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4 Commits

Author SHA1 Message Date
Evan Cheng 0be4144a68 Allow machine-cse to look across MBB boundary when cse'ing instructions that 
define physical registers. It's currently very restrictive, only catching
cases where the CE is in an immediate (and only) predecessor. But it catches
a surprising large number of cases.

rdar://10660865

llvm-svn: 147827
 2012-01-10 02:02:58 +00:00
Evan Cheng a03e6f85fe Re-apply 105308 with fix. 
llvm-svn: 105502
 2010-06-04 23:28:13 +00:00
Bob Wilson 30093b5d8b Revert 105308. 
llvm-svn: 105399
 2010-06-03 18:28:31 +00:00
Evan Cheng a2da22734f Enable machine cse of instructions which define physical registers. 
llvm-svn: 105308
 2010-06-02 01:08:27 +00:00