http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53615
--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-06-08 16:48:22 UTC --- Created attachment 27588 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27588 wek.c And here is the source file wek.c Compiled with the above options yields: $ avr-gcc -c wek.c -mmcu=atmega2561 -O3 -mstrict-X wek.c: In function 'foo': wek.c:86:20: error: can't find a register in class 'BASE_POINTER_REGS' while reloading 'asm' wek.c:86:20: error: 'asm' operand has impossible constraints At the beginning of the source you see a macro called CODE32 that is defined to a string literal which is used as inline assembler code template. If CODE32 is defined to a shorter string like #define CODE32 \ ";%2, %C1%1%A0, Z+\n\telpm %B0, Z\n\t" the compiler passes. By all of by understanding such an error should not depend on the length of the inline assembler template. Thus, does this indicates a buffer overflow or missing GTY or similar? Notice that the %-operands / %-operand sequence is unchanged in the shorter version of CODE32.
