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Summary: This threshold limited FunctionAttrs ability to prove arguments to be read-only. In NVPTX, a specialized instruction ld.global.nc can be used to load memory with non-coherent texture cache. We notice that in SHOC [1] benchmark, some function arguments are not marked with readonly because FunctionAttrs reaches a hardcoded threshold when analysis uses. Removing this threshold won't cause significant regression in compilation time, because the worst-case time complexity of the algorithm is still O(# of instructions) for each parameter. Patched by Xuetian Weng. [1] https://github.com/vetter/shoc Reviewers: nlewycky, jingyue, nicholas Subscribers: nicholas, test, llvm-commits Differential Revision: http://reviews.llvm.org/D11311 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243141 91177308-0d34-0410-b5e6-96231b3b80d8
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