[all-commits] [llvm/llvm-project] c223b6: CodeGen: Derive ARM EH pointer/selector registers ...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/codegen/eh-register-hooks-from-mcasminfo
  Home:   https://github.com/llvm/llvm-project
  Commit: c223b63fbf60afc4a24b112b4584d8a0b20d9315
      https://github.com/llvm/llvm-project/commit/c223b63fbf60afc4a24b112b4584d8a0b20d9315
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-24 (Thu, 24 Sep 2026)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
    M llvm/lib/CodeGen/MachineBasicBlock.cpp
    M llvm/lib/CodeGen/MachineLICM.cpp
    M llvm/lib/CodeGen/RDFGraph.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/lib/Target/ARM/ARMISelLowering.cpp
    M llvm/lib/Target/ARM/ARMISelLowering.h
    M llvm/lib/Target/BPF/BPFISelLowering.h
    M llvm/lib/Target/CSKY/CSKYISelLowering.cpp
    M llvm/lib/Target/CSKY/CSKYISelLowering.h
    M llvm/lib/Target/Hexagon/HexagonISelLowering.h
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.h
    M llvm/lib/Target/M68k/M68kISelLowering.cpp
    M llvm/lib/Target/M68k/M68kISelLowering.h
    M llvm/lib/Target/Mips/MipsISelLowering.h
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/PowerPC/PPCISelLowering.h
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.h
    M llvm/lib/Target/Sparc/SparcISelLowering.h
    M llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZISelLowering.h
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.h
    M llvm/lib/Target/XCore/XCoreFrameLowering.cpp
    M llvm/lib/Target/XCore/XCoreISelLowering.h
    M llvm/lib/Target/Xtensa/XtensaISelLowering.cpp
    M llvm/lib/Target/Xtensa/XtensaISelLowering.h

  Log Message:
  -----------
  CodeGen: Derive ARM EH pointer/selector registers from MCAsmInfo

Whether the exception pointer and selector are delivered in registers is an
object-format property, not a program-state one. ARM was the only target to
consult the exception model here, to test for SjLj EH, and that is a constant
for the triple already recorded in MCAsmInfo. Read it from there and drop the
ExceptionHandling argument that was threaded through
getExceptionPointerRegister and getExceptionSelectorRegister.

This is the effective revert of fdc178994aa7.

Co-authored-by: Claude (Claude-Opus-4.8) <noreply at anthropic.com>



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