[MC] Export MCDXContainerObjectWriter

Similar to other ObjectWriter classes.

[MC] Remove unused MCAsmLayout declarations and includes

[MC] Remove the MCAsmLayout parameter from MCObjectWriter::executePostLayoutBinding

[MC] Remove the MCAsmLayout parameter from MCObjectWriter::{writeObject,writeSectionData}

[MC] Remove the MCAsmLayout parameter from MCObjectWriter::recordRelocation

[DirectX] Reapply Fix DXIL part header version encoding (#91956)

This reapplies
https://github.com/llvm/llvm-project/commit/195d8ac26d91ca798733c3a5f58d67992d43503d
[DirectX] Fix DXIL part header

[DirectX] Reapply Fix DXIL part header version encoding (#91956)

This reapplies
https://github.com/llvm/llvm-project/commit/195d8ac26d91ca798733c3a5f58d67992d43503d
[DirectX] Fix DXIL part header version encoding. The endian issue was
fixed by
https://github.com/llvm/llvm-project/commit/f42117c8517cc928c6373bad35ebf75d94fe865b.

Move MinorVersion be the lower 8 bit.
Set DXIL version in DXContainerObjectWriter::writeObject.

Fixes #89952

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[DirectX] Replace bitfield version in ProgramHeader. (#91797)

Avoid using bitfield in dxbc::ProgramHeader.
It could potentially be read incorrectly on any host depending on the
compiler.

From [

[DirectX] Replace bitfield version in ProgramHeader. (#91797)

Avoid using bitfield in dxbc::ProgramHeader.
It could potentially be read incorrectly on any host depending on the
compiler.

From [C++17's
[class.bit]](https://timsong-cpp.github.io/cppwp/n4659/class.bit#1)
> Bit-fields are packed into some addressable allocation unit. [ Note:
Bit-fields straddle allocation units on some machines and not on others.
Bit-fields are assigned right-to-left on some machines, left-to-right on
others.  — end note ]

For #91793

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Revert "[DirectX] Fix DXIL part header version encoding" (#91791)

Test failures on big endian bots after this change.

Reverts llvm/llvm-project#91506

[DirectX] Fix DXIL part header version encoding (#91506)

Move MinorVersion be the lower 8 bit.
Set DXIL version in DXContainerObjectWriter::writeObject.


Fixes #89952

Use llvm::endianness::{big,little,native} (NFC)

Note that llvm::support::endianness has been renamed to
llvm::endianness while becoming an enum class as opposed to an
enum. This patch replaces suppo

Use llvm::endianness::{big,little,native} (NFC)

Note that llvm::support::endianness has been renamed to
llvm::endianness while becoming an enum class as opposed to an
enum. This patch replaces support::{big,little,native} with
llvm::endianness::{big,little,native}.

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[DirectX backend] PartSize not include PartHeader

PartSize for a part in dx container is only the size of the content of the part, not include size of the PartHeader.

Differential Revision: https:/

[DirectX backend] PartSize not include PartHeader

PartSize for a part in dx container is only the size of the content of the part, not include size of the PartHeader.

Differential Revision: https://reviews.llvm.org/D141207

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[DX] Create globals for DXContainer parts

DXContainer files have a handful of sections that need to be written.
This adds a pass to write the section data into IR globals, and writes
the shader flag

[DX] Create globals for DXContainer parts

DXContainer files have a handful of sections that need to be written.
This adds a pass to write the section data into IR globals, and writes
the shader flag data into a global.

The test cases here verify that the shader flags are correctly written
from the IR into the global and emitted to the DXContainer.

This change also fixes a bug in the MCDXContainerWriter, where the size
of the dxbc::ProgramHeader was not being included in the part offset
calcuations. This is verified to be working by the new testcases where
obj2yaml can properly dump part data for parts after the DXIL part.

Resolves issue #57742 (https://github.com/llvm/llvm-project/issues/57742)

Reviewed By: python3kgae

Differential Revision: https://reviews.llvm.org/D135793

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[llvm] Don't use Optional::hasValue (NFC)

bzero->memset - Fix Windows bots

How does Windows not have bzero? How did I break this while working on
a Windows-specific component of LLVM?

The world may never know...

[DirectX][MC] Add MC support for DXContainer

DXContainer files resemble traditional object files in that they are
comprised of parts which resemble sections. Adding DXContainer as an
object file for

[DirectX][MC] Add MC support for DXContainer

DXContainer files resemble traditional object files in that they are
comprised of parts which resemble sections. Adding DXContainer as an
object file format in the MC layer will allow emitting DXContainer
objects through the normal object emission pipeline.

Differential Revision: https://reviews.llvm.org/D127165

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