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Author SHA1 Message Date
Tim Northover 277066ab43 X86: expand atomics in IR instead of as MachineInstrs. 
The logic for expanding atomics that aren't natively supported in
terms of cmpxchg loops is much simpler to express at the IR level. It
also allows the normal optimisations and CodeGen improvements to help
out with atomics, instead of using a limited set of possible
instructions..

rdar://problem/13496295

llvm-svn: 212119
 2014-07-01 18:53:31 +00:00
NAKAMURA Takumi be9ad01d27 llvm/test/CodeGen/X86/pr5145.ll: Tweak expressions to match for darwin target. 
.LBB0_1: # Linux
LBB0_1:  # Darwin

llvm-svn: 164362
 2012-09-21 05:19:19 +00:00
Michael Liao a880186030 Add missing i8 max/min/umax/umin support 
- Fix PR5145 and turn on test 8-bit atomic ops

llvm-svn: 164358
 2012-09-21 03:18:52 +00:00