Makes for easier reading of the assertion macros.

Bug: b/148401179
Change-Id: Icc48baa9c476967c6dea19c2f0e91ed253dce323
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42194Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

Acts as a placeholder for no-debug-info. Implemented as nullptr.

Bug: b/148401179
Change-Id: I6cbfb227296d98befa6a7d2baa29128cb0c7bd29
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42193
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

Bug: b/148401179
Change-Id: I3a5cacc24bcb31a0b7e7cc3319ba500de59baa8a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42192Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

The inlined-at isn't currently used, but this unblocks tests that emit this instruction.

Bug: b/145351270
Change-Id: I787e0de3d7ede8225ad3a86544f867559ea9c387
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42095
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

According tot he Vulkan spec, about vkCmdBlitImage:
"As the sizes of the source and destination extents can
 differ in any dimension, texels in the source extent
 are scaled and filtered to the destination extent."

Logic was added to allow filtering in 3 dimensions in
the Blitter. Since it requires more instructions, a
state member was added in order to only filter in Z
whenever we actually to do so (when the number of
slices differ between source and destination regions).

Fixes all tests mentioned in the issue.

Bug: b/150155499
Change-Id: I63da92db94d8d0394a06271cd47d4930cf5f726a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42208
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

Bug: b/151314247
Change-Id: Ib10831c42a0c18f86397ed3b6c5d32a578653c89
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42288
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

We currently rely on limiting the mipmap level count of YCbCr images
and the presence of sampler YCbCr conversion to disable mipmapping.

This is valid, but fragile. The Vulkan 1.2 spec guarantees that when
sampler Y'CbCr conversion is used, the image view must have a Y'CbCr
format:

"If the descriptor refers to a sampler that performs Y'CbCr conversion,
 the sampler must only be used to sample the image in the same
 descriptor."

"If the image view is to be used with a sampler which supports sampler
 Y'CbCr conversion, an identically defined object of type
 VkSamplerYcbcrConversion to that used to create the sampler must be
 passed to vkCreateImageView in a VkSamplerYcbcrConversionInfo included
 in the pNext chain of VkImageViewCreateInfo. Conversely, if a
 VkSamplerYcbcrConversion object is passed to vkCreateImageView, an
 identically defined VkSamplerYcbcrConversion object must be used when
 sampling the image."

"maxMipLevels is the maximum number of mipmap levels. maxMipLevels must
 be equal to the number of levels in the complete mipmap chain based on
 the maxExtent.width, maxExtent.height, and maxExtent.depth, except when
 one of the following conditions is true, in which case it may instead
 be 1:
  * ...
  * image format is one of those listed in Formats requiring sampler
    Y′CBCR conversion for VK_IMAGE_ASPECT_COLOR_BIT image views"

Bug: b/151263485
Change-Id: Ibb8e3fe34ecda04d6fb41308437fa4c66815f1fb
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42228
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

Bug: b/149537975
Change-Id: Ia589e0015437e5257991fe2e8b5f6459384a76de
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42048
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

SetupRoutine uses V0 == V1 == V2 when drawing points, so we don't have
to duplicate those vertices explicitly.

Bug: b/149537975
Change-Id: I723a7139f5eb5735bedb0c17796c00dc4b414fa7
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42028
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

If the Reactor backend is Subzero, there's no need to build LLVM. This
is accomplished by excluding the LLVM target from the "all" target.

Bug: b/151250656
Change-Id: I26dc44921cc44d379c619700c6dd03f6fe94ee27
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42229
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>

A single change to fix windows breakage due to 'alloc' requiring an underscore prefix on some toolchains.

Changes:
    64d123947 thread.cpp: Replace use of alloca with vector.

Commands:
    git subtree pull --prefix third_party/marl https://github.com/google/marl master --squash

Bug: b/140546382
Bug: angleproject:4474
Change-Id: If15baa2531a5b49537bb0ba9f190454f2044ad9b

64d123947 thread.cpp: Replace use of alloca with vector.

git-subtree-dir: third_party/marl
git-subtree-split: 64d123947e4dbc741217ea7b49f3d2b6275be117

Also contains the following changes:
* Replace the use of `unsigned char` with `uint8_t`. `char` is not guaranteed to be 8-bit.
* Remove the `dstW` and `dstH` parameters from `BC_Decoder::Decode` and `ETC_Decoder::Decode`. They're always the same as the `w` and `h` parameters.
* Add BC6 types to various switch cases. The actual decode logic is not implemented for these formats.

Tests: *bc7*
Bug: b/151203718
Change-Id: I7b232b9dc3a9b02d172f87a62c88ce56b2cca956
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41508Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

Contains a fix for an arm linker error (chromium:1058107) and
scaling beyond 64 threads on Windows.

Changes:
    94a361cf0 thread.cpp Fix minor bug in getProcessorGroups()
    0249a2624 Thread: Use WaitForObject for Thread::join()
    62f209bbb arm: Annotate marl_fiber_swap as type %function
    00f091e08 Update README.md
    773d9f475 Add new example 'tasks_in_tasks'
    3f69e73ce Scheduler: Replace use of std::thread with marl::Thread

Commands:
    git subtree pull --prefix third_party/marl https://github.com/google/marl master --squash

Bug: b/140546382
Bug: chromium:1058107
Change-Id: Ic5a96ad5f054a19f6a5a77e1f106c73ba60c0a78

94a361cf0 thread.cpp Fix minor bug in getProcessorGroups()
0249a2624 Thread: Use WaitForObject for Thread::join()
62f209bbb arm: Annotate marl_fiber_swap as type %function
00f091e08 Update README.md
773d9f475 Add new example 'tasks_in_tasks'
3f69e73ce Scheduler: Replace use of std::thread with marl::Thread

git-subtree-dir: third_party/marl
git-subtree-split: 94a361cf0b5187a5845f3a37c9e67c8406ccb40b

By setting the RPATH to $ORIGIN, Linux executables can behave like on
Windows and search for shared libraries in the exectuables directory
before looking elsewhere. We copy SwiftShader's Vulkan library into this
directory, naming it vulkan.so.1 to match the loader name the
executables look for.

This also relies on SwiftShader exporting all Vulkan API entry functions
like the loader library does: b/148240133

Bug: b/141361933
Change-Id: I617303cc11faead7aac9e689142a4400731a58a5
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41970Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>

Test: none
Change-Id: I10ca476ed7dade95b516fabc1279fe751285114f
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42128Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>

Using --dailynow --dailychange <hash> makes Regres check out the specified
change to obtain the vk-master.txt from and perform a full run of all the
tests.

Also fix --keep usage.

Bug: none
Change-Id: Ia126bfc136e6b86a6fcc570f79a9293ae97ca392
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42109Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>

https://swiftshader-review.googlesource.com/c/SwiftShader/+/40788 and
https://swiftshader-review.googlesource.com/c/SwiftShader/+/41968 cause
us to use different compile flags for Subzero's LLVM dependencies than
the rest of SwiftShader. Suppress the warnings that this has unleashed.

Bug: b/132445520
Change-Id: I1f20e32b487035e953c02cd4829460c072e38ac3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41969
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>

Add `filter` flag to run_testlist so that tests can be filtered by wildcard or regex.
Update `run_testlist.sh` and `run_testlist.bat` to automatically use the vk-master.txt test list.

Change-Id: I94ef1d2e9220f18bdf50555db8c291b3736ec3f3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42089Reviewed-by: Paul Thomson <paulthomson@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Ben Clayton <bclayton@google.com>

The http URL now results in a redirect to an https URL.
Update the URL to the new redirect URL.
Also add the `-L` flag to curl so that future redirects don't break our presubmits.

Also verify with the provided PGP signatures instead of using a more vulnerable sha1.

Bug: none. Fixing presubmits.
Change-Id: I715c45f7083bf0f5528d82ba93d008464d0d7f88
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42093Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Tested-by: Ben Clayton <bclayton@google.com>

On some ABIs, C++ functions that return bool only set the least
significant bits of the return register (e.g. AL on x64). The Call
implementation in SubzeroReactor would use uninitialized i32 target
to hold the result of a bool-returning function, but this would return
erroneous results when the called function would return false by setting
the LSB to 0, but with a non-zero MSB, thus returning true.
This change makes sure to truncate the i32 result to i8 (bool),
returning true only if the lsb is non-zero.

Bug: b/151158858
Change-Id: I41055a94d7f8045da503f27881ed887c1926f77b
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42068Tested-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

Change-Id: I57d7aaaaf85f009721b791ad15f20ea7971a9092
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41988Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

Bug: b/149537975

Tests: dEQP-VK.*point*

Change-Id: I22ee0c0ebc4e7b414e055e2b87010004dfc8741a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41948Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Marc-Antoine Desroches <madesroches@google.com>

This is a partial revert of https://swiftshader-review.googlesource.com/c/SwiftShader/+/40788
where .c files were renamed to .cpp to avoid a warning treated as error:
command line option ‘-fno-operator-names’ is valid for C++/ObjC++ but not for C [-Werror]
This appears to have caused macOS linker issues: chromium:1059196

Instead, explicitly add the flag to compile with warnings-as-errors
(when enabled) for code that is actively maintained by us, and make
Subzero's legacy LLVM dependencies a separate library compiled without
warnings-as-errors.

Also revert CMakeSettings.json changes that were inadvertently committed.

Bug: b/141361933
Bug: chromium:1059196
Change-Id: I27dd57d954a413a710613b0bfa2e69bd5242853a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41968Reviewed-by: Marc-Antoine Desroches <madesroches@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

On Windows placing the vulkan-1.dll next to the executables suffices for
them to load SwiftShader instead of the system's Vulkan ICD loader (if
present).

Also make warnings-as-errors only affect our own projects, and put
things into project folders.

Bug: b/141361933
Change-Id: Ibdf8bcb992aa484d4bebaaf52ae77a8ced61709a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/40788
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>

Implement non-optimized version. Should generalize and optimize code in
UShort4::UShort4(RValue<Float4> cast, bool saturate) so we can use it
here.

Bug: b/145754674
Change-Id: I16a24dab2979bb97d2d5f36a406aeb62aeb976e8
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41928Tested-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

On x86-32/64, assume that loads and stores are atomic, and that
strictest memory order is supported.

Bug: b/150475088
Change-Id: I5f99a0309eca668d0c1197387bcf687b32381179
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41790Tested-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

CMake variables were renamed in
https://swiftshader-review.googlesource.com/c/SwiftShader/+/39909

This means regres has been running without DCHECK_ALWAYS_ON enabled,
possibly resulting in false positives when SwiftShader would assert.

Bug: n/a
Change-Id: Ifc4963a6c562bd21db9e1775e06dc5d4ff20f290
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41908Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>

Regression was introduced in
https://swiftshader-review.googlesource.com/c/SwiftShader/+/41269

When detecting and removing intermediate stores, if the storeValue is a
constant, we skip it; however, we must make sure to set unmatchedLoads
to true, or the optimizer will incorrectly eliminate the skipped store
on a later iteration.

This bug lead to incorrect generated code, which failed certain deqp-vk
tests, e.g. dEQP-VK.clipping.user_defined.clip_cull_distance.vert.2_6

Bug: b/148272103
Change-Id: I024d75decdc4f1d13e7f82cade50f8be09d68f3e
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41888Tested-by: Antonio Maiorano <amaiorano@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

This fixes the Vulkan Loader for CMake builds.

Bug: b/150626933
Change-Id: I600597c95c4a41f3242028fd9ccd65fced4ead33
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41848Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: James Price <jrprice@google.com>

Defines in BUILD.gn files don't apply transitively to dependencies, so
we have to repeat the SWIFTSHADER_ENABLE_ASTC for the Device
subdirectory.

Note we could also use 'public_configs = [:swiftshader_libvulkan_private_config]'
but this adds more defines and build flags than what we need. Since this
is intended as a temporary workaround anyway, we're keeping it simple.

Bug: b/150600814
Change-Id: Ib06f4a22559ee58114da5841e66e59bfce9aec4a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41868Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>

Change-Id: I05b0a9fbad99116a7163a6cb4ad43e7eccb060f3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41808
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>

To temporarily work around build issues related to Google3 integration,
make ASTC support optional and only enable it for CMake, Chromium, and
Android builds.

Bug: b/150600814
Change-Id: Iac6a404322c65a6f2727807ea8af2edfb219a5a2
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41828Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Sean Risser <srisser@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

It's valid in Vulkan for a shader to have specialization constants
and the pipeline to be lacking specialization constant data. This
could lead to a key match between the two even though there should
be a different shader payload. From the spec:

> It is legal for a SPIR-V module with specializations to be
> compiled into a pipeline where no specialization info was provided.
> SPIR-V specialization constants contain default values such that
> if a specialization is not provided.

Fix this by adding in the required checks. Should not affect perf.

Bug: b/150449637
Bug: angleproject:4426
Change-Id: I5f384420bdc1f03a36852db0b20393ae56452b62
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41728Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: Jamie Madill <jmadill@chromium.org>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

This cl adds both LDR and HDR support for ASTC compressed
textures. Only LDR formats are exposed in the
PhysicalDevice's properties, but HDR support can be added
trivially later by adding the HDR formats and exposing
"VK_EXT_texture_compression_astc_hdr".

Pulled from: https://github.com/ARM-software/astc-encoder
Git hash: 81a5e50741b4c8302cf7d78f314a53e44ee68e1f

The astc-encode git repo was added to third-party, with a
few minor modifications:
1) All encoding related code has been ripped out, only
   decoding related code remains
2) Replaced ASTC_CODEC_INTERNAL_ERROR() with UNREACHABLE()
   in a switch statement in astc_color_unquantize.cpp
3) Some functions were using a lot of stack memory, so I
   added a unique_ptr to allocate the same objects on the
   heap, to avoid potential issues.

LDR ASTC is decoded to 8bit unsigned RGBA.
HDR ASTC is decoded to 32b floating point.

Tests: dEQP-VK.*astc*
Bug: b/150130101
Change-Id: I6b03fed6e1f326a95c7aefe9f9a9d0a89cf24428
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41568Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

EGL_ANGLE_iosurface_client_buffer added a new attribute to the config:
EGL_BIND_TO_TEXTURE_TARGET_ANGLE, which needed to be properly exposed
in the EGL frontend.

Bug: chromium:1015454
Change-Id: I58881df18d711ed7974a0a06e53fed42b1f28638
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41709
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

Set squash uploads to false. This should make git cl upload work
properly from SwiftShader for those who prefer that over 'git push'
to a ref.

Bug: None
Change-Id: Ib80fdbd28c2a7a5808ab73ceec8ddb98f8962e0b
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41708Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

For the System V ABI, variadic calls must store the number of floating
point arguments into RAX. This was mostly working by accident for
our calls to printf since RAX is used as a scratch register, and was
often non-zero, which is all that's really needed for printf with float
args to work; however, when RAX would become 0, printf would print the
wrong thing.

Bug: b/149913889
Change-Id: Id4b519c5416927d537fca078109c0dc850f08359
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41668Tested-by: Antonio Maiorano <amaiorano@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

The code in VkPipelineCache was correctly comparing all the attributes
of the specialization constants and then was also doing a faulty shared
pointer comparison. This was causing major drag on draw calls as every
draw call in ANGLE was recompiling the shader.

Bug: angleproject:4426
Change-Id: Ia0466738eb7de78c0c3b53e61e2f2bc6831bbcca
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41688
Kokoro-Presubmit: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>