[llvm] r186853 - Initialize/Register LTO passes to enable flags like -print-after=<lto-pass>

[Shuxin Yang]

Thank you Nick. Committed in r186931. Sorry for being sloppy.

On 7/22/13 10:35 PM, Nick Lewycky wrote:
> Shuxin Yang wrote:
>> Author: shuxin_yang
>> Date: Mon Jul 22 13:40:34 2013
>> New Revision: 186853
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=186853&view=rev
>> Log:
>> Initialize/Register LTO passes to enable flags like 
>> -print-after=<lto-pass>
>>
>> There already have two "dead" functions, initialize{IPO|IPA}, defined 
>> for
>> similar purpose. I decide not to call these two functions for two 
>> reasons:
>>    o. they don't cover all LTO passes (which will soon be separated 
>> into IPO
>>       and post-IPO passes)
>>    o. We have not yet figured out the right passes and the ordering 
>> for IPO
>>       and post-IPO stages, meaning this change is only for the time 
>> being.
>>
>> Since LTO passes are registered, we are now able to print IR before and
>> after particular point.
>>
>> For OSX users:
>> --------------
>>    "...-Wl,-mllvm -Wl,-print-after=<pass-name>" will print IR after the
>>    specified pass.
>>
>> For Other UNIX with GNU gold linker:
>> ------------------------------------
>>    "-Wl,-plugin-opt=-print-after=<pass-name>" should work.
>>    (NOTE: no need for "-Wl,-mllvm")
>>
>>    Strip "-Wl," if flags are fed directly to linker instead of 
>> clang/clang++.
>>
>> Modified:
>>      llvm/trunk/tools/lto/LTOCodeGenerator.cpp
>>      llvm/trunk/tools/lto/LTOCodeGenerator.h
>>
>> Modified: llvm/trunk/tools/lto/LTOCodeGenerator.cpp
>> URL: 
>> http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto/LTOCodeGenerator.cpp?rev=186853&r1=186852&r2=186853&view=diff
>> ============================================================================== 
>>
>> --- llvm/trunk/tools/lto/LTOCodeGenerator.cpp (original)
>> +++ llvm/trunk/tools/lto/LTOCodeGenerator.cpp Mon Jul 22 13:40:34 2013
>> @@ -24,6 +24,7 @@
>>   #include "llvm/IR/DerivedTypes.h"
>>   #include "llvm/IR/LLVMContext.h"
>>   #include "llvm/IR/Module.h"
>> +#include "llvm/InitializePasses.h"
>>   #include "llvm/Linker.h"
>>   #include "llvm/MC/MCAsmInfo.h"
>>   #include "llvm/MC/MCContext.h"
>> @@ -77,6 +78,7 @@ LTOCodeGenerator::LTOCodeGenerator()
>>     InitializeAllTargets();
>>     InitializeAllTargetMCs();
>>     InitializeAllAsmPrinters();
>> +  initializeLTOPasses();
>>   }
>>
>>   LTOCodeGenerator::~LTOCodeGenerator() {
>> @@ -89,6 +91,36 @@ LTOCodeGenerator::~LTOCodeGenerator() {
>>       free(*I);
>>   }
>>
>> +// Initialize LTO passes. Please keep this funciton in sync with
>> +// PassManagerBuilder::populateLTOPassManager(), and  make sure all LTO
>
> Two spaces in "and  make" should be one space.
>
> Nick
>
>> +// passes are initialized.
>> +//
>> +void LTOCodeGenerator::initializeLTOPasses() {
>> +  PassRegistry&R = *PassRegistry::getPassRegistry();
>> +
>> +  initializeInternalizePassPass(R);
>> +  initializeIPSCCPPass(R);
>> +  initializeGlobalOptPass(R);
>> +  initializeConstantMergePass(R);
>> +  initializeDAHPass(R);
>> +  initializeInstCombinerPass(R);
>> +  initializeSimpleInlinerPass(R);
>> +  initializePruneEHPass(R);
>> +  initializeGlobalDCEPass(R);
>> +  initializeArgPromotionPass(R);
>> +  initializeJumpThreadingPass(R);
>> +  initializeSROAPass(R);
>> +  initializeSROA_DTPass(R);
>> +  initializeSROA_SSAUpPass(R);
>> +  initializeFunctionAttrsPass(R);
>> +  initializeGlobalsModRefPass(R);
>> +  initializeLICMPass(R);
>> +  initializeGVNPass(R);
>> +  initializeMemCpyOptPass(R);
>> +  initializeDCEPass(R);
>> +  initializeCFGSimplifyPassPass(R);
>> +}
>> +
>>   bool LTOCodeGenerator::addModule(LTOModule* mod, std::string&  
>> errMsg) {
>>     bool ret = _linker.linkInModule(mod->getLLVVMModule(),&errMsg);
>>
>>
>> Modified: llvm/trunk/tools/lto/LTOCodeGenerator.h
>> URL: 
>> http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto/LTOCodeGenerator.h?rev=186853&r1=186852&r2=186853&view=diff
>> ============================================================================== 
>>
>> --- llvm/trunk/tools/lto/LTOCodeGenerator.h (original)
>> +++ llvm/trunk/tools/lto/LTOCodeGenerator.h Mon Jul 22 13:40:34 2013
>> @@ -56,6 +56,8 @@ struct LTOCodeGenerator {
>>     void setCodeGenDebugOptions(const char *opts);
>>
>>   private:
>> +  void initializeLTOPasses();
>> +
>>     bool generateObjectFile(llvm::raw_ostream&out, std::string&errMsg);
>>     void applyScopeRestrictions();
>>     void applyRestriction(llvm::GlobalValue&GV,
>>
>>
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