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5 Commits

Author SHA1 Message Date
Chris Lattner e0e32a9ef0 now that loads are in their own table, we can implement 
store->load forwarding.  This allows EarlyCSE to zap 600 more
loads from 176.gcc.

llvm-svn: 122732
 2011-01-03 03:46:34 +00:00
Chris Lattner 0446bb23f8 add a testcase for readonly call CSE 
llvm-svn: 122730
 2011-01-03 03:33:47 +00:00
Chris Lattner b9a8efc960 Teach EarlyCSE to do trivial CSE of loads and read-only calls. 
On 176.gcc, this catches 13090 loads and calls, and increases the
number of simple instructions CSE'd from 29658 to 36208.

llvm-svn: 122727
 2011-01-03 03:18:43 +00:00
Chris Lattner 8fac5db251 add DEBUG and -stats output to earlycse. 
Teach it to CSE the rest of the non-side-effecting instructions.

llvm-svn: 122716
 2011-01-02 23:19:45 +00:00
Chris Lattner 18ae5436b1 Enhance earlycse to do CSE of casts, instsimplify and die. 
Add a testcase.

llvm-svn: 122715
 2011-01-02 23:04:14 +00:00