[all-commits] [llvm/llvm-project] 77c8d2: [GlobalISel] Fix ZExt known bits for scalable vect...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 77c8d214131e951e3d3a07b45a7436f54988d6f3
      https://github.com/llvm/llvm-project/commit/77c8d214131e951e3d3a07b45a7436f54988d6f3
  Author: David Green <david.green at arm.com>
  Date:   2025-05-21 (Wed, 21 May 2025)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp
    A llvm/test/CodeGen/AArch64/GlobalISel/knownbits-assertzext.mir
    A llvm/test/CodeGen/AArch64/GlobalISel/knownbits-trunk.mir
    A llvm/test/CodeGen/AArch64/GlobalISel/knownbits-zext.mir

  Log Message:
  -----------
  [GlobalISel] Fix ZExt known bits for scalable vectors. (#140213)

It was using the full size of the vector as the SrcBitWidth. This patch
changes the code to split G_ASSERT_ZEXT away from the others (G_INTTOPTR
/ G_PTRTOINT / G_ZEXT / G_TRUNC) which are simpler, and make the code
match the SDAG equivalent.



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