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@@ -10,6 +10,7 @@
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// Implements generic name mangling support for blocks and Objective-C.
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//
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//===----------------------------------------------------------------------===//
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+#include "clang/AST/Attr.h"
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#include "clang/AST/Mangle.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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@@ -19,6 +20,7 @@
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#include "clang/AST/ExprCXX.h"
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#include "clang/Basic/ABI.h"
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#include "clang/Basic/SourceManager.h"
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+#include "clang/Basic/TargetInfo.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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@@ -47,6 +49,130 @@ static void mangleFunctionBlock(MangleContext &Context,
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void MangleContext::anchor() { }
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+enum StdOrFastCC {
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+ SOF_OTHER,
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+ SOF_FAST,
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+ SOF_STD
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+};
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+
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+static bool isExternC(const NamedDecl *ND) {
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+ if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND))
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+ return FD->isExternC();
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+ return cast<VarDecl>(ND)->isExternC();
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+}
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+
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+static StdOrFastCC getStdOrFastCallMangling(const ASTContext &Context,
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+ const NamedDecl *ND) {
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+ const TargetInfo &TI = Context.getTargetInfo();
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+ llvm::Triple Triple = TI.getTriple();
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+ if (!Triple.isOSWindows() || Triple.getArch() != llvm::Triple::x86)
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+ return SOF_OTHER;
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+
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+ if (Context.getLangOpts().CPlusPlus && !isExternC(ND) &&
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+ TI.getCXXABI() == TargetCXXABI::Microsoft)
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+ return SOF_OTHER;
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+
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+ const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND);
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+ if (!FD)
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+ return SOF_OTHER;
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+ QualType T = FD->getType();
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+
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+ const FunctionType *FT = T->castAs<FunctionType>();
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+
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+ CallingConv CC = FT->getCallConv();
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+ switch (CC) {
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+ default:
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+ return SOF_OTHER;
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+ case CC_X86FastCall:
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+ return SOF_FAST;
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+ case CC_X86StdCall:
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+ return SOF_STD;
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+ }
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+}
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+
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+bool MangleContext::shouldMangleDeclName(const NamedDecl *D) {
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+ const ASTContext &ASTContext = getASTContext();
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+
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+ StdOrFastCC CC = getStdOrFastCallMangling(ASTContext, D);
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+ if (CC != SOF_OTHER)
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+ return true;
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+
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+ // In C, functions with no attributes never need to be mangled. Fastpath them.
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+ if (!getASTContext().getLangOpts().CPlusPlus && !D->hasAttrs())
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+ return false;
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+
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+ // Any decl can be declared with __asm("foo") on it, and this takes precedence
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+ // over all other naming in the .o file.
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+ if (D->hasAttr<AsmLabelAttr>())
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+ return true;
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+
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+ return shouldMangleCXXName(D);
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+}
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+
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+void MangleContext::mangleName(const NamedDecl *D, raw_ostream &Out) {
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+ // Any decl can be declared with __asm("foo") on it, and this takes precedence
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+ // over all other naming in the .o file.
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+ if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) {
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+ // If we have an asm name, then we use it as the mangling.
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+
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+ // Adding the prefix can cause problems when one file has a "foo" and
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+ // another has a "\01foo". That is known to happen on ELF with the
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+ // tricks normally used for producing aliases (PR9177). Fortunately the
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+ // llvm mangler on ELF is a nop, so we can just avoid adding the \01
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+ // marker. We also avoid adding the marker if this is an alias for an
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+ // LLVM intrinsic.
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+ StringRef UserLabelPrefix =
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+ getASTContext().getTargetInfo().getUserLabelPrefix();
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+ if (!UserLabelPrefix.empty() && !ALA->getLabel().startswith("llvm."))
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+ Out << '\01'; // LLVM IR Marker for __asm("foo")
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+
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+ Out << ALA->getLabel();
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+ return;
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+ }
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+
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+ const ASTContext &ASTContext = getASTContext();
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+ StdOrFastCC CC = getStdOrFastCallMangling(ASTContext, D);
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+ bool MCXX = shouldMangleCXXName(D);
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+ const TargetInfo &TI = Context.getTargetInfo();
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+ if (CC == SOF_OTHER || (MCXX && TI.getCXXABI() == TargetCXXABI::Microsoft)) {
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+ mangleCXXName(D, Out);
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+ return;
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+ }
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+
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+ Out << '\01';
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+ if (CC == SOF_STD)
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+ Out << '_';
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+ else
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+ Out << '@';
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+
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+ if (!MCXX)
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+ Out << D->getIdentifier()->getName();
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+ else
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+ mangleCXXName(D, Out);
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+
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+ const FunctionDecl *FD = cast<FunctionDecl>(D);
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+ const FunctionType *FT = FD->getType()->castAs<FunctionType>();
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+ const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT);
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+ Out << '@';
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+ if (!Proto) {
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+ Out << '0';
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+ return;
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+ }
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+ assert(!Proto->isVariadic());
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+ unsigned ArgWords = 0;
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+ if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD))
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+ if (!MD->isStatic())
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+ ++ArgWords;
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+ for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(),
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+ ArgEnd = Proto->arg_type_end();
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+ Arg != ArgEnd; ++Arg) {
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+ QualType AT = *Arg;
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+ // Size should be aligned to DWORD boundary
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+ ArgWords += llvm::RoundUpToAlignment(ASTContext.getTypeSize(AT), 32) / 32;
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+ }
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+ Out << 4 * ArgWords;
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+}
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+
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void MangleContext::mangleGlobalBlock(const BlockDecl *BD,
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const NamedDecl *ID,
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raw_ostream &Out) {
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Rafael Espindola