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<p class="MsoNormal">If the type gets renamed, how are you going to identify what is a sampler?<o:p></o:p></p>
<p class="MsoNormal"><b><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[Villmow, Micah] Usage.</span></i></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">See my comment above about linking and opaque types as it doesn't solve that problem for you either.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Can you please share your list of pros and cons of pointer to opaque type versus int? <o:p></o:p></p>
<p class="MsoNormal"><b><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[Villmow, Micah] Sure, here is what I view as the pros and cons.<o:p></o:p></span></i></b></p>
<p class="MsoNormal"><b><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Opaque type:<o:p></o:p></span></i></b></p>
<p class="MsoNormal"><b><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Pros:<o:p></o:p></span></i></b></p>
<p class="MsoNormal"><span style="color:#1F497D">Implementation details are target dependent<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">No confusion with valid i32 type<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Utilizes the type system instead of metadata<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Can be materialized to i32 if needed<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">No operations can occur on the type.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Easier to track through stack.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Cons:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Can be renamed and loose information<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Requires initialization function<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Requires global variables<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I32:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Pros:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Can be initialized inline and constant propagated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Already works(for AMD at least).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Metadata can make for easy identification if it exists.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Maps 1-1 to initializers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Cons:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Optimizers don’t know the differences between sampler and other i32<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Harder to track through stack<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">An integer i32 and a sampler_t i32 is only determined by usage and not type.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Operations can work on the type, which is illegal.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Metadata can be lost requiring extensive analysis which cannot always be determined.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal">-Tanya<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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