benchmark

7eddf469 - Skip guards on unused constant ops (#189642)

Skip guards on unused constant ops (#189642) Summary: ## Related Issue Part of #187590 ## Why Using a constant in an op (e.g. `a + b`) guards on the operand values, even if the result is never used in graph computation. Changing those values then recompiles for no reason. ## How - Add `ComputedLazyConstantVariable`: compute the result at trace time but skip the guards; output bytecode recomputes it from the inputs at runtime, so value changes do not recompile - Fall back to the normal guarded path as soon as the result actually affects tracing (control flow, tensor math, etc.) - Always on, no config flag; `test_unbacked_sources_scalar` updated so its scalar still flows into the graph Authored with an AI assistant (Claude Code). X-link: https://github.com/pytorch/pytorch/pull/189642 Approved by: https://github.com/rtimpe Reviewed By: georgehong Differential Revision: D113643215 fbshipit-source-id: 79a111cb80c780abb03f6946d9696349e8ace467