[Bug target/127330] [17 Regression] valgrind "Conditional jump or move depends on uninitialised value(s)" in extract_insn_cached(rtx_insn*) (recog.cc:2782)

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127330

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> r17-4078-gb1215a5b1e6948 last touched ix86_memory_address_reg_class ...

recog_data.insn is read and appears uninitialized after

  /* Try to recognize the insn before calling get_attr_addr.
     Save current recog_data and current alternative.  */
  recog_state_saver recog_save;

meaning

  recog_data_d m_tmp_recog_data;

isn't initialized by the CTOR which is

  recog_data_d () = default;