GCC Bugzilla Bug 26882

This program (which has no included files) causes an ICE and a bus error:

--

typedef unsigned char uint8_t ;
typedef unsigned short uint16_t ;
typedef unsigned long uint32_t ;

#define PROGMEM __attribute__((__progmem__))

template<typename T>
T PROGMEM * rom(const T& init)
{
        static T PROGMEM t = init;
        return &t;
}

struct funny
{
    uint8_t a;
    uint16_t b;
    uint32_t c;
};

uint8_t PROGMEM *rom1 = rom((uint8_t)123);

funny f = { 0xBB, 0xCCCC, 0xDDDDEEEE };
funny PROGMEM *rom2 = rom(f);

int main()
{
    *((volatile uint8_t*)0x55) = *rom1;
    *((volatile uint8_t*)0xAA) = rom2->a;
}

bool __cxa_guard_acquire(uint8_t *gv) { return true; }
bool __cxa_guard_release(uint8_t *gv) { return true; }

--

Environment:
System: Darwin Neds-Mini.local 8.5.0 Darwin Kernel Version 8.5.0: Sun Jan 22
10:38:46 PST 2006; root:xnu-792.6.61.obj~1/RELEASE_PPC Power Macintosh powerpc



host: powerpc-apple-darwin8.5.0
build: powerpc-apple-darwin8.5.0
target: avr-unknown-none
configured with:
/opt/local/var/db/dports/build/_Users_ned_src_darwinports_dports_cross_avr-gcc/work/gcc-4.0.2/configure
--prefix=/opt/local --infodir=/opt/local/share/info
--mandir=/opt/local/share/man --target=avr --program-prefix=avr-
--with-included-gettext --enable-obsolete
--with-gxx-include-dir=/opt/local/avr/include/c++/4.0.2/
--enable-languages=c,c++

How-To-Repeat:

Compile the above program. I used the command line:

avr-g++ -mmcu=atmega128 -c -o romtest2.o romtest2.cpp

and got this:

romtest2.cpp: In function 'T* rom(const T&) [with T = uint8_t]':
romtest2.cpp|21| instantiated from here
romtest2.cpp|10| internal compiler error: Bus error

Created an attachment (id=11133) [edit]
Test program (no included files) demonstrating the problem.

Still present in 4.2-20060429 snapshot.

Confirmed for 4.2.1 on mingw host.

test.cpp: In function 'T* rom(const T&) [with T = uint8_t]':
test.cpp:21:   instantiated from here
test.cpp:10: internal compiler error: Segmentation fault