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Implement a new method: CloneAndPruneFunctionInto, as documented.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28518 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -130,6 +130,19 @@ void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
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const char *NameSuffix = "",
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ClonedCodeInfo *CodeInfo = 0);
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/// CloneAndPruneFunctionInto - This works exactly like CloneFunctionInto,
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/// except that it does some simple constant prop and DCE on the fly. The
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/// effect of this is to copy significantly less code in cases where (for
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/// example) a function call with constant arguments is inlined, and those
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/// constant arguments cause a significant amount of code in the callee to be
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/// dead. Since this doesn't produce an exactly copy of the input, it can't be
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/// used for things like CloneFunction or CloneModule.
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void CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
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std::map<const Value*, Value*> &ValueMap,
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std::vector<ReturnInst*> &Returns,
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const char *NameSuffix = "",
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ClonedCodeInfo *CodeInfo = 0);
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/// CloneTraceInto - Clone T into NewFunc. Original<->clone mapping is
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/// saved in ValueMap.
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