re PR rtl-optimization/9651 ([Alpha] FPE with NAN in spite of isnan protection)

        PR optimization/9651
        * rtlanal.c (may_trap_p): Handle FIX.

From-SVN: r62717

gcc/ChangeLog

+2003-02-11  Falk Hueffner  <falk.hueffner@student.uni-tuebingen.de>
+
+	PR optimization/9651
+	* rtlanal.c (may_trap_p): Handle FIX.
+
 2003-02-11  Dave Jones <davej@codemonkey.org.uk>
 
 	* config/i386/i386.c (override_options): Define c3-2 as a 686 with SSE.

gcc/rtlanal.c

@@ -2517,6 +2517,18 @@ may_trap_p (x)
 	return 1;
       break;
 
+    case FIX:
+      /* Conversion of floating point might trap.  */
+      if (flag_trapping_math && HONOR_NANS (GET_MODE (XEXP (x, 0))))
+	return 1;
+      break;
+
+    case FIX:
+      /* Conversion of floating point might trap.  */
+      if (flag_trapping_math && HONOR_NANS (GET_MODE (XEXP (x, 0))))
+	return 1;
+      break;
+
     case NEG:
     case ABS:
       /* These operations don't trap even with floating point.  */