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3 Commits

Author SHA1 Message Date
Quentin Colombet
337e6e6d1f During SelectionDAG building explicitly set a node to constant zero when the 
value is zero.
This allows optmizations to kick in more easily.
Fix some test cases so that they remain meaningful (i.e., not completely dead
coded) when optimizations apply.

<rdar://problem/14096009> superfluous multiply by high part of zero-extended
value.

llvm-svn: 184222
 2013-06-18 20:14:39 +00:00
Dan Gohman
df2896d609 Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81290
 2009-09-08 23:54:48 +00:00
Chris Lattner
e85be004b9 new testcase, by Dan Gohman 
llvm-svn: 34255
 2007-02-13 23:41:24 +00:00