Mainline is broken on ia64

[H. J. Lu]

I got

/net/gnu-13/export/gnu/src/gcc/gcc/gcc/df-scan.c: In function
`df_record_entry_block_defs':
/net/gnu-13/export/gnu/src/gcc/gcc/gcc/df-scan.c:1753: error:
`INCOMING_RETURN_ADDR_RTX' undeclared (first use in this function)
/net/gnu-13/export/gnu/src/gcc/gcc/gcc/df-scan.c:1753: error: (Each
undeclared identifier is reported only once
/net/gnu-13/export/gnu/src/gcc/gcc/gcc/df-scan.c:1753: error: for each
function it appears in.)
make[5]: *** [df-scan.o] Error 1
make[5]: *** Waiting for unfinished jobs....

[hjl@gnu-13 gcc]$ grep INCOMING_RETURN_ADDR_RTX *.c
df-scan.c:      if (REG_P (INCOMING_RETURN_ADDR_RTX))
df-scan.c:      bitmap_set_bit (df->entry_block_defs, REGNO
(INCOMING_RETURN_ADDR_RTX));
dwarf2out.c:   INCOMING_RETURN_ADDR_RTX.  */
dwarf2out.c:  initial_return_save (INCOMING_RETURN_ADDR_RTX);
function.c:#if defined(HAVE_epilogue) &&
defined(INCOMING_RETURN_ADDR_RTX)
function.c:#if defined(HAVE_epilogue) &&
defined(INCOMING_RETURN_ADDR_RTX)
function.c:       rtx retaddr = INCOMING_RETURN_ADDR_RTX;
function.c:#ifdef INCOMING_RETURN_ADDR_RTX

df-scan.c doesn't check if INCOMING_RETURN_ADDR_RTX is defined.


H.J.