forked from OSchip/llvm-project
35 lines
1.4 KiB
C++
35 lines
1.4 KiB
C++
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//===- ExtractFunction.cpp - Extract a function from Program --------------===//
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//
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// This file implements a method that extracts a function from program, cleans
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// it up, and returns it as a new module.
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//
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//===----------------------------------------------------------------------===//
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#include "BugDriver.h"
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#include "llvm/Module.h"
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#include "llvm/PassManager.h"
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#include "llvm/Transforms/IPO.h"
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#include "llvm/Transforms/Utils/Cloning.h"
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/// extractFunctionFromModule - This method is used to extract the specified
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/// (non-external) function from the current program, slim down the module, and
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/// then return it. This does not modify Program at all, it modifies a copy,
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/// which it returns.
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Module *BugDriver::extractFunctionFromModule(Function *F) const {
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Module *Result = CloneModule(Program);
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// Translate from the old module to the new copied module...
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F = Result->getFunction(F->getName(), F->getFunctionType());
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// In addition to just parsing the input from GCC, we also want to spiff it up
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// a little bit. Do this now.
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//
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PassManager Passes;
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Passes.add(createFunctionExtractionPass(F)); // Extract the function
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Passes.add(createGlobalDCEPass()); // Delete unreachable globals
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Passes.add(createFunctionResolvingPass()); // Delete prototypes
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Passes.add(createDeadTypeEliminationPass()); // Remove dead types...
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Passes.run(*Result);
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return Result;
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}
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