Fix constant libcalls

[Jan Hubicka]

Hi,
as noticed by Zdenek, we are not setting emitting constant libcalls as constant
functions, as we throw the information away early in emit_library_call_value_1.
Crazy...

bootstrapped/regtested i386

Thu Nov  8 20:47:37 CET 2001  Jan Hubicka  <jh@suse.cz>
			      Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* calls.c (emit_library_call_value_1): Set ECF_PURE/ECF_CONST for
	LCT_PURE/LCT_CONST functions.

Index: calls.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/calls.c,v
retrieving revision 1.208
diff -c -3 -p -r1.208 calls.c
*** calls.c	2001/11/04 02:51:21	1.208
--- calls.c	2001/11/08 19:47:11
*************** emit_library_call_value_1 (retval, orgfu
*** 3516,3524 ****
    switch (fn_type)
      {
      case LCT_NORMAL:
      case LCT_CONST:
      case LCT_PURE:
!       /* Nothing to do here.  */
        break;
      case LCT_CONST_MAKE_BLOCK:
        flags |= ECF_CONST;
--- 3516,3527 ----
    switch (fn_type)
      {
      case LCT_NORMAL:
+       break;
      case LCT_CONST:
+       flags |= ECF_CONST;
+       break;
      case LCT_PURE:
!       flags |= ECF_PURE;
        break;
      case LCT_CONST_MAKE_BLOCK:
        flags |= ECF_CONST;