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llvm-6502/lib/Target/AArch64
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Kristof Beyls 78c4ef5120 Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 
As is described at http://llvm.org/bugs/show_bug.cgi?id=22408, the GNU linkers
ld.bfd and ld.gold currently only support a subset of the whole range of AArch64
ELF TLS relocations. Furthermore, they assume that some of the code sequences to
access thread-local variables are produced in a very specific sequence.
When the sequence is not as the linker expects, it can silently mis-relaxe/mis-optimize
the instructions.
Even if that wouldn't be the case, it's good to produce the exact sequence,
as that ensures that linkers can perform optimizing relaxations.

This patch:

* implements support for 16MiB TLS area size instead of 4GiB TLS area size. Ideally clang
  would grow an -mtls-size option to allow support for both, but that's not part of this patch.
* by default doesn't produce local dynamic access patterns, as even modern ld.bfd and ld.gold
  linkers do not support the associated relocations. An option (-aarch64-elf-ldtls-generation)
  is added to enable generation of local dynamic code sequence, but is off by default.
* makes sure that the exact expected code sequence for local dynamic and general dynamic
  accesses is produced, by making use of a new pseudo instruction. The patch also removes
  two (AArch64ISD::TLSDESC_BLR, AArch64ISD::TLSDESC_CALL) pre-existing AArch64-specific pseudo
  SDNode instructions that are superseded by the new one (TLSDESC_CALLSEQ).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231227 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-04 09:12:08 +00:00
..
AsmParser Fix some unnoticed/unwanted behavior change from r222319. 2015-02-04 03:10:03 +00:00
Disassembler unique_ptrify the RelInfo parameter to TargetRegistry::createMCSymbolizer 2015-01-18 20:45:48 +00:00
InstPrinter [AArch64] Allow access to all system registers with MRS/MSR instructions. 2014-10-01 10:13:59 +00:00
MCTargetDesc Remove MCStreamer.h include from MCContext.h and explictly include it where necessary. NFC 2015-03-04 01:24:11 +00:00
TargetInfo AArch64: stop trying to take control of all UnknownArch triples. 2014-08-08 08:27:44 +00:00
Utils Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 2015-03-04 09:12:08 +00:00
AArch64.h [PM] Remove a bunch of stale TTI creation method declarations. I nuked 2015-02-01 00:22:15 +00:00
AArch64.td Adding support to LLVM for targeting Cortex-A72 2015-02-04 13:31:29 +00:00
AArch64A53Fix835769.cpp Clean up some uses of getSubtarget in AArch64. 2015-01-30 01:10:24 +00:00
AArch64A57FPLoadBalancing.cpp Remove subtarget dependence in pass pipeline setup for AArch64. 2015-03-03 23:22:40 +00:00
AArch64AddressTypePromotion.cpp Fix typos in comments 2014-08-15 22:17:28 +00:00
AArch64AdvSIMDScalarPass.cpp This only needs TargetInstrInfo, not the specialized one. 2015-01-30 01:10:18 +00:00
AArch64AsmPrinter.cpp Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 2015-03-04 09:12:08 +00:00
AArch64BranchRelaxation.cpp Migrate AArch64 except for TTI and AsmPrinter away from getSubtargetImpl. 2015-01-28 03:51:33 +00:00
AArch64CallingConvention.h Move DataLayout back to the TargetMachine from TargetSubtargetInfo 2015-01-26 19:03:15 +00:00
AArch64CallingConvention.td Move DataLayout back to the TargetMachine from TargetSubtargetInfo 2015-01-26 19:03:15 +00:00
AArch64CleanupLocalDynamicTLSPass.cpp Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 2015-03-04 09:12:08 +00:00
AArch64CollectLOH.cpp Clean up some uses of getSubtarget in AArch64. 2015-01-30 01:10:24 +00:00
AArch64ConditionalCompares.cpp AArch64: Canonicalize access to function attributes, NFC 2015-02-14 02:09:06 +00:00
AArch64ConditionOptimizer.cpp Migrate AArch64 except for TTI and AsmPrinter away from getSubtargetImpl. 2015-01-28 03:51:33 +00:00
AArch64DeadRegisterDefinitionsPass.cpp Remove 'virtual' keyword from methods markedwith 'override' keyword. 2014-08-30 16:48:34 +00:00
AArch64ExpandPseudoInsts.cpp MathExtras: Bring Count(Trailing|Leading)Ones and CountPopulation in line with countTrailingZeros 2015-02-12 15:35:40 +00:00
AArch64FastISel.cpp Clean up some uses of getSubtarget in AArch64. 2015-01-30 01:10:24 +00:00
AArch64FrameLowering.cpp AArch64: Canonicalize access to function attributes, NFC 2015-02-14 02:09:06 +00:00
AArch64FrameLowering.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AArch64InstrAtomics.td Make use of isAtLeastRelease/Acquire in the ARM/AArch64 backends 2014-08-18 16:48:58 +00:00
AArch64InstrFormats.td Replace neverHasSideEffects=1 with hasSideEffects=0 in all .td files. 2014-11-26 00:46:26 +00:00
AArch64InstrInfo.cpp ArrayRefize memory operand folding. NFC. 2015-02-28 12:04:00 +00:00
AArch64InstrInfo.h ArrayRefize memory operand folding. NFC. 2015-02-28 12:04:00 +00:00
AArch64InstrInfo.td Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 2015-03-04 09:12:08 +00:00
AArch64ISelDAGToDAG.cpp AArch64: Add debug message for large shift constants. 2015-02-25 18:03:50 +00:00
AArch64ISelLowering.cpp Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 2015-03-04 09:12:08 +00:00
AArch64ISelLowering.h Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 2015-03-04 09:12:08 +00:00
AArch64LoadStoreOptimizer.cpp Migrate AArch64 except for TTI and AsmPrinter away from getSubtargetImpl. 2015-01-28 03:51:33 +00:00
AArch64MachineCombinerPattern.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AArch64MachineFunctionInfo.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AArch64MCInstLower.cpp Fix PR22408 - LLVM producing AArch64 TLS relocations that GNU linkers cannot handle yet. 2015-03-04 09:12:08 +00:00
AArch64MCInstLower.h Delete unused argument in AArch64MCInstLower constructor: it doesn't 2014-08-19 21:51:08 +00:00
AArch64PBQPRegAlloc.cpp Avoid copying LiveInterval, this could lead to a double-delete 2015-03-03 22:25:48 +00:00
AArch64PBQPRegAlloc.h [AArch64] Cleanup A57PBQPConstraints 2014-10-22 12:40:20 +00:00
AArch64PerfectShuffle.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AArch64PromoteConstant.cpp [AArch64] fix an invalid-iterator-use bug. 2015-03-02 00:17:18 +00:00
AArch64RegisterInfo.cpp AArch64: add backend option to reserve x18 (platform register) 2015-01-21 15:43:31 +00:00
AArch64RegisterInfo.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AArch64RegisterInfo.td Teach the AArch64 backend about v4f16 and v8f16 2014-08-27 16:16:04 +00:00
AArch64SchedA53.td Fix typos 2014-05-31 21:26:28 +00:00
AArch64SchedA57.td [AArch64] Enable partial & runtime unrolling on cortex-a57. 2014-10-09 10:13:27 +00:00
AArch64SchedA57WriteRes.td [AArch64] Refines the Cortex-A57 Machine Model 2014-09-29 21:27:36 +00:00
AArch64SchedCyclone.td AArch64/ARM64: move ARM64 into AArch64's place 2014-05-24 12:50:23 +00:00
AArch64Schedule.td AArch64/ARM64: move ARM64 into AArch64's place 2014-05-24 12:50:23 +00:00
AArch64SelectionDAGInfo.cpp Get the cached subtarget off the MachineFunction rather than 2015-02-20 08:39:06 +00:00
AArch64SelectionDAGInfo.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AArch64StorePairSuppress.cpp Clean up the AArch64 store pair suppression pass initialization 2015-01-27 07:54:36 +00:00
AArch64Subtarget.cpp Remove getSubtargetImpl from AArch64ISelLowering and cache the 2015-01-29 00:19:42 +00:00
AArch64Subtarget.h Move DataLayout back to the TargetMachine from TargetSubtargetInfo 2015-01-26 19:03:15 +00:00
AArch64TargetMachine.cpp Remove subtarget dependence in pass pipeline setup for AArch64. 2015-03-03 23:22:40 +00:00
AArch64TargetMachine.h [multiversion] Switch all of the targets over to use the 2015-02-01 13:20:00 +00:00
AArch64TargetObjectFile.cpp AArch64/ARM64: move ARM64 into AArch64's place 2014-05-24 12:50:23 +00:00
AArch64TargetObjectFile.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AArch64TargetTransformInfo.cpp Make some non-constant static variables non-static or fully const. 2015-03-01 18:09:56 +00:00
AArch64TargetTransformInfo.h [multiversion] Remove the function parameter from the unrolling 2015-02-01 14:31:23 +00:00
CMakeLists.txt [AArch64] Add workaround for Cortex-A53 erratum (835769) 2014-10-13 10:12:35 +00:00
LLVMBuild.txt Prune redundant libdeps. 2014-07-24 11:45:27 +00:00
Makefile AArch64/ARM64: move ARM64 into AArch64's place 2014-05-24 12:50:23 +00:00