http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56439
Bug #: 56439
Summary: global and local register variables don't work in a
useful way -- AVR
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56439
--- Comment #2 from Robert "Finny" Merrill
2013-02-25 03:30:47 UTC ---
Any specific sections you can point me to? I'd be interested to hear a
justification for this behavior.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56439
--- Comment #4 from Robert "Finny" Merrill
2013-02-25 05:46:29 UTC ---
Wouldn't that be a reason /against/ doing this:
mov r24,r4
lsl r24
mov r4,r24
instead of just lsl r4?
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56439
--- Comment #6 from Robert "Finny" Merrill
2013-02-25 16:39:39 UTC ---
Well other than the fact that it now uses two registers (the registers are
8-bit and ints are 16-bit), no, it does the same thing
register int foo asm ("r30");
voi
