Jingyue Wu 1d56cda023 Partially revert r210444 due to performance regression ... Summary: Converting outermost zext(a) to sext(a) causes worse code when the computation of zext(a) could be reused. For example, after converting ... = array[zext(a)] ... = array[zext(a) + 1] to ... = array[sext(a)] ... = array[zext(a) + 1], the program computes sext(a), which is actually unnecessary. I added one test in split-gep-and-gvn.ll to illustrate this scenario. Also, with r211281 and r211084, we annotate more "nuw" tags to computation involving CUDA intrinsics such as threadIdx.x. These annotations help with splitting GEP a lot, rendering the benefit we get from this reverted optimization only marginal. Test Plan: make check-all Reviewers: eliben, meheff Reviewed By: meheff Subscribers: jholewinski, llvm-commits Differential Revision: http://reviews.llvm.org/D4542 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213209 91177308-0d34-0410-b5e6-96231b3b80d8		2014-07-16 23:25:00 +00:00
..
ADCE.cpp
CMakeLists.txt
ConstantHoisting.cpp
ConstantProp.cpp
CorrelatedValuePropagation.cpp
DCE.cpp
DeadStoreElimination.cpp
EarlyCSE.cpp
FlattenCFGPass.cpp
GVN.cpp
IndVarSimplify.cpp
JumpThreading.cpp
LICM.cpp
LLVMBuild.txt
LoadCombine.cpp
LoopDeletion.cpp
LoopIdiomRecognize.cpp
LoopInstSimplify.cpp
LoopRerollPass.cpp
LoopRotation.cpp
LoopStrengthReduce.cpp
LoopUnrollPass.cpp
LoopUnswitch.cpp
LowerAtomic.cpp
Makefile
MemCpyOptimizer.cpp
PartiallyInlineLibCalls.cpp
Reassociate.cpp
Reg2Mem.cpp
SampleProfile.cpp
Scalar.cpp
Scalarizer.cpp
ScalarReplAggregates.cpp
SCCP.cpp
SeparateConstOffsetFromGEP.cpp	Partially revert r210444 due to performance regression	2014-07-16 23:25:00 +00:00
SimplifyCFGPass.cpp
Sink.cpp
SROA.cpp
StructurizeCFG.cpp
TailRecursionElimination.cpp