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https://github.com/RPCS3/llvm-mirror.git
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9de5355969
Summary: V8->V9: - cleanup tests V7->V8: - addressed feedback from David: - switched to range-based 'for' loops - fixed formatting of tests V6->V7: - rebased and adjusted AsmPrinter args - CamelCased .td, fixed formatting, cleaned up names, removed unused patterns - diffstat: 3 files changed, 203 insertions(+), 227 deletions(-) V5->V6: - addressed feedback from Chandler: - reinstated full verbose standard banner in all files - fixed variables that were not in CamelCase - fixed names of #ifdef in header files - removed redundant braces in if/else chains with single statements - fixed comments - removed trailing empty line - dropped debug annotations from tests - diffstat of these changes: 46 files changed, 456 insertions(+), 469 deletions(-) V4->V5: - fix setLoadExtAction() interface - clang-formated all where it made sense V3->V4: - added CODE_OWNERS entry for BPF backend V2->V3: - fix metadata in tests V1->V2: - addressed feedback from Tom and Matt - removed top level change to configure (now everything via 'experimental-backend') - reworked error reporting via DiagnosticInfo (similar to R600) - added few more tests - added cmake build - added Triple::bpf - tested on linux and darwin V1 cover letter: --------------------- recently linux gained "universal in-kernel virtual machine" which is called eBPF or extended BPF. The name comes from "Berkeley Packet Filter", since new instruction set is based on it. This patch adds a new backend that emits extended BPF instruction set. The concept and development are covered by the following articles: http://lwn.net/Articles/599755/ http://lwn.net/Articles/575531/ http://lwn.net/Articles/603983/ http://lwn.net/Articles/606089/ http://lwn.net/Articles/612878/ One of use cases: dtrace/systemtap alternative. bpf syscall manpage: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4fc1a460f3017e958e6a8ea560ea0afd91bf6fe instruction set description and differences vs classic BPF: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/filter.txt Short summary of instruction set: - 64-bit registers R0 - return value from in-kernel function, and exit value for BPF program R1 - R5 - arguments from BPF program to in-kernel function R6 - R9 - callee saved registers that in-kernel function will preserve R10 - read-only frame pointer to access stack - two-operand instructions like +, -, *, mov, load/store - implicit prologue/epilogue (invisible stack pointer) - no floating point, no simd Short history of extended BPF in kernel: interpreter in 3.15, x64 JIT in 3.16, arm64 JIT, verifier, bpf syscall in 3.18, more to come in the future. It's a very small and simple backend. There is no support for global variables, arbitrary function calls, floating point, varargs, exceptions, indirect jumps, arbitrary pointer arithmetic, alloca, etc. From C front-end point of view it's very restricted. It's done on purpose, since kernel rejects all programs that it cannot prove safe. It rejects programs with loops and with memory accesses via arbitrary pointers. When kernel accepts the program it is guaranteed that program will terminate and will not crash the kernel. This patch implements all 'must have' bits. There are several things on TODO list, so this is not the end of development. Most of the code is a boiler plate code, copy-pasted from other backends. Only odd things are lack or < and <= instructions, specialized load_byte intrinsics and 'compare and goto' as single instruction. Current instruction set is fixed, but more instructions can be added in the future. Signed-off-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Subscribers: majnemer, chandlerc, echristo, joerg, pete, rengolin, kristof.beyls, arsenm, t.p.northover, tstellarAMD, aemerson, llvm-commits Differential Revision: http://reviews.llvm.org/D6494 llvm-svn: 227008
177 lines
3.8 KiB
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177 lines
3.8 KiB
Plaintext
This file is a list of the people responsible for ensuring that patches for a
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particular part of LLVM are reviewed, either by themself or by someone else.
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They are also the gatekeepers for their part of LLVM, with the final word on
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what goes in or not.
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The list is sorted by surname and formatted to allow easy grepping and
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beautification by scripts. The fields are: name (N), email (E), web-address
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(W), PGP key ID and fingerprint (P), description (D), and snail-mail address
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(S). Each entry should contain at least the (N), (E) and (D) fields.
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N: Joe Abbey
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E: jabbey@arxan.com
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D: LLVM Bitcode (lib/Bitcode/* include/llvm/Bitcode/*)
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N: Owen Anderson
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E: resistor@mac.com
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D: SelectionDAG (lib/CodeGen/SelectionDAG/*)
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N: Rafael Avila de Espindola
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E: rafael.espindola@gmail.com
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D: Gold plugin (tools/gold/*)
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N: Justin Bogner
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E: mail@justinbogner.com
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D: InstrProfiling and related parts of ProfileData
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N: Chandler Carruth
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E: chandlerc@gmail.com
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E: chandlerc@google.com
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D: Config, ADT, Support, inlining & related passes, SROA/mem2reg & related passes, CMake, library layering
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N: Evan Cheng
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E: evan.cheng@apple.com
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D: ARM target, parts of code generator not covered by someone else
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N: Eric Christopher
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E: echristo@gmail.com
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D: Debug Information, autotools/configure/make build, inline assembly
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N: Greg Clayton
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E: gclayton@apple.com
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D: LLDB
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N: Marshall Clow
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E: mclow.lists@gmail.com
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D: libc++
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N: Peter Collingbourne
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E: peter@pcc.me.uk
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D: llgo
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N: Anshuman Dasgupta
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E: adasgupt@codeaurora.org
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D: Hexagon Backend
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N: Duncan P. N. Exon Smith
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E: dexonsmith@apple.com
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D: Branch weights and BlockFrequencyInfo
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N: Hal Finkel
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E: hfinkel@anl.gov
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D: BBVectorize, the loop reroller, alias analysis and the PowerPC target
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N: Renato Golin
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E: renato.golin@linaro.org
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D: ARM Linux support
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N: Venkatraman Govindaraju
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E: venkatra@cs.wisc.edu
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D: Sparc Backend (lib/Target/Sparc/*)
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N: Tobias Grosser
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E: tobias@grosser.es
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D: Polly
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N: James Grosbach
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E: grosbach@apple.com
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D: MC layer
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N: Justin Holewinski
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E: jholewinski@nvidia.com
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D: NVPTX Target (lib/Target/NVPTX/*)
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N: Lang Hames
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E: lhames@gmail.com
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D: MCJIT, RuntimeDyld and JIT event listeners
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N: Galina Kistanova
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E: gkistanova@gmail.com
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D: LLVM Buildbot
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N: Anton Korobeynikov
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E: anton@korobeynikov.info
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D: Exception handling, Windows codegen, ARM EABI
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N: Benjamin Kramer
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E: benny.kra@gmail.com
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D: DWARF Parser
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N: Sergei Larin
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E: slarin@codeaurora.org
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D: VLIW Instruction Scheduling, Packetization
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N: Chris Lattner
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E: sabre@nondot.org
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W: http://nondot.org/~sabre/
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D: Everything not covered by someone else
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N: Tim Northover
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E: t.p.northover@gmail.com
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D: AArch64 backend
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N: Diego Novillo
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E: dnovillo@google.com
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D: SampleProfile and related parts of ProfileData
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N: Jakob Olesen
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E: stoklund@2pi.dk
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D: Register allocators and TableGen
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N: Richard Osborne
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E: richard@xmos.com
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D: XCore Backend
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N: Chad Rosier
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E: mcrosier@codeaurora.org
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D: Fast-Isel
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N: Nadav Rotem
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E: nrotem@apple.com
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D: X86 Backend, Loop Vectorizer
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N: Daniel Sanders
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E: daniel.sanders@imgtec.com
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D: MIPS Backend (lib/Target/Mips/*)
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N: Duncan Sands
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E: baldrick@free.fr
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D: DragonEgg
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N: Kostya Serebryany
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E: kcc@google.com
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D: AddressSanitizer, ThreadSanitizer (LLVM parts)
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N: Michael Spencer
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E: bigcheesegs@gmail.com
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D: Windows parts of Support, Object, ar, nm, objdump, ranlib, size
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N: Alexei Starovoitov
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E: alexei.starovoitov@gmail.com
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D: BPF backend
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N: Tom Stellard
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E: thomas.stellard@amd.com
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E: mesa-dev@lists.freedesktop.org
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D: Release manager for the 3.5 branch, R600 Backend, libclc
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N: Evgeniy Stepanov
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E: eugenis@google.com
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D: MemorySanitizer (LLVM part)
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N: Andrew Trick
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E: atrick@apple.com
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D: IndVar Simplify, Loop Strength Reduction, Instruction Scheduling
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N: Ulrich Weigand
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E: uweigand@de.ibm.com
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D: SystemZ Backend
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N: Bill Wendling
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E: isanbard@gmail.com
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D: libLTO, IR Linker
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N: Peter Zotov
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E: whitequark@whitequark.org
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D: OCaml bindings
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