[llvm] r180737 - Emit the TLS initialization function pointers into the correct section.

[Rafael Espíndola]

testcase?

On 29 April 2013 18:25, Bill Wendling <isanbard at gmail.com> wrote:
> Author: void
> Date: Mon Apr 29 17:25:40 2013
> New Revision: 180737
>
> URL: http://llvm.org/viewvc/llvm-project?rev=180737&view=rev
> Log:
> Emit the TLS initialization function pointers into the correct section.
>
> The `llvm.tls_init_funcs' (created by the front-end) holds pointers to the TLS
> initialization functions. These need to be placed into the correct section so
> that they are run before `main()'.
>
> <rdar://problem/13733006>
>
> Modified:
>     llvm/trunk/include/llvm/CodeGen/AsmPrinter.h
>     llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
>
> Modified: llvm/trunk/include/llvm/CodeGen/AsmPrinter.h
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/AsmPrinter.h?rev=180737&r1=180736&r2=180737&view=diff
> ==============================================================================
> --- llvm/trunk/include/llvm/CodeGen/AsmPrinter.h (original)
> +++ llvm/trunk/include/llvm/CodeGen/AsmPrinter.h Mon Apr 29 17:25:40 2013
> @@ -486,6 +486,7 @@ namespace llvm {
>                              unsigned uid) const;
>      void EmitLLVMUsedList(const ConstantArray *InitList);
>      void EmitXXStructorList(const Constant *List, bool isCtor);
> +    void EmitTLSInitFuncs(const ConstantArray *InitList);
>      GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy *C);
>    };
>  }
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp?rev=180737&r1=180736&r2=180737&view=diff
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp Mon Apr 29 17:25:40 2013
> @@ -1254,6 +1254,11 @@ bool AsmPrinter::EmitSpecialLLVMGlobal(c
>      return true;
>    }
>
> +  if (GV->getName() == "llvm.tls_init_funcs") {
> +    EmitTLSInitFuncs(cast<ConstantArray>(GV->getInitializer()));
> +    return true;
> +  }
> +
>    return false;
>  }
>
> @@ -1320,6 +1325,16 @@ void AsmPrinter::EmitXXStructorList(cons
>    }
>  }
>
> +/// EmitTLSInitFuncs - Emit the TLS initialization functions.
> +void AsmPrinter::EmitTLSInitFuncs(const ConstantArray *InitList) {
> +  const DataLayout *TD = TM.getDataLayout();
> +  OutStreamer.SwitchSection(getObjFileLowering().getTLSThreadInitSection());
> +  EmitAlignment(Log2_32(TD->getPointerPrefAlignment()));
> +  for (unsigned I = 0, E = InitList->getNumOperands(); I != E; ++I)
> +    EmitGlobalConstant(
> +      dyn_cast<Constant>(InitList->getOperand(I)->stripPointerCasts()));
> +}
> +
>  //===--------------------------------------------------------------------===//
>  // Emission and print routines
>  //
>
>
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