Update spirv-tools known-good

Check if _MSC_VER is defined before using.

Fixes compilation errors on some platforms.

build: Don't ship GTEST headers in install target

A project that uses googletest(GTEST) shouldn't include googletest
headers with its artifacts in its install target.  These headers
simply are not needed by the consumers of the install target and
can cause conflicts with other projects that use googletest
themselves and this project's install target.  And they are just not
part of the expected glslang build artifacts.

It is likely that the addition of the googletest headers to the install
target was a simple oversight that happens as a result of adding
googletest as a CMake subdirectory.

For more information on how this causes conflicts with other projects,
please see: https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/821.

Update spirv-tools known-good

Callables shouldn't have incoming ray flags

Enable GL_KHR_shader_subgroup properly

(and GL_NV_shader_subgroup_partitioned) based on GL/ES version
instead of predicating it on vulkan SPV generation

Also add AST testing.
The glsl.450.subgroup* files are largely the same as the spv.subgroup*
The glsl.es320.subgroup* files are the same as the 450 versions, but modified to be ES compatible.

Avoid undefined behaviour

Prior to this change, OES_primitive_bounding_box and EXT_primitive_bounding_box were both recognised as extensions, but only the name gl_BoundingBoxOES could be used. However the EXT version uses the name gl_BoundingBoxEXT instead. In addition, since GLES 3.2, the extension has been included in the core standard and the name gl_BoundingBox may be used instead. This change aims to make both extensions and the 3.2 core version all work.

Suppress MSVC warning about unused variable.

Avoid running the validator as part of the optimization pass.

One variable was only used in an 'assert' call. MSVC flagged this
as unused in Release. Suppress the warning and also add a static
cast to void so the variable becomes referenced.

The spvtools::Optimizer::Run method glslang is using constructs a default set
of spvtools::OptimizerOptions. This default set of options instructs the
validator to run. That is not quite correct since glslang will invoke the
validator _explicitly_ after the optimization pass.

Change-Id: I30f458304c6e7f81e89fc4ebd25eabbbd8348063

Error out writes to shaderRecordNV buffer blocks.

Update SPIRV-Tools and Headers

Also mark spv.subgroupPartitioned as passing validation.

GN: Make glslang_validator an executable.

The target was accidentally listed as a source_set.

Move getBufferReferenceAlignment to be a method of TType

Improved fix for buffer reference constants

This is a better place for it logically, since it is not specific to
glsl->spirv translation. And in a future change I want to use it outside
of glslangtospv.

This is an alternate fix for the issue described in commit be63facd, whose
solution didn't work if there were non-trivial operations involved in computing
a constant initializer which caused the 'constant unfolding' code to kick in
(addConstantReferenceConversion). Instead, this change does the 'unfolding'
later in createSpvConstantFromConstUnionArray. If a reference-type constant has
survived that long, then folding is already done, this must be a 'real' (inside
a function) use of the constant, and it should be safe to unfold and apply the
bitcast.

Fix interactions between 'volatile' and the Vulkan memory model

Last year we changed 'volatile' to also act as 'coherent', but when I
resolved the memory model changes against that change I missed handling
volatile in a couple places that we check for coherent. There was also
a place in post-processing that acted as if the volatile memory access
flag has a literal number associated with it, when it doesn't.

Handle buffer references vs 'const'

Allow constructors to and from references to be constant folded. Section 4.3.3
says constructors whose arguments are all constant expressions must fold.

Disallow 'const' on buffer reference types. It is not a 'non-void transparent
basic data type' (it is not considered 'basic').

Handle buffer reference constants (which can be assigned to a non-const reference,
or can be further folded to another type of constant) by converting to
'constructor(uint64_t constant)' in addConversion.

Disallow == and != operators on reference types.

Fix NV_EXTENSIONS-disabled build

Implement GL_NV_cooperative_matrix