From: Volker Reichelt <v.reichelt@netcologne.de>
Date: Sun, 30 Mar 2008 21:58:43 +0000 (+0000)
Subject: re PR c/35748 (ICE with cast to invalid union)
X-Git-Tag: releases/gcc-4.4.0~5758
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=39ffbac9119e258b475386c959ff50af31a270b4;p=thirdparty%2Fgcc.git

re PR c/35748 (ICE with cast to invalid union)

	PR c/35748
	* c-typeck.c (build_c_cast): Skip invalid fields in unions.

	* gcc.dg/union-cast-4.c: New test.

From-SVN: r133737
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a0e29ccedb18..d278b6c555f9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2008-03-30  Volker Reichelt  <v.reichelt@netcologne.de>
+
+	PR c/35748
+	* c-typeck.c (build_c_cast): Skip invalid fields in unions.
+
 2008-03-30  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/35757
diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 4d476c5d4dd5..a457f6a22835 100644
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -3628,8 +3628,9 @@ build_c_cast (tree type, tree expr)
       tree field;
 
       for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
-	if (comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (field)),
-		       TYPE_MAIN_VARIANT (TREE_TYPE (value))))
+	if (TREE_TYPE (field) != error_mark_node
+	    && comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (field)),
+			  TYPE_MAIN_VARIANT (TREE_TYPE (value))))
 	  break;
 
       if (field)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3f8205a65fb2..e7e4b30824bb 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2008-03-30  Volker Reichelt  <v.reichelt@netcologne.de>
+
+	PR c/35748
+	* gcc.dg/union-cast-4.c: New test.
+
 2008-03-30  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/35757
diff --git a/gcc/testsuite/gcc.dg/union-cast-4.c b/gcc/testsuite/gcc.dg/union-cast-4.c
new file mode 100644
index 000000000000..a1c98ba14acc
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/union-cast-4.c
@@ -0,0 +1,8 @@
+/* PR c/35748 */
+
+union U { void x[1]; }; /* { dg-error "array of voids" } */
+
+void foo()
+{
+  (union U)0; /* { dg-error "type not present" } */
+}