[Bug inline-asm/48435] Assertion failure during IRA (df_scan)

[avr at gjlay dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48435

--- Comment #1 from Georg-Johann Lay <avr at gjlay dot de> 2011-04-04 16:00:13 UTC ---
Created attachment 23869
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23869
much simpler testcase

There is a much simpler testcase that shows the reload problems for finding a
register, at least:

long val (unsigned int addr)
{
    long val;
    asm volatile ("; " : "+z" (addr), "=r" (val));
    return val;
}


avr-gcc iasm.c -S -Os
iasm.c: In function 'val':
iasm.c:5:5: error: can't find a register in class 'POINTER_REGS' while
reloading 'asm'
iasm.c:5:5: error: 'asm' operand has impossible constraints