[PATCH] D145791: [MC] Always encode instruction into SmallVector

[Alexis Engelke via Phabricator via llvm-commits]

aengelke created this revision.
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All users of MCCodeEmitter::encodeInstruction use a raw_svector_ostream
to encode the instruction into a SmallVector. The raw_ostream however
incurs some overhead for the actual encoding.

This change allows an MCCodeEmitter to directly emit an instruction into
a SmallVector without using a raw_ostream and therefore allow for
performance improvments in encoding. A default path that uses existing
raw_ostream implementations is provided.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D145791

Files:
  llvm/include/llvm/MC/MCCodeEmitter.h
  llvm/include/llvm/MCA/CodeEmitter.h
  llvm/lib/MC/MCAsmStreamer.cpp
  llvm/lib/MC/MCAssembler.cpp
  llvm/lib/MC/MCCodeEmitter.cpp
  llvm/lib/MC/MCELFStreamer.cpp
  llvm/lib/MC/MCMachOStreamer.cpp
  llvm/lib/MC/MCObjectStreamer.cpp
  llvm/lib/MC/MCSPIRVStreamer.cpp
  llvm/lib/MC/MCWasmStreamer.cpp
  llvm/lib/MC/MCWinCOFFStreamer.cpp
  llvm/lib/MC/MCXCOFFStreamer.cpp
  llvm/lib/MCA/CodeEmitter.cpp
  llvm/lib/Target/AMDGPU/AMDGPUMCInstLower.cpp
  llvm/lib/Target/Hexagon/MCTargetDesc/HexagonAsmBackend.cpp
  llvm/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
  llvm/lib/Target/X86/X86MCInstLower.cpp
  llvm/tools/llvm-exegesis/lib/LlvmState.cpp

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