If the c code contains a global register variable the compiler generate wrong
code. gcc uses the global register var for function calls but will not save
them on stack before using them. Only register vars from r10 to r18
affected. Registers lower then 10 seem OK.
Problem occures when:
avr-gcc -O3 -g -mmcu=at90s8515 -c main.c
avr-gcc -O3 -g -mmcu=at90s8515 main.o -o go
I hope the next page give me the chance to add the source :-)
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Summary: global register variable: register is used for function
calls
Product: gcc
Version: 3.4.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: lts-rudolph at gmx dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: i686-linux-gnu
GCC target triplet: avr-unknown-none
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18798
