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Artifact 24797ebe0ab5f0f88ae02615a0215498070ce48a:

//===-- sync_synchronize - Implement memory barrier * ----------------------===//
//                     The LLVM Compiler Infrastructure
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.

#include "../assembly.h"

// When compiling a use of the gcc built-in __sync_synchronize() in thumb1 mode
// the compiler may emit a call to __sync_synchronize.  
// On Darwin the implementation jumps to an OS supplied function named 
// OSMemoryBarrier

	.syntax unified

#if __APPLE__

	.p2align 2
	stmfd	sp!, {r7, lr}
	add		r7, sp, #0
	bl		_OSMemoryBarrier
	ldmfd	sp!, {r7, pc}

	// tell linker it can break up file at label boundaries