Add a PR reference.

From-SVN: r182506

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 92be4a07fe41f4b8fca1076baf6e1eeaf2bb5961..feefdbc317d64b7005b5a63912bdf70b7fb32cfd 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,6 @@
 2011-12-19  Richard Sandiford  <rdsandiford@googlemail.com>
 
+       PR rtl-optimization/42839
        * fwprop.c (forward_propagate_subreg): Skip the SIGN/ZERO_EXTEND
        optimization if the source register is already extended.