long long a();
long long b() {
return a();
}
At the end of b there will be some useless register shuffling.
This is because return wants to have the result of a in REG_IRET.
gv checks if this is the case for BOTH registers of the long long.
After this test it uses REG_LRET for the second register if the
first is supposed to be REG_IRET. In other cases it uses RC_INT.
The patch compares the second register against the class it will
have in the end instead of the register class the first register
will have.
At this point I would like to remind those who pick up the patches
that there are two other mails by me with uncommitted fixes:
http://lists.gnu.org/archive/html/tinycc-devel/2003-10/msg00044.htmlhttp://lists.gnu.org/archive/html/tinycc-devel/2008-08/msg00007.html
Daniel
This patch is useful for cross compilers. Without this patch tcc
tries to use the host's libraries, crt*.o and include files.
The patch prepends a string to all default paths. The string can
be passed to configure with --sysroot=string.
Daniel
Yesterday I felt the urge to change a few things in TinyCC.
This is the first and biggest change of all of them.
- use __aeabi_*divmod functions in ARM EABI to make binaries depend
solely on standardized library functions
- refactor ARM floating point <-> integer conversion a bit
- rename long long->float and shift library functions to correspond to
the names used by GCC
- compile more tokens conditionally to reduce the size of TinyCC
The intention is primarily to allow users of the ARM target to use
libgcc (which is usually available as a shared library) instead of
libtcc1 (which can't be compiled for ARM due to lack of an inline
assembler).
Changing the EABI target to use the divmod functions in theory allows
to use it without libtcc1 on any (not necessarily GCC based) ARM EABI
system.
Daniel
