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vtable building for simple inheritance. Still in progress. 

llvm-svn: 78110
This commit is contained in:
Mike Stump 2009-08-04 21:58:42 +00:00
parent a8720101b5
commit 9beac787c1
2 changed files with 30 additions and 4 deletions
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19
clang/lib/CodeGen/CGCXX.cpp
View File

@ -169,7 +169,7 @@ GetNestedPaths(llvm::SmallVectorImpl<const CXXRecordDecl *> &NestedBasePaths,
if (i->isVirtual())
continue;
const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
if (Base == BaseClassDecl) {
NestedBasePaths.push_back(BaseClassDecl);
return true;
@ -543,6 +543,23 @@ llvm::Value *CodeGenFunction::GenerateVtable(const CXXRecordDecl *RD) {
int64_t offset = 0;
methods.push_back(m); offset += LLVMPointerWidth;
methods.push_back(GenerateRtti(RD)); offset += LLVMPointerWidth;
for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(),
e = RD->bases_end(); i != e; ++i) {
if (i->isVirtual())
continue;
const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
for (meth_iter mi = Base->method_begin(), me = Base->method_end(); mi != me;
++mi) {
if (mi->isVirtual()) {
m = CGM.GetAddrOfFunction(GlobalDecl(*mi));
m = llvm::ConstantExpr::getBitCast(m, Ptr8Ty);
methods.push_back(m);
}
}
}
for (meth_iter mi = RD->method_begin(), me = RD->method_end(); mi != me;
++mi) {
if (mi->isVirtual()) {

15
clang/test/CodeGenCXX/virt.cpp
View File

@ -4,15 +4,20 @@
// RUN: FileCheck -check-prefix LP32 -input-file=%t-32.s %s &&
// RUN: true
class A {
struct B {
virtual void bar1();
virtual void bar2();
};
static_assert (sizeof (B) == (sizeof(void *)), "vtable pointer layout");
class A : public B {
public:
virtual void foo1();
virtual void foo2();
A() { }
} *a;
static_assert (sizeof (A) == (sizeof(void *)), "vtable pointer layout");
int main() {
A a;
}
@ -20,11 +25,15 @@ int main() {
// CHECK-LP64: __ZTV1A:
// CHECK-LP64: .space 8
// CHECK-LP64: .space 8
// CHECK-LP64: .quad __ZN1B4bar1Ev
// CHECK-LP64: .quad __ZN1B4bar2Ev
// CHECK-LP64: .quad __ZN1A4foo1Ev
// CHECK-LP64: .quad __ZN1A4foo2Ev
// CHECK-LP32: __ZTV1A:
// CHECK-LP32: .space 4
// CHECK-LP32: .space 4
// CHECK-LP32: .long __ZN1B4bar1Ev
// CHECK-LP32: .long __ZN1B4bar2Ev
// CHECK-LP32: .long __ZN1A4foo1Ev
// CHECK-LP32: .long __ZN1A4foo2Ev