[PATCH] D137982: [pgo] Avoid introducing relocations by using private alias

[Mike Hommey via Phabricator via llvm-commits]

glandium added a comment.

This broke (at least) building clang itself with PGO (note this is using the gold linker, not lld):

  ib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE14getStringTableERKNS0_13Elf_Shdr_ImplIS5_EENS_12function_refIFNS_5ErrorERKNS_5TwineEEEE: error: relocation refers to local symbol "" [534], which is defined in a discarded section
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE14getStringTableERKNS0_13Elf_Shdr_ImplIS5_EENS_12function_refIFNS_5ErrorERKNS_5TwineEEEE"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE8sectionsEv: error: relocation refers to local symbol "" [551], which is defined in a discarded section
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE8sectionsEv"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE10getSectionEj: error: relocation refers to local symbol "" [560], which is defined in a discarded section
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE10getSectionEj"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE13getSHNDXTableERKNS0_13Elf_Shdr_ImplIS5_EE: error: relocation refers to local symbol "" [561], which is defined in a discarded section
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE13getSHNDXTableERKNS0_13Elf_Shdr_ImplIS5_EE"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE13getSHNDXTableERKNS0_13Elf_Shdr_ImplIS5_EENS_8ArrayRefIS8_EE: error: relocation refers to local symbol "" [562], which is defined in a discarded section
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE13getSHNDXTableERKNS0_13Elf_Shdr_ImplIS5_EENS_8ArrayRefIS8_EE"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE21getRelocationTypeNameEjRNS_15SmallVectorImplIcEE: error: relocation refers to local symbol "" [590], which is defined in a discarded section 
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE21getRelocationTypeNameEjRNS_15SmallVectorImplIcEE"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZN4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE6createENS_9StringRefE: error: relocation refers to local symbol "" [713], which is defined in a discarded section
    section group signature: "_ZN4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE6createENS_9StringRefE"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE21getSectionStringTableENS_8ArrayRefINS0_13Elf_Shdr_ImplIS5_EEEENS_12function_refIFNS_5ErrorERKNS_5TwineEEEE: error: relocation refers to local symbol "" [749], which is defined in a discarded section
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE21getSectionStringTableENS_8ArrayRefINS0_13Elf_Shdr_ImplIS5_EEEENS_12function_refIFNS_5ErrorERKNS_5TwineEEEE"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)
  lib/libLLVMObject.a(ELF.cpp.o):ELF.cpp:__profd__ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE15getSectionIndexERKNS0_12Elf_Sym_ImplIS5_EENS_8ArrayRefIS8_EENS0_10DataRegionINS3_6detail31packed_endian_specific_integralIjLS4_1ELm1ELm1EEEEE: error: relocation refers to local symbol "" [753], which is defined in a discarded section
    section group signature: "_ZNK4llvm6object7ELFFileINS0_7ELFTypeILNS_7support10endiannessE1ELb0EEEE15getSectionIndexERKNS0_12Elf_Sym_ImplIS5_EENS_8ArrayRefIS8_EENS0_10DataRegionINS3_6detail31packed_endian_specific_integralIjLS4_1ELm1ELm1EEEEE"
    prevailing definition is from lib/libLLVMRuntimeDyld.a(RuntimeDyldELF.cpp.o)

etc.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137982/new/

https://reviews.llvm.org/D137982