PR rtl-optimization/25514

	* combine.c (replaced_rhs_insn): New variable.
	(combine_instructions): Set replaced_rhs_insn when trying to replace
	a SET_SRC with a REG_EQUAL note.
	(distribute_notes): Use replaced_rhs_insn when determining the live
	range of a REG_DEAD register.

gcc/testsute
	* gcc.c-torture/compile/pr25514.c: New test.


git-svn-id: https://gcc.gnu.org/svn/gcc/branches/csl/coldfire-4_1@113313 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 24 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/compile/pr25514.c b/gcc/testsuite/gcc.c-torture/compile/pr25514.c
new file mode 100644
index 00000000000..0bf5aa9077d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr25514.c
@@ -0,0 +1,24 @@
+struct node {
+  struct node *next;
+  int value;
+};
+
+struct node *current_node, global_list;
+
+void
+bar (void)
+{
+  struct node *node, *next;
+
+  node = current_node;
+  next = node->next;
+  if (node != &global_list)
+    current_node = next;
+  else
+    {
+      node = global_list.next;
+      global_list.value = node->value;
+      global_list.next = node->next;
+    }
+  foo (node);
+}