gcc/gcc/config/msp430
..
README.txt
constraints.md
driver-msp430.c
msp430-c.c
msp430-modes.def
msp430-opts.h
msp430-protos.h
msp430.c
msp430.h
msp430.md
msp430.opt
predicates.md
t-msp430

README.txt

Random Notes
------------

The MSP430 port does not use leading underscores.  However, the
assembler has no way of differentiating between, for example, register
R12 and symbol R12.  So, if you do "int r12;" in your C program, you
may get an assembler error, and will certainly have runtime problems.