[gcc r12-7840] predcom: Fix up component::component [PR105056]

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:50f9148f7a8daf1fa1608cb23595c3cca191da0f

commit r12-7840-g50f9148f7a8daf1fa1608cb23595c3cca191da0f
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Mon Mar 28 09:51:28 2022 +0200

    predcom: Fix up component::component [PR105056]
    
    The recent change didn't initialize comp_step while previously we used
    XCNEW to allocate it.
    
    I think RS_ANY is better than RS_INTERNAL (== 0) as the default.
    
    2022-03-28  Jakub Jelinek  <jakub@redhat.com>
    
            PR tree-optimization/105056
            * tree-predcom.cc (component::component): Initialize also comp_step.

Diff:
---
 gcc/tree-predcom.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/tree-predcom.cc b/gcc/tree-predcom.cc
index e4aea7cdcb4..bb3a1cb68fc 100644
--- a/gcc/tree-predcom.cc
+++ b/gcc/tree-predcom.cc
@@ -367,7 +367,8 @@ enum ref_step_type
 
 struct component
 {
-  component (bool es) : eliminate_store_p (es), next (NULL) {}
+  component (bool es) : comp_step (RS_ANY), eliminate_store_p (es),
+    next (NULL) {}
 
   /* The references in the component.  */
   auto_vec<dref> refs;