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3 Commits

Author SHA1 Message Date
Evan Cheng
536e66764b On x86, if the only use of a i64 load is a i64 store, generate a pair of double load and store instead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66776 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-12 05:59:15 +00:00
Chris Lattner
d2b1fb27df copy mmx values from/to memory with GPRs on x86-32 
instead of with mmx registers.  This horribleness is apparently
done by gcc to avoid having to insert emms in places that really 
should have it.  This is the second half of rdar://5741668.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47474 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-22 05:18:04 +00:00
Chris Lattner
149a4e56fc Start using GPR's to copy around mmx value instead of mmx regs. 
GCC apparently does this, and code depends on not having to do
emms when this happens.  This is x86-64 only so far, second half
should handle x86-32.

rdar://5741668


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47470 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-22 02:09:43 +00:00