What optimisation option is needed to prod arm-elf-gcc -mthumb to
generate a tail call? ARM works as expected.
Please cc me in your reply. Thanks!
Shaun
arm-elf-gcc (GCC) 4.1.0
$ cat EOF tail.c
int tail(void);
int main()
{
return tail();
}
EOF
$ arm-elf-gcc -mthumb -S -O2 tail.c
$ sed
On Wed, May 10, 2006 at 02:38:30PM -0600, Shaun Jackman wrote:
What optimisation option is needed to prod arm-elf-gcc -mthumb to
generate a tail call? ARM works as expected.
It's not yet supported. Remember, bl has a long range but clobbers lr, and
there's no long branch instruction, so you
On Wednesday 10 May 2006 21:38, Shaun Jackman wrote:
What optimisation option is needed to prod arm-elf-gcc -mthumb to
generate a tail call? ARM works as expected.
Thumb only has very limited (256 byte) direct branch offsets, so tail calls
aren't possible/useful.
Paul
