David Chisnall db365f38ea Call out to GCC-compatible runtime functions for atomic ops that we can't use ...

LLVM intrinsics for.

I have an implementation of these functions, which wants to go in a libgcc_s
equivalent in compiler-rt.  It's currently here:

http://people.freebsd.org/~theraven/atomic.c

It will be committed to compiler-rt as soon as I work out where would be a
sensible place to put it...

llvm-svn: 153666

2012-03-29 18:01:11 +00:00

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