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llvm-project/llvm/lib/Transforms/Scalar
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Philip Reames e73300b925 [RewriteStatepointsForGC] Move an expensive debugging check to XDEBUG 
The check in question is attempting to help find cases where we haven't relocated a pointer at a safepoint we should have.  It does this by coercing the value to null at any safepoint which doesn't relocate it.  

Unfortunately, this turns out to be rather expensive in terms of memory usage and time.  The number of stores inserted can grow with O(number of values x number of statepoints).  On at least one example I looked at, over half of peak memory usage was coming from this check.  

With this change, the check is no longer enabled by default in Asserts builds.  It is enabled for expensive asserts builds and has a command line option to enable it in both Asserts and non-Asserts builds.  

llvm-svn: 234761
 		2015-04-13 16:41:32 +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 Reapply r233175 and r233183: float2int. 2015-03-27 10:36:57 +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 [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
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
IndVarSimplify.cpp [opaque pointer type] More GEP API migrations in IRBuilder uses 2015-04-03 19:41:44 +00:00
InductiveRangeCheckElimination.cpp [IRCE] Fix how IRCE checks for no-sign-overflow. 2015-03-24 19:29:22 +00:00
JumpThreading.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
LICM.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
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 Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used. 2015-03-23 19:32:43 +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 Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used. 2015-03-23 19:32:43 +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 Mark empty default constructors as =default if it makes the type POD 2015-04-11 18:57:14 +00:00
LoopUnrollPass.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
LoopUnswitch.cpp DataLayout is mandatory, update the API to reflect it with references. 2015-03-10 02:37:25 +00:00
LowerAtomic.cpp IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
LowerExpectIntrinsic.cpp [PM] Port LowerExpectIntrinsic to the new pass manager. 2015-01-24 11:13:02 +00:00
Makefile
…
MemCpyOptimizer.cpp [CallSite] Make construction from Value* (or Instruction*) explicit. 2015-04-10 14:50:08 +00:00
MergedLoadStoreMotion.cpp Another set of missing raw_ostream.h. Still no functional change. 2015-03-23 18:45:56 +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 [CallSite] Make construction from Value* (or Instruction*) explicit. 2015-04-10 14:50:08 +00:00
Reassociate.cpp Reapply "[Reassociate] Add initial support for vector instructions." 2015-03-13 20:53:01 +00:00
Reg2Mem.cpp Standardize {pred,succ,use,user}_empty() 2015-01-13 03:46:47 +00:00
RewriteStatepointsForGC.cpp [RewriteStatepointsForGC] Move an expensive debugging check to XDEBUG 2015-04-13 16:41:32 +00:00
SCCP.cpp [opaque pointer type] API migration for GEP constant factories 2015-04-02 18:55:32 +00:00
SROA.cpp [opaque pointer type] More GEP IRBuilder API migrations... 2015-04-03 21:33:42 +00:00
SampleProfile.cpp Transforms: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:27:00 +00:00
Scalar.cpp Reapply r233175 and r233183: float2int. 2015-03-27 10:36:57 +00:00
ScalarReplAggregates.cpp [opaque pointer type] More GEP API migrations in IRBuilder uses 2015-04-03 19:41:44 +00:00
Scalarizer.cpp [opaque pointer type] More GEP IRBuilder API migrations 2015-04-03 23:03:54 +00:00
SeparateConstOffsetFromGEP.cpp [opaque pointer type] More GEP API migrations in IRBuilder uses 2015-04-03 19:41:44 +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
StraightLineStrengthReduce.cpp [SLSR] consider &B[S << i] as &B[(1 << i) * S] 2015-04-06 17:15:48 +00:00
StructurizeCFG.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
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