Senthil Kumar Selvaraj schrieb:
On a 64 bit machine, executing$ make check RUNTESTFLAGS="avr-torture.exp=builtins-1.c --target_board=atxmega128a1" causes virtual memory allocation failure and/or large scale machine slowdown, with cc1 using up gobs (>35G) virtual memory. I tracked this down to void delay_4 (void) { __builtin_avr_delay_cycles (-1ul); } In avr_expand_delay_cycles, the operand is converted into a HOST_WIDE_UINT, which on a 64 bit machine is 0xFFFFFFFFFFFFFFFF. The range checks therefore get bypassed and the while(cycles >= 2) loop near the end keeps generating nops, exhausting memory. Given that avr_init_builtins declares delay_cycles builtin to take take an unsigned long (which I guess is 4 bytes for the AVR target), should the code be changed to consider only the lower 4 bytes? Or did I do something wrong? Regards Senthil
Please file a bug report. Thanks, Johann
