llvm-svn: 153807

Module-level ASM may contain definitions of functions and globals. However, we
were not telling the linker that these globals had definitions. As far as it was
concerned, they were just declarations.

Attempt to resolve this by inserting module-level ASM functions and globals into
the '_symbol' set so that the linker will know that they have values.

This gets us further towards our goal of compiling LLVM, but it still has
problems when linking libLTO.dylib because of the `-dead_strip' flag that's
passed to the linker.

<rdar://problem/11124216>

llvm-svn: 153638

llvm-svn: 153634

llvm-svn: 153612

a bunch of comments for the various functions. No intended functionality change.

llvm-svn: 153595

llvm-svn: 153567

llvm-svn: 143690

llvm-svn: 143689

around. This is important for some future work as well.

llvm-svn: 143688

llvm-svn: 139283

functions and initializers, just report the declarations present in
the module.

The motivation is to open the way for using the lazy module parsing,
which should speed up clients that just want a symbol list (nm, ar).

This is slightly less precise, but since both -strip-dead-prototypes
and -globaldce are part of the standard pipeline, this shouldn't
change the result for clang/dragonegg produced binaries.

Any decl in an IL file was also put there because a FE expected it
to be necessary, so this should not be a problem for "-O0 -emit-llvm".

As a sanity check, I have bootstrapped clang on linux and built
firefox on both linux and darwin. A clang bootstrap on darwin
with LTO fails with or without this patch because, ironically,
the linker doesn't like the combination of dead_strip and LTO
when building libLTO.so :-)

llvm-svn: 127870

of an file.

llvm-svn: 127781

uses.

The result produced by the streamer is used to give the linker more accurate
information and to add to llvm.compiler.used. The second improvement removes
the need for the user to add __attribute__((used)) to functions only used in
inline asm. The first one lets us build firefox with LTO on Darwin :-)

llvm-svn: 126830

MemoryBuffer::getOpenFile to not close the file descriptor.

llvm-svn: 125128

gold plugin.

llvm-svn: 110604

llvm-svn: 92004

Added getDefaultSubtargetFeatures method to SubtargetFeatures class which returns a correct feature string for given triple.

llvm-svn: 89236

llvm-svn: 74678

moment, that I will need to make far-reaching changes.

llvm-svn: 74655

llvm-svn: 74640

Add a pointer to the owning LLVMContext to Module.  This requires threading LLVMContext through a lot
of the bitcode reader and ASM parser APIs, as well as supporting it in all of the tools.

Patches for Clang and LLVM-GCC to follow.

llvm-svn: 74614

Parse __OBJC data structures and synthesize magic .objc_ symbols.
Also, alter mangler so that objc method names are readable.

llvm-svn: 72700

llvm-svn: 72600

llvm-svn: 69972

llvm-svn: 53693

Rename new lto2 tool as lto.
lto2->lto

llvm-svn: 52912

llvm-svn: 52470

llvm-svn: 50880

llvm-svn: 47695

first commit of new LTO system.  It is not hooked up in the llvm/tools/Makefile, so no one will build it be default yet

llvm-svn: 47621