[Bug target/31684] New: [4.3 Regression] ICE in get_attr_first_insn, at config/ia64/itanium2.md:1839 at -O2

[tbm at cyrius dot com]

I get the following ICE with current gcc 4.3.  This goes back until at
least 4.3 20070303.  4.1 works.  I cannot test 4.2.


tbm@coconut0:~$ /usr/lib/gcc-snapshot/bin/gcc -c -O2 mpfr-mul.c
mpfr-mul.c: In function 'mpfr_mul':
mpfr-mul.c:19: error: unrecognizable insn:
(insn:TI 69 102 68 3 (parallel [
            (set (reg:DI 136 f8)
                (asm_operands:DI ("xma.hu %0 = %2, %3, f0
        xma.l %1 = %2, %3, f0") ("=&f") 0 [
                        (reg:DI 137 f9)
                        (reg:DI 134 f6 [orig:345 D.1826 ] [345])
                    ]
                     [
                        (asm_input:DI ("f") ("") 0)
                        (asm_input:DI ("f") ("") 0)
                    ] ("mpfr-mul.c") 16))
            (set (reg/v:DI 135 f7 [orig:340 t3 ] [340])
                (asm_operands:DI ("xma.hu %0 = %2, %3, f0
        xma.l %1 = %2, %3, f0") ("=f") 1 [
                        (reg:DI 137 f9)
                        (reg:DI 134 f6 [orig:345 D.1826 ] [345])
                    ]
                     [
                        (asm_input:DI ("f") ("") 0)
                        (asm_input:DI ("f") ("") 0)
                    ] ("mpfr-mul.c") 16))
        ]) -1 (nil)
    (nil))
mpfr-mul.c:19: internal compiler error: in get_attr_first_insn, at
config/ia64/itanium2.md:1839
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see <URL:file:///usr/share/doc/gcc-4.1/README.Bugs>.
tbm@coconut0:~$ /usr/lib/gcc-snapshot/bin/gcc -c -O mpfr-mul.c
tbm@coconut0:~$ gcc-4.1 -c -O2 mpfr-mul.c
tbm@coconut0:~$

Testcase:

typedef struct
{
  unsigned long int *_mpfr_d;
}
__mpfr_struct;
typedef const __mpfr_struct *mpfr_srcptr;
mpfr_mul (mpfr_srcptr b, mpfr_srcptr c)
{
  unsigned long int *tmp;
  unsigned long int t1, t2, t3;
  unsigned long int __x;
  __x = tmp[1] + t1;
  tmp[1] = __x;
  __asm__ ("xma.hu %0 = %2, %3, f0\n\txma.l %1 = %2, %3, f0": "=&f" (t1), "=f"
(t2):"f" (((b)->_mpfr_d)[0]),
  "f" (((c)->_mpfr_d)[1]));
  __asm__ ("xma.hu %0 = %2, %3, f0\n\txma.l %1 = %2, %3, f0": "=&f" (tmp[3]),
"=f" (t3):"f" (((b)->_mpfr_d)[1]),
  "f" (((c)->_mpfr_d)[1]));
  tmp[3] += t1;
}


-- 
           Summary: [4.3 Regression] ICE in get_attr_first_insn, at
                    config/ia64/itanium2.md:1839 at -O2
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31684