[LLVMbugs] [Bug 4961] ARM GCC __sync_synchronize does not generate code

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=4961

Jim Grosbach <grosbach at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |grosbach at apple.com
         Resolution|                            |FIXED

--- Comment #2 from Jim Grosbach <grosbach at apple.com> 2010-04-22 11:27:08 CDT ---
__sync_synchronize() currently generates a 'dmb' instruction for ARMv7 and 'mov
   r0, #0 ; mcr p15, 0, r0, c7, c10, 5' for ARMv6.

In the future, we may want to adjust the details depending on environmental
specifics (single vs. multi core, differing OS requirements, etc). It's
probably worth opening separate PR's for the details of those as they become
clear.

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