https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113617
H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |crazylht at gmail dot com --- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Jakub Jelinek from comment #0) > Since r14-4944-gf55cdce3f8dd8503e080e35be59c5f5390f6d95e the following > testcase can't be linked anymore. > for i in 1 2; do ./cc1plus -quiet -O2 -std=c++11 -fPIC -fvisibility=hidden > -fvisibility-inlines-hidden $i.ii; done; g++ -shared -o 1.so 1.s 2.s > `_ZNSt17_Function_handlerIFvvESt5_BindIFPFvPvxxxEPN3vtk6detail3smp27vtkSMPToo > ls_FunctorInternalIN12_GLOBAL__N_19CountUsesIxEELb0EEExxxEEE10_M_managerERSt9 > _Any_dataRKSH_St18_Manager_operation' referenced in section > `.data.rel.ro.local' of /tmp/ccEORVfz.o: defined in discarded section > `.text. > _ZNSt17_Function_handlerIFvvESt5_BindIFPFvPvxxxEPN3vtk6detail3smp27vtkSMPTool > s_FunctorInternalIN12_GLOBAL__N_19CountUsesIxEELb0EEExxxEEE10_M_managerERSt9_ > Any_dataRKSH_St18_Manager_operation[_ZN26vtkStaticCellLinksTemplateIxE18Threa > dedBuildLinksExxP12vtkCellArray]' of /tmp/ccEORVfz.o > `_ZNSt17_Function_handlerIFvvESt5_BindIFPFvPvxxxEPN3vtk6detail3smp27vtkSMPToo > ls_FunctorInternalIN12_GLOBAL__N_111InsertLinksIxEELb0EEExxxEEE10_M_managerER > St9_Any_dataRKSH_St18_Manager_operation' referenced in section > `.data.rel.ro.local' of /tmp/ccEORVfz.o: defined in discarded section > `.text. > _ZNSt17_Function_handlerIFvvESt5_BindIFPFvPvxxxEPN3vtk6detail3smp27vtkSMPTool > s_FunctorInternalIN12_GLOBAL__N_111InsertLinksIxEELb0EEExxxEEE10_M_managerERS > t9_Any_dataRKSH_St18_Manager_operation[_ZN26vtkStaticCellLinksTemplateIxE18Th > readedBuildLinksExxP12vtkCellArray]' of /tmp/ccEORVfz.o > > That change adds quite a few changes like: > > - leaq > _ZNSt17_Function_handlerIFvvESt5_BindIFPFvPvxxxEPN3vtk6detail3smp27vtkSMPTool > s_FunctorInternalIN12_GLOBAL__N_19CountUsesIxEELb0EEExxxEEE10_M_managerERSt9_ > Any_dataRKSH > _St18_Manager_operation(%rip), %rdx > + movq .LC73(%rip), %xmm3 > movq $0, (%rsp) > movq %rax, 32(%rsp) > leaq > _ZNSt17_Function_handlerIFvvESt5_BindIFPFvPvxxxEPN3vtk6detail3smp27vtkSMPTool > s_FunctorInternalIN12_GLOBAL__N_19CountUsesIxEELb0EEExxxEEE9_M_invokeERKSt9_A > ny_data(%rip), %rax > - movq %rdx, %xmm3 > ... > + .section .data.rel.ro.local,"aw" > ... > +.LC73: > + .quad > _ZNSt17_Function_handlerIFvvESt5_BindIFPFvPvxxxEPN3vtk6detail3smp27vtkSMPTool > s_FunctorInternalIN12_GLOBAL__N_19CountUsesIxEELb0EEExxxEEE10_M_managerERSt9_ > Any_dataRKSH_St18_Manager_operation > but as the symbol is defined in a comdat section, that results in the linker > error. > Dunno if this was just latent before, or whether we need to force such > constants also into comdat sections in the same comdat group, etc. LEA is changed to load through an indirection. Isn't it a regression?