https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70320
Bug ID: 70320
Summary: msp430 asm volatile does not accept lower-case
register names in clobber list
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: ari at stonepile dot fi
Target Milestone: ---
Following code won't compile with msp430-elf-gcc:
int f()
{
asm volatile ("mov r1, 0" ::: "r1");
}
koe.c: In function 'f':
koe.c:3:3: error: unknown register name 'r1' in 'asm'
asm volatile ("mov r1, 0" ::: "r1");
However, using "R1" instead of "r1" in clobber list compiles ok.
This is a little bit problematic when moving to this version from
old compiler version (the version on mspgcc.sourceforge.net), which
accepted lowercase register names only.
I think lowercase would be better, because people seem to write
inline assembly usually with lowercase letters.
