re PR target/38123 (error: incorrect sharing of tree nodes ap->fp_offset = D.2748;)

	PR target/38123
	* config/i386/i386.c (ix86_gimplify_va_arg): Don't share valist between
	gpr and other COMPONENT_REFs.

	* gcc.c-torture/compile/pr38123.c: New test.

From-SVN: r141889

gcc/ChangeLog

+2008-11-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/38123
+	* config/i386/i386.c (ix86_gimplify_va_arg): Don't share valist between
+	gpr and other COMPONENT_REFs.
+
 2008-11-15  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/38051

gcc/config/i386/i386.c

@@ -6579,8 +6579,9 @@ ix86_gimplify_va_arg (tree valist, tree type, gimple_seq *pre_p,
   f_ovf = TREE_CHAIN (f_fpr);
   f_sav = TREE_CHAIN (f_ovf);
 
+  gpr = build3 (COMPONENT_REF, TREE_TYPE (f_gpr),
+		build_va_arg_indirect_ref (valist), f_gpr, NULL_TREE);
   valist = build_va_arg_indirect_ref (valist);
-  gpr = build3 (COMPONENT_REF, TREE_TYPE (f_gpr), valist, f_gpr, NULL_TREE);
   fpr = build3 (COMPONENT_REF, TREE_TYPE (f_fpr), valist, f_fpr, NULL_TREE);
   ovf = build3 (COMPONENT_REF, TREE_TYPE (f_ovf), valist, f_ovf, NULL_TREE);
   sav = build3 (COMPONENT_REF, TREE_TYPE (f_sav), valist, f_sav, NULL_TREE);

gcc/testsuite/ChangeLog

+2008-11-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/38123
+	* gcc.c-torture/compile/pr38123.c: New test.
+
 2008-11-15  Richard Guenther  <rguenther@suse.de>
-	Jakub Jelinek  <jakub@redhat.com>
+	    Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/38051
 	* gcc.c-torture/execute/pr38051.c: New testcase.

gcc/testsuite/gcc.c-torture/compile/pr38123.c

+/* PR target/38123 */
+
+#include <stdarg.h>
+
+struct S { int i; double d; };
+
+struct S
+test (char *x, va_list ap)
+{
+  struct S s;
+  s = va_arg (ap, struct S);
+  return s;
+}