#797 Initialize struct from return value

[Philipp Klaus Krause]

While SDCC supports assignment and return of structs, it cannot yet initialize variables by a returned struct:

typedef struct {
  char c;
} s;

s f(void);

void g(void)
{
    s s1 = f();
}

fails to compile:

philipp@notebook6:/tmp$ ~/sdcc-trunk/sdcc/bin/sdcc -mstm8 test.c 
test.c:9: error 69: struct/union/array '': initialization needs curly braces
-:0: warning 85: in function g unreferenced local variable : 's1'

[Benedikt Freisen]

This appears to be related to [bugs:#3121]. Initializer list handling blindly assumes that everything without curly braces has to be of a primitive type and cannot be a struct.

[Philipp Klaus Krause]

The patch I posted in [bugs:#3121] appears to work here, too.
The generated code should work (but is not very efficient, an optimization could eliminate the extra copy).

[Philipp Klaus Krause]

Implemented in [r15189].