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Jingyue Wu 1241b83d61 [NVPTX] enable SpeculativeExecution in NVPTX 
Summary:
SpeculativeExecution enables a series straight line optimizations (such
as SLSR and NaryReassociate) on conditional code. For example,

  if (...)
    ... b * s ...
  if (...)
    ... (b + 1) * s ...

speculative execution can hoist b * s and (b + 1) * s from then-blocks,
so that we have

  ... b * s ...
  if (...)
    ...
  ... (b + 1) * s ...
  if (...)
    ...

Then, SLSR can rewrite (b + 1) * s to (b * s + s) because after
speculative execution b * s dominates (b + 1) * s.

The performance impact of this change is significant. It speeds up the
benchmarks running EigenFloatContractionKernelInternal16x16
(ba68f42fa6/unsupported/Eigen/CXX11/src/Tensor/TensorContractionCuda.h (cl-526))
by roughly 2%. Some internal benchmarks that have the above code pattern
are improved by up to 40%. No significant slowdowns are observed on
Eigen CUDA microbenchmarks.

Reviewers: jholewinski, broune, eliben

Subscribers: llvm-commits, jholewinski

Differential Revision: http://reviews.llvm.org/D11201

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242437 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-16 20:13:48 +00:00
..
ADCE Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
AddDiscriminators IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
AlignmentFromAssumptions [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
ArgumentPromotion Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
AtomicExpand/ARM
BBVectorize Changed renaming of local symbols by inserting a dot vefore the numeric suffix. 2015-05-12 16:47:30 +00:00
BDCE Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
BranchFolding Delete -std-compile-opts. 2014-10-16 20:00:02 +00:00
CodeExtractor Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
CodeGenPrepare AMDGPU: Fix some places missed in rename 2015-06-19 17:39:03 +00:00
ConstantHoisting [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
ConstantMerge [opaque pointer type] Add textual IR support for explicit type parameter to gep operator 2015-03-13 18:20:45 +00:00
ConstProp [ConstantFolding] Fix wrong folding of intrinsic 'convert.from.fp16'. 2015-05-14 18:01:48 +00:00
CorrelatedValuePropagation [CVP] Don't assume Constants of type i1 can be known to be true or false 2015-06-06 04:56:51 +00:00
DeadArgElim Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
DeadStoreElimination IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
EarlyCSE Correct a mistaken comment from 238071 [NFC] 2015-05-23 00:05:43 +00:00
EliminateAvailableExternally Don't change the visibility when converting a definition to a declaration. 2015-07-13 14:18:22 +00:00
Float2Int Reapply r233175 and r233183: float2int. 2015-03-27 10:36:57 +00:00
FunctionAttrs Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
GCOVProfiling IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
GlobalDCE [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
GlobalOpt Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
GVN GVN: tolerate an instruction being replaced without existing in the leaderboard 2015-07-14 21:03:18 +00:00
IndVarSimplify [IndVars] Try to use existing values in RewriteLoopExitValues. 2015-07-09 18:46:12 +00:00
Inline Rename llvm.frameescape and llvm.framerecover to localescape and localrecover 2015-07-07 22:25:32 +00:00
InstCombine [InstCombine] Generalize sub of selects optimization to all BinaryOperators 2015-07-14 22:39:23 +00:00
InstMerge [opaque pointer type] Add textual IR support for explicit type parameter to gep operator 2015-03-13 18:20:45 +00:00
InstSimplify [InstSimplify] Teach InstSimplify how to simplify extractelement 2015-07-13 01:15:53 +00:00
Internalize Internalize: internalize comdat members as a group, and drop comdat on such members. 2015-07-16 17:42:21 +00:00
IPConstantProp Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
IRCE [IRCE] Fix a regression introduced in r232444. 2015-03-24 19:29:18 +00:00
JumpThreading Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
LCSSA Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
LICM [LICM] Don't try to sink values out of loops without any exits 2015-07-12 03:53:05 +00:00
LoadCombine [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
LoopDeletion [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
LoopDistribute [LAA] Merge memchecks for accesses separated by a constant offset 2015-07-08 09:16:33 +00:00
LoopIdiom Remove unnecessary lines from the test in r242068. 2015-07-13 21:50:35 +00:00
LoopInterchange Add support to interchange loops with reductions. 2015-04-23 04:51:44 +00:00
LoopReroll [LSR] canonicalize Prod*(1<<C) to Prod<<C 2015-06-24 19:28:40 +00:00
LoopRotate Disable loop re-rotation for -Oz (patch by Andrey Turetsky) 2015-07-10 10:37:09 +00:00
LoopSimplify [LoopSimplify] Set proper debug location in loop backedge blocks. 2015-06-29 21:30:14 +00:00
LoopStrengthReduce [LSR] don't attempt to promote ephemeral values to indvars 2015-07-13 03:28:53 +00:00
LoopUnroll Tidy-up test case from r242257. 2015-07-15 01:51:51 +00:00
LoopUnswitch Fix PR13851: Preserve metadata for the unswitched branch 2015-06-23 05:31:09 +00:00
LoopVectorize Renamed some uses of unroll to interleave in the vectorizer. 2015-07-11 00:31:11 +00:00
LowerAtomic [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
LowerBitSets LowerBitSets: Ignore bitset entries that do not directly refer to a global. 2015-06-27 00:17:51 +00:00
LowerExpectIntrinsic [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
LowerInvoke Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
LowerSwitch Changed renaming of local symbols by inserting a dot vefore the numeric suffix. 2015-05-12 16:47:30 +00:00
Mem2Reg Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
MemCpyOpt [MemCpyOpt] Do move the memset, but look at its dest's dependencies. 2015-05-21 01:43:39 +00:00
MergeFunc Fix mergefunc infinite loop 2015-07-15 21:51:33 +00:00
MetaRenamer [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
NaryReassociate [NaryReassociate] enhances nsw by leveraging @llvm.assume 2015-07-01 03:38:49 +00:00
ObjCARC Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
PartiallyInlineLibCalls
PhaseOrdering Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
PlaceSafepoints Rename llvm.frameescape and llvm.framerecover to localescape and localrecover 2015-07-07 22:25:32 +00:00
PruneEH [PruneEH] A naked, noinline function can return via InlineAsm 2015-06-27 07:52:53 +00:00
Reassociate [Reassociate] Don't propogate flags when creating negations 2015-06-24 21:27:36 +00:00
Reg2Mem Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
RewriteStatepointsForGC [RewriteStatepointsForGC] Generalized vector phi/select handling for base pointers 2015-06-26 22:47:37 +00:00
SafeStack SafeStack: Create the unsafe stack pointer on demand. 2015-06-22 20:26:54 +00:00
SampleProfile Add function entry counts from sample profiles. 2015-05-13 17:04:29 +00:00
Scalarizer IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
ScalarRepl Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
SCCP [SCCP] Turn loads of null into undef instead of zero initialized values 2015-07-01 05:37:57 +00:00
SeparateConstOffsetFromGEP AMDGPU: Fix some places missed in rename 2015-06-19 17:39:03 +00:00
SimplifyCFG AMDGPU: Fix some places missed in rename 2015-06-19 17:39:03 +00:00
Sink Teach the IR Sink pass to (conservatively) respect convergent annotations. 2015-06-01 17:20:31 +00:00
SLPVectorizer [SLPVectorizer] Try different vectorization factors for store chains 2015-07-08 23:40:55 +00:00
SpeculativeExecution Add a speculative execution pass 2015-05-15 17:54:48 +00:00
SROA [SROA] Don't de-atomic volatile loads and stores 2015-07-14 06:19:58 +00:00
StraightLineStrengthReduce [NVPTX] enable SpeculativeExecution in NVPTX 2015-07-16 20:13:48 +00:00
StripSymbols IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
StructurizeCFG [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
TailCallElim TRE: Just erase dead BBs and tweak the iteration loop not to increment the deleted BB iterator. 2015-02-28 16:47:27 +00:00
TailDup [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
Util Changed renaming of local symbols by inserting a dot vefore the numeric suffix. 2015-05-12 16:47:30 +00:00