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0ffc441e
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2017-05-19T14:18:55
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Initialize uninitialized globals in GLSL output
Initializing globals is done by the DeferGlobalInitializers AST
transformation, which makes sure that the global variable init
proceeds in the correct order. This is important since some global
variables may use other uninitialized globals in their initializers.
The global variable init is only done in case the WebGL shader spec is
being followed. This avoids adding global initializers twice in case
the same shader goes through multiple translations, assuming only one
of them is a WebGL shader translation.
BUG=angleproject:1966
TEST=angle_end2end_tests, WebGL conformance tests
Change-Id: Iea701d3ae40edc906abd87303f2aa27fd23bf55a
Reviewed-on: https://chromium-review.googlesource.com/509689
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
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83498433
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2017-05-19T14:57:23
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Put global init code inside main() instead in a function
Otherwise we may run into a name conflict issue if the shader code is
run through the translator twice, since neither user-defined function
names or internal function names are currently being prefixed in GLSL
output. This could be fixed by prefixing user-defined variables in
GLSL output, but this solution is much simpler.
BUG=angleproject:1966
TEST=angle_end2end_tests, WebGL conformance tests
Change-Id: I15c8de5a0a5e596fafe9f55e8d370345c790d5cc
Reviewed-on: https://chromium-review.googlesource.com/509688
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
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45bcc784
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2016-11-07T13:58:48
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translator: Scope all classes with "sh".
I was seeing an odd problem with our PoolAlloc conflicting with the
glslang/Vulkan TIntermNode, so the fix was to move everything to a
separate namespace.
The bison grammars are also regenerated. No functional changes.
BUG=angleproject:1576
Change-Id: I959c7afe4c092f0d458432c07b4dcee4d39513f3
Reviewed-on: https://chromium-review.googlesource.com/408267
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
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6d40bbdd
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2016-09-30T13:49:38
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Split TIntermBlock from TIntermAggregate
The new TIntermBlock node class replaces TIntermAggregate nodes with
the EOpSequence op. It represents the root node of the tree which is
a list of declarations and function definitions, and any code blocks
that can be denoted by curly braces. These include function and loop
bodies, and if-else branches.
This change enables a bunch of more compile-time type checking, and
makes the AST code easier to understand and less error-prone.
The PostProcess step that used to be done to ensure that the root node
is TIntermAggregate is removed in favor of making sure that the root
node is a TIntermBlock in the glslang.y parsing code.
Intermediate output formatting is improved to print the EOpNull error
in a clearer way.
After this patch, TIntermAggregate is still used for function
definitions, function prototypes, function parameter lists, function
calls, variable and invariant declarations and the comma (sequence)
operator.
BUG=angleproject:1490
TEST=angle_unittests, angle_end2end_tests
Change-Id: I04044affff979a11577bc1fe75d747e538b799c8
Reviewed-on: https://chromium-review.googlesource.com/393726
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
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3d932d83
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2016-04-12T11:10:30
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Defer global initializers when necessary
Move global variable initializers that are not constant expressions to
a function that gets called at the start of main(). This is done
with an AST transformation. This needs to be done because global
variable initializers must be constant in native GL, but ANGLE is more
lenient with what can be put into ESSL 1.00 global initializers to
remain compatible with legacy WebGL content.
Non-constant global variable initializers also caused issues in HLSL
output, since in HLSL output some types of expressions get unfolded
into multiple statements. These include short-circuiting operators and
array initialization. To make sure that these cases are covered, any
initializers that can't be constant folded are deferred, even if they
have the const qualifier.
The old deferring mechanism in OutputHLSL is removed in favor of this
new AST transformation based approach.
BUG=angleproject:819
BUG=angleproject:1205
BUG=angleproject:1350
BUG=596616
TEST=WebGL conformance test
conformance/glsl/misc/global-variable-init.html
Change-Id: I039cc05d6b8c284baeefbdf7f10062cae4bc5716
Reviewed-on: https://chromium-review.googlesource.com/338291
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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