PR c/30762

	* c-typeck.c (convert_for_assignment): Call comptypes for
	RECORD_TYPE or UNION_TYPE.

	* gcc.dg/pr30762-1.c: New test.
	* gcc.dg/pr30762-2.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@123073 138bc75d-0d04-0410-961f-82ee72b054a4

5 files changed, 40 insertions, 2 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dc56f6d6c9f..849ab904555 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2007-03-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c/30762
+	* c-typeck.c (convert_for_assignment): Call comptypes for
+	RECORD_TYPE or UNION_TYPE.
+
 	PR inline-asm/30505
 	* reload1.c (reload): Do invalid ASM checking after
 	cleanup_subreg_operands.
diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 6986405e8a9..5976cb26309 100644
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -3896,10 +3896,16 @@ convert_for_assignment (tree type, tree rhs, enum impl_conv errtype,
 	       || coder == BOOLEAN_TYPE))
     return convert_and_check (type, rhs);
 
+  /* Aggregates in different TUs might need conversion.  */
+  if ((codel == RECORD_TYPE || codel == UNION_TYPE)
+      && codel == coder
+      && comptypes (type, rhstype))
+    return convert_and_check (type, rhs);
+
   /* Conversion to a transparent union from its member types.
      This applies only to function arguments.  */
-  else if (codel == UNION_TYPE && TYPE_TRANSPARENT_UNION (type)
-	   && (errtype == ic_argpass || errtype == ic_argpass_nonproto))
+  if (codel == UNION_TYPE && TYPE_TRANSPARENT_UNION (type)
+      && (errtype == ic_argpass || errtype == ic_argpass_nonproto))
     {
       tree memb, marginal_memb = NULL_TREE;
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9a6607f2d11..0e772e49a86 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,9 @@
 2007-03-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c/30762
+	* gcc.dg/pr30762-1.c: New test.
+	* gcc.dg/pr30762-2.c: New test.
+
 	PR inline-asm/30505
 	* gcc.target/i386/pr30505.c: New test.
 
diff --git a/gcc/testsuite/gcc.dg/pr30762-1.c b/gcc/testsuite/gcc.dg/pr30762-1.c
new file mode 100644
index 00000000000..97dca8c020e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr30762-1.c
@@ -0,0 +1,15 @@
+/* PR c/30762 */
+/* { dg-do compile } */
+/* { dg-options "--combine -O3" } */
+/* { dg-additional-sources pr30762-2.c } */
+
+typedef struct { int i; } D;
+extern void foo (D);
+
+void
+bar (void)
+{
+  D d;
+  d.i = 1;
+  foo (d);
+}
diff --git a/gcc/testsuite/gcc.dg/pr30762-2.c b/gcc/testsuite/gcc.dg/pr30762-2.c
new file mode 100644
index 00000000000..7e914ebfa86
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr30762-2.c
@@ -0,0 +1,9 @@
+/* PR c/30762 */
+/* { dg-do compile } */
+
+typedef struct { int i; } D;
+
+void
+foo (D x)
+{
+}