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6865b977ae
llvm-6502/lib/Transforms/Scalar
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Philip Reames 6865b977ae [RewriteStatepointsForGC] Extend base pointer to handle more cases w/vectors 
When relocating a pointer, we need to determine a base pointer for the derived pointer being relocated. We have limited support for handling a pointer extracted from a vector; the current code only handled the case where the entire vector was known to contain base pointers. This patch extends the reasoning to handle chains of insertelements where the indices are constants. This case turns out to be fairly common in vectorized code. We can now handle vectors which contains mixtures of base and derived pointers provided the insertelements use constant indices.

Note that this doesn't solve the general problem. To handle variable indexed insertelements, we'd need to scalarize and introduce conditional branching based on the index. Alternatively, we could eagerly scalarize, but the code structure doesn't currently make either fix easy. The patch also doesn't handle shufflevector or other vector manipulation for much the same reasons. I plan to defer this work until I have a motivating test case.

Differential Revision: http://reviews.llvm.org/D9676



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237200 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-12 22:19:52 +00:00
..
ADCE.cpp [ADCE] Don't indent inside an anonymous namespace 2015-02-16 18:08:00 +00:00
AlignmentFromAssumptions.cpp Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
BDCE.cpp DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
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 DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
CorrelatedValuePropagation.cpp DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
DCE.cpp [PM] Separate the TargetLibraryInfo object from the immutable pass. 2015-01-15 10:41:28 +00:00
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 Update libdeps since TLI was moved from Target to Analysis in r226078. 2015-01-15 05:21:00 +00:00
LoadCombine.cpp Mark empty default constructors as =default if it makes the type POD 2015-04-11 18:57:14 +00:00
LoopDeletion.cpp [PM] Split the LoopInfo object apart from the legacy pass, creating 2015-01-17 14:16:18 +00:00
LoopIdiomRecognize.cpp [LoopIdiomRecognize] Transform backedge-taken count check into an assertion. 2015-05-11 21:02:34 +00:00
LoopInstSimplify.cpp DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
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 Reimplement heuristic for estimating complete-unroll optimization effects. 2015-05-12 17:20:03 +00:00
LoopUnswitch.cpp DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
LowerAtomic.cpp
LowerExpectIntrinsic.cpp [PM] Port LowerExpectIntrinsic to the new pass manager. 2015-01-24 11:13:02 +00:00
Makefile
MemCpyOptimizer.cpp [MemCpyOpt] Look at any dependency -not just source- for memset+memcpy. 2015-05-11 23:09:46 +00:00
MergedLoadStoreMotion.cpp Another set of missing raw_ostream.h. Still no functional change. 2015-03-23 18:45:56 +00:00
NaryReassociate.cpp Resurrect r235688 2015-04-24 04:22:39 +00:00
PartiallyInlineLibCalls.cpp [multiversion] Thread a function argument through all the callers of the 2015-02-01 12:01:35 +00:00
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 Standardize {pred,succ,use,user}_empty() 2015-01-13 03:46:47 +00:00
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 DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
Sink.cpp DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
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