re PR middle-end/46734 (ICE in create_tmp_var, at gimplify.c:505)

2010-12-09  Martin Jambor  <mjambor@suse.cz>

	PR middle-end/46734
	* tree-sra.c (splice_param_accesses): Check that there are not
	multiple ADDRESSABLE types.

	* testsuite/g++.dg/tree-ssa/pr46734.C: New test.

From-SVN: r167639

gcc/ChangeLog

+2010-12-09  Martin Jambor  <mjambor@suse.cz>
+
+	PR middle-end/46734
+	* tree-sra.c (splice_param_accesses): Check that there are not
+	multiple ADDRESSABLE types.
+
 2010-12-09  Joseph Myers  <joseph@codesourcery.com>
 
 	* config/arc/arc.h (ASM_SPEC): Remove %{v}.

gcc/testsuite/ChangeLog

+2010-12-09  Martin Jambor  <mjambor@suse.cz>
+
+	PR middle-end/46734
+	* g++.dg/tree-ssa/pr46734.C: New test.
+
 2010-12-09  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	PR c++/44641

gcc/testsuite/g++.dg/tree-ssa/pr46734.C

+/* { dg-do compile } */
+/* { dg-options "-O -fipa-sra" } */
+
+struct A
+{
+  int *p;
+  A() {p = (int *) -1;}
+  ~A() {if (p && p != (int *) -1) *p = 0;}
+};
+
+struct B
+{
+  A a;
+  char data[23];
+  B() : a() {data[0] = 0;}
+};
+
+extern A ga;
+extern int *gi;
+extern void *gz;
+extern B *gb;
+
+static int * __attribute__ ((noinline)) foo (B *b, void *z)
+{
+  __builtin_memcpy (gz, z, 28);
+  ga = b->a;
+  return b->a.p;
+}
+
+int *bar (B *b, void *z)
+{
+  gb = b;
+  return foo (b, z);
+}

gcc/tree-sra.c

@@ -3587,7 +3587,10 @@ splice_param_accesses (tree parm, bool *ro_grp)
 	  else if (ac2->size != access->size)
 	    return NULL;
 
-	  if (access_precludes_ipa_sra_p (ac2))
+	  if (access_precludes_ipa_sra_p (ac2)
+	      || (ac2->type != access->type
+		  && (TREE_ADDRESSABLE (ac2->type)
+		      || TREE_ADDRESSABLE (access->type))))
 	    return NULL;
 
 	  modification |= ac2->write;