[FuncAttrs] Relax norecurse attribute inference#139943

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usha1830 wants to merge 12 commits intollvm:mainfrom

usha1830:relax_norecurse

Commits on Sep 9, 2025

[FuncAttrs] Relax norecurse attribute when callee is self-recursive
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Skip checks on callee which already have norecurse attribute
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Bail without adding norecurse if address of function is taken as it could be called back in
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Infer norecurse for functions with external function call/library function callls if none of the user functions have had there address taken
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Allow norecurse on functions calling library functions only when there are no external references
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Check for functions's LocalLinkage when applying norecurse attribute
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Apply optimizations based on linkage and function address only during LTO to avoid incorrect inference pre-LTO
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Revert changes in unaffected tests
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Additional test with a call to library function without NoCallback
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Added test option to avoid using full lto pipeline, updated tests accordingly
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Rename testfiles as per comments
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Commits on Sep 10, 2025

Rebased and addressed review comments
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