[llvm] r284626 - Add a macro for prefetching data.

[Rafael Espindola via llvm-commits]

Author: rafael
Date: Wed Oct 19 13:34:32 2016
New Revision: 284626

URL: http://llvm.org/viewvc/llvm-project?rev=284626&view=rev
Log:
Add a macro for prefetching data.

It will be used in lld.

Modified:
    llvm/trunk/include/llvm/Support/Compiler.h

Modified: llvm/trunk/include/llvm/Support/Compiler.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/Compiler.h?rev=284626&r1=284625&r2=284626&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/Compiler.h (original)
+++ llvm/trunk/include/llvm/Support/Compiler.h Wed Oct 19 13:34:32 2016
@@ -118,6 +118,12 @@
 #define LLVM_LIBRARY_VISIBILITY
 #endif
 
+#if defined(__GNUC__)
+#define LLVM_PREFETCH(addr, rw, locality) __builtin_prefetch(addr, rw, locality)
+#else
+#define LLVM_PREFETCH(addr, rw, locality)
+#endif
+
 #if __has_attribute(sentinel) || LLVM_GNUC_PREREQ(3, 0, 0)
 #define LLVM_END_WITH_NULL __attribute__((sentinel))
 #else