[PATCH] D67980: [BPF] do compile-once run-everywhere relocation for bitfields

[Yonghong Song via Phabricator via cfe-commits]

yonghong-song updated this revision to Diff 223792.
yonghong-song edited the summary of this revision.
yonghong-song added a comment.

use only one relocation for left shift to optimize for direct load. The bpf_probe_read() big endian mode could have 4 more arithmetic instructions compared to little endian mode. The performance impact should be negligible comparing to bpf_probe_read() itself.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D67980/new/

https://reviews.llvm.org/D67980

Files:
  clang/include/clang/Basic/BuiltinsBPF.def
  clang/include/clang/Basic/DiagnosticSemaKinds.td
  clang/include/clang/Basic/TargetBuiltins.h
  clang/include/clang/Sema/Sema.h
  clang/include/clang/module.modulemap
  clang/lib/Basic/Targets/BPF.cpp
  clang/lib/Basic/Targets/BPF.h
  clang/lib/CodeGen/CGBuiltin.cpp
  clang/lib/CodeGen/CGExpr.cpp
  clang/lib/CodeGen/CodeGenFunction.h
  clang/lib/Sema/SemaChecking.cpp
  clang/test/CodeGen/builtins-bpf-preserve-field-info-1.c
  clang/test/CodeGen/builtins-bpf-preserve-field-info-2.c
  clang/test/Sema/builtins-bpf.c
  llvm/include/llvm/IR/IntrinsicsBPF.td
  llvm/lib/Target/BPF/BPF.h
  llvm/lib/Target/BPF/BPFAbstractMemberAccess.cpp
  llvm/lib/Target/BPF/BPFCORE.h
  llvm/lib/Target/BPF/BPFTargetMachine.cpp
  llvm/lib/Target/BPF/BTF.h
  llvm/lib/Target/BPF/BTFDebug.cpp
  llvm/lib/Target/BPF/BTFDebug.h
  llvm/test/CodeGen/BPF/CORE/intrinsic-array.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-byte-size-1.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-byte-size-2.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-byte-size-3.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-existence-1.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-existence-2.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-existence-3.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-lshift-1.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-lshift-2.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-rshift-1.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-rshift-2.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-rshift-3.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-signedness-1.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-signedness-2.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-fieldinfo-signedness-3.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-struct.ll
  llvm/test/CodeGen/BPF/CORE/intrinsic-union.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-access-str.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-basic.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-cast-array-1.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-cast-array-2.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-cast-struct-1.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-cast-struct-2.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-cast-struct-3.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-cast-union-1.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-cast-union-2.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-end-load.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-end-ret.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-fieldinfo-1.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-fieldinfo-2.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-global-1.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-global-2.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-global-3.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-ignore.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-middle-chain.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-multi-array-1.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-multi-array-2.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-multilevel.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-pointer-1.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-pointer-2.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-struct-anonymous.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-struct-array.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-typedef-array.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-typedef-struct.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-typedef-union.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-typedef.ll
  llvm/test/CodeGen/BPF/CORE/offset-reloc-union.ll

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