Agenda and minutes for 2025-08-28 (#331)

Adding the agenda and minutes for the 2025-08-28 meeting.

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Co-authored-by: Damyan Pepper <damyanp@microsoft.com>

Author: llvm-beanz

meetings/2025-08-28.md

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+---
+title: 2025-08-28 - HLSL Working Group Minutes
+---
+
+> Propose a discussion topic by making an edit suggestion on the GitHub PR.
+
+* Discussion topics
+  * Feature availablity for DXIL/SPIRV optional features 
+    * Maybe we should have a generalized approach that works for both DXIL optional features and SPIRV profiles and extensions.
+    * Seems like general feeling is this would be an improvement over how DXC currently does things.
+    * Action item: Chris B to write up a draft design to iterate with Steven on.
+  * Quick updates:
+    * A new Qualcomm Snapdragon X builder is coming online for the offload test suite.
+    * Justin is aiming to have a PR up by the end of the week for constant buffer work.
+    * Helena is reworking resource constructors and aims to get that in before Steven's work on resource counters.
+    * Farzon noted that we will need SPIRV backend legalization for vectors larger than 4 elements because some optimizations generate them.