recog.c (split_insn): Copy the original SET_SRC before using it as a note.

gcc/
	* recog.c (split_insn): Copy the original SET_SRC before using
	it as a note.

From-SVN: r190102

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index edecc9728f521fdd5853465a3791b3e2e8b7326a..524ae209da8f867a4d70ea0748fdbcc9bda79419 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-08-02  Richard Sandiford  <rdsandiford@googlemail.com>
+
+       * recog.c (split_insn): Copy the original SET_SRC before using
+       it as a note.
+
 2012-08-02  Richard Sandiford  <rdsandiford@googlemail.com>
 
        * reorg.c (dbr_schedule): Delete REG_BR_PRED loop.

diff --git a/gcc/recog.c b/gcc/recog.c
index a05e8c608f7cd59c01e7ef0f5bbfaee77e4d4069..d7381abd579a6e2affad83f1aa306719addf9e15 100644 (file)
--- a/gcc/recog.c
+++ b/gcc/recog.c
@@ -2831,7 +2831,8 @@ split_insn (rtx insn)
          if (note && CONSTANT_P (XEXP (note, 0)))
            set_unique_reg_note (last, REG_EQUAL, XEXP (note, 0));
          else if (CONSTANT_P (SET_SRC (insn_set)))
-           set_unique_reg_note (last, REG_EQUAL, SET_SRC (insn_set));
+           set_unique_reg_note (last, REG_EQUAL,
+                                copy_rtx (SET_SRC (insn_set)));
        }
     }