ARM - compilation error when copying reg ptr into the stack

[tfaoliveira]

When I compile the following program:

u32[1] C = {1};

export fn main() -> reg u32
{
  reg ptr u32[1] Cp;
  stack ptr u32[1] Cps;
  reg u32 c;

  Cp = C;
  Cps = Cp;
  Cp = Cps;
  c = Cp[0];
  return c;
}

I get:

, line 10 (2-11):
compilation error in function main:
asmgen: instruction ADD is given incompatible args.
Allowed args are:
  [[reg]; [reg]; [reg]]
  [[reg]; [reg]; [imm 32]]

Line 10, corresponds to Cps = Cp;.

Is seems that it is not possible to move a reg ptr into the stack. Is this a bug?

[vbgl]

Thanks for the report. That’s a bug: stack-alloc is emitting invalid instructions.