Re: c/4399: gcc fails to recognize insn

Re: c/4399: gcc fails to recognize insn

[rodrigc]

Synopsis: gcc fails to recognize insn

State-Changed-From-To: open->closed
State-Changed-By: rodrigc
State-Changed-When: Thu Oct  4 18:19:51 2001
State-Changed-Why:
    Duplicate of PR 4199 which is fixed.
    http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=4199&database=gcc

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=4399&database=gcc

c/4399: gcc fails to recognize insn

[david]

>Number:         4399
>Category:       c
>Synopsis:       gcc fails to recognize insn
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Tue Sep 25 19:36:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     david@blue-labs.org
>Release:        gcc-20010917.tar.gz
>Organization:
>Environment:
Linux kernel 2.4.10
>Description:
gcc fails to compile linux/kernel/context.c:42 when AMD K6 cpu type is selected

gcc -D__KERNEL__ -I/usr/local/src/linux/include -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -fno-common -pipe -mpreferred-stack-boundary=2 -march=k6    -DEXPORT_SYMTAB -c context.c
context.c: In function `current_is_keventd':
context.c:42: Unrecognizable insn:
(insn 67 24 25 (parallel[ 
            (set (reg/v:SI 3 ebx [42])
                (const_int 0 [0x0]))
            (clobber (reg:CC 17 flags))
        ] ) -1 (nil)
    (expr_list:REG_UNUSED (reg:CC 17 flags)
        (nil)))
context.c:42: Internal compiler error in insn_default_length, at insn-attrtab.c:223

code:
static int keventd_running;
static struct task_struct *keventd_task;

static int need_keventd(const char *who)
{
   if (keventd_running == 0)
      printk(KERN_ERR "%s(): keventd has not started\n", who);
   return keventd_running;
}
 
int current_is_keventd(void)
{
   int ret = 0;
   if (need_keventd(__FUNCTION__))
      ret = (current == keventd_task);
   return ret;
}

closing brace of last function is line 42.
>How-To-Repeat:
Compile a 2.4.x linux kernel linux/kernel/context.c file
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: