[Bug c/38338] New: Compile abort when compiling code which used to work

[rfm at gnu dot org]

The compiler aborts wile building the GNUstep base library.
The problem was originally in an objective-c file, but I isolated it to a small
fragment of C code which causes the same failure.

Compiler version is:

Target: i686-pc-linux-gnu
Configured with: ../configure --with-mpfr=/usr/local --enable-shared
--enable-threads=posix --enable-objc-gc --enable-languages=c,c++,objc,obj-c++
Thread model: posix
gcc version 4.4.0 20081128 (experimental) (GCC) 

Here is the compiler error message:

.c: In function ‘apply_char’:
x.c:12: error: unable to find a register to spill in class ‘Q_REGS’
x.c:12: error: this is the insn:
(insn 3 2 7 2 x.c:9 (set (mem/c/i:QI (plus:SI (reg/f:SI 20 frame)
                (const_int -20 [0xffffffec])) [0 data+0 S1 A8])
        (subreg:QI (reg:SI 4 si [63]) 0)) 50 {*movqi_1} (expr_list:REG_DEAD
(reg:SI 4 si [63])
        (nil)))
x.c:12: internal compiler error: in spill_failure, at reload1.c:2093
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.



Here is the command line to compile the program:

  gcc x.c -c -fPIC 

Here is the program (x.c):


typedef void(*apply_t)(void);

static  char return_char (char data)
    {
      return data;
    }
static  void* apply_char(char data)
    {
      void* args = __builtin_apply_args();
      return __builtin_apply((apply_t)return_char, args, sizeof(void*));
    }


-- 
           Summary: Compile abort when compiling code which used to work
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rfm at gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38338