[Bug tree-optimization/99220] [11 Regression] ICE during vectorization when multiple instances do the same calculation but have different num lanes

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99220

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 50245
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50245&action=edit
patch

So sth like

diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index 091e727bbc3..24962af903f 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -2351,6 +2351,11 @@ next:
        {
          SLP_TREE_REF_COUNT (value)++;
          SLP_TREE_CHILDREN (root)[i] = value;
+         /* ???  We know the original leafs of the replaced nodes will
+            be referenced by bst_map, only the permutes created by
+            pattern matching are not.  */
+         if (SLP_TREE_REF_COUNT (node) == 1)
+           load_map->remove (node);
          vect_free_slp_tree (node);
        }
     }

fixes the testcase but not caching load_map across pattern matching
will make reasoning this fix is complete easier.

Thus I am testing the attached on x86_64-linux, can you test on arm and report
back?