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//===-- 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
//
.text
.syntax unified
#if __APPLE__
.p2align 2
DEFINE_COMPILERRT_PRIVATE_FUNCTION(__sync_synchronize)
stmfd sp!, {r7, lr}
add r7, sp, #0
bl _OSMemoryBarrier
ldmfd sp!, {r7, pc}
END_COMPILERRT_FUNCTION(__sync_synchronize)
// tell linker it can break up file at label boundaries
.subsections_via_symbols
#endif
NO_EXEC_STACK_DIRECTIVE
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