re PR tree-optimization/36666 (ICE in process_constraint, at tree-ssa-structalias.c:2573)

2008-07-01  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/36666
	* tree-ssa-structalias.c (get_constraint_for_1): Declare.
	(get_constraint_exp_from_ssa_var): Split into ...
	(get_constraint_exp_for_temp): ... this ...
	(get_constraint_for_ssa_var): ... and that.
	Return constraint expressions for all touched sub-fields
	if the results address is not taken.
	(process_constraint): Remove assertion that aggregate
	assignments do not happen at this place.
	(get_constraint_for_component_ref): Add address_p argument.
	Return constraint expressions for all touched sub-fields
	if the results address is not taken.
	(do_deref): Use get_constraint_exp_for_temp.
	(get_constraint_for_1): Rename from ...
	(get_constraint_for): ... this.  Add the old function as
	wrapper.
	(do_structure_copy): Use get_constraint_for_1.

	* gcc.c-torture/compile/pr36666.c: New testcase.

From-SVN: r137315

gcc/ChangeLog

+2008-07-01  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/36666
+	* tree-ssa-structalias.c (get_constraint_for_1): Declare.
+	(get_constraint_exp_from_ssa_var): Split into ...
+	(get_constraint_exp_for_temp): ... this ...
+	(get_constraint_for_ssa_var): ... and that.
+	Return constraint expressions for all touched sub-fields
+	if the results address is not taken.
+	(process_constraint): Remove assertion that aggregate
+	assignments do not happen at this place.
+	(get_constraint_for_component_ref): Add address_p argument.
+	Return constraint expressions for all touched sub-fields
+	if the results address is not taken.
+	(do_deref): Use get_constraint_exp_for_temp.
+	(get_constraint_for_1): Rename from ...
+	(get_constraint_for): ... this.  Add the old function as
+	wrapper.
+	(do_structure_copy): Use get_constraint_for_1.
+
 2008-07-01  Martin Jambor  <mjambor@suse.cz>
+
         * Makefile.in (tree-switch-conversion.o): Add.
         (OBJS-common): Add tree-swtch-conversion.o.
         * passes.c (init_optimization_passes): Add pass_convert_switch.

gcc/testsuite/ChangeLog

+2008-07-01  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/36666
+	* gcc.c-torture/compile/pr36666.c: New testcase.
+
 2008-07-01  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/pack10.adb: New test.

gcc/testsuite/gcc.c-torture/compile/pr36666.c

+struct Foo {
+    int *p;
+    struct X {
+	int a,b,c,d,e,*f;
+    } x;
+} *init, *init2;
+
+struct X __attribute__((const)) foo(struct X);
+struct Foo __attribute__((const)) foo2(struct Foo);
+
+void bar1 (void)
+{
+  init->x = foo (init2->x);
+}
+void bar2 (void)
+{
+  init->x = foo (init->x);
+}
+void bar3 (void)
+{
+  *init = foo2 (*init2);
+}