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d0bad2c7
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2016-09-09T18:01:16
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Split ternary node class from TIntermSelection
Ternary operator nodes are typed parts of expressions, they always
have two children and the children are also guaranteed to be
TIntermTyped. "If" selection nodes can't be a part of an expression,
they can have either one or two children and the children are code
blocks. Due to all of these differences it makes sense to store these
using two different AST node classes.
BUG=angleproject:1490
TEST=angle_unittests
Change-Id: I913ab1d806e3cdb5c21106f078cc9c0b6c72ac54
Reviewed-on: https://chromium-review.googlesource.com/384512
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
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a223430c
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2016-08-31T12:05:39
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Promote unary nodes automatically
Unary nodes now get their type set automatically based on the
operation and operand. The operand should only be changed to another
of the same type after the node is constructed. The operation can't
be changed on unary and binary nodes after they've been constructed.
BUG=angleproject:1490
TEST=angle_unittests
Change-Id: Ib1ea3dcb1162261966c02d5f03d8091cf647fac1
Reviewed-on: https://chromium-review.googlesource.com/378935
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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3cbb27a1
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2016-07-14T11:55:48
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Simplify loop conditions so that they won't generate statements
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/362570
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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03d863c8
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2016-07-27T18:15:53
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translator: Refactor node replacement APIs.
BUG=angleproject:851
Change-Id: I50c3b3a4f00b27fed85f09509738513a441c7b5b
Reviewed-on: https://chromium-review.googlesource.com/363990
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
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00f6fbbe
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2016-07-20T16:32:29
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Add IntermNodePatternMatcher helper class
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/361693
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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3fed4306
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2015-11-02T12:26:02
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Unfold short-circuiting operators in loop conditions correctly
Sometimes short-circuiting operators need to be unfolded to if
statements. If the unfolded operator is inside a loop condition or
expression, it needs to be evaluated repeatedly inside the loop. Add
logic to UnfoldShortCircuitToIf that can move or copy the unfolded part
of loop conditions or expressions to inside the loop.
The exact changes that need to be done depend on the type of the loop.
For loops may require also moving the initializer to outside the loop.
The unfolded expression inside a loop condition or expression is moved
or copied to inside the loop on the first traversal of the loop node,
and unfolding to if is deferred until a second traversal. This keeps the
code relatively simple.
BUG=angleproject:1167
TEST=WebGL 2 conformance tests,
dEQP-GLES2.functional.shaders.*select_iteration_count*
Change-Id: Ieffc0ea858186054378d387dca9aa64a5fa95137
Reviewed-on: https://chromium-review.googlesource.com/310230
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
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3d0d9a48
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2015-06-01T12:16:36
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Clean up TIntermTraverser usage
Remove default parameters from TIntermTraverser.
Also clean up a few dead function declarations in traversers.
TEST=angle_unittests, angle_end2end_tests
BUG=angleproject:1037
Change-Id: I8d126c6c2d5b53e8b14e23e3d102f204a59323b3
Reviewed-on: https://chromium-review.googlesource.com/275184
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
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d4f303ee
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2015-05-20T17:09:06
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Refactoring: Make creating temporary symbols in AST traversal reusable
Temporary symbols will also be needed to store temporary arrays when complex
array expressions are unfolded.
Also clear tree update related structures at the end of updateTree(), so that
the traverser can be reused for several rounds of replacement more easily, and
remove unnecessary InVisit step from UnfoldShortCircuitToIf.
BUG=angleproject:971
TEST=angle_end2end_tests, WebGL conformance tests
Change-Id: Iecdd3008d43f01b02fe344ccde8614f70e6c0c65
Reviewed-on: https://chromium-review.googlesource.com/272121
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
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56eea884
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2015-05-18T12:41:03
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Refactoring: make tracking parent block position in AST traversal reusable
Add a helper function to make it easier for traverser classes to insert
statements, and use it in UnfoldShortCircuitToIf.
BUG=angleproject:971
TEST=angle_end2end_tests, WebGL conformance tests
Change-Id: I141bdd8abf4b01988581e6cb27c2320bf38370ac
Reviewed-on: https://chromium-review.googlesource.com/272140
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
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0ea959f4
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2015-05-13T14:51:59
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Unfold sequence operator when operations inside need unfolding
Unfolding the sequence operator ensures correct evaluation order when parts of
the expression need to get hoisted out of the expression to the surrounding
scope.
BUG=angleproject:1001
TEST=WebGL conformance tests
Change-Id: Ifd3093c9fb63d3e9842ebb4b9531b2f46875ad8a
Reviewed-on: https://chromium-review.googlesource.com/270660
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
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a6f22096
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2015-05-08T18:31:10
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Make UnfoldShortCircuit to change AST instead of writing output
This is needed to make way for further AST transformations to handle array
expressions that need to work correctly together with unfolding short-
circuiting operators. This also improves the maintainability of HLSL output
by isolating the unfolding into a separate compilation step.
The new version of UnfoldShortCircuit traverser will traverse the tree until
an expression that needs to be unfolded is encountered. It then unfolds it and
gets reset. The traverser will be run repeatedly until no more operations to
unfold are found. This helps with keeping the traverser's design relatively
simple.
All declarations are separated to single declarations before short-circuit
unfolding is run. Previously OutputHLSL already output every declaration
separately.
BUG=angleproject:960
TEST=WebGL conformance tests, angle_unittests, angle_end2end_tests
Change-Id: Id769be396adbd4c0223e418980dc464dd855f019
Reviewed-on: https://chromium-review.googlesource.com/270460
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
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