[all-commits] [llvm/llvm-project] 23b028: [X86] Fix assertion failure for tail call on i686+...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 23b0281d75a4320a4e6e3d837edf94911d98d252
      https://github.com/llvm/llvm-project/commit/23b0281d75a4320a4e6e3d837edf94911d98d252
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2026-07-17 (Fri, 17 Jul 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
    A llvm/test/CodeGen/X86/tailcall-i686-pic.ll

  Log Message:
  -----------
  [X86] Fix assertion failure for tail call on i686+pic (#210302)

The pattern for TCRETURNmi has a IsNotPIC predicate, but the
checkTCRetEnoughRegs() predicate that's part of the X86tcret_enough_regs
PatFrag is evaluated first, so we can't assert that PIC is disabled
here. We should just return false in that case.

Fixes https://github.com/llvm/llvm-project/issues/210300.



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