re PR tree-optimization/39829 (ICE with some code that produces VCE)

2009-04-21  Richard Guenther  <rguenther@suse.de>

	PR middle-end/39829
	* gimple.c (walk_stmt_load_store_addr_ops): Catch addresses
	inside VIEW_CONVERT_EXPRs.

	* gcc.dg/torture/pr39829.c: New testcase.

From-SVN: r146521

gcc/ChangeLog

+2009-04-21  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/39829
+	* gimple.c (walk_stmt_load_store_addr_ops): Catch addresses
+	inside VIEW_CONVERT_EXPRs.
+
 2009-04-21  Martin Jambor  <mjambor@suse.cz>
 
 	* tree-switch-conversion.c (build_constructors): Split a long line.

gcc/gimple.c

@@ -3231,6 +3231,8 @@ walk_stmt_load_store_addr_ops (gimple stmt, void *data,
 	    ret |= visit_store (stmt, lhs, data);
 	}
       rhs = gimple_assign_rhs1 (stmt);
+      while (handled_component_p (rhs))
+	rhs = TREE_OPERAND (rhs, 0);
       if (visit_addr)
 	{
 	  if (TREE_CODE (rhs) == ADDR_EXPR)

gcc/testsuite/ChangeLog

+2009-04-21  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/39829
+	* gcc.dg/torture/pr39829.c: New testcase.
+
 2009-04-21  Martin Jambor  <mjambor@suse.cz>
 
 	* gcc.dg/tree-ssa/cswtch-2.c: New test.

gcc/testsuite/gcc.dg/torture/pr39829.c

+/* { dg-do compile } */
+/* { dg-options "-w" } */
+
+void foo (void * DAG_temp117584)
+{
+  char  uA;
+  void* pA;
+  void* pB;
+  void* pC;
+  do {
+      int DAG_temp117585;
+      int DAG_temp117586;
+      void ** __indir_union1 = (void**)DAG_temp117584;
+      DAG_temp117585 = (long)*__indir_union1;
+      DAG_temp117586 = DAG_temp117585;
+      if ( DAG_temp117586 != (int)268435456 )
+	pA = (void*)&uA;
+      pB = (void*)&pA;
+      pC = pB;
+      union __block_indir0_u {  struct {  long val; }  __indir_struct; }
+      * __indir_union = (union __block_indir0_u*)pC;
+      f(__indir_union->__indir_struct.val);
+
+      DAG_temp117584 += 64;
+  } while (1);
+}
+