(try_combine): When splitting an insn, check for the new I2 setting a

SUBREG.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@13286 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/combine.c b/gcc/combine.c
index 683765f..472767a 100644 (file)
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -1845,10 +1845,15 @@ try_combine (i3, i2, i1)
                     || GET_CODE (new_i3_dest) == SUBREG)
                new_i3_dest = XEXP (new_i3_dest, 0);
 
+             while (GET_CODE (new_i2_dest) == ZERO_EXTRACT
+                    || GET_CODE (new_i2_dest) == STRICT_LOW_PART
+                    || GET_CODE (new_i2_dest) == SUBREG)
+               new_i2_dest = XEXP (new_i2_dest, 0);
+
              if (GET_CODE (new_i3_dest) == REG
                  && GET_CODE (new_i2_dest) == REG
                  && REGNO (new_i3_dest) == REGNO (new_i2_dest))
-               reg_n_sets[REGNO (SET_DEST (i2set))]++;
+               reg_n_sets[REGNO (new_i2_dest)]++;
            }
        }