GCC Bugzilla Bug 38159

ICE on AVR target: gcc.c-torture/execute/pr38051.c compilation,  -O3
-fomit-frame-pointer -funroll-all-loops -finline-functions

Executing on host: /usr/local/avrdev/gcc/build/gcc/xgcc
-B/usr/local/avrdev/gcc/build/gcc/
/usr/local/avrdev/gcc/gcc/gcc/testsuite/gcc.c-torture/execute/pr38051.c  -w 
-O3 -fomit-frame-pointer -funroll-all-loops -finline-functions 
-DSTACK_SIZE=2048 -DNO_TRAMPOLINES  -DSIGNAL_SUPPRESS -mmcu=atmega128 
/root/dejagnuboards/exit.c -Wl,-u,vfprintf -lprintf_flt
-Wl,-Tbss=0x802000,--defsym=__heap_end=0x80ffff  -lm   -o
/usr/local/avrdev/gcc/build/gcc/testsuite/gcc/pr38051.x5    (timeout = 300)
/usr/local/avrdev/gcc/gcc/gcc/testsuite/gcc.c-torture/execute/pr38051.c: In
function 'mymemcmp':

/usr/local/avrdev/gcc/gcc/gcc/testsuite/gcc.c-torture/execute/pr38051.c:189:
error: unable to find a register to spill in class 'POINTER_REGS'

/usr/local/avrdev/gcc/gcc/gcc/testsuite/gcc.c-torture/execute/pr38051.c:189:
error: this is the insn:

(insn 371 370 372 10
/usr/local/avrdev/gcc/gcc/gcc/testsuite/gcc.c-torture/execute/pr38051.c:63 (set
(reg/v:SI 397 [ a0 ])

        (mem:SI (subreg:HI (reg/v:SI 413 [ srcp1 ]) 0) [2 S4 A8])) 12 {*movsi}
(nil))

/usr/local/avrdev/gcc/gcc/gcc/testsuite/gcc.c-torture/execute/pr38051.c:189:
internal compiler error: in spill_failure, at reload1.c:2093

Note that  test is successful with:
PASS: gcc.c-torture/execute/pr38051.c execution,  -O3 -fomit-frame-pointer
-funroll-loops 

The only difference is the flag -finline-functions, which seems to trigger the
bug.

What's sizeof (void *) and sizeof (long) for avr?

(In reply to comment #1)
> What's sizeof (void *) and sizeof (long) for avr?
> 

char: 8-bit
int/short: 16-bit
pointer: 16-bit
long: 32-bit
long long: 64-bit