Duncan Sands dc51b0ee48 Turn X-(X-Y) into Y. According to my auto-simplifier this is the most common ... simplification present in fully optimized code (I think instcombine fails to transform some of these when "X-Y" has more than one use). Fires here and there all over the test-suite, for example it eliminates 8 subtractions in the final IR for 445.gobmk, 2 subs in 447.dealII, 2 in paq8p etc. llvm-svn: 123442		2011-01-14 15:26:10 +00:00
..
ADCE
ArgumentPromotion
BlockPlacement
BranchFolding
CodeExtractor
CodeGenPrepare	revert r122164, I'm going to go with a different approach.	2010-12-19 04:23:03 +00:00
ConstantMerge
ConstProp	Teach constant folding to perform conversions from constant floating	2011-01-11 01:07:24 +00:00
CorrelatedValuePropagation	Fix PR8790, another instance where unreachable code can cause instruction simplification to fail,	2010-12-15 00:55:35 +00:00
DeadArgElim
DeadStoreElimination	Fix PR8728, a miscompilation I recently introduced. When optimizing	2010-12-06 01:48:06 +00:00
EarlyCSE	Duncan deftly points out that readnone functions aren't	2011-01-03 23:38:13 +00:00
FunctionAttrs	Make ModRefBehavior a lattice. Use this to clean up AliasAnalysis	2010-11-10 01:02:18 +00:00
GlobalDCE
GlobalOpt	fix a globalopt crash on two Adobe-C++ testcases that the recent	2011-01-01 22:31:46 +00:00
GVN	Give GVN back the ability to perform simple conditional propagation on conditional branch values.	2010-12-21 23:54:34 +00:00
IndVarSimplify
Inline	relax testcase a bit.	2011-01-14 07:46:33 +00:00
InstCombine	Move some shift transforms out of instcombine and into InstructionSimplify.	2011-01-14 00:37:45 +00:00
InstSimplify	Turn X-(X-Y) into Y. According to my auto-simplifier this is the most common	2011-01-14 15:26:10 +00:00
Internalize
IPConstantProp
JumpThreading	Teach jump threading to "look through" a select when the branch direction of a terminator depends on it.	2010-12-15 09:51:20 +00:00
LCSSA
LICM	Enhance LICM to promote alias sets whose pointers themselves are stored,	2010-12-19 05:57:25 +00:00
LoopDeletion
LoopIdiom	Teach loop-idiom to turn a loop containing a memset into a larger memset	2011-01-04 07:46:33 +00:00
LoopRotate	merge tests into one crash.ll test.	2011-01-11 07:50:07 +00:00
LoopSimplify	Fix PR8702 by not having LoopSimplify claim to preserve LCSSA form. As described	2011-01-02 13:38:21 +00:00
LoopStrengthReduce
LoopUnroll
LoopUnswitch	Factor code for testing whether replacing one value with another	2010-11-18 19:59:41 +00:00
LowerAtomic
LowerInvoke
LowerSetJmp
LowerSwitch
Mem2Reg
MemCpyOpt	revert 123144, reenabling the rest of memset formation.	2011-01-12 03:25:15 +00:00
MergeFunc
PartialSpecialize
PruneEH
Reassociate
ScalarRepl	Extend SROA to handle arrays accessed as homogeneous structs and vice versa.	2011-01-13 17:45:11 +00:00
SCCP
SimplifyCFG	SimplifyCFG: Ranges can be larger than 64 bits. Fixes Release-selfhost build.	2010-12-17 10:48:14 +00:00
SimplifyLibCalls	Revert r64460. strtol and friends cannot be marked readonly, even with	2010-12-17 01:09:43 +00:00
Sink
SRETPromotion
StripSymbols
TailCallElim
TailDup