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Move the function decl mangling code out into its own function. No functionality change. 

llvm-svn: 68319
This commit is contained in:
Anders Carlsson 2009-04-02 15:51:53 +00:00
parent d8e97def58
commit 810679c37a
1 changed files with 38 additions and 34 deletions
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72
clang/lib/CodeGen/Mangle.cpp
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@ -34,6 +34,10 @@ namespace {
: Context(C), Out(os) { }
bool mangle(const NamedDecl *D);
private:
bool mangleFunctionDecl(const FunctionDecl *FD);
void mangleFunctionEncoding(const FunctionDecl *FD);
void mangleName(const NamedDecl *ND);
void mangleUnqualifiedName(const NamedDecl *ND);
@ -55,6 +59,37 @@ namespace {
};
}
static bool isInCLinkageSpecification(const Decl *D) {
for (const DeclContext *DC = D->getDeclContext();
!DC->isTranslationUnit(); DC = DC->getParent()) {
if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC))
return Linkage->getLanguage() == LinkageSpecDecl::lang_c;
}
return false;
}
bool CXXNameMangler::mangleFunctionDecl(const FunctionDecl *FD) {
// Clang's "overloadable" attribute extension to C/C++ implies
// name mangling (always).
if (FD->getAttr<OverloadableAttr>()) {
; // fall into mangling code unconditionally.
} else if (// C functions are not mangled
!Context.getLangOptions().CPlusPlus ||
// "main" is not mangled in C++
FD->isMain() ||
// No mangling in an "implicit extern C" header.
Context.getSourceManager().getFileCharacteristic(FD->getLocation())
== SrcMgr::C_ExternCSystem ||
// No name mangling in a C linkage specification.
isInCLinkageSpecification(FD))
return false;
// If we get here, mangle the decl name!
Out << "_Z";
mangleFunctionEncoding(FD);
return true;
}
bool CXXNameMangler::mangle(const NamedDecl *D) {
// Any decl can be declared with __asm("foo") on it, and this takes
@ -71,41 +106,10 @@ bool CXXNameMangler::mangle(const NamedDecl *D) {
// ::= <special-name>
// FIXME: Actually use a visitor to decode these?
const FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
if (!FD) // Can only mangle functions so far.
return false;
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
return mangleFunctionDecl(FD);
// Clang's "overloadable" attribute extension to C/C++ implies
// name mangling (always).
if (FD->getAttr<OverloadableAttr>()) {
; // fall into mangling code unconditionally.
} else if (// C functions are not mangled
!Context.getLangOptions().CPlusPlus ||
// "main" is not mangled in C++
FD->isMain() ||
// No mangling in an "implicit extern C" header.
Context.getSourceManager().getFileCharacteristic(FD->getLocation())
== SrcMgr::C_ExternCSystem)
return false;
else {
// No name mangling in a C linkage specification.
for (const DeclContext *DC = FD->getDeclContext();
!DC->isTranslationUnit(); DC = DC->getParent()) {
if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC)) {
// extern "C" functions don't use name mangling.
if (Linkage->getLanguage() == LinkageSpecDecl::lang_c)
return false;
// Others do.
break;
}
}
}
// If we get here, mangle the decl name!
Out << "_Z";
mangleFunctionEncoding(FD);
return true;
return false;
}
void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) {