Splitting the file into two strings in shader_translator complicated
testing line/file numbering related functionality with it, since each
chunk passed to ShCompile has its own file number and line numbering.
These are exposed to the preprocessor in __FILE__ and __LINE__ predefined
macros.

Just supply the file to ShCompile in a single string. Also, since the
original motivation for splitting the string seems to have been to
exercise ShCompile with multiple strings, add a new unit test that
ensures that ShCompile handles multiple strings as expected.

BUG=angleproject:989
TEST=angle_unittests

Change-Id: I31d24925ec85ca3411e537df25a985f09737403e
Reviewed-on: https://chromium-review.googlesource.com/297251Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>

Failes the gles2_conform_test:

GLES2ConformTest.GL2Tests_glGetUniform_input_run

Possibly also WebGL failures, will investigate.

BUG=angleproject:1123

This reverts commit 10750cb9.

Change-Id: I1ae59325e1831589019bc5a27ffc2091d3994a65
Reviewed-on: https://chromium-review.googlesource.com/298200Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

This data was previously stored entirely in the Impl level. Move
as much as possible to the GL level, using a read-only view in the
Impl level. Some information in D3D-specific, and should be stored
separately in the Impl.

This patch has a lot of refactoring that splits the D3D and GL info,
and moves as much validation as possible to the GL layer, where it
is shared between the back-ends.

Re-land with fix for dEQP unused uniforms. The fix involves storing
a local copy of all uniform data in the GL layer. This will also
let us validate sampler indexes during draw calls at the GL layer.

Re-re-land with a fix for multiply defined symbols on Clang.

BUG=angleproject:1123
TEST=end2end_tests,Canary WebGL (D3D11/GL), dEQP-GLES2+3.functional.uniform_api

Change-Id: I7b55e4964fbe64e0106c37928c894146937a2476
Reviewed-on: https://chromium-review.googlesource.com/298110Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Problems with multiply defined symbols in the Linux builder.

BUG=angleproject:1123

This reverts commit ff1abe63.

Change-Id: Ifcb2ad885d0841c128ffd69afb6594e37eba17fc
Reviewed-on: https://chromium-review.googlesource.com/298100Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

This data was previously stored entirely in the Impl level. Move
as much as possible to the GL level, using a read-only view in the
Impl level. Some information in D3D-specific, and should be stored
separately in the Impl.

This patch has a lot of refactoring that splits the D3D and GL info,
and moves as much validation as possible to the GL layer, where it
is shared between the back-ends.

Re-land with fix for dEQP unused uniforms. The fix involves storing
a local copy of all uniform data in the GL layer. This will also
let us validate sampler indexes during draw calls at the GL layer.

BUG=angleproject:1123
TEST=end2end_tests,Canary WebGL (D3D11/GL), dEQP-GLES2+3.functional.uniform_api

Change-Id: I9074c057c2c67d4d3221ec11c5556a26e07c7ceb
Reviewed-on: https://chromium-review.googlesource.com/297070
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Cubemap filtering is supposed to be seamless for ES3+ contexts.

Fixes 298 failures in dEQP-GLES3.functional.texture, mostly in
dEQP-GLES3.functional.texture.filtering and
dEQP-GLES3.functional.texture.shadow.

BUG=angleproject:986
BUG=angleproject:1149

Change-Id: I6054365086bb3b9d9b085c260f88e2c43eb75bfe
Reviewed-on: https://chromium-review.googlesource.com/296966Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

Change-Id: Iee1d327a03469d7daf6cc412709c0a36e1c83e32
Reviewed-on: https://chromium-review.googlesource.com/296721Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Cooper Partin <coopp@microsoft.com>
Tryjob-Request: Jamie Madill <jmadill@chromium.org>

This replace the non-descriptive digit at the end of the test name by
the name of the configuration being tested.

Reland with a fix for gtest initialization on Windows caused by
ProgramBinaryTest having the same parameter name twice.

BUG=angleproject:1153

Change-Id: I9b0f661a535b760793d9d87ef0c8298f6b83830d
Reviewed-on: https://chromium-review.googlesource.com/297701Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

dEQP-GLES3.functional.fbo.color.tex3d.rgb10_a2ui was already failing but
because the framebuffer was marked as unsupported, dEQP considers the test to
be passing.

BUG=angleproject:1149
BUG=angleproject:1097

Change-Id: I82223e8e927d1fd6d66f75b5fdea7989c92d706d
Reviewed-on: https://chromium-review.googlesource.com/298031Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

Resubmit with clang build issue fixed. The result of a short-circuited
operation is now either 0 or 1.

ESSL 3.00 spec section 3.4 mentions that the second operand in a logical
&& or || preprocessor operation is evaluated only if the first operand
doesn't short-circuit the expression. The non-evaluated part of a
preprocessor expression may also have undefined identifiers.

Make the expression parser follow the spec by ignoring errors that are
generated inside short-circuited expressions. This includes undefined
identifiers and divide by zero.

BUG=angleproject:347
TEST=dEQP-GLES3.functional.shaders.preprocessor.undefined_identifiers.*
     angle_unittests

Change-Id: I4163f96ec46d40ac859ffb39d91b89490041e44d
Reviewed-on: https://chromium-review.googlesource.com/297252Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Build break on Clang:

FAILED: /b/build/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/third_party/angle/src/compiler/preprocessor/preprocessor.ExpressionParser.o.d -DV8_DEPRECATION_WARNINGS -DCLD_VERSION=2 -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DCHROMIUM_BUILD -DCR_CLANG_REVISION=245965-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_ONE_CLICK_SIGNIN -DENABLE_PRE_SYNC_BACKUP -DENABLE_WEBRTC=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_CONFIGURATION_POLICY -DENABLE_NOTIFICATIONS -DENABLE_HIDPI=1 -DSYSTEM_NATIVELY_SIGNALS_MEMORY_PRESSURE -DDONT_EMBED_BUILD_METADATA -DDCHECK_ALWAYS_ON=1 -DFIELDTRIAL_TESTING_ENABLED -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_AUTOFILL_DIALOG=1 -DENABLE_BACKGROUND=1 -DENABLE_GOOGLE_NOW=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_APP_LIST=1 -DENABLE_SETTINGS_APP=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DENABLE_WIFI_BOOTSTRAPPING=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DSAFE_BROWSING_SERVICE -DUSE_LIBPCI=1 -DUSE_OPENSSL=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -Igen -isysroot /Applications/Xcode5.1.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -O2 -gdwarf-2 -fvisibility=hidden -Werror -Wnewline-eof -mmacosx-version-min=10.6 -arch x86_64 -Wendif-labels -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-unused-function -Wno-unused-variable -std=c++11 -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -fno-threadsafe-statics -Xclang -load -Xclang /b/build/slave/GPU_Mac_Builder/build/src/third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.dylib -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang check-templates -fcolor-diagnostics -fno-strict-aliasing  -c ../../third_party/angle/src/compiler/preprocessor/ExpressionParser.cpp -o obj/third_party/angle/src/compiler/preprocessor/preprocessor.ExpressionParser.o
../../third_party/angle/src/compiler/preprocessor/ExpressionParser.cpp:1372:35: error: use of logical '||' with constant operand [-Werror,-Wconstant-logical-operand]
            (yyval) = (yyvsp[-3]) || 0;
                                  ^  ~
../../third_party/angle/src/compiler/preprocessor/ExpressionParser.cpp:1372:35: note: use '|' for a bitwise operation
            (yyval) = (yyvsp[-3]) || 0;
                                  ^~
                                  |
../../third_party/angle/src/compiler/preprocessor/ExpressionParser.cpp:1406:35: error: use of logical '&&' with constant operand [-Werror,-Wconstant-logical-operand]
            (yyval) = (yyvsp[-3]) && 0;
                                  ^  ~
../../third_party/angle/src/compiler/preprocessor/ExpressionParser.cpp:1406:35: note: use '&' for a bitwise operation
            (yyval) = (yyvsp[-3]) && 0;
                                  ^~
                                  &
../../third_party/angle/src/compiler/preprocessor/ExpressionParser.cpp:1406:35: note: remove constant to silence this warning
            (yyval) = (yyvsp[-3]) && 0;
                                 ~^~~~

BUG=angleproject:347

This reverts commit 6ffe6135.

Change-Id: I6d81666cca573f320bfb1164a6c794b6f75f7463
Reviewed-on: https://chromium-review.googlesource.com/298020Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Fails the dEQP test:

dEQP-GLES3.functional.fbo.color.tex3d.rgb10_a2ui

BUG=angleproject:1149

This reverts commit d0f9fdc7.

Change-Id: I5b76255be3fc1f0734395dac609e2949fc8c8185
Reviewed-on: https://chromium-review.googlesource.com/298010Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

ESSL 3.00 spec section 3.4 mentions that the second operand in a logical
&& or || preprocessor operation is evaluated only if the first operand
doesn't short-circuit the expression. The non-evaluated part of a
preprocessor expression may also have undefined identifiers.

Make the expression parser follow the spec by ignoring errors that are
generated inside short-circuited expressions. This includes undefined
identifiers and divide by zero.

BUG=angleproject:347
TEST=dEQP-GLES3.functional.shaders.preprocessor.undefined_identifiers.*
     angle_unittests

Change-Id: Ieed02a71298af838f784a5d1197d4f4a9ba0e3c8
Reviewed-on: https://chromium-review.googlesource.com/295033Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

This test exposes a driver bug in state query, where the AMD
driver does not cast state values correctly. Suppress this for now
but we can quickly turn it on with the Uniforms refactor, which
does all of the necessary state retrieval within ANGLE without
consulting the driver.

BUG=angleproject:1123

Change-Id: I5c1f1c16e3a59582267de3365e388ffef4d57467
Reviewed-on: https://chromium-review.googlesource.com/296667Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

The test will help cover a bug that I found when doing the refactor
of gl::Program.

BUG=angleproject:1123

Change-Id: Id353ffaffef83ad1538580ad01668c915bf9853f
Reviewed-on: https://chromium-review.googlesource.com/297031Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

This reverts commit 0db7b155.

BUG=

Change-Id: Ia2de8268bd51d865ad87875c55cb5bfcc51e29f6
Reviewed-on: https://chromium-review.googlesource.com/297760Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

BUG=angleproject:1149

Change-Id: I5dd45c99b373d480814c9fbdbe0abd419a270c89
Reviewed-on: https://chromium-review.googlesource.com/297052Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

Causes crashes in the dEQP ReadPixels test.

BUG=angleproject:1149
BUG=angleproject:883

Change-Id: I090e21ebd7781ce3372b8842421e7da3e4bedbac
Reviewed-on: https://chromium-review.googlesource.com/287629Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

This ensures that the PBO is bound because it does not have a dirty bit
yet.

BUG=angleproject:1149
BUG=angleproject:885

Change-Id: Iad96abc4dec4e6ac8187975c7638dfd7f18951e7
Reviewed-on: https://chromium-review.googlesource.com/296963Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:1149

Change-Id: Ia808c0d411133d135eef8e90485ba346086f012c
Reviewed-on: https://chromium-review.googlesource.com/296964Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

It's valid to have a map entry that is null to represent a framebuffer
that has been generated but never bound.  This was causing crashes after
dEQP pbo tests were run during dEQP shutdown.

BUG=angleproject:1149

Change-Id: Idcedac23e5c4e17ed025b10c2939572b394d3aec
Reviewed-on: https://chromium-review.googlesource.com/296962Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

This replace the non-descriptive digit at the end of the test name by
the name of the dEQP test being run.

BUG=angleproject:1153

Change-Id: Ibc9e5fbf46ffbf3a8c783807161b2bdc63119f54
Reviewed-on: https://chromium-review.googlesource.com/296686Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>
Tryjob-Request: Corentin Wallez <cwallez@chromium.org>

BUG=angleproject:1149
BUG=angleproject:880

Change-Id: I2840043ded50f805afa3032fc1f0362fa91b8877
Reviewed-on: https://chromium-review.googlesource.com/297088
Tryjob-Request: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

Causing crashes on windows.

This reverts commit dfa569e6.

Change-Id: Icbe56455d172ec92395c4f889557091f98a30240
Reviewed-on: https://chromium-review.googlesource.com/297700Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

Fixed GL_MAX_VERTEX_UNIFORM_VECTORS and GL_MAX_FRAGMENT_UNIFORM_VECTORS to report accurate maximum value.

Change-Id: Ic581e1ef0c6be2bf1ff0092b373b3c480b6fbd8a
Reviewed-on: https://chromium-review.googlesource.com/294755Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Cooper Partin <coopp@microsoft.com>
Tryjob-Request: Jamie Madill <jmadill@chromium.org>

Re-landing after fixing D3D9 specific issues.

HLSL doesn't support dynamic indexing of matrices and vectors, so replace
that with helper functions that unroll dynamic indexing into switch/case
and static indexing.

Both the indexed vector/matrix expression and the index may have side
effects, and these will be evaluated correctly. If necessary, index
expressions that have side effects will be written to a temporary
variable that will replace the index.

Besides dEQP tests, this change is tested by a WebGL 2 conformance test.

In the case that a dynamic index is out-of-range, the base ESSL 3.00 spec
allows undefined behavior. KHR_robust_buffer_access_behavior adds the
requirement that program termination should not occur and that
out-of-range reads must return either a value from the active program's
memory or zero, and out-of-range writes should only affect the active
program's memory or do nothing. This patch clamps out-of-range indices so
that either the first or last item of the matrix/vector is accessed.

The code is not transformed in case the it fits within the limited subset
of ESSL 1.00 given in Appendix A of the spec. If the code isn't within
the restricted subset, even ESSL 1.00 shaders may require this
workaround.

BUG=angleproject:1116
TEST=dEQP-GLES3.functional.shaders.indexing.* (all pass after change)
     WebGL 2 conformance tests (glsl3/vector-dynamic-indexing.html)

Change-Id: I66a5e5a8d7f4267da0045f1cc2ba6b0dc7eb3f5d
Reviewed-on: https://chromium-review.googlesource.com/296671Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>

This replace the non-descriptive digit at the end of the test name by
the name of the configuration being tested.

BUG=angleproject:1153

Change-Id: Ieed08c8e5f111c079c183dd96cf3fe1cfff52f7f
Reviewed-on: https://chromium-review.googlesource.com/296685Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

BUG=angleproject:1153

Change-Id: I0b0be8133c04a3ebfed7e9ed20d7375ee5e07903
Reviewed-on: https://chromium-review.googlesource.com/296684Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

dEQP's resetState function triggers these assertions when testing.

BUG=angleproject:1149

Change-Id: Ib6fc3acdf15cadf3ffafad8ffda4788e34f520f0
Reviewed-on: https://chromium-review.googlesource.com/297082Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:882
BUG=angleproject:1149

Change-Id: Iea0b1d0bc586ec9517a06793386c91890b7a5115
Reviewed-on: https://chromium-review.googlesource.com/297086Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

Fixes assertion failures when ShaderGL fails to compile the generated shaders.

BUG=angleproject:882
BUG=angleproject:1149

Change-Id: Ib7c23a54bdb81852864d792f29c89644084859a3
Reviewed-on: https://chromium-review.googlesource.com/297085Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:882
BUG=angleproject:1149

Change-Id: I5e0808dd3576339aa87aade3a349586d01b28f74
Reviewed-on: https://chromium-review.googlesource.com/297087Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

The ternary operator determines that the common type is the value type, causing
a copy of PixelUnpackState.  If PixelUnpackState::pixelBuffer is non-null then
there is an assertion failure in the destructor on any call to Texture::setImage.

See:http://stackoverflow.com/a/30088030

BUG=angleproject:1149

Change-Id: I9654e65956339d6b6966ad65a98cf37ad4e00452
Reviewed-on: https://chromium-review.googlesource.com/297084Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:1149

Change-Id: I641693e67bf35733a591107fdd3812d0badd17f2
Reviewed-on: https://chromium-review.googlesource.com/297083Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

Mark EGL_KHR_create_context as supported in the DisplayGLs.

BUG=angleproject:1149

Change-Id: I20671535680eb2c3b9c08205cee243b3aa5c5821
Reviewed-on: https://chromium-review.googlesource.com/297080Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

dEQP resetState generates a GL error and exits when trying to reset the
pixel buffers after a test.

BUG=angleproject:1149

Change-Id: I133788c6c2f17074bf5bbf5cd17b63338352765f
Reviewed-on: https://chromium-review.googlesource.com/297081Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:1025

Change-Id: I9c6008cc2f268bda4afa2c67e0b3d3716e77ea31
Reviewed-on: https://chromium-review.googlesource.com/296681Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

D3D9 shader models have limited support for looping, so the Appendix A
index/loop limitations are necessary. This is consistent with applying
the limitations on D3D9_3 feature level and lower of the D3D11 backend
too.

Also, when the limitations are not in place, a workaround for dynamic
indexing of vectors and matrices will be applied. This workaround does not
work on the D3D9 backend, as demonstrated with some WebGL conformance
failures caused by it in Chrome on D3D9.

BUG=525188
TEST=angle_end2end_tests

Change-Id: I6411594f067f2740f55d7560427026b23b15dac7
Reviewed-on: https://chromium-review.googlesource.com/296940Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

This replaces the dual-use of sh::Attribute, which can be a bit
confusing to people expecting a literal output variable.

Currently not used in Chromium, so should be safe to land.

BUG=angleproject:1146

Change-Id: I436f2bc9dc4ddc3709369cb2baa344c6b13a21a2
Reviewed-on: https://chromium-review.googlesource.com/296683Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:929

Change-Id: Ifc5ad03579c3e187721842f7585f3f06b69cbf45
Reviewed-on: https://chromium-review.googlesource.com/296682Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>