From 74169b293f2fc8767db3c659fde6b001b7d5075f Mon Sep 17 00:00:00 2001
From: David Blaikie <dblaikie@gmail.com>
Date: Tue, 21 Aug 2012 18:54:21 +0000
Subject: [PATCH] Provide a portability macro for __builtin_trap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162300 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/Compiler.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h
index 4469ae31de0..ea0a4da27f1 100644
--- a/include/llvm/Support/Compiler.h
+++ b/include/llvm/Support/Compiler.h
@@ -187,4 +187,13 @@
 # define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable()
 #endif
 
+// LLVM_BUILTIN_TRAP - On compilers which support it, expands to an expression
+// which causes the program to exit abnormally.
+#if defined(__clang__) || (__GNUC__ > 4) \
+ || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+# define LLVM_BUILTIN_TRAP __builtin_trap()
+#else
+# define LLVM_BUILTIN_TRAP *(volatile int*)0x11 = 0
+#endif
+
 #endif