[all-commits] [llvm/llvm-project] 516867: [PseudoProbe] Preserve pseudoprobe for tailcall ps...

[Henry Jiang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 516867bc96ae3e3a40b296f038d24ee53cf0f5c0
      https://github.com/llvm/llvm-project/commit/516867bc96ae3e3a40b296f038d24ee53cf0f5c0
  Author: Henry Jiang <henry_jiang2 at apple.com>
  Date:   2026-06-02 (Tue, 02 Jun 2026)

  Changed paths:
    M llvm/lib/CodeGen/PseudoProbeInserter.cpp
    A llvm/test/CodeGen/AArch64/aarch64-pseudo-probe-tail-call.ll
    A llvm/test/CodeGen/X86/pseudo-probe-tail-call.ll

  Log Message:
  -----------
  [PseudoProbe] Preserve pseudoprobe for tailcall pseudo instrs (#197246)

Preserve probes for tail call pseudo instructions. 

On AArch64, X86, and other platforms, the lowering of tail calls
requires a pseudo instruction like `TCRETURNdi`. It is often the case
that `TCRETURNdi` is within its own MBB, and the direct call probe
associated with that tail call is considered dangling and removed. This
patch tries to preserve that.



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