Commit graph

2780 commits

Author SHA1 Message Date
Ian Romanick
6b03b345eb glsl: Add "built-in" function for 64-bit integer sign()
These functions are directly available in shaders.  A #define is added
to detect the presence.  This allows these functions to be tested using
piglit regardless of whether the driver uses them for lowering.  The
GLSL spec says that functions and macros beginning with __ are reserved
for use by the implementation... hey, that's us!

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Ian Romanick
6c3af04363 glsl: Add a lowering pass for 64-bit integer multiplication
v2: Rename lower_64bit.cpp and lower_64bit_test.cpp to lower_int64.
Suggested by Matt.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Ian Romanick
330fc2413c glsl: Add "built-in" functions to do 64x64 => 64 multiplication
These functions are directly available in shaders.  A #define is added
to detect the presence.  This allows these functions to be tested using
piglit regardless of whether the driver uses them for lowering.  The
GLSL spec says that functions and macros beginning with __ are reserved
for use by the implementation... hey, that's us!

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Ian Romanick
aa38bf1e59 glsl: Move builtin_function related prototypes to a separate file
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Ian Romanick
8358e58f25 glsl/standalone: Enable ARB_gpu_shader_int64
v2: Add missing break in GLSL_TYPE_INT64 case.  Notice by Matt.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Ian Romanick
f82ced5af3 glsl: Allow GLSL_TYPE_INT64 for ir_unop_abs and ir_unop_sign
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Ian Romanick
8e7e1ae036 glsl: Print GLSL_TYPE_UINT64 and GLSL_TYPE_INT64 values
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Ian Romanick
0d14fec345 glsl: Add interaction between ARB_gpu_shader_int64 and ARB_shader_clock
If ARB_gpu_shader_int64 is supported, ARB_shader_clock also adds
clockARB() that returns a uint64_t.  Rather than add new opcodes and
intrinsics for this, just wrap the existing intrinsic with a
packUint2x32.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
bfc4080d38 glsl: Add 64-bit integer functions
These are all the allowed 64-bit functions from ARB_gpu_shader_int64
spec.

v2: restrict int64/double functions better.

v3 (idr): Delete spurious blank lines.  Suggested by Matt.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
050f38ef0b glsl/varying_packing: Add 64-bit integer support
As for the double code, but using the 64-bit integer conversions.

v2 (idr): Remove some spurious u2i() and i2u() operations when packing
and unpacking, respectively, int64_t varyings.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> [v1]
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
923aebdd46 glsl/ast: Add 64-bit integer support in some places.
Just add support in two more places in ast parsing.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
9ba9a7f854 glsl: Add 64-bit integer support to some operations.
This adds 64-bit integer support to some AST and IR operations where
it is needed.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
25c7a61b28 glsl/ir_builder: Add support for some 64-bit bitcasts.
We need builder support to implement some of the builtins.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
78cc44280e glsl/ast: Add 64-bit integer support to conversion functions
This adds support to call the new operations on conversions.

v2 (idr): Delete an unnecessary break-statement.  Noticed by Matt.  Add
a missing blank line.  Noticed by Ian.

v3 (idr): "cut them down later" => Remove ir_unop_b2u64 and
ir_unop_u642b.  Handle these with extra i2u or u2i casts just like
uint(bool) and bool(uint) conversion is done.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> [v1]
Reviewed-by: Matt Turner <mattst88@gmail.com> [v2]
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
85faf5082f glsl: Add 64-bit integer support for constant expressions
This just adds the new operations and add 64-bit integer support to all
the existing cases where it is needed.

v2: fix some issues found in testing.
v2.1: add unreachable (Ian), add missing int/uint pack/unpack (Dave).

v3 (idr): Rebase on top of idr's series to generate
ir_expression_operation_constant.h. In addition, this version:

    Adds missing support for ir_unop_bit_not, ir_binop_all_equal,
    ir_binop_any_nequal, ir_binop_vector_extract,
    ir_triop_vector_insert, and ir_quadop_vector.

    Removes support for uint64_t from ir_unop_abs and ir_unop_sign.

v4 (idr): "cut them down later" => Remove ir_unop_b2u64 and
ir_unop_u642b.  Handle these with extra i2u or u2i casts just like
uint(bool) and bool(uint) conversion is done.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> [v2]
Reviewed-by: Matt Turner <mattst88@gmail.com> [v3]
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
a68b6ee063 glsl/ir: Add support for 64-bit integer conversions.
This adds all the conversions in the world, I'm not 100% sure of all of
these are needed, but add all of them and we can cut them down later.

v2: fix issue with packing output types.

v3 (idr): Rebase on top of idr's series to generate
ir_expression_operation_constant.h.  Fix transposed ir_validate
assertions for ir_unop_u642i64 and ir_unop_i642u64.  Add missing
automatic type setup for ir_unop_u642i64 and ir_unop_i642u64.

v4 (idr): "cut them down later" => Remove ir_unop_b2u64 and
ir_unop_u642b.  Handle these with extra i2u or u2i casts just like
uint(bool) and bool(uint) conversion is done.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> [v2]
Reviewed-by: Matt Turner <mattst88@gmail.com> [v3]
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
7dd63c10c3 glsl: Add 64-bit integer support to uniform initialiser code
Just add support to the double case, same code should work.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
8df5287c23 glsl/varyings: Add 64-bit integer support.
This adds 64-bit ints to the link_varyings 64-bit support.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
bbce1c538d glsl/ast/ir: Add 64-bit integer constant support
This adds support for 64-bit integer constants to the parser,
ast and ir.

v2: fix a few issues found in testing.

v3: Add missing ir_constant copy contructor support.

v4: Use PRIu64 and PRId64 in printfs in glsl_parser_extras.cpp.
Suggested by Nicolai.  Rebase on Marek's linalloc changes.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> [v2]
Reviewed-by: Matt Turner <mattst88@gmail.com> [v3]
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
8ce53d4a2f glsl: Add basic ARB_gpu_shader_int64 types
This adds the builtins and the lexer support.

To avoid too many warnings, it adds basic support to the type in a few
other places in mesa, mostly in the trivial places.

It also adds a query to be used later for if a type is an integer 32 or 64.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Dave Airlie
e90830bb8e glsl: Add ARB_gpu_shader_int64 boilerplate.
This just adds the basic boilerplate support.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-20 15:41:23 -08:00
Lionel Landwerlin
8a28e764d0 spirv: don't assert with location decorations on non i/o variables
Some applications might add location decoration to samplers. Rather
than raising an error it seems it would make more sense to just
discard these decorations.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Cc: 17.0 <mesa-stable@lists.freedesktop.org>
2017-01-20 21:39:46 +00:00
Lionel Landwerlin
0c3d058723 spirv: fix warn string typo
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2017-01-20 16:46:29 +00:00
Elie TOURNIER
9fdaeb7776 nir: add min/max optimisation
Add the following optimisations:

min(x, -x) = -abs(x)
min(x, -abs(x)) = -abs(x)
min(x, abs(x)) = x
max(x, -abs(x)) = x
max(x, abs(x)) = abs(x)
max(x, -x) = abs(x)

shader-db:

total instructions in shared programs: 13067779 -> 13067775 (-0.00%)
instructions in affected programs: 249 -> 245 (-1.61%)
helped: 4
HURT: 0

total cycles in shared programs: 252054838 -> 252054806 (-0.00%)
cycles in affected programs: 504 -> 472 (-6.35%)
helped: 2
HURT: 0

Signed-off-by: Elie Tournier <tournier.elie@gmail.com>
Reviewed-by: Plamena Manolova <plamena.manolova@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2017-01-19 21:44:28 -08:00
Jason Ekstrand
f22ee14644 nir/algebraic: Only include nir_search_helpers once
We were including it once per value, so probably around 10k times.
Let's not cause the compiler any more work than we have to.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
2017-01-19 21:40:30 -08:00
Timothy Arceri
4d65f68a9b mesa/glsl: move TransformFeedbackBufferStride to gl_shader
Here we remove the single use of this field in gl_linked_shader
which allows us to move the field out of gl_shader_info

While we are at it we rewrite link_xfb_stride_layout_qualifiers()
to be more clear.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
e603cf1841 glsl: exit loop early if we find xfb layout qualifers
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
7983ed5f65 glsl: set InnerCoverage directly in gl_program
Also move out of the shared gl_shader_info.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
1f141eaef6 glsl: tidy up PostDepthCoverage shader field
There is no reason for this to be in the shared gl_shader_info or
to copy it to gl_program at the end of linking (its already there).

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
3d41f4b990 mesa/glsl: move pixel_center_integer to gl_shader
This is only used by gl_linked_shader as a temp during linking
so use a temp there instead.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
0a9d102ddc mesa/glsl: move origin_upper_left to gl_shader
This is only used by gl_linked_shader as a temp during linking
so use a temp there instead.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
ceeedb9bb0 mesa/glsl: move uses_gl_fragcoord to gl_shader
This is only used by gl_linked_shader as a temp during linking
so use a temp there instead.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
66a6050ad8 mesa/glsl: move redeclares_gl_fragcoord to gl_shader
This is never used in gl_linked_shader other than as a temp
during linking so just use a temp instead.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
cc7ecce253 mesa/glsl: move ARB_fragment_coord_conventions_enable field
This is only used by gl_shader not gl_linked_shader so move it
there.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
ae28c5a60c st/mesa/glsl: set early_fragment_tests directly in shader_info
We also move EarlyFragmentTests out of the gl_shader_info struct
as it is now only used by gl_shader.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
5c93d27423 mesa/glsl/i965: set and use tcs vertices_out directly
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 17:05:26 +11:00
Timothy Arceri
90d950038f mesa/glsl: move ProgramResourceList to gl_shader_program_data
We also move NumProgramResourceList at the same time.

GLES does interface validation on SSO at runtime so we need to move
this to be able to switch to storing gl_program pointers in
CurrentProgram.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2017-01-19 15:55:02 +11:00
Timothy Arceri
62f718bfcb glsl: store number of explicit uniform loactions in gl_shader_program
This allows us to cleanup the functions that pass this count around,
but more importantly we will be able to call the uniform linking
functions from that backends linker without having to pass this
information to the backend directly via Driver.LinkShader().

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2017-01-19 15:55:02 +11:00
Timothy Arceri
c054bbf0d4 glsl: create a new link_and_validate_uniforms() helper
Currently this just breaks up the linking code a bit but in the
future i965 will call this from the backend via Driver.LinkShader()
so that we can do NIR optimisations before assigning uniform
locations.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2017-01-19 15:55:02 +11:00
Timothy Arceri
ce4fb3c8a1 glsl: make a bunch of varying linking functions static
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2017-01-19 15:55:02 +11:00
Timothy Arceri
90fffd1770 glsl: move more varying linking code to link_varyings.cpp
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2017-01-19 15:55:02 +11:00
Emil Velikov
9f8dc3bf03 utils: build sha1/disk cache only with Android/Autoconf
Earlier commit imported a SHA1 implementation and relaxed the SHA1 and
disk cache handling, broking the Windows builds.

Restrict things for now until we get to a proper fix.

Fixes: d1efa09d34 "util: import sha1 implementation from OpenBSD"
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
2017-01-18 20:09:01 +00:00
Emil Velikov
d1efa09d34 util: import sha1 implementation from OpenBSD
At the moment we support 5+ different implementations each with varying
amount of bugs - from thread safely problems [1], to outright broken
implementation(s) [2]

In order to accommodate these we have 150+ lines of configure script and
extra two configure toggles. Whist an actual implementation being
~200loc and our current compat wrapping ~250.

Let's not forget that different people use different code paths, thus
effectively makes it harder to test and debug since the default
implementation is automatically detected.

To minimise all these lovely experiences, import the "100% Public
Domain" OpenBSD sha1 implementation. Clearly document any changes needed
to get building correctly, since many/most of those can be upstreamed
making future syncs easier.

As an added bonus this will avoid all the 'fun' experiences trying to
integrate it with the Android and SCons builds.

v2: Manually expand __BEGIN_DECLS/__END_DECLS and document (Tapani).

Furthermore it seems that some games (or surrounding runtime) static
link against OpenSSL resulting in conflicts. For more information see
the discussion thread [3]

Bugzilla [1]: https://bugs.freedesktop.org/show_bug.cgi?id=94904
Bugzilla [2]: https://bugs.freedesktop.org/show_bug.cgi?id=97967
[3] https://lists.freedesktop.org/archives/mesa-dev/2017-January/140748.html
Cc: Mark Janes <mark.a.janes@intel.com>
Cc: Vinson Lee <vlee@freedesktop.org>
Cc: Tapani Pälli <tapani.palli@intel.com>
Cc: Jonathan Gray <jsg@jsg.id.au>
Tested-by: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Tapani Pälli <tapani.palli@intel.com> (v1)
Acked-by: Jason Ekstrand <jason@jlekstrand.net> (v1)
2017-01-18 19:07:23 +00:00
Kenneth Graunke
e7d4008ebf glsl: Make copy propagation not panic when it sees an intrinsic.
A number of games have large arrays of constants, which we promote to
uniforms.  This introduces copies from the uniform array to the original
temporary array.  Normally, copy propagation eliminates those copies,
making everything refer to the uniform array directly.

A number of shaders in "Deus Ex: Mankind Divided" recently exposed a
limitation of copy propagation - if we had any intrinsics (i.e. image
access in a compute shader), we weren't able to get rid of these copies.

That meant that any variable indexing remained on the temporary array
rather being moved to the uniform array.  i965's scalar backend
currently doesn't support indirect addressing of temporary arrays,
which meant lowering it to if-ladders.  This was horrible.

According to Marek, on radeonsi/GCN, "F1 2015" uses 64% less
spilled-temp-array memory.

On i965/Skylake:

total instructions in shared programs: 13362954 -> 13329878 (-0.25%)
instructions in affected programs: 43745 -> 10669 (-75.61%)
helped: 12
HURT: 0

total cycles in shared programs: 248081010 -> 245949178 (-0.86%)
cycles in affected programs: 4597930 -> 2466098 (-46.37%)
helped: 12
HURT: 0

total spills in shared programs: 9493 -> 9507 (0.15%)
spills in affected programs: 25 -> 39 (56.00%)
helped: 0
HURT: 1

total fills in shared programs: 12127 -> 12197 (0.58%)
fills in affected programs: 110 -> 180 (63.64%)
helped: 0
HURT: 1

Helps Deus Ex: Mankind Divided.   The one shader with hurt spills/fills
is from Tomb Raider at Ultra settings, but that same shader has a
-39.55% reduction in instructions and -14.09% reduction in cycle counts,
so it seems like a win there as well.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-17 21:45:22 -08:00
Ilia Mirkin
2dd4cdeb4e glsl: avoid treating fb fetches as output reads to be lowered
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
2017-01-16 21:13:08 -05:00
Connor Abbott
c9b74f3f03 nir/gcm: fix a bug with metadata handling
We were using impl->num_blocks, but that isn't guaranteed to be
up-to-date until after the block_index metadata is required. If we were
unlucky, this could lead to overwriting memory.

Noticed by inspection.

Signed-off-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2017-01-14 18:18:17 -05:00
Timothy Arceri
772cd31048 nir: optimise min/max fadd combos
shader-db results BDW:

total instructions in shared programs: 13060410 -> 13060313 (-0.00%)
instructions in affected programs: 24533 -> 24436 (-0.40%)
helped: 88
HURT: 0

total cycles in shared programs: 256585692 -> 256586698 (0.00%)
cycles in affected programs: 647290 -> 648296 (0.16%)
helped: 35
HURT: 30

Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-14 23:26:22 +11:00
Jason Ekstrand
08eced3cfd nir/gcm: Fix a typo in a comment
Reported-by: Matt Turner <mattst88@gmail.com>
2017-01-12 14:56:55 -08:00
Jason Ekstrand
087e172179 nir/gcm: Rework the schedule late loop
This fixes a bug in code motion that occurred when the best block is the
same as the schedule early block.  In this case, because we're checking
(lca != def->parent_instr->block) at the top of the loop, we never get to
the check for loop depth so we wouldn't move it out of the loop.  This
commit reworks the loop to be a simple for loop up the dominator chain and
we place the (lca != def->parent_instr->block) check at the end of the
loop.

Reviewed-by: Matt Turner <mattst88@gmail.com>
2017-01-12 14:56:55 -08:00
Jason Ekstrand
27a1c7ffbd spirv: Handle patch decorations up-front
Once again, SPIR-V is insane... It allows you to place "patch"
decorations on structure members.  Presumably, this is so that you can
do something such as

out struct S {
   layout(location = 0) patch vec4 thing1;
   layout(location = 0) vec4 thing2;
} str;

And have your I/O "nicely" organized.  While this is a bit silly, it's
allowed and well-defined so whatever.  Where it really gets interesting
is when you have an array of struct.  SPIR-V says nothing about not
allowing you to have those qualifiers on the members of a struct that's
inside an array and GLSLang does this.  Specifically, if you have

layout(location = 0) out patch struct S {
   vec4 thing1;
   vec4 thing2;
} str[2];

then GLSLang will place the "patch" decorations on the struct members.
This is ridiculous there is no way that having some of them be patch and
some not would be well-defined given that patch and non-patch outputs
are in effectively different storage classes.  This commit moves around
the way we handle the "patch" decoration so that we can detect even the
crazy cases and handle them.

Fixes: dEQP-VK.tessellation.user_defined_io.per_patch_block_array.*

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2017-01-12 10:41:34 -08:00