[all-commits] [llvm/llvm-project] 6f3efd: [X86] combineTruncatedArithmetic - move more of fo...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6f3efd80ab20d5ab4ac375da0d84d5999adbfcb9
      https://github.com/llvm/llvm-project/commit/6f3efd80ab20d5ab4ac375da0d84d5999adbfcb9
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-05-27 (Tue, 27 May 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [X86] combineTruncatedArithmetic - move more of fold inside combinei64TruncSrlConstant

Let combinei64TruncSrlConstant decide when the fold is invalid instead of splitting so many of the conditions with combineTruncatedArithmetic

NOTE: We can probably relax the i32 truncation constraint to <= i32, perform the SRL as i32 and then truncate further.

Noticed while triaging #141496



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