Chris Lattner f4f5a77fdc Two changes: ... 1. Implement InstCombine/deadcode.ll by not adding instructions in unreachable blocks (due to constants in conditional branches/switches) to the worklist. This causes them to be deleted before instcombine starts up, leading to better optimization. 2. In the prepass over instructions, do trivial constprop/dce as we go. This has the effect of improving the effectiveness of #1. In addition, it *significantly* speeds up instcombine on test cases with large amounts of constant folding code (for example, that produced by code specialization or partial evaluation). In one example, it speeds up instcombine from 0.0589s to 0.0224s with a release build (a 2.6x speedup). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28215 91177308-0d34-0410-b5e6-96231b3b80d8		2006-05-10 19:00:36 +00:00
..
ADCE.cpp	Make iostream #inclusion explicit	2006-01-22 23:32:06 +00:00
BasicBlockPlacement.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
CondPropagate.cpp	Fix a fixme in CondPropagate.cpp by moving a PhiNode optimization into	2005-08-04 23:24:19 +00:00
ConstantProp.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
CorrelatedExprs.cpp	Teach cee to propagate through switch statements. This implements	2006-03-19 19:37:24 +00:00
DCE.cpp	clean up and modernize this pass.	2005-05-08 18:45:26 +00:00
DeadStoreElimination.cpp	Fix a bug where we didn't realize that vaarg reads memory. This fixes	2005-11-30 19:38:22 +00:00
GCSE.cpp	Switch these to using ETForest instead of DominatorSet to compute itself.	2006-01-11 05:10:20 +00:00
IndVarSimplify.cpp	Fix a crash building 176.gcc due to my recent patch, which only fixed	2005-11-18 18:30:47 +00:00
InstructionCombining.cpp	Two changes:	2006-05-10 19:00:36 +00:00
LICM.cpp	Make iostream #inclusion explicit	2006-01-22 23:32:06 +00:00
LoopStrengthReduce.cpp	Get rid of a signed/unsigned compare warning.	2006-04-12 19:28:15 +00:00
LoopUnroll.cpp	Make iostream #inclusion explicit	2006-01-22 23:32:06 +00:00
LoopUnswitch.cpp	add the actual cost to the debug info	2006-03-24 07:14:00 +00:00
LowerGC.cpp	FunctionPass's cannot do IPO things.	2006-01-14 19:30:35 +00:00
LowerPacked.cpp	Lowerpacked and SCCP support for the insertelement operation.	2006-01-17 20:06:55 +00:00
Makefile	DONT_BUILD_RELINKED is gone and implied by BUILD_ARCHIVE now	2005-10-24 02:26:13 +00:00
Reassociate.cpp	Fix Transforms/Reassociate/2006-04-27-ReassociateVector.ll	2006-04-28 04:14:49 +00:00
Reg2Mem.cpp	since reg2mem requires it, might as well mention that it preserves it	2005-11-25 16:04:54 +00:00
ScalarReplAggregates.cpp	Fix Transforms/ScalarRepl/2006-04-20-PromoteCrash.ll	2006-04-20 20:48:50 +00:00
SCCP.cpp	Add supprot for shufflevector	2006-04-08 01:19:12 +00:00
SimplifyCFG.cpp	Remove trailing whitespace	2005-04-21 23:48:37 +00:00
TailDuplication.cpp	Make iostream #inclusion explicit	2006-01-22 23:32:06 +00:00
TailRecursionElimination.cpp	Implement Transforms/TailCallElim/return-undef.ll, a trivial case	2005-11-05 08:21:11 +00:00