Hi,

I have found a compiler error:
---(bug.cpp)----------------------------------
#include "stdio.h"

class A
{
const char *a;
unsigned int b;
public:
A() {a=NULL; b=(unsigned int)(-1);}
bool test(void) const {return b==(unsigned int)(-1);}
void foo(void) {b = 1;}
void bar(void) {printf("bar: %d\n",b);}
};

class B
{
A  a[2];
public:
A &get(int i)	{if(a[i].test())a[i].foo(); return a[i];}
};

int main(void)
{
B b;
b.get(0).bar();
return 0;
}
-----------------------------------------------
dmc -o+all bug.cpp
Internal error: cgcod 2247

Compiler version is 8.42n (beta)

Eduardo Nunes

I tried your code, and found out the optimization of hlobal common
subexpressions elimination (cse) and dead assignment elimination (da) cause the
error. Disable anyone of two optimization mentioned (-o-cse or -o-cse) will
solve the problem. Hope this can help Walter to find the bug more easily.

In article <cur994$21m7$1@digitaldaemon.com>, Eduardo Nunes says...
>
>Hi,
>
>I have found a compiler error:
>---(bug.cpp)----------------------------------
>#include "stdio.h"
>
>class A
>{
>const char *a;
>unsigned int b;
>public:
>A() {a=NULL; b=(unsigned int)(-1);}
>bool test(void) const {return b==(unsigned int)(-1);}
>void foo(void) {b = 1;}
>void bar(void) {printf("bar: %d\n",b);}
>};
>
>class B
>{
>A  a[2];
>public:
>A &get(int i)	{if(a[i].test())a[i].foo(); return a[i];}
>};
>
>int main(void)
>{
>B b;
>b.get(0).bar();
>return 0;
>}
>-----------------------------------------------
>dmc -o+all bug.cpp
>Internal error: cgcod 2247
>
>Compiler version is 8.42n (beta)
>
>Eduardo Nunes