File gcc41-pr29091.patch of Package gcc

2006-10-04  Jakub Jelinek  <jakub@redhat.com>

	PR c/29091
	* varasm.c (output_constant): If TREE_VECTOR_CST_ELTS chain is shorter than
	the number of vector elements fill the rest with zeros.

	* gcc.dg/pr29091.c: New test.

--- gcc/varasm.c.jj	2006-09-22 10:29:56.000000000 +0200
+++ gcc/varasm.c	2006-10-04 17:52:27.000000000 +0200
@@ -4128,8 +4128,12 @@ output_constant (tree exp, unsigned HOST
 
 	    link = TREE_VECTOR_CST_ELTS (exp);
 	    output_constant (TREE_VALUE (link), elt_size, align);
+	    thissize = elt_size;
 	    while ((link = TREE_CHAIN (link)) != NULL)
-	      output_constant (TREE_VALUE (link), elt_size, nalign);
+	      {
+		output_constant (TREE_VALUE (link), elt_size, nalign);
+		thissize += elt_size;
+	      }
 	    break;
 	  }
 	default:
--- gcc/testsuite/gcc.dg/pr29091.c.jj	2006-10-04 18:02:09.000000000 +0200
+++ gcc/testsuite/gcc.dg/pr29091.c	2006-10-04 18:05:33.000000000 +0200
@@ -0,0 +1,44 @@
+/* PR c/29091 */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+__attribute__ ((vector_size (sizeof (int) * 4))) int a = { 1, 2 };
+int d = 3;
+__attribute__ ((vector_size (sizeof (int) * 4))) int b = { 4, 5, 6 };
+int e = 7;
+__attribute__ ((vector_size (sizeof (int) * 4))) int c = { };
+
+int
+main (void)
+{
+  int *p = (int *) &a;
+  if (p[0] != 1)
+    abort ();
+  if (p[1] != 2)
+    abort ();
+  if (p[2] != 0)
+    abort ();
+  if (p[3] != 0)
+    abort ();
+  p = (int *) &b;
+  if (p[0] != 4)
+    abort ();
+  if (p[1] != 5)
+    abort ();
+  if (p[2] != 6)
+    abort ();
+  if (p[3] != 0)
+    abort ();
+  p = (int *) &c;
+  if (p[0] != 0)
+    abort ();
+  if (p[1] != 0)
+    abort ();
+  if (p[2] != 0)
+    abort ();
+  if (p[3] != 0)
+    abort ();
+  return 0;
+}