Chris Lattner 6e7ba45460 This is a bulk commit that implements the following primary improvements: ... * We can now fold cast instructions into select instructions that have at least one constant operand. * We now optimize expressions more aggressively based on bits that are known to be zero. These optimizations occur a lot in code that uses bitfields even in simple ways. * We now turn more cast-cast sequences into AND instructions. Before we would only do this if it if all types were unsigned. Now only the middle type needs to be unsigned (guaranteeing a zero extend). * We transform sign extensions into zero extensions in several cases. This corresponds to these test/Regression/Transforms/InstCombine testcases: 2004-11-22-Missed-and-fold.ll and.ll: test28-29 cast.ll: test21-24 and-or-and.ll cast-cast-to-and.ll zeroext-and-reduce.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19220 91177308-0d34-0410-b5e6-96231b3b80d8		2005-01-01 16:22:27 +00:00
..
Hello	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
Instrumentation	Fix link error in PPC optimized build of 'opt'.	2004-12-13 21:28:39 +00:00
IPO	Properly implement copying of a global, fixing the 255.vortex & povray	2004-12-12 19:34:41 +00:00
Scalar	This is a bulk commit that implements the following primary improvements:	2005-01-01 16:22:27 +00:00
Utils	Implement SimplifyCFG/DeadSetCC.ll	2005-01-01 16:02:12 +00:00
ExprTypeConvert.cpp	Add includes and use std:: for standard library calls to make code	2004-09-28 14:42:44 +00:00
LevelRaise.cpp	Prototype more accurately	2004-09-20 04:43:57 +00:00
Makefile	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
TransformInternals.cpp	Merge i*.h headers into Instructions.h as part of bug403.	2004-07-29 12:17:34 +00:00
TransformInternals.h	Convert 'struct' to 'class' in various places to adhere to the coding standards	2004-10-27 16:14:51 +00:00