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

[Nick Lewycky]

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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