From: linnig@skvax1.csc.ti.COM
Subject: Optimizing out elaborations
Date: 14 Oct 88 13:33:33 GMT [thread overview]
Message-ID: <8810141348.AA22416@ti.com> (raw)
Fred Hosch <fred@cs.utexas.EDU> writes:
> It's not clear to me that LRM 11.6(7) permits the compiler to optimize
> away the declaration elaboration. If K were a variable subsequently
> assigned, the "predefined operation" of assignment "need not be invoked."
> I think a CONSTRAINT_ERROR or NUMERIC_ERROR is required to be raised
> in this case?
Imagine the following program segment:
count: integer := 0;
function counter return integer;
a: constant integer := counter;
b: constant integer := counter;
c: constant integer := counter;
function counter return integer is
begin count := count +1;
return count;
end;
...
I sure would expect A and C to get 1 and 3 respectively; even if the
compiler optimized away the variable B.
Mike Linnig,
Texas Instruments
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