[Bug middle-end/55498] [devirt] trunk fails inline-devirt test #6

[matt at use dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55498



--- Comment #3 from Matt Hargett <matt at use dot net> 2013-02-11 02:11:36 UTC 
---

Just tested with latest trunk and things have regressed/changed a bit. This is

another test case where I *have* to use both -O3 and -funroll-loops to get the

desired effect. This didn't use to be the case. Also, even at -O3 the indirect

references to one() and two() are inlined, but the actual immediates returned

by those functions is not.



#include <stdio.h>



typedef unsigned char(*Calculable)(void);

typedef Calculable(*CalculateStrategy)(void);



unsigned char one() { return 1; }

Calculable oneStrategy() { return one; }

unsigned char two() { return 2; }

Calculable twoStrategy() { return two; }



static void print(CalculateStrategy calculateStrategy)

{

        printf("%d\n", calculateStrategy()());

        printf("+1: %d\n", calculateStrategy()() + 1);

}



int main()

{

        for (int i = 3; i > 0; i--) {

                print(oneStrategy);

                print(twoStrategy);

        }



        return 0;

}