[all-commits] [llvm/llvm-project] a7a53e: [BOLT][BTI] Add MCPlusBuilder::addBTItoBBStart

[Gergely Bálint via All-commits]

  Branch: refs/heads/users/bgergely0/bolt-add-bti-to-bb
  Home:   https://github.com/llvm/llvm-project
  Commit: a7a53e6d8ba084b149b4c0e0d6cd5d5f77d3cf15
      https://github.com/llvm/llvm-project/commit/a7a53e6d8ba084b149b4c0e0d6cd5d5f77d3cf15
  Author: Gergely Balint <gergely.balint at arm.com>
  Date:   2025-11-19 (Wed, 19 Nov 2025)

  Changed paths:
    M bolt/include/bolt/Core/MCPlusBuilder.h
    M bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp
    M bolt/unittests/Core/MCPlusBuilder.cpp

  Log Message:
  -----------
  [BOLT][BTI] Add MCPlusBuilder::addBTItoBBStart

This function contains most of the logic for BTI:
- it takes the BasicBlock and the instruction used to jump to it.
- then it checks if the first non-pseudo instruction is a sufficient
landing pad for the used call.
- if not, it generates the correct BTI instruction.

Also introduce the isBTIVariantCoveringCall helper to simplify the logic.



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