Chris Lattner 5324d80283 two changes: ... 1) don't try to optimize a sext or zext that is only used by a trunc, let the trunc get optimized first. This avoids some pointless effort in some common cases since instcombine scans down a block in the first pass. 2) Change the cost model for zext elimination to consider an 'and' cheaper than a zext. This allows us to do it more aggressively, and for the next patch to simplify the code quite a bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93097 91177308-0d34-0410-b5e6-96231b3b80d8		2010-01-10 02:39:31 +00:00
..
Hello	Fix a bunch of little errors that Clang complains about when its being pedantic	2009-12-19 07:05:23 +00:00
InstCombine	two changes:	2010-01-10 02:39:31 +00:00
Instrumentation	Move remaining stuff to the isInteger predicate.	2010-01-05 21:05:54 +00:00
IPO	Be less stingy as to how many selects and phi nodes we	2010-01-07 05:48:42 +00:00
Scalar	only factor from expressions whose uses are empty and whose	2010-01-09 06:01:36 +00:00
Utils	Fix nondeterministic behavior.	2010-01-10 01:07:22 +00:00
Makefile	move instcombine to its own library, it's past time.	2010-01-04 06:23:24 +00:00