Re: [patch tree-optimization]: Improve handling of conditional-branches on targets with high branch costs

[Kai Tietz]

I describe the sample more closely here

extern int global = 0;
extern int *a = NULL;

void catchSigSegV( int sig )
{
  a = &global;
 }

int foo (int j)
{
 signal (SIGSEGV, catchSigSegV);
 if (*a && global) return 2;
 return 0;
}

I admit that in most cases such a scenario is not common.  This sample
seems to be a valid C program.  So the conditions in IF shall be
evaluted strict in order of sequence-points, as first argument might
trap.
It doesn't matter if second argument have side-effects or none.  The
point is the first and so it has to be separated from other
conditions.

Regards,
Kai