[Bug rtl-optimization/26235] [4.2 Regression] FAIL: gcc.c-torture/execute/ieee/fp-cmp-8l.c execution at -O1, -O2 and -Os

[rakdver at gcc dot gnu dot org]

------- Comment #9 from rakdver at gcc dot gnu dot org  2006-02-12 21:12 -------
This should fix the problem (could you please verify it?).  I am really
surprised this problem did not show on other architectures.

Index: loop-invariant.c
===================================================================
*** loop-invariant.c    (revision 110850)
--- loop-invariant.c    (working copy)
*************** hash_invariant_expr_1 (rtx insn, rtx x)
*** 292,297 ****
--- 292,299 ----
          for (j = 0; j < XVECLEN (x, i); j++)
            val ^= hash_invariant_expr_1 (insn, XVECEXP (x, i, j));
        }
+       else if (fmt[i] == 'i' || fmt[i] == 'n')
+       val ^= XINT (x, i);
      }

    return val;
*************** invariant_expr_equal_p (rtx insn1, rtx e
*** 373,378 ****
--- 375,388 ----
                return false;
            }
        }
+       else if (fmt[i] == 'i' || fmt[i] == 'n')
+       {
+         if (XINT (e1, i) != XINT (e2, i))
+           return false;
+       }
+       /* Unhandled type of subexpression, we fail conservatively.  */
+       else
+       return false;
      }

    return true;


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26235