Chandler Carruth 36ae8103b1 [Unrolling] Refactor the start and step offsets to simplify overflow ... checking and make the cache faster and smaller. I had thought that using an APInt here would be useful, but I think I was just wrong. Notably, we don't have to do any fancy overflow checking, we can just bound the values as quite small and do the math in a higher precision integer. I've switched to a signed integer so that UBSan will even point out if we ever have integer overflow. I've added various asserts to try to catch things as well and hoisted the overflow checks so that we just leave the too-large offsets out of the SCEV-GEP cache. This makes the value in the cache quite a bit smaller which is probably worthwhile. No functionality changed here (for trip counts under 1 billion). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237209 91177308-0d34-0410-b5e6-96231b3b80d8		2015-05-12 23:32:56 +00:00
..
ADCE.cpp
AlignmentFromAssumptions.cpp	Use 'override/final' instead of 'virtual' for overridden methods	2015-04-11 02:11:45 +00:00
BDCE.cpp
CMakeLists.txt	Simplify n-ary adds by reassociation	2015-04-14 04:59:22 +00:00
ConstantHoisting.cpp	Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used.	2015-03-23 19:32:43 +00:00
ConstantProp.cpp
CorrelatedValuePropagation.cpp	CVP: Improve handling of Selects used as incoming PHI values	2015-05-12 22:31:47 +00:00
DCE.cpp
DeadStoreElimination.cpp	[CallSite] Make construction from Value* (or Instruction*) explicit.	2015-04-10 14:50:08 +00:00
EarlyCSE.cpp	Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used.	2015-03-23 19:32:43 +00:00
FlattenCFGPass.cpp
Float2Int.cpp	Reapply r233175 and r233183: float2int.	2015-03-27 10:36:57 +00:00
GVN.cpp	[opaque pointer type] API migration for GEP constant factories	2015-04-02 18:55:32 +00:00
InductiveRangeCheckElimination.cpp	[IRCE] Fix how IRCE checks for no-sign-overflow.	2015-03-24 19:29:22 +00:00
IndVarSimplify.cpp	[SCEV] Refactor out isHighCostExpansion. NFCI.	2015-04-14 03:20:28 +00:00
JumpThreading.cpp	[JumpThreading] Simplify comparisons when simplifying branches	2015-05-07 00:19:14 +00:00
LICM.cpp	Convert PHI getIncomingValue() to foreach over incoming_values(). NFC.	2015-05-12 20:05:31 +00:00
LLVMBuild.txt
LoadCombine.cpp	Mark empty default constructors as =default if it makes the type POD	2015-04-11 18:57:14 +00:00
LoopDeletion.cpp
LoopIdiomRecognize.cpp	[LoopIdiomRecognize] Transform backedge-taken count check into an assertion.	2015-05-11 21:02:34 +00:00
LoopInstSimplify.cpp
LoopInterchange.cpp	Fix LoopInterchange/reductions.ll test for debug builds	2015-04-24 17:39:16 +00:00
LoopRerollPass.cpp	Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used.	2015-03-23 19:32:43 +00:00
LoopRotation.cpp	Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used.	2015-03-23 19:32:43 +00:00
LoopStrengthReduce.cpp	[LSR][NFC] Remove a stale comment.	2015-04-21 20:42:50 +00:00
LoopUnrollPass.cpp	[Unrolling] Refactor the start and step offsets to simplify overflow	2015-05-12 23:32:56 +00:00
LoopUnswitch.cpp
LowerAtomic.cpp
LowerExpectIntrinsic.cpp
Makefile
MemCpyOptimizer.cpp	[MemCpyOpt] Look at any dependency -not just source- for memset+memcpy.	2015-05-11 23:09:46 +00:00
MergedLoadStoreMotion.cpp
NaryReassociate.cpp	Resurrect r235688	2015-04-24 04:22:39 +00:00
PartiallyInlineLibCalls.cpp
PlaceSafepoints.cpp	[PlaceSafepoints] Add missing "override" to PlaceBackedgeSafepointsImpl::runOnFunction	2015-05-12 21:49:47 +00:00
Reassociate.cpp	don't repeat function names in comments; NFC	2015-04-22 18:04:46 +00:00
Reg2Mem.cpp
RewriteStatepointsForGC.cpp	[RewriteStatepointsForGC] Extend base pointer to handle more cases w/vectors	2015-05-12 22:19:52 +00:00
SampleProfile.cpp	IR: Give 'DI' prefix to debug info metadata	2015-04-29 16:38:44 +00:00
Scalar.cpp	Simplify n-ary adds by reassociation	2015-04-14 04:59:22 +00:00
Scalarizer.cpp	[opaque pointer type] More GEP IRBuilder API migrations	2015-04-03 23:03:54 +00:00
ScalarReplAggregates.cpp	IR: Give 'DI' prefix to debug info metadata	2015-04-29 16:38:44 +00:00
SCCP.cpp	[opaque pointer type] API migration for GEP constant factories	2015-04-02 18:55:32 +00:00
SeparateConstOffsetFromGEP.cpp	Fix comment for NoCommonBits.	2015-04-23 22:55:48 +00:00
SimplifyCFGPass.cpp
Sink.cpp
SROA.cpp	IR: Give 'DI' prefix to debug info metadata	2015-04-29 16:38:44 +00:00
StraightLineStrengthReduce.cpp	[SLSR] garbage-collect unused instructions	2015-04-21 19:56:18 +00:00
StructurizeCFG.cpp	Change range-based for-loops to be -Wrange-loop-analysis clean.	2015-04-15 01:21:15 +00:00
TailRecursionElimination.cpp	Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used.	2015-03-23 19:32:43 +00:00