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5 Commits

Author SHA1 Message Date
Dan Gohman a9c205cc88 Make LoopSimplify change conditional branches in loop exiting blocks 
which branch on undef to branch on a boolean constant for the edge
exiting the loop. This helps ScalarEvolution compute trip counts for
loops.

Teach ScalarEvolution to recognize single-value PHIs, when safe, and
ForgetSymbolicName to forget such single-value PHI nodes as apprpriate
in ForgetSymbolicName.

llvm-svn: 97126
 2010-02-25 06:57:05 +00:00
Dan Gohman 36bca4e4ba Update this test for a trivial register allocation difference. 
llvm-svn: 94989
 2010-02-01 19:00:32 +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
Anton Korobeynikov 758f8c690d Unbreak 
llvm-svn: 81205
 2009-09-08 07:30:03 +00:00
Evan Cheng a7afdda65d When remat'ing and destination virtual register has a sub-register index. Make sure the sub-register class matches the register class of the remat'ed instruction definition register class. 
llvm-svn: 81204
 2009-09-08 06:39:07 +00:00