[Bug rtl-optimization/66891] [6 Regression] ICE in expand_call, at calls.c:3407

["ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66891

UroÅ Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |ubizjak at gmail dot com

--- Comment #2 from UroÅ Bizjak <ubizjak at gmail dot com> ---
Fun with global variables ...

Patch in testing:

--cut here--
Index: calls.c
===================================================================
--- calls.c     (revision 225857)
+++ calls.c     (working copy)
@@ -3144,6 +3144,10 @@ expand_call (tree exp, rtx target, int ignore)

       compute_argument_addresses (args, argblock, num_actuals);

+      /* Stack is properly aligned, pops can't safely be deferred during
+        the evaluation of the arguments.  */
+      NO_DEFER_POP;
+
       /* Precompute all register parameters.  It isn't safe to compute
         anything once we have started filling any specific hard regs.
         TLS symbols sometimes need a call to resolve.  Precompute
@@ -3151,6 +3155,8 @@ expand_call (tree exp, rtx target, int ignore)
         to avoid unaligned stack in the called function.  */
       precompute_register_parameters (num_actuals, args, &reg_parm_seen);

+      OK_DEFER_POP;
+
       /* Perform stack alignment before the first push (the last arg).  */
       if (argblock == 0
           && adjusted_args_size.constant > reg_parm_stack_space
--cut here--