* config/rs6000/rs6000.c (is_mem_ref): Ignore STACK_TIE.

From-SVN: r130791

* config/rs6000/rs6000.c (is_mem_ref): Ignore STACK_TIE.
From-SVN: r130791
1de59bbd · David Edelsohn · David Edelsohn · 4caa08da · 1de59bbd · 1de59bbd
Commit 1de59bbd authored Dec 12, 2007 by David Edelsohn Committed by David Edelsohn Dec 12, 2007
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gcc/config/rs6000/rs6000.c
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2007-12-12  David Edelsohn  <edelsohn@gnu.org>
+
+	* config/rs6000/rs6000.c (is_mem_ref): Ignore STACK_TIE.
+
 2007-12-12  Aldy Hernandez  <aldyh@redhat.com>

 	PR tree-optimization/32901
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -18383,6 +18383,11 @@ is_mem_ref (rtx pat)
  int i, j;
  bool ret = false;

+  /* stack_tie does not produce any real memory traffic.  */
+  if (GET_CODE (pat) == UNSPEC
+      && XINT (pat, 1) == UNSPEC_TIE)
+    return false;
+
  if (GET_CODE (pat) == MEM)
    return true;