Opened 6 years ago

Closed 18 months ago

#44 closed defect (invalid)

zero_t causes warnings because it always codgens as long int

Reported by: Rob Schluntz Owned by:
Priority: minor Component: cfa-cc
Version: 1.0 Keywords:


zero_t should intelligently codegen as long int, void *, or void (*)() depending on the context.

An example where this is necessary:

typedef void (*fptr_t)();
void f(int);

int main() {
  fptr_t x;
  x = f;

The assignment function is correctly chosen as

forall( ftype FT ) FT *     ?=?( FT *    &, zero_t );

But codegens as

((void)(__x__PF___2=((long int )__f__F_i__1)));

Which causes a warning in gcc:

warning: assignment makes pointer from integer without a cast

Change History (2)

comment:1 Changed 5 years ago by Thierry Delisle

The example code no longer compiles:

CFA Version 1.0.0 (debug) error: No reasonable alternatives for expression Applying untyped: 
  Name: ?=? 
  Name: x
  Name: f

comment:2 Changed 18 months ago by Thierry Delisle

Resolution: invalid
Status: newclosed

The example code does not compile, fixing the code to compile still doesn't produce the warning.

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