Compile error by optimization

[武田 直哉]

Hi,

I use h8300-gcc.
Only when optional optimization was applied, compile error occurred in this 
attached program. 
If optional optimization is not used, it is possible to execute the program.


------------------------------------------------------------------
This is a command and a compile error message.

u...@user-laptop:~/study/error/h8300/exec-error_4.4.0$ 
/usr/local/gcc-4.4.0_h8300-elf/bin/h8300-elf-gcc error3.c -O2
error3.c: In function 'main':
error3.c:24: error: unable to find a register to spill in class 'GENERAL_REGS'
error3.c:24: error: this is the insn:
(insn 15 14 16 2 error3.c:14 (parallel [
            (set (reg:SI 0 r0)
                (ashiftrt:SI (reg:SI 4 r4 [orig:19 VAR134___0 ] [19])
                    (reg:QI 0 r0 [orig:24 VAR191___1+3 ] [24])))
            (clobber (scratch:QI))
        ]) 222 {*shiftsi} (expr_list:REG_DEAD (reg:QI 0 r0 [orig:24 
VAR191___1+3 ] [24])
        (expr_list:REG_DEAD (reg:SI 4 r4 [orig:19 VAR134___0 ] [19])
            (nil))))
error3.c:24: confused by earlier errors, bailing out


------------------------------------------------------------------
package

binutils-2.19.1
gcc-4.4.0
newlib-1.17.0
gdb-6.8
gmp-4.3.0
mpfr-2.3.2

-----------------------------------------------------------------
OS

u...@user-laptop:~$ uname -a
Linux user-laptop 2.6.27-14-generic #1 SMP Tue Jun 30 19:57:39 UTC 2009 i686 
GNU/Linux

------------------------------------------------------------------
gcc version

Using built-in specs.
Target: h8300-elf
Configured with: ../gcc-4.4.0/configure --target=h8300-elf 
--prefix=/usr/local/gcc-4.4.0_h8300-elf/ --disable-nls --enable-languages=c 
--with-newlib 
--with-headers=/home/user/build/gcc-4.4.0_h8300-elf/newlib-1.17.0/newlib/libc/include/
 --with-gmp=/usr/local/gmp/4.3.0/ --with-mpfr=/usr/local/mpfr/2.4.1/
Thread model: single
gcc version 4.4.0 (GCC) 

------------------------------------------------------------------

I found other programs that a similar compile error occurred.
I appended only one because I don't understood whether I may append everything. 


Naoya Takeda 
Kwansei Gakuin University in Japan
mail: n-tak...@kwansei.ac.jp

 
#include <stdio.h>

#define printok() printf("@o...@\n")
#define printno() printf("@n...@\n")

int main (void)
{
   int test = 0;
   volatile long VAR134 = 0;
   volatile long VAR191 = 0;
          

   test = (VAR134>>VAR191)/5;

   if(test == 0){
       printok();
   }else{
       printno();
       printf("%d\n",test);
   }

   return 0;
}

error3.i
Description: error3.i