(expand_abs): When OP0 and TARGET are the same pseudo register, it is

safe to use TARGET. From-SVN: r12619

(expand_abs): When OP0 and TARGET are the same pseudo register, it is
safe to use TARGET. From-SVN: r12619
5c0bf747 · Richard Kenner · 68342d36 · 5c0bf747
Commit 5c0bf747 authored Aug 11, 1996 by Richard Kenner
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gcc/optabs.c
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--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -2118,6 +2118,13 @@ expand_abs (mode, op0, target, unsignedp, safe)
    }

  /* If that does not win, use conditional jump and negate.  */
+
+  /* It is safe to use the target if it is the same
+     as the source if this is also a pseudo register */
+  if (op0 == target && GET_CODE (op0) == REG
+      && REGNO (op0) >= FIRST_PSEUDO_REGISTER)
+    safe = 1;
+
  op1 = gen_label_rtx ();
  if (target == 0 || ! safe
      || GET_MODE (target) != mode