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JF Bastien 2920061105 ARM64: improve non-zero memset isel by ~2x 
Summary:
I added a few ARM64 memset codegen tests in r341406 and r341493, and annotated
where the generated code was bad. This patch fixes the majority of the issues by
requesting that a 2xi64 vector be used for memset of 32 bytes and above.

The patch leaves the former request for f128 unchanged, despite f128
materialization being suboptimal: doing otherwise runs into other asserts in
isel and makes this patch too broad.

This patch hides the issue that was present in bzero_40_stack and bzero_72_stack
because the code now generates in a better order which doesn't have the store
offset issue. I'm not aware of that issue appearing elsewhere at the moment.

<rdar://problem/44157755>

Reviewers: t.p.northover, MatzeB, javed.absar

Subscribers: eraman, kristof.beyls, chrib, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D51706

llvm-svn: 341558
 		2018-09-06 16:03:32 +00:00
..
AsmParser [AArch64] Add Tiny Code Model for AArch64 2018-08-22 11:31:39 +00:00
Disassembler [aarch64][mc] Don't lookup symbols when there is no symbol lookup callback 2018-08-21 15:47:25 +00:00
InstPrinter [AArch64][ARM] Armv8.4-A: Trace synchronization barrier instruction 2018-07-06 08:03:12 +00:00
MCTargetDesc Find PLT entries for x86, x86_64, and AArch64. 2018-08-24 15:21:56 +00:00
TargetInfo
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Utils [MinGW] [AArch64] Add stubs for potential automatic dllimported variables 2018-09-04 20:56:21 +00:00
AArch64.h Revert r331816 and r331820 - [globalisel] Add a combiner helpers for extending loads and use them in a pre-legalize combiner for AArch64 2018-05-09 05:00:17 +00:00
AArch64.td [ARM/AArch64] Support FP16 +fp16fml instructions 2018-08-17 11:29:49 +00:00
AArch64A53Fix835769.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64A57FPLoadBalancing.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64AdvSIMDScalarPass.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64AsmPrinter.cpp [COFF] Hoist constant pool handling from X86AsmPrinter into AsmPrinter 2018-07-25 18:35:31 +00:00
AArch64CallLowering.cpp [GlobalISel] Rewrite CallLowering::lowerReturn to accept multiple VRegs per Value 2018-08-02 08:33:31 +00:00
AArch64CallLowering.h [GlobalISel] Rewrite CallLowering::lowerReturn to accept multiple VRegs per Value 2018-08-02 08:33:31 +00:00
AArch64CallingConvention.h
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AArch64CallingConvention.td AArch64: Implement support for the shadowcallstack attribute. 2018-04-04 21:55:44 +00:00
AArch64CleanupLocalDynamicTLSPass.cpp MachineFunction: Return reference from getFunction(); NFC 2017-12-15 22:22:58 +00:00
AArch64CollectLOH.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64CondBrTuning.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64ConditionOptimizer.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64ConditionalCompares.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64DeadRegisterDefinitionsPass.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64ExpandPseudoInsts.cpp [AArch64] Add Tiny Code Model for AArch64 2018-08-22 11:31:39 +00:00
AArch64FalkorHWPFFix.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64FastISel.cpp DAG: Add calling convention argument to calling convention funcs 2018-07-28 13:25:19 +00:00
AArch64FrameLowering.cpp [AArch64] Add Tiny Code Model for AArch64 2018-08-22 11:31:39 +00:00
AArch64FrameLowering.h Remove \brief commands from doxygen comments. 2018-05-01 15:54:18 +00:00
AArch64GenRegisterBankInfo.def
…
AArch64ISelDAGToDAG.cpp [SDAG] Remove the reliance on MI's allocation strategy for 2018-08-14 23:30:32 +00:00
AArch64ISelLowering.cpp ARM64: improve non-zero memset isel by ~2x 2018-09-06 16:03:32 +00:00
AArch64ISelLowering.h [AArch64] Add Tiny Code Model for AArch64 2018-08-22 11:31:39 +00:00
AArch64InstrAtomics.td [AArch64] Improve v8.1-A code-gen for atomic load-and 2018-02-12 17:03:11 +00:00
AArch64InstrFormats.td [AArch64] Optimise load(adr address) to ldr address 2018-08-30 11:55:16 +00:00
AArch64InstrInfo.cpp [MinGW] [AArch64] Add stubs for potential automatic dllimported variables 2018-09-04 20:56:21 +00:00
AArch64InstrInfo.h [MachineOutliner][AArch64] Add support for saving LR to a register 2018-07-30 17:45:28 +00:00
AArch64InstrInfo.td [AArch64] Optimise load(adr address) to ldr address 2018-08-30 11:55:16 +00:00
AArch64InstructionSelector.cpp [AArch64] Add Tiny Code Model for AArch64 2018-08-22 11:31:39 +00:00
AArch64LegalizerInfo.cpp [AArch64][GlobalISel] Make G_BLOCK_ADDR legal. 2018-07-31 00:08:56 +00:00
AArch64LegalizerInfo.h [aarch64][globalisel] Define G_ATOMIC_CMPXCHG and G_ATOMICRMW_* and make them legal 2017-11-28 20:21:15 +00:00
AArch64LoadStoreOptimizer.cpp [MI] Change the array of `MachineMemOperand` pointers to be 2018-08-16 21:30:05 +00:00
AArch64MCInstLower.cpp [MinGW] [AArch64] Add stubs for potential automatic dllimported variables 2018-09-04 20:56:21 +00:00
AArch64MCInstLower.h
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AArch64MachineFunctionInfo.h Remove trailing space 2018-07-30 19:41:25 +00:00
AArch64MacroFusion.cpp Remove \brief commands from doxygen comments. 2018-05-01 15:54:18 +00:00
AArch64MacroFusion.h
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AArch64PBQPRegAlloc.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64PBQPRegAlloc.h
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AArch64PerfectShuffle.h
…
AArch64PromoteConstant.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64RedundantCopyElimination.cpp [CodeGen][AArch64] Use RegUnits to track register aliases. (NFC) 2018-05-23 17:49:38 +00:00
AArch64RegisterBankInfo.cpp
…
AArch64RegisterBankInfo.h
…
AArch64RegisterBanks.td
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AArch64RegisterInfo.cpp [CodeGen] emit inline asm clobber list warnings for reserved (cont) 2018-08-30 12:52:35 +00:00
AArch64RegisterInfo.h [CodeGen] emit inline asm clobber list warnings for reserved (cont) 2018-08-30 12:52:35 +00:00
AArch64RegisterInfo.td [AArch64][SVE] Asm: Add MOVPRFX instructions. 2018-07-30 15:42:46 +00:00
AArch64SIMDInstrOpt.cpp [TargetSchedule] shrink interface for init(); NFCI 2018-04-08 19:56:04 +00:00
AArch64SVEInstrInfo.td [AArch64][SVE] Asm: Enable instructions to be prefixed. 2018-07-30 16:05:45 +00:00
AArch64SchedA53.td [AArch64] Clean-up a few over-eager regexps in models. 2018-03-23 11:00:42 +00:00
AArch64SchedA57.td
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AArch64SchedA57WriteRes.td
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AArch64SchedCyclone.td
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AArch64SchedExynosM1.td [ExynosM1][Sched] Fix resource usage in scheduling model. 2018-06-11 07:33:08 +00:00
AArch64SchedExynosM3.td [ExynosM3] Fix scheduling info. 2018-05-18 13:10:41 +00:00
AArch64SchedFalkor.td [TableGen] When trying to reuse a scheduler class for instructions from an InstRW, make sure we haven't already seen another InstRW containing this instruction on this CPU. 2018-03-18 19:56:15 +00:00
AArch64SchedFalkorDetails.td [AArch64][Falkor] Correct load/store increment scheduling details 2018-03-20 13:46:35 +00:00
AArch64SchedKryo.td [TableGen] When trying to reuse a scheduler class for instructions from an InstRW, make sure we haven't already seen another InstRW containing this instruction on this CPU. 2018-03-18 19:56:15 +00:00
AArch64SchedKryoDetails.td
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AArch64SchedThunderX.td [TableGen] When trying to reuse a scheduler class for instructions from an InstRW, make sure we haven't already seen another InstRW containing this instruction on this CPU. 2018-03-18 19:56:15 +00:00
AArch64SchedThunderX2T99.td [TableGen] Emit a fatal error on inconsistencies in resource units vs cycles. 2018-06-13 09:41:49 +00:00
AArch64Schedule.td
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AArch64SelectionDAGInfo.cpp AArch64/X86: Factor out common bzero logic; NFC 2017-12-18 23:14:28 +00:00
AArch64SelectionDAGInfo.h
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AArch64StorePairSuppress.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
AArch64Subtarget.cpp [MinGW] Move code for indicating "potentially not DSO local" into shouldAssumeDSOLocal. NFC. 2018-09-04 20:56:28 +00:00
AArch64Subtarget.h [ARM/AArch64] Support FP16 +fp16fml instructions 2018-08-17 11:29:49 +00:00
AArch64SystemOperands.td [AArch64][SVE] Asm: Add SVE System registers 2018-08-20 09:16:59 +00:00
AArch64TargetMachine.cpp [AArch64] Add Tiny Code Model for AArch64 2018-08-22 11:31:39 +00:00
AArch64TargetMachine.h (Re-landing) Expose a TargetMachine::getTargetTransformInfo function 2017-12-22 18:21:59 +00:00
AArch64TargetObjectFile.cpp [AArch64] DWARF: do not generate AT_location for thread local 2018-08-01 23:46:49 +00:00
AArch64TargetObjectFile.h Move TargetLoweringObjectFile from CodeGen to Target to fix layering 2018-03-23 23:58:19 +00:00
AArch64TargetTransformInfo.cpp Remove trailing space 2018-07-30 19:41:25 +00:00
AArch64TargetTransformInfo.h [TTI, AArch64] Add transpose shuffle kind 2018-04-26 13:48:33 +00:00
CMakeLists.txt Revert r331816 and r331820 - [globalisel] Add a combiner helpers for extending loads and use them in a pre-legalize combiner for AArch64 2018-05-09 05:00:17 +00:00
LLVMBuild.txt
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SVEInstrFormats.td [AArch64][SVE] Asm: Enable instructions to be prefixed. 2018-07-30 16:05:45 +00:00