#714 warning: conditional flow changed by optimizer: so said EVEL

[Slade Rich]

The latest SDCC built from CVS head is giving me an
error (Note was not a problem 3 weeks eariler). Using
the following code with "sdcc -S -V -mz80" get
warning: conditional flow changed by optimizer: so said
EVELYN the modified DOG
warning: unreachable code

unsigned short Secs;

// ----------------------------------------------------
------------------------
// Return True if it has timed out
char IsTimedOut(unsigned short timeOut) {
unsigned short diff = Secs - timeOut;
return (diff & 0x8000) ? 0 : 1;
}

// ----------------------------------------------------
------------------------
void main(void) {
IsTimedOut(0);
}

Hope you can help,
Thank you
Slade
slade_rich@users.sourceforge.net

[Erik Petrich]

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user_id=635249

This looks like a bug in the new type flow code, since (diff
& 0x8000) is being cast to the function's return type before
being evaluated. I suspect Bernhard would know how to fix
this faster (this is not a z80 specific bug).

[Bernhard Held]

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user_id=203539

Fixed in SDCCast.c 1.224