PR c/67581

	* g++.dg/torture/pr67581.C: New testcase.
	* c-family/c-common.c (handle_transparent_union_attribute): Update
	also type variants.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231048 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog
index ad0fbc1c73559485f4608cc49fc91866d371393c..f8fa0b2b376aeed7e50d8e03cb83005fad2f21bb 100644 (file)
--- a/gcc/c-family/ChangeLog
+++ b/gcc/c-family/ChangeLog
@@ -1,3 +1,9 @@
+2015-11-29  Jan Hubicka  <hubicka@ucw.cz>
+
+       PR c/67581
+       * c-common.c (handle_transparent_union_attribute): Update
+       also type variants.
+
 2015-11-27  Martin Liska  <mliska@suse.cz>
 
        PR c++/68312

diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index fe0a235988fe88a0e9020724b5b1f60df19945f7..369574f44de697220bb91cf0d4a0a82431a117fd 100644 (file)
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -7787,7 +7787,8 @@ handle_transparent_union_attribute (tree *node, tree name,
          *node = type = build_duplicate_type (type);
        }
 
-      TYPE_TRANSPARENT_AGGR (type) = 1;
+      for (tree t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
+        TYPE_TRANSPARENT_AGGR (t) = 1;
       return NULL_TREE;
     }
 

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d58666e1bf9bbc3b9c19c386a64460b067213a54..a4419b8acb45d75f6bfbd02591df2b860347b8a8 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-29  Jan Hubicka  <hubicka@ucw.cz>
+
+       PR c/67581
+       * g++.dg/torture/pr67581.C: New testcase.
+
 2015-11-27  Richard Biener  <rguenther@suse.de>
 
        PR tree-optimization/68559

diff --git a/gcc/testsuite/g++.dg/torture/pr67581.C b/gcc/testsuite/g++.dg/torture/pr67581.C
new file mode 100644 (file)
index 0000000..8089c1f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr67581.C
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+union U 
+{
+  int x; 
+  float y;
+} __attribute__ ((__transparent_union__));