[PATCH] Initialise temporary recog_data.insns [PR127330]

[Richard Sandiford]

When installing a temporary recog_data, we need to zero-initialise
the insn field to indicate that none of the other contents are valid.

Bootstrap & regression test still in progress for x86_64-linux-gnu,
but it does fix the valgrind issue.  OK to install if testing passes?

Richard


gcc/
        PR middle-end/127330
        * recog.h (recog_state_saver::recog_state_saver): Initialize
        m_tmp_recog_data.insn
---
 gcc/recog.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/recog.h b/gcc/recog.h
index 4d94fc26d94..70fa58910ca 100644
--- a/gcc/recog.h
+++ b/gcc/recog.h
@@ -468,6 +468,7 @@ inline recog_state_saver::recog_state_saver ()
   : saved_recog_data_ptr (recog_data_ptr),
     saved_alternative (which_alternative)
 {
+  m_tmp_recog_data.insn = nullptr;
   recog_data_ptr = &m_tmp_recog_data;
 }
 
-- 
2.55.0