------- 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
