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Re: [PATCH] speedup reg_overlap_mentioned_p

Andreas Jaeger wrote:

bonzini <paolo.bonzini@polimi.it> writes:



+  for (;;)
+    {
  switch (GET_CODE (x))
    {
+        case STRICT_LOW_PART:
+        case ZERO_EXTRACT:
+        case SIGN_EXTRACT:
+          /* Overly conservative.  */
+          x = XEXP (x, 0);
+          continue;
+

[...]


This looks strange. Why do you add the for (;;) ? I don't see a
reason for this...


It is needed for STRICT_LOWPART, ZERO_EXTRACT and SIGN_EXTRACT. There is a continue statement.

Paolo

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