* struct-equiv.c (rtx_equiv_p): Fix POST_MODIFY case.

From-SVN: r111929

1 files changed, 2 insertions, 6 deletions

diff --git a/gcc/struct-equiv.c b/gcc/struct-equiv.c
index 265cfd0fce8..e580b889f98 100644
--- a/gcc/struct-equiv.c
+++ b/gcc/struct-equiv.c
@@ -570,17 +570,13 @@ rtx_equiv_p (rtx *xp, rtx y, int rvalue, struct equiv_info *info)
 	  return false;
 	x_dest1 = XEXP (x, 0);
 	/* validate_change might have changed the destination.  Put it back
-	   so that we can do a valid source match.  */
+	   so that we can do a proper match for its role a an input.  */
 	XEXP (x, 0) = x_dest0;
-	if (!rtx_equiv_p (&XEXP (x, 1), XEXP (y, 1), 0, info))
+	if (!rtx_equiv_p (&XEXP (x, 0), XEXP (y, 0), 1, info))
 	  return false;
 	gcc_assert (x_dest1 == XEXP (x, 0));
 	/* Process source.  */
 	return rtx_equiv_p (&XEXP (x, 1), XEXP (y, 1), 1, info);
-      if (!rtx_equiv_p (&XEXP(x, 0), XEXP (y, 0), 0, info))
-	return false;
-      /* Process both subexpressions as inputs.  */
-      break;
       }
     case CLOBBER:
       gcc_assert (rvalue < 0);