[all-commits] [llvm/llvm-project] ffb179: [ConstantTime] Move the CT_SELECT expansion into a...

[Julius Alexandre via All-commits]

  Branch: refs/heads/users/wizardengineer/ct-select-core
  Home:   https://github.com/llvm/llvm-project
  Commit: ffb17921ec1e24b94ab32c20d04e154403270d20
      https://github.com/llvm/llvm-project/commit/ffb17921ec1e24b94ab32c20d04e154403270d20
  Author: wizardengineer <juliuswoosebert at gmail.com>
  Date:   2026-09-08 (Tue, 08 Sep 2026)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

  Log Message:
  -----------
  [ConstantTime] Move the CT_SELECT expansion into a helper

The CT_SELECT case in ExpandNode was around 180 lines. Move it to
SelectionDAGLegalize::ExpandCTSELECT and name the operands, so the case is
three lines. Pure code motion: emitted assembly is unchanged for every RUN
line of the existing ct.select codegen tests.

Also use a temporary for the promoted SELECT so the call fits on one line
instead of wrapping after the assignment.

Co-Authored-By: Claude Opus 5 <noreply at anthropic.com>



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