typedef long unsigned int __darwin_size_t;
+typedef long __darwin_ssize_t;
+typedef __darwin_size_t size_t;
+typedef __darwin_ssize_t ssize_t;
+
+struct cmsghdr {};
+
+#if 0
+This code below comes from the following system headers:
+sys/socket.h:#define	CMSG_SPACE(l)		(__DARWIN_ALIGN(sizeof(struct  
+cmsghdr)) + __DARWIN_ALIGN(l))
+
+i386/_param.h:#define	__DARWIN_ALIGN(p)	((__darwin_size_t)((char *)(p)  
++ __DARWIN_ALIGNBYTES) &~ __DARWIN_ALIGNBYTES)
+#endif
+
+ssize_t sendFileDescriptor(int fd, void *data, size_t nbytes, int sendfd) {
+  union {
+    char control[(((__darwin_size_t)((char *)(sizeof(struct cmsghdr)) + (sizeof(__darwin_size_t) - 1)) &~ (sizeof(__darwin_size_t) - 1)) + ((__darwin_size_t)((char *)(sizeof(int)) + (sizeof(__darwin_size_t) - 1)) &~ (sizeof(__darwin_size_t) - 1)))];
+  } control_un;
+}
+
-- 
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