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Intention of NoContraction
Is the intention of the NoContraction decoration to never fuse any two operations or to never fuse any two operations that would otherwise alter the result?
From the spec:
NoContraction
Apply to an arithmetic instruction to indicate the
operation cannot be combined with another
instruction to form a single operation. For
example, if applied to an OpFMul, that multiply
can’t be combined with an addition to yield a
fused multiply-add operation. Furthermore, such
operations are not allowed to reassociate; e.g.,
add(a + add(b+c)) cannot be transformed to
add(add(a+b) + c).
I read this as 'never fuse any two operations, period' but we'd like to be sure.
Thanks.
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