On Wed, Nov 14, 2018 at 1:52 PM Maciej Stachowiak <mjs@apple.com> wrote: > Consider OpUndef. The whole purpose of this instruction is to invoke an > undefined behavior for the sake of performance (since initializing may be > costly when it’s not necessary). Does any shader program containing OpUndef > get rejected? Does it trap and halt? Does it return an arbitrary value that > is uninitialized and therefore may lead to reading stale data ? Does it > initialize to a specific known value (e.g. zero)? > > The env spec states: OpUndef is not allowed. So, the shader would be rejected as invalid. danReceived on Wednesday, 14 November 2018 19:31:17 UTC
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