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5 Commits

Author SHA1 Message Date
Richard Sandiford 47660c148c [SystemZ] Use "STC;MVC" for memset 
Use "STC;MVC" for memsets that are too big for two STCs or MV...Is yet
small enough for a single MVC.  As with memcpy, I'm leaving longer cases
till later.

The number of tests might seem excessive, but f33 & f34 from memset-04.ll
failed the first cut because I'd not added the "?:" on the calculation
of Size1.

llvm-svn: 185918
 2013-07-09 09:32:42 +00:00
Richard Sandiford d131ff8cf8 [SystemZ] Use MVC for memcpy 
Use MVC for memcpy in cases where a single MVC is enough.  Using MVC is
a win for longer copies too, but I'll leave that for later.

llvm-svn: 185802
 2013-07-08 09:35:23 +00:00
Dan Gohman dfc96aea90 Remove the SystemZ backend. 
llvm-svn: 142878
 2011-10-24 23:48:32 +00:00
Dan Gohman bb919dfb6b Implement a bunch more TargetSelectionDAGInfo infrastructure. 
Move EmitTargetCodeForMemcpy, EmitTargetCodeForMemset, and
EmitTargetCodeForMemmove out of TargetLowering and into
SelectionDAGInfo to exercise this.

llvm-svn: 103481
 2010-05-11 17:31:57 +00:00
Dan Gohman 9becdddc49 Add skeleton target-specific SelectionDAGInfo files. 
llvm-svn: 101564
 2010-04-16 23:04:22 +00:00