rtlanal.c (reg_overlap_mentioned_p): Handle ZERO_EXTRACT and SIGN_EXTRACT.

* rtlanal.c (reg_overlap_mentioned_p): Handle ZERO_EXTRACT and SIGN_EXTRACT. From-SVN: r65782

rtlanal.c (reg_overlap_mentioned_p): Handle ZERO_EXTRACT and SIGN_EXTRACT.
* rtlanal.c (reg_overlap_mentioned_p): Handle ZERO_EXTRACT and SIGN_EXTRACT. From-SVN: r65782
c553b702 · Roger Sayle · Roger Sayle · e9b84181 · c553b702 · c553b702
Commit c553b702 authored Apr 18, 2003 by Roger Sayle Committed by Roger Sayle Apr 18, 2003
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gcc/rtlanal.c
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2003-04-18  Roger Sayle  <roger@eyesopen.com>
+
+	* rtlanal.c (reg_overlap_mentioned_p): Handle ZERO_EXTRACT
+	and SIGN_EXTRACT.
+
 2003-04-18  Eric Botcazou  <ebotcazou@libertysurf.fr>

 	PR optimization/7675

--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -1573,7 +1573,9 @@ reg_overlap_mentioned_p (x, in)
  unsigned int regno, endregno;

  /* Overly conservative.  */
-  if (GET_CODE (x) == STRICT_LOW_PART)
+  if (GET_CODE (x) == STRICT_LOW_PART
+      || GET_CODE (x) == ZERO_EXTRACT
+      || GET_CODE (x) == SIGN_EXTRACT)
    x = XEXP (x, 0);

  /* If either argument is a constant, then modifying X can not affect IN.  */