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193e898f75
llvm/test/Transforms
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Sanjay Patel 193e898f75 [DivRempairs] add a pass to optimize div/rem pairs (PR31028) 
This is intended to be a superset of the functionality from D31037 (EarlyCSE) but implemented 
as an independent pass, so there's no stretching of scope and feature creep for an existing pass. 
I also proposed a weaker version of this for SimplifyCFG in D30910. And I initially had almost 
this same functionality as an addition to CGP in the motivating example of PR31028:
https://bugs.llvm.org/show_bug.cgi?id=31028

The advantage of positioning this ahead of SimplifyCFG in the pass pipeline is that it can allow 
more flattening. But it needs to be after passes (InstCombine) that could sink a div/rem and
undo the hoisting that is done here.

Decomposing remainder may allow removing some code from the backend (PPC and possibly others).

Differential Revision: https://reviews.llvm.org/D37121 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312862 91177308-0d34-0410-b5e6-96231b3b80d8
2017-09-09 13:38:18 +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
CodeExtractor Clean up a test case 2017-06-27 21:35:49 +00:00
CodeGenPrepare [CGP] Fix the rematerialization of gc.relocates 2017-08-17 05:48:30 +00:00
ConstantHoisting [ConstantHoisting] Remove dupliate logic in constant hoisting 2017-07-10 20:45:34 +00:00
ConstantMerge Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
ConstProp [X86] Replace 'REQUIRES: x86' in tests with 'REQUIRES: x86-registered-target' which seems to be the correct way to make them run on an x86 build. 2017-06-04 08:21:58 +00:00
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 [LVI] Constant-propagate a zero extension of the switch condition value through case edges 2017-08-03 21:11:30 +00:00
CountingFunctionInserter
CrossDSOCFI [cfi] Build __cfi_check as Thumb when applicable. 2017-08-29 22:29:15 +00:00
DCE Add strictfp attribute to prevent unwanted optimizations of libm calls 2017-08-14 21:15:13 +00:00
DeadArgElim Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
DeadStoreElimination Revert r310055, it caused PR34074. 2017-08-04 20:40:38 +00:00
DivRemPairs [DivRempairs] add a pass to optimize div/rem pairs (PR31028) 2017-09-09 13:38:18 +00:00
EarlyCSE [EarlyCSE] Handle calls with no MemorySSA info. 2017-07-14 20:13:21 +00:00
EliminateAvailableExternally
Float2Int
ForcedFunctionAttrs
FunctionAttrs Support arbitrary address space pointers in masked gather/scatter intrinsics. 2017-05-03 12:28:54 +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 [PM] Teach the PGO instrumentation pasess to run GlobalDCE before 2017-05-25 07:15:09 +00:00
GlobalMerge Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
GlobalOpt Revert r312318, r312325, r312424, r312489 2017-09-07 23:20:35 +00:00
GlobalSplit
GuardWidening
GVN Split opt-remark YAML and opt output testing on this test 2017-09-05 18:03:39 +00:00
GVNHoist
GVNSink Changed a comparison operator for std::stable_sort to implement strict weak ordering. 2017-06-08 17:27:40 +00:00
IndVarSimplify [SCEV/IndVars] Always compute loop exiting values if the backedge count is 0 2017-08-01 22:37:58 +00:00
InferAddressSpaces [InferAddressSpaces] Fix assertion about null pointer 2017-07-07 02:40:13 +00:00
InferFunctionAttrs Add argmononly attribute to strlen and wcslen, i.e. they only read memory (string) passed to them. 2017-06-18 03:10:26 +00:00
Inline Add llvm.codeview.annotation to implement MSVC __annotation 2017-09-05 20:14:58 +00:00
InstCombine [ValueTracking, InstCombine] canonicalize fcmp ord/uno with non-NAN ops to null constants 2017-09-05 23:13:13 +00:00
InstMerge
InstNamer Add basic test case for -instnamer 2017-05-08 23:18:46 +00:00
InstSimplify InstSimplify: canonicalize is idempotent 2017-09-07 01:21:43 +00:00
InterleavedAccess [X86][LLVM]Expanding Supports lowerInterleavedLoad() in X86InterleavedAccess (VF{8|16|32} stride 3). 2017-09-07 14:02:13 +00:00
Internalize
IPConstantProp
IRCE Re-enable "[IRCE] Identify loops with latch comparison against current IV value" 2017-09-08 10:15:05 +00:00
JumpThreading Disable jump threading into loop headers 2017-09-06 19:36:58 +00:00
LCSSA
LICM Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
LoadStoreVectorizer
LoopDataPrefetch
LoopDeletion [Dominators] Teach LoopDeletion to use the new incremental API 2017-08-02 18:17:52 +00:00
LoopDistribute
LoopIdiom Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
LoopInterchange [LoopInterchange] Skip zext instructions when looking for induction var. 2017-08-25 16:52:29 +00:00
LoopLoadElim
LoopPredication
LoopReroll Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
LoopRotate Parse and print DIExpressions inline to ease IR and MIR testing 2017-08-23 20:31:27 +00:00
LoopSimplify Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
LoopSimplifyCFG
LoopStrengthReduce [LSR] Fix Shadow IV in case of integer overflow 2017-08-29 07:32:20 +00:00
LoopUnroll [LoopUnroll][DebugInfo] Don't add metadata to unrolled remainder loop 2017-09-04 08:12:16 +00:00
LoopUnswitch [LoopUnswitch] Fix a simple bug which disables loop unswitch for select statement 2017-08-29 21:45:11 +00:00
LoopVectorize LoopVectorize: MaxVF should not be larger than the loop trip count 2017-09-04 08:35:13 +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 Fix builin_expect lowering bug 2017-06-07 18:32:24 +00:00
LowerGuardIntrinsic
LowerInvoke
LowerSwitch
LowerTypeTests [cfi] Avoid branch veneers in jump tables when possible. 2017-08-29 22:40:19 +00:00
Mem2Reg Parse and print DIExpressions inline to ease IR and MIR testing 2017-08-23 20:31:27 +00:00
MemCpyOpt
MergeFunc Parse and print DIExpressions inline to ease IR and MIR testing 2017-08-23 20:31:27 +00:00
MergeICmps Reland rL312315: [MergeICmps] MergeICmps is a new optimization pass that turns chains of integer 2017-09-01 10:56:34 +00:00
MetaRenamer [MetaRenamer] Leave @main alone. 2017-08-01 05:14:45 +00:00
NameAnonGlobals
NaryReassociate
NewGVN NewGVN: Fix PR 34430 - we need to look through predicateinfo copies to detect self-cycles of phi nodes. We also need to not ignore certain types of arguments when testing whether the phi has a backedge or was originally constant. 2017-09-05 02:17:43 +00:00
ObjCARC [ObjCARC] Pass the correct BasicBlock to fix assertion failure. 2017-08-31 18:27:47 +00:00
PartiallyInlineLibCalls
PGOProfile Add null check for promoted direct call 2017-08-29 15:28:12 +00:00
PhaseOrdering
PlaceSafepoints All libcalls should be considered to be GC-leaf functions. 2017-07-27 16:49:39 +00:00
PreISelIntrinsicLowering
PruneEH
Reassociate [Reassociate] Do not drop debug location if replacement is missing 2017-08-24 09:05:00 +00:00
Reg2Mem
RewriteStatepointsForGC All libcalls should be considered to be GC-leaf functions. 2017-07-27 16:49:39 +00:00
SafeStack Parse and print DIExpressions inline to ease IR and MIR testing 2017-08-23 20:31:27 +00:00
SampleProfile Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
Scalarizer Remove the obsolete offset parameter from @llvm.dbg.value 2017-07-28 20:21:02 +00:00
SCCP [IPSCCP] Guard a user of getInitializer with hasDefinitiveInitializer 2017-07-31 17:47:07 +00:00
SeparateConstOffsetFromGEP
SimpleLoopUnswitch [PM/Unswitch] Fix a bug in the domtree update logic for the new unswitch 2017-05-25 06:33:36 +00:00
SimplifyCFG [TTI] Fix getGEPCost() for geps with a single operand. 2017-09-01 19:54:08 +00:00
Sink Enhance synchscope representation 2017-07-11 22:23:00 +00:00
SLPVectorizer [SLP] Support for horizontal min/max reduction. 2017-09-08 13:49:36 +00:00
SpeculativeExecution Revert r301950: SpeculativeExecution: Stop using whitelist for costs 2017-05-10 12:30:07 +00:00
SROA Parse and print DIExpressions inline to ease IR and MIR testing 2017-08-23 20:31:27 +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 ThinLTO Minimized Bitcode File Size Reduction 2017-07-21 17:25:20 +00:00
Util Canonicalize the representation of empty an expression in DIGlobalVariableExpression 2017-08-30 18:06:51 +00:00
WholeProgramDevirt WholeProgramDevirt: When promoting for single-impl devirt, also rename the comdat. 2017-09-08 00:10:53 +00:00