loop-iv.c (simple_rhs_p): Allow more kinds of expressions.

* loop-iv.c (simple_rhs_p): Allow more kinds of expressions. From-SVN: r145355

loop-iv.c (simple_rhs_p): Allow more kinds of expressions.
* loop-iv.c (simple_rhs_p): Allow more kinds of expressions. From-SVN: r145355
b30321cd · Bernd Schmidt · Bernd Schmidt · 28af33b0 · b30321cd · b30321cd
Commit b30321cd authored Mar 31, 2009 by Bernd Schmidt Committed by Bernd Schmidt Mar 31, 2009
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gcc/ChangeLog
+2 -0

gcc/loop-iv.c
+6 -2

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -23,6 +23,8 @@
 	changed.  Use this when trying to improve the upper bound.
 	Generate the comparison by using simplify_gen_relational.

+	* loop-iv.c (simple_rhs_p): Allow more kinds of expressions.
+
 2009-03-31  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

        PR target/27237

--- a/gcc/loop-iv.c
+++ b/gcc/loop-iv.c
@@ -1336,9 +1336,10 @@ simple_rhs_p (rtx rhs)
    {
    case PLUS:
    case MINUS:
+    case AND:
      op0 = XEXP (rhs, 0);
      op1 = XEXP (rhs, 1);
-      /* Allow reg + const and reg + reg.  */
+      /* Allow reg OP const and reg OP reg.  */
      if (!(REG_P (op0) && !HARD_REGISTER_P (op0))
 	  && !CONSTANT_P (op0))
 	return false;
@@ -1349,9 +1350,12 @@ simple_rhs_p (rtx rhs)
      return true;

    case ASHIFT:
+    case ASHIFTRT:
+    case LSHIFTRT:
+    case MULT:
      op0 = XEXP (rhs, 0);
      op1 = XEXP (rhs, 1);
-      /* Allow reg << const.  */
+      /* Allow reg OP const.  */
      if (!(REG_P (op0) && !HARD_REGISTER_P (op0)))
 	return false;
      if (!CONSTANT_P (op1))