ifcvt.c (struct noce_if_info): Add test_bb.

        * ifcvt.c (struct noce_if_info): Add test_bb.
        (noce_get_alt_condition): New.
        (noce_try_minmax, noce_try_abs): New.
        (noce_operand_ok): New.
        (noce_process_if_block): Use them.
        * rtlanal.c (may_trap_p): NEG and ABS can never trap.

From-SVN: r40060

gcc/ChangeLog

+2001-02-25  Richard Henderson  <rth@redhat.com>
+
+	* ifcvt.c (struct noce_if_info): Add test_bb.
+	(noce_get_alt_condition): New.
+	(noce_try_minmax, noce_try_abs): New.
+	(noce_operand_ok): New.
+	(noce_process_if_block): Use them.
+	* rtlanal.c (may_trap_p): NEG and ABS can never trap.
+
 Sun Feb 25 14:26:17 2001  Christopher Faylor <cgf@cygnus.com>
 
 	* config/i386/cygwin.h (CPP_SPEC): Add missing space before w32api

gcc/rtlanal.c

@@ -2020,6 +2020,11 @@ may_trap_p (x)
 	return 1;
       break;
 
+    case NEG:
+    case ABS:
+      /* These operations don't trap even with floating point.  */
+      break;
+
     default:
       /* Any floating arithmetic may trap.  */
       if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)