offsets for covariant thunks.

llvm-svn: 83965

llvm-svn: 83964

which is a common idiom to improve PIC'ness of code using the addr of
label extension.  This implementation is a gross hack, but the only other
alternative would be to teach evalutate about this horrid combination.
While GCC allows things like "&&foo - &&bar + 1", people don't use this
in practice.  This implements PR5131.

llvm-svn: 83957

1. CGF now has fewer bytes of state (one pointer instead of a vector).
2. The generated code is determinstic, instead of getting labels in
   'map order' based on pointer addresses.
3. Clang now emits one 'indirect goto switch' for each function, instead
   of one for each indirect goto.  This fixes an M*N = N^2 IR size issue
   when there are lots of address-taken labels and lots of indirect gotos.
4. This also makes the default cause do something useful, reducing the
   size of the jump table needed (by one).

llvm-svn: 83952

for a null pointer.  In other words, "&&foo != NULL" will always work out to
true.

llvm-svn: 83948

more places in clang codegen now.

llvm-svn: 83947

llvm-svn: 83928

llvm-svn: 83913

llvm-svn: 83912

llvm-svn: 83900

llvm-svn: 83886

llvm-svn: 83883

llvm-svn: 83882

Factor out devirtualization checking into a separate function and make it handle references correctly.

llvm-svn: 83880

llvm-svn: 83816

llvm-svn: 83808

llvm-svn: 83800

llvm-svn: 83798

llvm-svn: 83793

llvm-svn: 83732

variable inside the block.

llvm-svn: 83729

llvm-svn: 83676

llvm-svn: 83659

llvm-svn: 83609

llvm-svn: 83582

Record location info before emiting alloca for arguments. This allows arguments to have proper location info.

llvm-svn: 83567

If a global initializer has a non-trivial constructor or destructor, we never want to defer generation of it, even if it is declared static.

With this change we're finally able to compile and run the (infamous)

#include <string>
#include <iostream>

int main(int argc, char **argv) {
  std::cout << "Hello, World" << std::endl;
}

$ clang hello.cpp -lstdc++ -o hello
$ ./hello 
Hello, World

llvm-svn: 83559

llvm-svn: 83557

llvm-svn: 83448

Add a MangleContext and pass it to all mangle functions. It will be used for keeping state, such as identifiers assigned to anonymous structs as well as scope encoding.

llvm-svn: 83442

llvm-svn: 83428

Change GetAddressCXXOfBaseClass to use CXXBasePaths for calculating base class offsets. Fix the code to handle virtual bases as well.

llvm-svn: 83426

llvm-svn: 83420

llvm-svn: 83419

This is not yet enabled.

llvm-svn: 83399

Emit the destructor epilogue in a cleanup block so a return from a destructor body still calls the epilogue.

llvm-svn: 83397

llvm-svn: 83395

llvm-svn: 83352

llvm-svn: 83342

llvm-svn: 83337