From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 3 Mar 2009 11:29:51 +0000 (+0000)
Subject: 	PR tree-optimization/39343
X-Git-Tag: upstream/4.9.2~37612
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bc79a76b630400ddbd6dd00aab74914e58349eb3;p=platform%2Fupstream%2Flinaro-gcc.git

	PR tree-optimization/39343
	* tree-ssa-ccp.c (maybe_fold_offset_to_address): Don't check if
	COMPONENT_REF t has ARRAY_TYPE.

	* gcc.dg/pr39343.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@144571 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 998ef44..72da01f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-03-03  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/39343
+	* tree-ssa-ccp.c (maybe_fold_offset_to_address): Don't check if
+	COMPONENT_REF t has ARRAY_TYPE.
+
 2009-03-02  Sebastian Pop  <sebastian.pop@amd.com>
 
 	PR middle-end/39335
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5d5b967..3bb4d97 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2009-03-03  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/39343
+	* gcc.dg/pr39343.c: New test.
+
 2009-03-03  Ira Rosen  <irar@il.ibm.com>
 
 	PR tree-optimization/39248
diff --git a/gcc/testsuite/gcc.dg/pr39343.c b/gcc/testsuite/gcc.dg/pr39343.c
new file mode 100644
index 0000000..70df59e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr39343.c
@@ -0,0 +1,29 @@
+/* PR tree-optimization/39343 */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+extern inline __attribute__ ((__always_inline__)) int
+foo (char *dest)
+{
+  return __builtin_object_size (dest, 1);
+}
+
+struct S
+{
+  union
+  {
+    struct { int a, b; char c, d; } f;
+    struct { struct { int a, b; char c, d[255]; } e; } g;
+  } u;
+};
+
+int
+main (void)
+{
+  struct S s;
+  if (foo (s.u.g.e.d) != 255)
+    abort ();
+  return 0;
+}
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c
index d602726..5080cc3 100644
--- a/gcc/tree-ssa-ccp.c
+++ b/gcc/tree-ssa-ccp.c
@@ -1942,8 +1942,7 @@ maybe_fold_offset_to_address (tree addr, tree offset, tree orig_type)
 	   || (TREE_CODE (orig) == COMPONENT_REF
 	       && TREE_CODE (TREE_TYPE (TREE_OPERAND (orig, 1))) == ARRAY_TYPE))
 	  && (TREE_CODE (t) == ARRAY_REF
-	      || (TREE_CODE (t) == COMPONENT_REF
-		  && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 1))) == ARRAY_TYPE))
+	      || TREE_CODE (t) == COMPONENT_REF)
 	  && !operand_equal_p (TREE_CODE (orig) == ARRAY_REF
 			       ? TREE_OPERAND (orig, 0) : orig,
 			       TREE_CODE (t) == ARRAY_REF