[PATCH] D111571: [X86] `detectAVGPattern()`: support basic case of PAVG chaining (PR52131)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: llvm/lib/Target/X86/X86ISelLowering.cpp:46758
+    KnownBits Known = DAG->computeKnownBits(V);
+    unsigned MaxActiveBits = Known.getBitWidth() - Known.countMinLeadingZeros();
+    return MaxActiveBits <= ScalarVT.getSizeInBits();
----------------
Is it worth adding a KnownBits get/countMaxActiveBits wrapper?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111571/new/

https://reviews.llvm.org/D111571