ICE at flow.c:2621

[Craig Newell]

Hi All,

  I have just checked out the latest CVS source and built a cross compiler
for the arm (host=i686-pc-linux-gnu, target=arm-unknown-elf).  When
building my current project, I have hit an ICE in flow.c.  Note that the
nightly build compiler at http://www.codesourcery.com/gcc-compile.html
compiles this fine so it appears that the bug is not stressed on the x86.

  Here is a min. test case built with arm-elf-gcc -O2 bad.c that fails:

-- bad.c --
typedef struct {
        short   a;
        short   b;
} s1;

extern void g(unsigned char *b);

void f(void)
{
        s1        a;
	unsigned char *b;

        a.a = 0;
	b = (unsigned char *)&a;	
        g(b);           
}
--------

And the compiler output:

----
arm-elf-gcc -O2 bad.c
bad.c: In function `f':
bad.c:15: Internal compiler error in `verify_wide_reg_1', at flow.c:2621
Please submit a full bug report.
See <URL: http://www.gnu.org/software/gcc/bugs.html > for instructions.
---

But the following code works fine:

-- good.c --
typedef struct {
        short   a;
        short   b;
} s1;

extern void g(unsigned char *b);  
        
void f(void)
{       
        s1        a;
	unsigned char *b;
        
	b = (unsigned char *)&a;
        a.a = 0;
        g(b);
} 
-------

	Thanks,

		CraigN
--
      Craig Newell                email: CraigN@ieee.org
      Free Spirit                 icbm:  somewhere in NJ, USA