re PR tree-optimization/40759 (segfault in useless_type_conversion_p)

	PR tree-optimization/40759
	* tree-ssa-dce.c (mark_virtual_phi_result_for_renaming): Mark all uses
	for renaming.

From-SVN: r150168

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a20aed1230e14d6629b1cdbaf6209e3885801e89..fc6cf1d3828c8240f1bda3b2053417c780b7d83e 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-07-28  Jan Hubicka  <jh@suse.cz>
+
+       PR tree-optimization/40759
+       * tree-ssa-dce.c (mark_virtual_phi_result_for_renaming): Mark all uses
+       for renaming.
+
 2009-07-27  DJ Delorie  <dj@redhat.com>
 
        * config/mep/mep.c (mep_expand_builtin_saveregs): Make sure 64-bit

diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c
index bbf37f7a02855dd046f4335935052915e3ca68e9..c1f4e7f647b41b5eaeae007f6a2aab6fa852b8f2 100644 (file)
--- a/gcc/tree-ssa-dce.c
+++ b/gcc/tree-ssa-dce.c
@@ -828,9 +828,6 @@ mark_virtual_phi_result_for_renaming (gimple phi)
     }
   FOR_EACH_IMM_USE_STMT (stmt, iter, gimple_phi_result (phi))
     {
-      if (gimple_code (stmt) != GIMPLE_PHI
-         && !gimple_plf (stmt, STMT_NECESSARY))
-        continue;
       FOR_EACH_IMM_USE_ON_STMT (use_p, iter)
         SET_USE (use_p, SSA_NAME_VAR (gimple_phi_result (phi)));
       update_stmt (stmt);