[Bug tree-optimization/79315] [7 Regression] ICE while building SPEC CPU 2006 FP with -Ofast -ftree-parallelize-loops

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79315

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Will test

Index: gcc/tree-cfg.c
===================================================================
--- gcc/tree-cfg.c      (revision 245064)
+++ gcc/tree-cfg.c      (working copy)
@@ -6636,11 +6636,12 @@ move_stmt_op (tree *tp, int *walk_subtre
   if (EXPR_P (t))
     {
       tree block = TREE_BLOCK (t);
-      if (block == p->orig_block
-         || (p->orig_block == NULL_TREE
-             && block != NULL_TREE))
+      if (block == NULL_TREE)
+       ;
+      else if (block == p->orig_block
+              || p->orig_block == NULL_TREE)
        TREE_SET_BLOCK (t, p->new_block);
-      else if (flag_checking && block != NULL_TREE)
+      else if (flag_checking)
        {
          while (block && TREE_CODE (block) == BLOCK && block != p->orig_block)
            block = BLOCK_SUPERCONTEXT (block);