diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ebe2b7d7a296aff6bf31c17cbec58ae0e8d3c79b..983ad2ce792f3da86ba771b690d255cec5dc04ba 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2004-12-31  Richard Henderson  <rth@redhat.com>
+
+	PR tree-opt/19042
+	* tree-sra.c (decide_block_copy): Force use_block_copy false
+	for complex values.
+
 2004-12-31  Richard Henderson  <rth@redhat.com>
 
 	PR middle-end/17799
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c
index 1c1739b18b21ada95899abccf499152ec8bcb210..bb98a8afe6cff094951b13c348d264709a83e164 100644
--- a/gcc/tree-sra.c
+++ b/gcc/tree-sra.c
@@ -1293,10 +1293,15 @@ decide_block_copy (struct sra_elt *elt)
       tree size_tree = TYPE_SIZE_UNIT (elt->type);
       bool use_block_copy = true;
 
+      /* Tradeoffs for COMPLEX types pretty much always make it better
+	 to go ahead and split the components.  */
+      if (TREE_CODE (elt->type) == COMPLEX_TYPE)
+	use_block_copy = false;
+
       /* Don't bother trying to figure out the rest if the structure is
 	 so large we can't do easy arithmetic.  This also forces block
 	 copies for variable sized structures.  */
-      if (host_integerp (size_tree, 1))
+      else if (host_integerp (size_tree, 1))
 	{
 	  unsigned HOST_WIDE_INT full_size, inst_size = 0;
 	  unsigned int inst_count;