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

[Bill Wendling]

See the clang commit.

-bw

On Apr 29, 2013, at 3:27 PM, Rafael Espíndola <rafael.espindola at gmail.com> wrote:

> 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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