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223ffb6a3d
Add a test for the scenario described in the previous commit: an iterator loop with two paths where one ties r2/r7 via shared scalar id and skips a call, while the other goes through the call. Precision marks from the linked registers get spuriously propagated to the call path via propagate_precision(), hitting "backtracking call unexpected regs" in backtrack_insn(). Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260306-linked-regs-and-propagate-precision-v1-2-18e859be570d@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>