Add beginnigs of rtti generation, wire up more of -fno-exceptions.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77751 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCXX.cpp b/lib/CodeGen/CGCXX.cpp
index 62dabf7..356d318 100644
--- a/lib/CodeGen/CGCXX.cpp
+++ b/lib/CodeGen/CGCXX.cpp
@@ -490,10 +490,42 @@
return UniqueMangledName(Name.begin(), Name.end());
}
+llvm::Constant *CodeGenFunction::GenerateRtti(const CXXRecordDecl *RD) {
+ llvm::Type *Ptr8Ty;
+ Ptr8Ty = llvm::PointerType::get(llvm::Type::Int8Ty, 0);
+ llvm::Constant *rtti = llvm::Constant::getNullValue(Ptr8Ty);
+
+ if (!getContext().getLangOptions().Rtti)
+ return rtti;
+
+ llvm::SmallString<256> OutName;
+ llvm::raw_svector_ostream Out(OutName);
+ QualType ClassTy;
+ // FIXME: What is the design on getTagDeclType when it requires casting
+ // away const? mutable?
+ ClassTy = getContext().getTagDeclType(const_cast<CXXRecordDecl*>(RD));
+ mangleCXXRtti(ClassTy, getContext(), Out);
+ const char *Name = OutName.c_str();
+ llvm::GlobalVariable::LinkageTypes linktype;
+ linktype = llvm::GlobalValue::WeakAnyLinkage;
+ std::vector<llvm::Constant *> info;
+ assert (0 && "FIXME: implement rtti descriptor");
+ // FIXME: descriptor
+ info.push_back(llvm::Constant::getNullValue(Ptr8Ty));
+ assert (0 && "FIXME: implement rtti ts");
+ // FIXME: TS
+ info.push_back(llvm::Constant::getNullValue(Ptr8Ty));
+
+ llvm::Constant *C;
+ llvm::ArrayType *type = llvm::ArrayType::get(Ptr8Ty, info.size());
+ C = llvm::ConstantArray::get(type, info);
+ rtti = new llvm::GlobalVariable(CGM.getModule(), type, true, linktype, C,
+ Name);
+ rtti = llvm::ConstantExpr::getBitCast(rtti, Ptr8Ty);
+ return rtti;
+}
+
llvm::Value *CodeGenFunction::GenerateVtable(const CXXRecordDecl *RD) {
- const llvm::FunctionType *FTy;
- FTy = llvm::FunctionType::get(llvm::Type::VoidTy,
- std::vector<const llvm::Type*>(), false);
llvm::SmallString<256> OutName;
llvm::raw_svector_ostream Out(OutName);
QualType ClassTy;
@@ -512,7 +544,7 @@
m = llvm::Constant::getNullValue(Ptr8Ty);
int64_t offset = 0;
methods.push_back(m); offset += LLVMPointerWidth;
- methods.push_back(m); offset += LLVMPointerWidth;
+ methods.push_back(GenerateRtti(RD)); offset += LLVMPointerWidth;
for (meth_iter mi = RD->method_begin(), me = RD->method_end(); mi != me;
++mi) {
if (mi->isVirtual()) {
@@ -526,7 +558,6 @@
C = llvm::ConstantArray::get(type, methods);
llvm::Value *vtable = new llvm::GlobalVariable(CGM.getModule(), type, true,
linktype, C, Name);
- // CGM.CreateRuntimeFunction(FTy, Name);
vtable = Builder.CreateBitCast(vtable, Ptr8Ty);
// FIXME: finish layout for virtual bases
vtable = Builder.CreateGEP(vtable,
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index 5661343..b814ed7 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -358,6 +358,7 @@
/// legal to call this function even if there is no current insertion point.
void FinishFunction(SourceLocation EndLoc=SourceLocation());
+ llvm::Constant *GenerateRtti(const CXXRecordDecl *RD);
llvm::Value *GenerateVtable(const CXXRecordDecl *RD);
void EmitCtorPrologue(const CXXConstructorDecl *CD);
diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index 36ee2a4..341e230 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -42,6 +42,7 @@
void mangleGuardVariable(const VarDecl *D);
void mangleCXXVtable(QualType Type);
+ void mangleCXXRtti(QualType Type);
void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type);
void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type);
@@ -165,6 +166,12 @@
mangleType(T);
}
+void CXXNameMangler::mangleCXXRtti(QualType T) {
+ // <special-name> ::= TI <type> # typeinfo structure
+ Out << "_ZTI";
+ mangleType(T);
+}
+
void CXXNameMangler::mangleGuardVariable(const VarDecl *D)
{
// <special-name> ::= GV <object name> # Guard variable for one-time
@@ -822,4 +829,12 @@
os.flush();
}
+
+ void mangleCXXRtti(QualType Type, ASTContext &Context,
+ llvm::raw_ostream &os) {
+ CXXNameMangler Mangler(Context, os);
+ Mangler.mangleCXXRtti(Type);
+
+ os.flush();
+ }
}
diff --git a/lib/CodeGen/Mangle.h b/lib/CodeGen/Mangle.h
index 1a5ca63..8f0a32d 100644
--- a/lib/CodeGen/Mangle.h
+++ b/lib/CodeGen/Mangle.h
@@ -37,6 +37,7 @@
void mangleGuardVariable(const VarDecl *D, ASTContext &Context,
llvm::raw_ostream &os);
void mangleCXXVtable(QualType T, ASTContext &Context, llvm::raw_ostream &os);
+ void mangleCXXRtti(QualType T, ASTContext &Context, llvm::raw_ostream &os);
void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
ASTContext &Context, llvm::raw_ostream &os);
void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index e3612c7..8158b72 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -480,7 +480,6 @@
// Forward -f options which we can pass directly.
Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls);
- Args.AddLastArg(CmdArgs, options::OPT_fexceptions);
Args.AddLastArg(CmdArgs, options::OPT_ffreestanding);
Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions);
Args.AddLastArg(CmdArgs, options::OPT_fgnu_runtime);
@@ -530,6 +529,20 @@
CmdArgs.push_back("-fblocks=0");
}
+ // -fexceptions default varies depending on platform and language; only
+ // pass if specified.
+ if (Arg *A = Args.getLastArg(options::OPT_fexceptions,
+ options::OPT_fno_exceptions)) {
+ if (A->getOption().matches(options::OPT_fexceptions))
+ CmdArgs.push_back("-fexceptions");
+ else
+ CmdArgs.push_back("-fexceptions=0");
+ }
+
+ // -frtti is default, only pass non-default.
+ if (!Args.hasFlag(options::OPT_frtti, options::OPT_fno_rtti))
+ CmdArgs.push_back("-frtti=0");
+
// -fsigned-char/-funsigned-char default varies depending on platform; only
// pass if specified.
if (Arg *A = Args.getLastArg(options::OPT_fsigned_char,
@@ -1669,6 +1682,7 @@
// Derived from darwin_iphoneos_libgcc spec.
CmdArgs.push_back("-lgcc_s.10.5");
} else if (Args.hasArg(options::OPT_shared_libgcc) ||
+ // FIXME: -fexceptions -fno-exceptions means no exceptions
Args.hasArg(options::OPT_fexceptions) ||
Args.hasArg(options::OPT_fgnu_runtime)) {
// FIXME: This is probably broken on 10.3?