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Track reads and writes to pointer parameters for each function in the Resolver, as well as accesses to module-scope variables. At function call sites, check the root identifiers of each pointer argument to determine if problematic aliasing occurs. The MSL backend passes pointers to sub-objects to functions when handling workgroup storage variables, which triggers the alias analysis. Add a validation override for this scenario. Bug: tint:1675 Change-Id: I81a40d1309df65521cc5ad39764d6a09a260f51e Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110167 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: James Price <jrprice@google.com>