[Bug tree-optimization/22415] [4.0 Regression] ICE in coalesce_abnormal_edges

[law at redhat dot com]

------- Comment #8 from law at redhat dot com  2006-01-12 20:41 -------
Subject: Re:  [4.0 Regression] ICE in
        coalesce_abnormal_edges

On Thu, 2006-01-12 at 20:30 +0000, law at redhat dot com wrote:

> You should assign this bug to Daniel since he's the PRE expert.
I'll note that something like this seems to avoid the problem, but I
have no idea if it's correct.  It may (or may not) help Daniel in
tracking this down.

At this point I'm leaving this for Daniel to resolve since he's 
way more familiar with this code than I will ever be.



Index: tree-ssa-pre.c
===================================================================
*** tree-ssa-pre.c      (revision 109644)
--- tree-ssa-pre.c      (working copy)
*************** compute_avail (void)
*** 1903,1909 ****
        for (phi = phi_nodes (block); phi; phi = PHI_CHAIN (phi))
        /* We have no need for virtual phis, as they don't represent
           actual computations.  */
!       if (is_gimple_reg (PHI_RESULT (phi)))
          add_to_sets (PHI_RESULT (phi), PHI_RESULT (phi), NULL,
                       PHI_GEN (block), AVAIL_OUT (block));

--- 1903,1910 ----
        for (phi = phi_nodes (block); phi; phi = PHI_CHAIN (phi))
        /* We have no need for virtual phis, as they don't represent
           actual computations.  */
!       if (is_gimple_reg (PHI_RESULT (phi))
!           && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (PHI_RESULT (phi)))
          add_to_sets (PHI_RESULT (phi), PHI_RESULT (phi), NULL,
                       PHI_GEN (block), AVAIL_OUT (block));


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22415