Merge remote-tracking branch 'remotes/rth/tcg-next' into staging

* remotes/rth/tcg-next:
  tcg/optimize: Remember garbage high bits for 32-bit ops
  tcg/optimize: Move updating of gen_opc_buf into tcg_opt_gen_mov*
  tcg-sparc: Make debug_frame const
  tcg-s390: Make debug_frame const
  tcg-arm: Make debug_frame const
  tcg-aarch64: Make debug_frame const
  tcg-i386: Make debug_frame const
  tcg: Allow the debug_frame data structure to be constant
  tcg: Move size effects out of dh_arg
  tcg: Remove sizemask and flags arguments to tcg_gen_callN
  tcg: Save flags and computed sizemask in TCGHelperInfo
  tcg: Register the helper info struct rather than the name
  tcg: Move side effects out of dh_sizemask
  tcg: Inline tcg_gen_helperN
  tcg: Use helper-gen.h in tcg-op.h
  tcg: Push tcg-runtime routines into exec/helper-*
  tcg: Invert the inclusion of helper.h
  tcg: Optimize brcond2 and setcond2 ne/eq

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>