Hi,
That was quick :)
> Your asm has no output operands and no side effects, with more
> aggressive optimization the whole ask would disappear.
Sorry, that was just a small test file, the original code has output operands.
The new test code:
static int inline f1(int arg)
{
register int ret asm("r1");
register int a1 asm("r8") = 10;
register int a2 asm("r1") = arg;
asm volatile ("scall" : "=r"(ret) : "r"(a1), "r"(a2) : "memory");
return ret;
}
int f2(int arg1, int arg2)
{
return f1(arg1 >> 10);
}
translates to the same assembly:
f2:
addi sp, sp, -4
sw (sp+4), ra
addi r2, r0, 10
calli __ashrsi3
scall
lw ra, (sp+4)
addi sp, sp, 4
b ra
PS. R1 is the return register in the target architecture ABI.
--
Michael
