[all-commits] [llvm/llvm-project] 3f1a76: [LLVM] Factor disabled Libcalls into the initializ...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3f1a76757269d0770bdb7e8086656e61019002ec
      https://github.com/llvm/llvm-project/commit/3f1a76757269d0770bdb7e8086656e61019002ec
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2024-07-11 (Thu, 11 Jul 2024)

  Changed paths:
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
    M llvm/lib/Target/ARM/ARMISelLowering.cpp
    M llvm/lib/Target/AVR/AVRISelLowering.cpp
    M llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
    M llvm/lib/Target/Mips/MipsISelLowering.cpp
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/Sparc/SparcISelLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [LLVM] Factor disabled Libcalls into the initializer (#98421)

Summary:
These Libcalls represent which functions are available to the backend.
If a runtime call is not available, the target sets the the name to
`nullptr`. Currently, this logic is spread around the various targets.
This patch pulls all of the locations that disable libcalls into the
intializer. This patch is effectively NFC.

The motivation behind this patch is that currently the LTO handling uses
the list of all runtime calls to determine which functions cannot be
internalized and must be extracted from static libraries. We do not want
this to happen for libcalls that are not emitted by the backend. A
follow-up patch will move out this logic so the LTO pass can know which
rtlib calls are actually used by the backend.



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