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4 Commits

Author SHA1 Message Date
Dale Johannesen dd224d2333 Massive rewrite of MMX: 
The x86_mmx type is used for MMX intrinsics, parameters and
return values where these use MMX registers, and is also
supported in load, store, and bitcast.

Only the above operations generate MMX instructions, and optimizations
do not operate on or produce MMX intrinsics. 

MMX-sized vectors <2 x i32> etc. are lowered to XMM or split into
smaller pieces.  Optimizations may occur on these forms and the
result casted back to x86_mmx, provided the result feeds into a
previous existing x86_mmx operation.

The point of all this is prevent optimizations from introducing
MMX operations, which is unsafe due to the EMMS problem.

llvm-svn: 115243
 2010-09-30 23:57:10 +00:00
Dan Gohman 40503396da Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81290
 2009-09-08 23:54:48 +00:00
Evan Cheng 402572a149 Update tests. 
llvm-svn: 50293
 2008-04-25 20:13:47 +00:00
Evan Cheng ccde6dd016 Special handling for MMX values being passed in either GPR64 or lower 64-bits of XMM registers. 
llvm-svn: 50289
 2008-04-25 19:11:04 +00:00