[PreISelIntrinsicLowering] Look through ptrtoint for a constant (e.g. global ptr) when trying to produce memset_pattern16 #129220

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asb wants to merge 7 commits intollvm:mainfrom

asb:2025q1-preiselintrinsiclowering-memset-pattern-ptrpat

Commits on Feb 28, 2025

[PreISelIntrinsicLowering][test] Precommit test for failure to select memset_pattern16 for loaded constant val
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[PreISelIntrinsicLowering] Support producing memset_pattern16 when loading from constant global
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Commits on Mar 5, 2025

Commits on Mar 12, 2025