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llvm-mirror/test/Transforms
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Hiroshi Yamauchi 0596ae1e4a Add heuristics for irreducible loop metadata under PGO 
Summary:
Add the following heuristics for irreducible loop metadata:

- When an irreducible loop header is missing the loop header weight metadata,
  give it the minimum weight seen among other headers.
- Annotate indirectbr targets with the loop header weight metadata (as they are
  likely to become irreducible loop headers after indirectbr tail duplication.)

These greatly improve the accuracy of the block frequency info of the Python
interpreter loop (eg. from ~3-16x off down to ~40-55% off) and the Python
performance (eg. unpack_sequence from ~50% slower to ~8% faster than GCC) due to
better register allocation under PGO.

Reviewers: davidxl

Reviewed By: davidxl

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39980

llvm-svn: 318693
2017-11-20 21:03:38 +00:00
..
ADCE [ADCE][Dominators] Reapply: Teach ADCE to preserve dominators 2017-08-22 16:30:21 +00:00
AddDiscriminators
AlignmentFromAssumptions
ArgumentPromotion [ArgPromotion] Preserve alignment of byval argument in new alloca 2017-08-04 17:09:11 +00:00
AtomicExpand
BDCE [BDCE] Don't check demanded bits on unsized types 2017-08-16 16:09:22 +00:00
BranchFolding
CalledValuePropagation Add CalledValuePropagation pass 2017-10-25 13:40:08 +00:00
CallSiteSplitting [CallSiteSplitting] Remove some indirection (NFC). 2017-11-18 18:14:13 +00:00
CodeExtractor [PartialInliner] Inline vararg functions that forward varargs. 2017-11-13 10:35:52 +00:00
CodeGenPrepare [CGP] Fix the crash caused by enable of complex addr mode 2017-11-20 05:42:36 +00:00
ConstantHoisting Fix out-of-order stepping behavior in programs with hoisted constants. 2017-11-09 20:01:31 +00:00
ConstantMerge Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
ConstProp
Coroutines [coroutines] Add support for symmetric control transfer (musttail on coro.resumes followed by a suspend) 2017-08-25 02:25:10 +00:00
CorrelatedValuePropagation [CVP] Remove some {s|u}add.with.overflow checks. 2017-11-10 19:13:35 +00:00
CountingFunctionInserter Rename CountingFunctionInserter and use for both mcount and cygprofile calls, before and after inlining 2017-11-14 21:09:45 +00:00
CrossDSOCFI [cfi] Build __cfi_check as Thumb when applicable. 2017-08-29 22:29:15 +00:00
DCE Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
DeadArgElim Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
DeadStoreElimination Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
DivRemPairs [DivRemPairs] split tests per target to account for bots that don't build for all targets 2017-09-09 14:10:59 +00:00
EarlyCSE Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
EliminateAvailableExternally
ExpandMemCmp/X86 re-land [ExpandMemCmp] Split ExpandMemCmp from CodeGen into its own pass." 2017-11-03 12:12:27 +00:00
Float2Int
ForcedFunctionAttrs
FunctionAttrs Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
FunctionImport Fix bot failures by requiring x86 target 2017-08-19 19:15:04 +00:00
GCOVProfiling Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
GlobalDCE
GlobalMerge Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
GlobalOpt Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
GlobalSplit
GuardWidening
GVN Let llvm.invariant.group.barrier accepts pointer to any address space 2017-11-16 16:32:16 +00:00
GVNHoist Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
GVNSink Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
IndVarSimplify IndVarSimplify: preserve debug information attached to widened PHI nodes. 2017-11-02 23:17:06 +00:00
InferAddressSpaces InferAddressSpaces: Fix bug about replacing addrspacecast 2017-10-30 21:19:41 +00:00
InferFunctionAttrs
Inline Move verbosity check for remarks to the diag handler 2017-10-04 04:26:23 +00:00
InstCombine [LibCallSimplifier] allow splat vectors for pow(x, 0.5) -> sqrt() transforms 2017-11-19 16:42:27 +00:00
InstMerge
InstNamer
InstSimplify [InstSimplify] fold and/or of fcmp ord/uno when operand is known nnan 2017-11-19 15:34:27 +00:00
InterleavedAccess [X86][LLVM]Expanding Supports lowerInterleaved{store|load}() in X86InterleavedAccess (VF64 stride 3-4) 2017-10-02 07:35:25 +00:00
Internalize
IPConstantProp
IRCE [IRCE] Smart range intersection 2017-11-20 06:07:57 +00:00
JumpThreading Fix some misc. -enable-var-scope violations 2017-11-13 01:47:52 +00:00
LCSSA
LICM [LICM] Fix PR35342 2017-11-17 20:38:25 +00:00
LoadStoreVectorizer Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
LoopDataPrefetch
LoopDeletion [Dominators] Teach LoopDeletion to use the new incremental API 2017-08-02 18:17:52 +00:00
LoopDistribute
LoopIdiom Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
LoopInterchange [LoopInterchange] Fix phi node ordering miscompile. 2017-10-21 13:58:37 +00:00
LoopLoadElim
LoopPredication [LoopPredication] Enable predication when latchCheckIV is wider than rangeCheck 2017-11-02 21:21:02 +00:00
LoopReroll Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
LoopRotate Fix llvm/test/Transforms/LoopRotate/pr35210.ll in rL318237, it uses debug options. 2017-11-15 06:46:58 +00:00
LoopSimplify [SCEV] Teach SCEV to find maxBECount when loop endbound is variant 2017-10-13 14:30:43 +00:00
LoopSimplifyCFG
LoopStrengthReduce Revert r314886 "[X86] Improvement in CodeGen instruction selection for LEAs (re-applying post required revision changes.)" 2017-10-04 17:54:06 +00:00
LoopUnroll loop-unroll: teach remapInstruction to update dbg.value intrinsics. 2017-11-01 23:12:35 +00:00
LoopUnswitch [LoopUnswitch] Fix a simple bug which disables loop unswitch for select statement 2017-08-29 21:45:11 +00:00
LoopVectorize [LV] Model masking in VPlan, introducing VPInstructions 2017-11-20 12:01:47 +00:00
LoopVersioning
LoopVersioningLICM
LowerAtomic LowerAtomic: Don't skip optnone functions; atomic still need lowering (PR34020) 2017-08-23 15:43:28 +00:00
LowerExpectIntrinsic
LowerGuardIntrinsic
LowerInvoke
LowerSwitch
LowerTypeTests Current implementation of Value::replaceUsesExceptBlockAddr() uses UseList 2017-11-17 00:30:24 +00:00
Mem2Reg Re-land r313825: "[IR] Add llvm.dbg.addr, a control-dependent version of llvm.dbg.declare" 2017-09-21 19:52:03 +00:00
MemCpyOpt Fix some misc. -enable-var-scope violations 2017-11-13 01:47:52 +00:00
MergeFunc [MergeFunctions] Merge small functions if possible without a thunk. 2017-10-15 12:29:09 +00:00
MergeICmps Re-land "[MergeICmps] Disable mergeicmps if the target does not want to handle memcmp expansion." 2017-10-10 08:00:45 +00:00
MetaRenamer [MetaRenamer] Leave @main alone. 2017-08-01 05:14:45 +00:00
NameAnonGlobals
NaryReassociate
NewGVN Add an @llvm.sideeffect intrinsic 2017-11-08 21:59:51 +00:00
ObjCARC ObjCARC: do not increment past the end of the BB 2017-10-24 00:09:10 +00:00
PartiallyInlineLibCalls [PartialInlineLibCalls] Teach PartialInlineLibCalls to honor nobuiltin, properly check the function signature, and check TLI::has 2017-10-28 00:36:58 +00:00
PGOProfile Add heuristics for irreducible loop metadata under PGO 2017-11-20 21:03:38 +00:00
PhaseOrdering [PassManager, SimplifyCFG] add test for PR34603 / D38566; NFC 2017-11-15 16:37:30 +00:00
PlaceSafepoints All libcalls should be considered to be GC-leaf functions. 2017-07-27 16:49:39 +00:00
PreISelIntrinsicLowering
PruneEH
Reassociate [Reassociation] regenerate test checks; NFC 2017-11-13 19:46:28 +00:00
Reg2Mem
RewriteStatepointsForGC Strip off invariant.start because memory locations arent invariant 2017-11-02 18:24:04 +00:00
SafeStack Parse and print DIExpressions inline to ease IR and MIR testing 2017-08-23 20:31:27 +00:00
SampleProfile Include already promoted counts when computing SUM for VP. 2017-11-06 19:52:49 +00:00
Scalarizer Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
SCCP Recommit r315288: [SCCP] Propagate integer range info for parameters in IPSCCP. 2017-10-30 10:07:42 +00:00
SeparateConstOffsetFromGEP
SimpleLoopUnswitch [PM/Unswitch] Teach SimpleLoopUnswitch to do non-trivial unswitching, 2017-11-17 19:58:36 +00:00
SimplifyCFG Fix some misc. -enable-var-scope violations 2017-11-13 01:47:52 +00:00
Sink Enhance synchscope representation 2017-07-11 22:23:00 +00:00
SLPVectorizer [SLP] Added more missed optimization remarks 2017-11-15 17:04:53 +00:00
SpeculativeExecution
SROA [SROA] Correctly invalidate analyses when dead instructions deleted 2017-11-20 18:33:38 +00:00
StraightLineStrengthReduce
StripDeadPrototypes
StripSymbols Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
StructurizeCFG [Dominators] Include infinite loops in PostDominatorTree 2017-08-15 18:14:57 +00:00
TailCallElim [TRE] Add another test for OptRemark. 2017-07-19 21:39:51 +00:00
ThinLTOBitcodeWriter ModuleUtils: Stop using comdat members to generate unique module ids. 2017-10-05 21:54:53 +00:00
Util [InstCombine] Add a flag to disable LowerDbgDeclare 2017-09-13 01:43:25 +00:00
WholeProgramDevirt [LTO][ThinLTO] Use the linker resolutions to mark global values as dso_local. 2017-11-04 17:04:39 +00:00