From: paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 31 Oct 2012 19:14:39 +0000 (+0000)
Subject: /cp
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=df18edc85419592f43453deaa40011d74a5b9003;p=thirdparty%2Fgcc.git

/cp
2012-10-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54583
	* tree.c (build_cplus_array_type): Set TREE_NO_WARNING on the
	TYPE_SIZE of VLAs.

/testsuite
2012-10-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54583
	* g++.dg/ext/vla13.C: New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@193043 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index a1abdde3f3d6..70d001cbb5e4 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2012-10-31  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/54583
+	* tree.c (build_cplus_array_type): Set TREE_NO_WARNING on the
+	TYPE_SIZE of VLAs.
+
 2012-10-31  Dodji Seketeli  <dodji@redhat.com>
 
 	PR c++/54955
diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c
index 8d555c2e2b1c..bcc2779f5447 100644
--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -824,6 +824,10 @@ build_cplus_array_type (tree elt_type, tree index_type)
 	}
     }
 
+  /* Avoid spurious warnings with VLAs (c++/54583).  */
+  if (TYPE_SIZE (t) && EXPR_P (TYPE_SIZE (t)))
+    TREE_NO_WARNING (TYPE_SIZE (t)) = 1;
+
   /* Push these needs up so that initialization takes place
      more easily.  */
   TYPE_NEEDS_CONSTRUCTING (t)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9bc92dfaf1e0..b32d9f79a577 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2012-10-31  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/54583
+	* g++.dg/ext/vla13.C: New.
+
 2012-10-31  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR middle-end/55150
diff --git a/gcc/testsuite/g++.dg/ext/vla13.C b/gcc/testsuite/g++.dg/ext/vla13.C
new file mode 100644
index 000000000000..719c35b16b18
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/vla13.C
@@ -0,0 +1,8 @@
+// PR c++/54583
+// { dg-options "-Wunused-value" }
+
+void fred()
+{
+  int n=10;
+  double (*x)[n];
+}