forked from OSchip/llvm-project
48 lines
1.9 KiB
C++
48 lines
1.9 KiB
C++
//===- NameMangling.cpp - Name Mangling for LLVM ----------------------------=//
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//
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// This file implements a consistent scheme for name mangling symbols.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/NameMangling.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/GlobalValue.h"
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using std::string;
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// MangleTypeName - Implement a consistent name-mangling scheme for
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// a given type.
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//
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string MangleTypeName(const Type *Ty) {
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string mangledName;
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if (Ty->isPrimitiveType()) {
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const string &longName = Ty->getDescription();
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return string(longName.c_str(), (longName.length() < 2) ? 1 : 2);
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} else if (PointerType *PTy = dyn_cast<PointerType>(Ty)) {
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mangledName = string("P_" + MangleTypeName(PTy->getElementType()));
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} else if (StructType *STy = dyn_cast<StructType>(Ty)) {
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mangledName = string("S_");
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for (unsigned i=0; i < STy->getNumContainedTypes(); ++i)
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mangledName += MangleTypeName(STy->getContainedType(i));
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} else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
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mangledName = string("A_" +MangleTypeName(ATy->getElementType()));
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} else if (MethodType *MTy = dyn_cast<MethodType>(Ty)) {
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mangledName = string("M_") + MangleTypeName(MTy->getReturnType());
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for (unsigned i = 1; i < MTy->getNumContainedTypes(); ++i)
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mangledName += string(MangleTypeName(MTy->getContainedType(i)));
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}
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return mangledName;
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}
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// mangleName - implement a consistent name-mangling scheme for all
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// externally visible (i.e., global) objects.
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// privateName should be unique within the module.
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//
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string MangleName(const string &privateName, const Value *V) {
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// Lets drop the P_ before every global name since all globals are ptrs
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return privateName + "_" +
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MangleTypeName(isa<GlobalValue>(V)
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? cast<GlobalValue>(V)->getType()->getElementType()
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: V->getType());
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}
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