Introduce an AST traverser that can move the evaluation of certain
types of loop conditions and loop expressions inside the loop. This
way subsequent AST transformations don't have to worry about cases
where they have to insert new statements to implement a loop condition
or expression.

This includes the revert of "Unfold short-circuiting operators in loop
conditions correctly". The new traverser covers the loop cases that
used to be handled in UnfoldShortCircuitToIf.

BUG=angleproject:1465
TEST=WebGL conformance tests,
     dEQP-GLES2.functional.shaders.*select_iteration_count*

Change-Id: I88e50e007e924d5884a217117690ac7fa2f96d38
Reviewed-on: https://chromium-review.googlesource.com/362570Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

The newly added capability constants are handled in the corresponding
glGet functions. Also, getBooleani_v has been added.

BUG=angleproject:1442

TEST=angle_deqp_gtest_gles31_tests
--gtest_filter=*functional_state_query_integer_max_*
TEST=angle_deqp_gtest_gles31_tests
--gtest_filter=*state_query_indexed_max_compute_work_group_size*
TEST=angle_unittests
TEST=angle_end2end_tests

Change-Id: I846e006307563ae81d8b6c62cf261417e15186c7
Reviewed-on: https://chromium-review.googlesource.com/362270Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

BUG=angleproject:1462

Change-Id: Ifdd714e2bc1f0a184f63f8ef162facce5286e935
Reviewed-on: https://chromium-review.googlesource.com/365233Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

BUG=angleproject:1356

Change-Id: I70246762411dbeeb3e291e317854139a68d80070
Reviewed-on: https://chromium-review.googlesource.com/339434Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:1462

Change-Id: I549692583bbf35edc4e383f8fb7e0dff17c28594
Reviewed-on: https://chromium-review.googlesource.com/365234Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

This will make applications aware of device loss on all EGL calls that
need to have an initialized display. For that purpose, we track the
device loss state at the egl::Display level instead of always querying
the implementation. This is correct because at device-loss at the
display level is non-recoverable. It also deduplicates the tracking
that would have to be done in all the EGL backends.

Changes made in this commit:
 - Cached device loss in egl::Display
 - Check isDeviceLost in ValidateDisplay
 - Changed EGL entry-points testing isDeviceLost to explicitely request
   a testDeviceLost
 - Add calls to ValidateDisplay to entry-points missing it
 - Removed unused virtual qualifiers for some robustness methods

BUG=angleproject:1463

Change-Id: I92bea81f2ecd5423c445cff31557a4d9783557d5
Reviewed-on: https://chromium-review.googlesource.com/365450Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

This special format means we're using a depth/stencil format with only
the stencil channel being used. We can just use a normal D24S8 format
here, there's pretty much no difference.

BUG=angleproject:1455

Change-Id: Id304094b92814f38930209a703733190ad8e8410
Reviewed-on: https://chromium-review.googlesource.com/359086Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

The only difference between the NONRENDERABLE and normal versions of
the formats is the rtvFormat is blank for non-renderable. The only
place that I can see we check rtvFormat to make a decision is in
TextureStorage11::GetTextureBindFlags. The rtvFormat here isn't
necessary because we also check the 'renderTarget' flag, which won't
be true for compressed formats at any time.

BUG=angleproject:1455

Change-Id: Icbb438d336e67b80c44a0ab8de995a32b92e451e
Reviewed-on: https://chromium-review.googlesource.com/359085Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This should make insertion much faster, which will improve the speed
of many BindBuffer calls.

BUG=angleproject:1458

Change-Id: I3f7ebc02cc481257be8b84773506b9ac9e3be677
Reviewed-on: https://chromium-review.googlesource.com/364221Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This saves us looking up the FormatSet repeatedly.

BUG=angleproject:1455

Change-Id: I77890c1eb427e7d087ceaf194a5001b8b03585d4
Reviewed-on: https://chromium-review.googlesource.com/359084Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

BUG=621031

Change-Id: Ib4cdd88ecd58f617813a91379a8b8b518fba149b
Reviewed-on: https://chromium-review.googlesource.com/364910Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

For some nested pow expressions, queueing two node replacements in the
same tree traversal would mangle tree, resulting in invalid code. Fix
this by iterating over the tree until no replacements are found, and
doing one replacement each iteration.

BUG=angleproject:851

Change-Id: Ie08ab23f4bfe3d5f32726856afc61ff1f3d6c789
Reviewed-on: https://chromium-review.googlesource.com/365400Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:1298

Change-Id: Ibfbad8eb8ec824e377d8c1746a6691d6b689f498
Reviewed-on: https://chromium-review.googlesource.com/362601Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Entry points were generated using scripts which take the
new function declarations from gl31.h, find the newly added functions
and output the new function declarations and defitions.

BUG=angleproject:1442
TEST=angle_unittests

Change-Id: I2d77eb4cc24873a31cb2745b7b82bf611d5058c6
Reviewed-on: https://chromium-review.googlesource.com/361291Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

BUG=angleproject:851

Change-Id: I50c3b3a4f00b27fed85f09509738513a441c7b5b
Reviewed-on: https://chromium-review.googlesource.com/363990Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This is a simpler and more portable design. Thanks for Austin from MS.

BUG=angleproject:1452

Change-Id: I93e8f3fc61107f13c4b2c1cf7fbaf2bb7ccdfafb
Reviewed-on: https://chromium-review.googlesource.com/363041Reviewed-by: Austin Kinross <aukinros@microsoft.com>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Entry points were outside of the extern C block.

Change-Id: Ifbd159c59b850a90f728db9027c485661aa96bc8
Reviewed-on: https://chromium-review.googlesource.com/361720Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

ANGLE D3D11 uses a geometry shader to expand points into quads.
This led to an edge case with gl_PointCoord. When the user references
gl_PointCoord in the fragment shader but renders with GL_TRIANGLES or
other non-point primitives, gl_PointCoord is undefined, but ANGLE
would produce a link error. This would break some very odd edge-case
shaders (e.g. a shader that is used with both points and triangles).

We can fix this by simply adding a dummy PointCoord value to our
vertex shader is all cases. If the user renders points, we ignore the
PointCoord value passed to the geometry shader. If they render tris
or lines and use PointCoord, the shader signatures will match, and
PointCoord will even have a sane value of (0.5, 0.5).

BUG=angleproject:1380

Change-Id: I322155cd3801d0241cabc9bb639a5aaa502831b3
Reviewed-on: https://chromium-review.googlesource.com/362779
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>

Since the newer driver versions are required for WebGL 2 conformance,
we need a solution that can detect a driver version to know if we
should apply the workaround.

Use a modified copy of Chrome's Windows GPU driver detection code.
In the future we should extend this to a full module when we port
the command buffer workarounds.

BUG=angleproject:1452

Change-Id: I783d5726454671cc22585a2bf990c071d539aa9f
Reviewed-on: https://chromium-review.googlesource.com/361962Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:851

Change-Id: I68a47b8343a29e42c0a69ca3f2a6cb5054d03782
Reviewed-on: https://chromium-review.googlesource.com/362775Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This one was in a different blit function.

BUG=angleproject:1246

Change-Id: Ib571c10ddc30b3293f5c0d6bdb357b4cd3b52579
Reviewed-on: https://chromium-review.googlesource.com/362774Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>

This introduced a flaky failure to the multisample resolve blit tests.
They would work sometimes if the state had set the correct viewport
previously, so it wasn't always evident there was a bug.

BUG=angleproject:1246

Change-Id: If16d574fb87484fcdc9b7cc6ecc0531ee4a8959d
Reviewed-on: https://chromium-review.googlesource.com/362699Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>

If the GL_EXT_draw_buffers extension isn't explicitly enabled in the shader,
then gl_FragData is an array of size 1, not of size max_draw_buffers.

BUG=angleproject:1441
TEST=webgl2_conformance with --use-gl=angle

Change-Id: I2ead1457462bf1f396fda1f47022df6b54612e17
Reviewed-on: https://chromium-review.googlesource.com/362781Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>

Introduced in https://chromium-review.googlesource.com/362641
Eventually we'll switch to using the same sets of warnings
for standalone and GN ANGLE.

BUG=angleproject:1441

Change-Id: I6534b9f85b952ddf1d953342cf9c8ddc5de6614e
Reviewed-on: https://chromium-review.googlesource.com/362780Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Now that we preserve the sized-ness information, we can validate
CopyTexSubImage and related methods correctly.

Fixed a lot of WebGL 2 tests when using ANGLE.

BUG=angleproject:1228

Change-Id: I959322c0a9bb16a2f16d60dce7cd1e63ca95b45a
Reviewed-on: https://chromium-review.googlesource.com/362618Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This has a few advantages: it preserves all the information of the
internal format, such as if it is sized or unsized. It also saves
looking up the format multiple times in the table, which should
improve speed in some cases.

The extra sized-ness information will allow us to perform the
correct validation in CopyTexSubImage calls.

BUG=angleproject:1228

Change-Id: I42954771b0a9a968f5d787b8cf6e0af721791855
Reviewed-on: https://chromium-review.googlesource.com/362626Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:1441
TEST=webgl2 conformance

Change-Id: Idb27036347e1e814ba4603969cc2065e425ac4aa
Reviewed-on: https://chromium-review.googlesource.com/362641Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

It's allowed to not have all code paths return a value in ESSL but the HLSL
compiler detects this and generates an error.  Work around this by adding
dummy return statements at the end of each function that doesn't have one.

TEST=deqp/data/gles2/shaders/functions.html

BUG=angleproject:1015
BUG=478572

Change-Id: I2913f90f0994d4caf25cc43b16b9fc4e9efb19a5
Reviewed-on: https://chromium-review.googlesource.com/362085Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

These were missing and are in the spec.

BUG=angleproject:1228

Change-Id: Ife9d311e76662d467d06b7aec4e674f9699b3573
Reviewed-on: https://chromium-review.googlesource.com/362624Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This was stored as DEPTH_STENCIL when it should be STENCIL.

BUG=angleproject:1228

Change-Id: I34c226a273cf962e83a040630bedbefa0f9ee382
Reviewed-on: https://chromium-review.googlesource.com/362623Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This should no longer needed after http://crrev.com/d805a40eb7b1ef6b

BUG=chromium:630299

Change-Id: I2f78a922d873cf1b5809b3454cb0b72267261b97
Reviewed-on: https://chromium-review.googlesource.com/362295Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Fix this by producing an error on undefined or negative shifts.

BUG=629518

Change-Id: Idfca5ed3fc8e557f6178408f3426a5ef2ce7cf14
Reviewed-on: https://chromium-review.googlesource.com/362020Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

The patch for initializing output variables introduced a warning that
broke MSVS 2015 standalone build. The "shaderType" variable passed to
TCompiler::initializeOutputVariables was unnecessary and had the same
name as a member variable of TCompiler that stores the shader type.

TEST=MSVS 2015 build

Change-Id: I9e01f5eae77a88babde21d4864a02c8731a220de
Reviewed-on: https://chromium-review.googlesource.com/362550Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

BUG=angleproject:1441
TEST=bots

Change-Id: Ia4cf415d8346c3234bf0f548a178ee3ea8cd35c4
Reviewed-on: https://chromium-review.googlesource.com/362110Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>

BUG=angleproject:1298

Change-Id: I32750d5d81c14fe5a17634586cddf117f0a4e692
Reviewed-on: https://chromium-review.googlesource.com/362157Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Vectors or matrices that are dynamically indexed as a part of an
l-value generate new statements in the RemoveDynamicIndexing AST
transformation step. SplitSequenceOperator needs to detect this case
and split the sequence operator before statements are generated from
its operands to ensure the correct order of execution.

BUG=angleproject:1341
TEST=angle_end2end_tests

Change-Id: I84e41a59c88fb5d0111669cab60312b930531a22
Reviewed-on: https://chromium-review.googlesource.com/361695Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Split sequence operators if some of their operands generate statements
in subsequent AST transformations to guarantee the right order of
execution. For now, this is supported for expressions that return
arrays and unfolded short-circuiting operators, which is enough to get
WebGL 2 tests passing. A trickier corner case with dynamic indexing of
vectors as an l-value is left to be addressed later.

BUG=angleproject:1341
TEST=angle_end2end_tests, WebGL 2 conformance test:
     conformance2/glsl3/array-in-complex-expression.html

Change-Id: I9301edd3366be7607a8aa4c42a5ec13928749e10
Reviewed-on: https://chromium-review.googlesource.com/361694Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

The ANGLETest::TearDown() call was set at the beginning of the
function where as it should be at the end since it destroys the
context. The earlier version would not cause any crashes because the
GL function calls would be ignored.

BUG=angleproject:1445

TEST=angle_end2end_tests

Change-Id: I187cb8fede1db4ef2bfc13ab850594c41e00b0b0
Reviewed-on: https://chromium-review.googlesource.com/362220Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

This will enable sharing code between different AST traversers that
apply transformations on similar node structures. This will make the
code more maintainable.

For now the helper class is used in UnfoldShortCircuitToIf and
SeparateExpressionsReturningArrays.

BUG=angleproject:1341
TEST=angle_end2end_tests, WebGL 2 conformance tests

Change-Id: Ib1e0d5a84fd05bcca983b34f18d47c53e86dc227
Reviewed-on: https://chromium-review.googlesource.com/361693Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

The previous logic of only checking the currently enabled draw buffers was
incorrect.  Also updated the logic to be more lenient and allow multiple
slices or mips of the same texture.

BUG=483282

Change-Id: I0d406d1a9a96e48342baefbaf11e0c2ecc6d390c
Reviewed-on: https://chromium-review.googlesource.com/361533Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>