Update llvm-objdump’s Mach-O symbolizer code to print the name of symbol stubs.

So in fully linked images when a call is made through a stub it now gets a
comment like the following in the disassembly:

    callq	0x100000f6c             ## symbol stub for: _printf

indicating the call is to a symbol stub and which symbol it is for.  This is
done for branch reference types and seeing if the branch target is in a stub
section and if so using the indirect symbol table entry for that stub and
using that symbol table entries symbol name.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218546 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format of ChangeStdinToBinary & ChangeStdoutToBinary.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218547 91177308-0d34-0410-b5e6-96231b3b80d8
Object: BSS/virtual sections don't have contents

Users of getSectionContents shouldn't try to pass in BSS or virtual
sections.  In all instances, this is a bug in the code calling this
routine.

N.B. Some COFF implementations (like CL) will mark their BSS sections as
taking space on disk.  This would confuse COFFObjectFile into thinking
the section is larger than the file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218549 91177308-0d34-0410-b5e6-96231b3b80d8
llvm-vtabledump: Further simplification

Hoist out calls to getSection and getContents.  No functional change
intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218550 91177308-0d34-0410-b5e6-96231b3b80d8
Add LLVM_ENABLE_MODULES flag to CMake to enable building with C++ modules.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218551 91177308-0d34-0410-b5e6-96231b3b80d8
Refactor reciprocal and reciprocal square root estimate into target-independent functions (part 2).

This is purely refactoring. No functional changes intended. PowerPC is the only target
that is currently using this interface.

The ultimate goal is to allow targets other than PowerPC (certainly X86 and Aarch64) to turn this:

z = y / sqrt(x)

into:

z = y * rsqrte(x)

And:

z = y / x

into:

z = y * rcpe(x)

using whatever HW magic they can use. See http://llvm.org/bugs/show_bug.cgi?id=20900 .

There is one hook in TargetLowering to get the target-specific opcode for an estimate instruction
along with the number of refinement steps needed to make the estimate usable.

Differential Revision: http://reviews.llvm.org/D5484



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218553 91177308-0d34-0410-b5e6-96231b3b80d8