My suspicion is that this is illegal to do with enums. On Thu, Aug 5, 2010 at 9:54 AM, <gcc@xxxxxxxx> wrote: > Hello, > > I discovered what seems to be a bug in G++ 4.4 (that was not there in > prior versions and seems already fixed in 4.5) and am wondering if > there's some information available what exactly the problematic cases > are, so that I know which places in my code to verify/adapt. > > It was a "caching" problem when -O2 was enabled and an enum variable was > checked and increased in a loop and then finally checked again, all in > some very near code-lines. The final check did get an old "cached" value > of the variable, while the code below that worked with the actual value. > > When I changed the declaration of the variable from my enum type to > "volatile" or to "int", then it worked. The question is if the following > is probably illegal C++-code, although I don't think so? > > myEnumType myVariable; > > myVariable = myEnumType (myVariable + 2); > > (I extracted that piece of code into a small test-program and that > worked, strangely.) > > If someone has answers to those two questions, that'd be very nice. > Thanks so far for reading. > > Cheers! > Martin >
