$ cat osdep.i
static void do_date (char *);
void rfc822_date (char *date)
{
do_date (date);
}
$ gcc -c -O2 -fno-omit-frame-pointer -w osdep.i
osdep.s: Assembler messages:
osdep.s:19: Error: Epilogue count of 4294967296 exceeds number of nested
prologues (0)
This is due to an extra '.restore sp' before the tail call.
.file "osdep.i"
.pred.safe_across_calls p1-p5,p16-p63
.text
.align 16
.global rfc822_date#
.proc rfc822_date#
rfc822_date:
.prologue 2, 2
.mii
nop 0
.vframe r2
mov r2 = r12
.body
;;
.restore sp
mov r12 = r2
;;
.mfb
.restore sp
.prologue
alloc r2 = ar.pfs, 0, 0, 1, 0
nop 0
br.sptk.many do_date#
;;
break.f 0
;;
.endp rfc822_date#
.ident "GCC: (GNU) 4.0.0 20041214 (experimental)"
--
Summary: [4.0 regression] [ia64] Extra '.restore sp' in tail call
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P2
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: schwab at suse dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: ia64-*-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18987
