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4 Commits

Author SHA1 Message Date
Evan Cheng 050df1b8de Enable i16 to i32 promotion by default. 
llvm-svn: 102493
 2010-04-28 08:30:49 +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
Dan Gohman 6c23fa2442 Don't use INSERT_SUBREG to model anyext operations on x86-64, as it 
leads to partial-register definitions. To help avoid redundant
zero-extensions, also teach the h-register matching patterns that
use movzbl to match anyext as well as zext.

llvm-svn: 80099
 2009-08-26 14:59:13 +00:00
Evan Cheng c8eeb752a3 - More aggressively coalescing away copies whose source is defined by an implicit_def. 
- Added insert_subreg coalescing support.

llvm-svn: 49448
 2008-04-09 20:57:25 +00:00