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Author SHA1 Message Date
Rafael Espindola 2fb8401b2a Print "lock \t foo" instead of "lock \n foo". 
This gets gas and llc -filetype=obj to agree on the order of prefixes.

For llvm-mc we need to fix the asm parser to know that it makes a difference
on which line the "lock" is in.

Part of pr23594.

llvm-svn: 238232
 2015-05-26 18:35:10 +00:00
Tim Northover e94a518a22 IR: add a second ordering operand to cmpxhg for failure 
The syntax for "cmpxchg" should now look something like:

	cmpxchg i32* %addr, i32 42, i32 3 acquire monotonic

where the second ordering argument gives the required semantics in the case
that no exchange takes place. It should be no stronger than the first ordering
constraint and cannot be either "release" or "acq_rel" (since no store will
have taken place).

rdar://problem/15996804

llvm-svn: 203559
 2014-03-11 10:48:52 +00:00
Benjamin Kramer aca1885695 FileCheck hygiene. 
llvm-svn: 147580
 2012-01-05 00:43:34 +00:00
Eli Friedman 5e5704277f Add support for generating CMPXCHG16B on x86-64 for the cmpxchg IR instruction. 
llvm-svn: 138660
 2011-08-26 21:21:21 +00:00