Philip Reames cce3c83917 Refine memory dependence's notion of volatile semantics ... According to my reading of the LangRef, volatiles are only ordered with respect to other volatiles. It is entirely legal and profitable to forward unrelated loads over the volatile load. This patch implements this for GVN by refining the transition rules MemoryDependenceAnalysis uses when encountering a volatile. The added test cases show where the extra flexibility is profitable for local dependence optimizations. I have a related change (227110) which will extend this to non-local dependence (i.e. PRE), but that's essentially orthogonal to the semantic change in this patch. I have tested the two together and can confirm that PRE works over a volatile load with both changes. I will be submitting a PRE w/volatiles test case seperately in the near future. Differential Revision: http://reviews.llvm.org/D6901 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227112 91177308-0d34-0410-b5e6-96231b3b80d8		2015-01-26 18:54:27 +00:00
..
ADCE
AddDiscriminators	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
AlignmentFromAssumptions	[AlignmentFromAssumptions] Don't crash just because the target is 32-bit	2014-09-11 08:40:17 +00:00
ArgumentPromotion	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
AtomicExpand/ARM	Use target-dependent emitLeading/TrailingFence instead of the target-independent insertLeading/TrailingFence (in AtomicExpandPass)	2014-09-03 21:01:03 +00:00
BBVectorize	This patch teaches IndVarSimplify to add nuw and nsw to certain kinds	2015-01-06 19:02:56 +00:00
BranchFolding	Delete -std-compile-opts.	2014-10-16 20:00:02 +00:00
CodeExtractor
CodeGenPrepare	[GC] CodeGenPrep transform: simplify offsetable relocate	2015-01-14 23:27:07 +00:00
ConstantHoisting
ConstantMerge
ConstProp	Fix a bug around truncating vector in const prop.	2014-08-21 02:12:35 +00:00
CorrelatedValuePropagation	LazyValueInfo: Actually re-visit partially solved block-values in solveBlockValue()	2014-11-25 17:23:05 +00:00
DeadArgElim	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
DeadStoreElimination	IR: Make metadata typeless in assembly	2014-12-15 19:07:53 +00:00
EarlyCSE	Tweak EarlyCSE to recognize series of dead stores	2014-11-18 17:46:32 +00:00
FunctionAttrs	Normally an 'optnone' function goes through fast-isel, which does not	2014-11-03 18:19:26 +00:00
GCOVProfiling	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
GlobalDCE	Change the .ll syntax for comdats and add a syntactic sugar.	2015-01-06 22:55:16 +00:00
GlobalOpt	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
GVN	Refine memory dependence's notion of volatile semantics	2015-01-26 18:54:27 +00:00
IndVarSimplify	Fix PR22222	2015-01-15 01:46:09 +00:00
Inline	DebugInfo: Use distinct inlinedAt MDLocations to avoid separate inlined calls being coalesced	2015-01-21 22:57:29 +00:00
InstCombine	[PM] Port instcombine to the new pass manager!	2015-01-24 04:19:17 +00:00
InstMerge	Added 5 more tests related to sink store revision 224247	2014-12-17 08:12:59 +00:00
InstSimplify	InstSimplify: Optimize away pointless comparisons	2014-12-20 03:04:38 +00:00
Internalize
IPConstantProp
IRCE	Fix crashes in IRCE caused by mismatched types	2015-01-22 08:29:18 +00:00
JumpThreading	ValueTracking: ComputeNumSignBits should tolerate misshapen phi nodes	2015-01-04 07:06:53 +00:00
LCSSA	[LCSSA] Handle PHI insertion in disjoint loops	2014-12-22 22:35:46 +00:00
LICM	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
LoadCombine	Use AA in LoadCombine	2014-11-03 23:19:16 +00:00
LoopDeletion
LoopIdiom	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
LoopReroll
LoopRotate	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
LoopSimplify	FileCheckize. NFC.	2014-09-12 17:55:16 +00:00
LoopStrengthReduce	IR: Make metadata typeless in assembly	2014-12-15 19:07:53 +00:00
LoopUnroll	Use a smaller pragma unroll threshold to reduce test execution time.	2015-01-21 13:52:02 +00:00
LoopUnswitch
LoopVectorize	Fixed a bug in masked load/store in reversed loop.	2015-01-22 08:20:06 +00:00
LowerAtomic
LowerExpectIntrinsic	[PM] Port LowerExpectIntrinsic to the new pass manager.	2015-01-24 11:13:02 +00:00
LowerInvoke
LowerSwitch	LowerSwitch: replace unreachable default with popular case destination	2015-01-23 20:43:51 +00:00
Mem2Reg	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
MemCpyOpt	Allow call-slop optzn for destinations with a suitable dereferenceable attribute	2014-10-16 19:43:08 +00:00
MergeFunc	IR: Make metadata typeless in assembly	2014-12-15 19:07:53 +00:00
MetaRenamer
ObjCARC	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
PartiallyInlineLibCalls
PhaseOrdering
PruneEH
Reassociate	Fix Reassociate handling of constant in presence of undef float	2015-01-16 03:00:58 +00:00
Reg2Mem
SampleProfile	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
Scalarizer	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
ScalarRepl	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
SCCP	SCCP: overdefined calls cannot become constant	2014-11-07 08:54:19 +00:00
SeparateConstOffsetFromGEP/NVPTX	[SeparateConstOffsetFromGEP] Fixed a bug related to unsigned modulo	2014-10-25 18:34:03 +00:00
SimplifyCFG	Revert "Don't remove a landing pad if the invoke requires a table entry."	2015-01-22 19:29:46 +00:00
Sink
SLPVectorizer	SLPVectorizer: fix wrong scheduling of atomic load/stores.	2015-01-26 09:07:04 +00:00
SROA	[SROA] Apply a somewhat heavy and unpleasant hammer to fix PR22093, an	2015-01-05 04:17:53 +00:00
StripSymbols	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
StructurizeCFG	StructurizeCFG: Use LoopInfo analysis for better loop detection	2014-12-03 04:28:32 +00:00
TailCallElim	Fix tail recursion elimination	2014-11-19 13:32:51 +00:00
TailDup
Util	[SwitchLowering] Handle destinations on multiple phi instructions	2014-12-02 18:31:53 +00:00