Commit Graph

108 Commits

Author SHA1 Message Date
John Stiles
b4b627e62a Disallow usage of private types ($vec, etc) in non-builtin code.
This fixes a fuzzer crash in Metal.

Private types aren't meant to be used directly; we can't generate a
valid MemoryLayout for them. We will now detect them during IR
generation and report an error. (Note that unreferenced structs
currently don't have any IR representation at all, so structs have to be
used somewhere in the code to trigger the error.)

Bug: oss-fuzz:27288
Change-Id: I432f0a69fbb54cd33ff5b90a9f3d4757a9370117
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/334830
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2020-11-13 21:55:50 +00:00
John Stiles
76013704ad Add unit tests for overflowing int and uint literal limits.
At present, we do not report any error; the values wrap silently.

Change-Id: I8c435cfdd81f6c2e5fd87e9c39c708138bf4ec82
Bug: skia:10932
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333676
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-11-11 16:11:15 +00:00
John Stiles
7f7b48537c Fix flipped array dimensions in SkSL.
Change-Id: I6e44dd5c347b43b3a5cb135724083adbaf65cf27
Bug: skia:10924
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333536
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2020-11-10 18:08:29 +00:00
John Stiles
a695d62772 Limit struct nesting depth to a maximum of eight levels.
This addresses a sanitizer issue discovered in
https://oss-fuzz.com/testcase-detail/4908118777266176 (it has not been
assigned an oss-fuzz bug number yet; coming soon)

This puts an upper bound on struct nesting, again to prevent memory-
layout and other recursive type-handling code from overflowing the
stack. Coincidentally, while researching GLSL behavior around this bug,
I learned that WebGL has a similar limitation but caps nested structs to
4 deep. (I could not find any documented GLSL upper bound.)

Note that both the GLSL and Metal outputs for StructMaxDepth are badly
malformed. (Structs cannot be embedded within another struct in GLSL;
structs SA7 and below are never declared in GLSL; the array list for SA7
is backwards in GLSL; Metal is missing structs SA1 through SA8; Metal
puts the array list on the type instead of the variable name.)
These issues will be addressed in separate CLs.

Change-Id: I0f1059b6faa400cd0647dd7010ec839f73779a36
Bug: skia:10922, skia:10923, skia:10925, skia:10926
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333316
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-11-10 16:58:37 +00:00
John Stiles
8d05659074 Limit arrays to a maximum of eight dimensions.
This addresses a sanitizer issue discovered in
https://oss-fuzz.com/testcase-detail/4908118777266176 (it has not been
assigned an oss-fuzz bug number yet; coming soon)

We need to set some sort of limit here to avoid stack overflow. Eight
array dimensions seems like more than enough for any sort of code that
we might realistically need, but the limit is definitely flexible if we
wanted to increase it. (The fuzzer needed to generate a several-
hundred-dimensional array before encountering a crash.)

Change-Id: I3630ab40e47cc58a2280ba200b485e1958371fdc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333160
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-10 16:56:27 +00:00
John Stiles
9e2544e62f Add unit test for array with many dimensions.
This addresses a sanitizer issue discovered in
https://oss-fuzz.com/testcase-detail/4908118777266176 (it has not been
assigned an oss-fuzz bug number yet; coming soon)

A followup CL will limit array dimensionality to 8. This is an arbitrary
choice which is hopefully larger than any reasonable program will need.

Change-Id: I4cf05f40ec92c1c3444c71c45f759bb30d7da3c9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333135
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-11-10 15:58:47 +00:00
John Stiles
e96c19e902 Add unit test demonstrating array function param bug.
A GLSL function like:
    void fn(int x[1][2][3]) {...}

Will emit SkSL with the array dimensions in reverse order:
    void fn(int x[3][2][1]) {...}

Trying to invoke the function will fail because it expects a reverse-
dimensioned array.

Change-Id: I24431aabd2f6111b5493f63f0a85f9c78514d522
Bug: skia:10924
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333317
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-10 14:04:36 +00:00
John Stiles
84d503b213 Report an SkSL error if an in var has an initializer expression.
This resolves the fuzzer error, as the program will fail compilation
before reaching the SPIR-V translation stage at all.

Change-Id: Ia73af497b1f57314a29878f2d2a29dc80186e630
Bug: oss-fuzz:27300
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333130
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-09 21:37:39 +00:00
John Stiles
0ad52f6a24 Add unit test for fuzzer-detected error with in vars.
`in` vars shouldn't support initializer expressions at all. The fuzzer
noticed that dead-stripping interacts poorly with `in` var initializer
expressions, which makes sense because it's an unsupported and untested
path. In a followup CL, lines 1 and 3 will both become errors.

Change-Id: Ibb64ca319a046b040eea976acb6798a1402451de
Bug: oss-fuzz:27300
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333128
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-09 18:14:56 +00:00
John Stiles
cf27b4f744 Improve constant folding for int vectors.
This implements constant folding optimizations on int vectors
(== != + - * /) that were previously only supported on float vectors.

Bug: skia:10908
Change-Id: Ibf61ab43eb7ae2ce8e99cce21cc55777359817e5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332424
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-11-06 17:22:34 +00:00
John Stiles
107e862eb6 Add int-vector folding tests to VectorFolding.
This test is meant to demonstrate that constant folding for int and
float vectors is not on equal footing. Float vectors currently generate
better-optimized output.

Change-Id: Ib4822c7b594e9bc4eb4fb9cfe6ab46f7f76268d6
Bug: skia:10908
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332423
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-05 19:39:17 +00:00
John Stiles
71624de2c5 Allow constant propagation for negated constant-vectors and ints.
This CL improves on the previous fix for oss-fuzz:26789 by actually
propagating the negation from the PrefixExpression inside the
constructor, which unblocks further optimizations.

Interestingly, this fix also exposes a further missing optimization--we
optimize away comparisons of constant-vectors for floats, but fail to
do the same for ints.

Change-Id: I9d4cb92b10452a74db96ff264322cdc8a8f2a41f
Bug: oss-fuzz:26830, oss-fuzz:26789, skia:10908
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332263
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-11-05 17:39:48 +00:00
John Stiles
68dcf542b7 Migrate CrbugOssfuzz21688 to a golden-output test.
Change-Id: I2c077e723d123b01fbcc8fe841ee1f3d28dc152d
Bug: skia:10694
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332037
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2020-11-04 22:34:13 +00:00
John Stiles
95acbbc3c9 Fix crash when comparing against a negated constant vector.
This CL solves the fuzzer crash. Constant propagation of the negative
sign into the vector will be investigated in a followup CL.

This CL also adds a few cleanups into IRGenerator::constantFold.

Change-Id: If73a4fe2a5777265e7d43cc4f482653a38cb59af
Bug: oss-fuzz:26830, oss-fuzz:26789
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332261
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-11-04 22:17:53 +00:00
John Stiles
6c88ea1278 Create unit test for comparison against a negated constant vector.
Change-Id: Ibc1a8d3ebbf62cc55d013f7d9146f6b155d11da2
Bug: oss-fuzz:26830, oss-fuzz:26789
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332377
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-04 22:15:23 +00:00
John Stiles
6e7cfaff18 Fix bad FP codegen when sample() calls are inlined.
Previously, temp variables created by sample() calls were named after
the offset of the sample() call within the code. This was
straightforward but would fail if the sample() call were duplicated via
inlining of helper functions.

FP sample() temp variables are now named using a counter, starting from
zero and counting upwards.

Change-Id: I16f9a3426117677c0df13d15772320def99cc0d6
Bug: skia:10858
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331415
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-11-03 19:54:45 +00:00
John Stiles
569249be6c Improve support for function prototypes in SkSL.
Previously, when a prototype was parsed, this added a function
declaration to the symbol table, but the prototype itself was not
re-emitted during code generation. This meant that the final code might
not be valid, since the absence of prototypes meant that the code might
attempt to invoke a function before its declaration. Now, prototypes are
stored in the ProgramElement list and re-emitted during code generation
for GLSL/Metal/CPP. (SPIR-V doesn't name its functions at all.)

Change-Id: I76446c796000eb0b56f964d82457122182c28b87
Bug: skia:10872
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331136
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-11-03 19:09:25 +00:00
John Stiles
7d3f089e58 Fix use-after-free error discovered by the fuzzer.
When eliminating a CFG node, we now flag its exit nodes; if our
optimization pass reaches one of those flagged nodes, we stop the
current optimization process in its tracks and initiate a rescan.

We do NOT recursively mark the exits of the exit nodes, so this fix is
reliant on the CFG being ordered in a non-chaotic fashion, but in
practice this seems to be sufficient for the CFGs we generate today.

Change-Id: I892805361c5f4297e02146f37a759dfda83f5488
Bug: oss-fuzz:26942
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331597
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-03 17:59:02 +00:00
Brian Osman
b047b5ddf4 Disable "any" function workaround in standalone/non-GPU caps
Change-Id: Ief57d9c102b3c7658738920cdf54ccd4d21c5c5e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331656
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
2020-11-03 17:36:43 +00:00
John Stiles
e103f941fc Create test case for oss-fuzz:26942.
Change-Id: I19a9564ac4d52b709b8fdd757b99222372c626f4
Bug: oss-fuzz:26942
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331598
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-03 17:19:22 +00:00
John Stiles
bfad3e2a4a Add test cases to function-prototype golden outputs.
- Prototypes for never-declared functions
- Prototype before use
- Prototype after use
- A variety of inputs and outputs on the prototyped functions.
- Calling declared-but-undefined functions

Currently, the prototypes are not actually emitted in the generated GLSL
or Metal output at all. This CL is demonstrates our baseline before
proper prototype support is added.

Change-Id: I6112e0a89ab9bbecefccaca9fba985bb8011fff1
Bug: skia:10872
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331376
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-11-02 17:17:23 +00:00
John Stiles
47ee0caa10 Split Texture test into separate 1D and 2D tests.
This improves the test output for Metal. Previously, the Metal output
was just an error message, since 1D textures were unsupported. Now we
have a valid golden output for the 2D case in Metal. (1D is still
unsupported and is likely to remain unsupported; Skia currently has no
use case for 1D textures.)

Change-Id: I91977712030f08e371cc6bfb2afa578940ca00b7
Bug: skia:10797
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/330940
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-11-02 14:39:31 +00:00
John Stiles
869cdefdd1 Fix unknown-identifier issue discovered by fuzzer.
This error was caused by an unbalanced symbol table push. This could
occur when an interface block encountered an error while parsing its
var-decls.

Change-Id: I910a980ac92fac7c0786c48b8dc3003ee3e75e5b
Bug: oss-fuzz:26700
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/330896
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-10-30 19:11:31 +00:00
John Stiles
09479909d1 Add unit test for error discovered by fuzzer.
Before http://review.skia.org/330743 was submitted, this caused an
assertion during CFG generation: http://screen/95ZaTYzon4bMVtE

Change-Id: Icf93472394de3d17425ad1258a68b263cab88eb1
Bug: oss-fuzz:26759
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/330816
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-10-30 18:18:31 +00:00
John Stiles
4691b0f82b Fix crash when compiling FP files containing the modulo operator.
Change-Id: Idfbe128978575ab84b54485bffe2d82570ee099f
Bug: skia:10870
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/330620
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-29 22:55:28 +00:00
John Stiles
8bc1a72cba Add unit test to demonstrate error with modulo in FP files.
(This CL also adds modulo to the IntFolding shared test, since this was
absent from the test. It's implemented and working properly already.)

Change-Id: I24a947ab38754bff2624cd5b58cf7a39553ca888
Bug: skia:10870
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/330596
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-10-29 20:46:08 +00:00
John Stiles
fdf6148102 Pass function arguments using SkSpan instead of count + ptr.
There's no functional change here; it's just using a slightly higher-
level abstraction to pass the same payload.

Change-Id: Ife7efa038db5d6dbde5decae2be79ad9db877aba
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329782
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-10-27 14:41:04 +00:00
John Stiles
890363ae34 Prototype helper functions from FP files before use.
GLSL requires that functions are declared before first use. In most
cases, we avoid the requirement for explicit prototypes by this by
strategically ordering our functions within the emitted code, but an FP
file might reference its helper functions in any order or have helper
functions that cross-invoke each other, so prototypes should be emitted.

Change-Id: I3b9e9c9ec4bd5be90b4f71f8165af45364facf30
Bug: skia:10872
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329781
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-10-27 14:33:00 +00:00
John Stiles
6b58a33c16 Mangle function names as a separate step before emitting func-bodies.
This is necessary to support function calls in FP files properly; in
some cases, functions can be referenced before they have been emitted,
and we need to be able to name them.

This CL resolves the remaining errors in GrRecursion.cpp. There are
still additional errors in GrNestedCall.cpp that will be fixed in
followup CLs.

Change-Id: Iec98ef02ea6a98a9945a4e0e3cfa3537dff01305
Bug: skia:10684, skia:10872
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329676
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-27 14:22:10 +00:00
John Stiles
d2a3a5b3b4 Add support for fFormatArgs in .fp-file inner functions.
Previously, we'd just emit functions with `%s` in their function bodies.
Also, the fFormatArgs wouldn't get cleaned up, so subsequent code would
fill in the wrong format arguments in each place.

There are still problems with function calls (`sample` is broken;
function names are accessed before they've been declared or initialized)
but this is a step in the right direction.

Bug: skia:10684
Change-Id: I7399a71d44ebba5049703484ec9933dffbe8e2b9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329417
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-26 16:15:33 +00:00
John Stiles
8744a5c820 Add unit test for nested function calls in FP files.
`func1` and `func2` emit bad code, `return %s()`, and because they don't
consume their `%s` format argument. This leaves the format argument list
unbalanced and all future args are wrong.

Another serious problem is that we don't actually know the names of the
functions that they need to call, because we haven't emitted them yet.

`func3` is not emitted at all. Sampling from a fragment processor
apparently fails in this context.

This is a more general case repro for skia:10684--it turns out that
recursion in particular wasn't the issue, but nested function calls just
don't work properly at all in FP files. This wasn't an issue in practice
because we don't have any existing FP files which nest function calls,
and the inliner also tends to aggressively flatten everything out if we
don't explicitly disable it.

Change-Id: Iff029c459c7d90be566f9b4c9be0e3150e459866
Bug: skia:10684
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329367
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-23 21:07:36 +00:00
John Stiles
530933006d Add unit test demonstrating recursion codegen bug.
The generated code does not assign to sk_OutColor correctly; it assigns
into the `factorial` function name instead, which doesn't make sense.

Change-Id: Ibad1d47f2f9c4fbb410b5277cea6e1022daf8b9d
Bug: skia:10684
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329360
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-10-23 16:33:15 +00:00
John Stiles
9cef66fbf5 Fix use-after-free discovered by fuzzer.
In cases where multiple variables were declared on a single line, it is
legal for variable initialization-expressions to reference variables
declared earlier in the var-decl statement. It is NOT legal for the
inliner to move those references up to the previous statement, where the
variable doesn't exist yet.

This is mitigated by disabling the IRGenerator inliner for var-decls
past the first one in a var-decls statement. (The optimizer will still
pass over this code later and is able to inline it correctly, if it is
worth doing.)

Change-Id: I7a0d45eab20e30ed9f6b2f5c1251b6e0d8eeaea3
Bug: oss-fuzz:26167
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329357
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-10-23 16:10:15 +00:00
John Stiles
15d8174fc9 Add unit test for self-referential initializer expressions.
These don't compile in GLSL, so they shouldn't compile in SkSL either--
and fortunately, they do not.

(In C++, and consequently in Metal, these expressions are considered
legal by the grammar and do compile, but generate garbage output.)

Change-Id: I6c7bea70b3d91677ccd8fcbad1eba123d655e856
Bug: skia:10694
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/329359
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-23 14:36:05 +00:00
Brian Osman
2d2f82c00a Always declare sk_FragColor in GLSL, even if unused
PLS and discard-only shaders are the only time this has an impact,
and it doesn't seem like a problem to have the declaration?

Removes one use of variable reference counts, which are going to be
refactored.

Change-Id: Idb8d06087eed56070252ee02dcf907bf0d24c5a1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/328796
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2020-10-20 21:13:31 +00:00
John Stiles
a80a3dc170 Fix frexp support in Metal.
Our Metal codegen assumes that out params are pointers, but Metal's
built-in frexp actually takes a reference for the exponent, not a
pointer. We now add in a helper function to translate.

Change-Id: I24686347d07151dd99a1ff1c43aff2b35c3181e5
Bug: skia:10762
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/328387
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-20 15:31:31 +00:00
Brian Osman
2e25ff436a Directly compute call counts, rather than mutating state
This causes a ~4% regression on sksl_large, but some of that
can be bought back in two ways:

1) Removing (now unnecessary) cloning of program elements
2) Hoisting the new analysis passes, with (nontrivial)
   logic to update/maintain the call counts as we edit IR.

Also, this fixes bugs where we were emitting functions that
had "calls" from no-longer called functions.

Bug: skia:10776
Change-Id: I4f8c29957be2e4233a883c9a1125f363b82ee40c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/327198
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
2020-10-19 16:08:39 +00:00
John Stiles
4c412bce4c Revert "Reland "Remove inliner from IR generation stage.""
This reverts commit e497a08065.

Reason for revert: Pinpoint disagrees

Original change's description:
> Reland "Remove inliner from IR generation stage."
>
> This reverts commit 941fc7174f.
>
> Reason for revert: performance now seems to be roughly equal or better
> (~1%) over several trials.
> Nanobench: http://screen/A8e8sojaXBgbMgF
>
> Original change's description:
> > Revert "Remove inliner from IR generation stage."
> >
> > This reverts commit 21d7778cb5.
> >
> > Reason for revert: Pinpoint absolutely hates this change
> >
> > Original change's description:
> > > Remove inliner from IR generation stage.
> > >
> > > There is no need to inline code during IR generation, as the optimizer
> > > can now handle this.
> > >
> > > Change-Id: If272bfb98e945a75ec91fb4aa026e5631ac51b5b
> > > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/315971
> > > Commit-Queue: John Stiles <johnstiles@google.com>
> > > Commit-Queue: Brian Osman <brianosman@google.com>
> > > Reviewed-by: Brian Osman <brianosman@google.com>
> > > Auto-Submit: John Stiles <johnstiles@google.com>
> >
> > TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com
> >
> > Change-Id: I62c235415bcdc92a088e2a7f9c3d7dbf7e1bf669
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/317976
> > Reviewed-by: John Stiles <johnstiles@google.com>
> > Commit-Queue: John Stiles <johnstiles@google.com>
>
> TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com
>
> Change-Id: I6189806c678283188f4b67ee61e5886f88c2d6fc
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324891
> Reviewed-by: John Stiles <johnstiles@google.com>
> Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Auto-Submit: John Stiles <johnstiles@google.com>

TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com

Change-Id: I79149467565f22f53b8c28868dd53b80f3421137
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/325626
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-13 15:20:28 +00:00
Brian Osman
8dbdf23f31 Remove two uses of setModifiersHandle
As a prelude to going back to sharing global data (safely), we want to
eliminate as much mutation of shared state as possible. The special
cases for global variable declaration were unnecessary, so just remove
them. The editing of main's parameters immediately after they were
created is also unnecessary - just hoist the logic up so we create the
variables correctly in the first place.

There is still one use, related to invocation ID. That's more
complicated (?), so leaving it as a separate CL.

Change-Id: Ia3dad78dd5a634273b2e2239368be7adaff65f38
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/325661
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
2020-10-13 14:15:18 +00:00
Brian Osman
5d08a27530 Add geometry shader test demonstrating max_vertices/invocations bug
Declaring max_vertices before invocations fails to adjust max_vertices
when invocation support is not present. (It should be 4, not 2 in this
case).

Bug: skia:10827
Change-Id: Ief7af97eabf5414ea8363808fc1ad2e9c480fe10
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/325664
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
2020-10-12 21:19:33 +00:00
John Stiles
f972313fa1 Add test for disabling the inliner.
This golden verifies that when the inline threshold is zero, inlining is
not performed.

Change-Id: Icad6e1faed569dd1b2469874be3b9e635ad0b9ad
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/325656
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2020-10-12 17:14:07 +00:00
John Stiles
e497a08065 Reland "Remove inliner from IR generation stage."
This reverts commit 941fc7174f.

Reason for revert: performance now seems to be roughly equal or better
(~1%) over several trials.
Nanobench: http://screen/A8e8sojaXBgbMgF

Original change's description:
> Revert "Remove inliner from IR generation stage."
>
> This reverts commit 21d7778cb5.
>
> Reason for revert: Pinpoint absolutely hates this change
>
> Original change's description:
> > Remove inliner from IR generation stage.
> >
> > There is no need to inline code during IR generation, as the optimizer
> > can now handle this.
> >
> > Change-Id: If272bfb98e945a75ec91fb4aa026e5631ac51b5b
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/315971
> > Commit-Queue: John Stiles <johnstiles@google.com>
> > Commit-Queue: Brian Osman <brianosman@google.com>
> > Reviewed-by: Brian Osman <brianosman@google.com>
> > Auto-Submit: John Stiles <johnstiles@google.com>
>
> TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com
>
> Change-Id: I62c235415bcdc92a088e2a7f9c3d7dbf7e1bf669
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/317976
> Reviewed-by: John Stiles <johnstiles@google.com>
> Commit-Queue: John Stiles <johnstiles@google.com>

TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com

Change-Id: I6189806c678283188f4b67ee61e5886f88c2d6fc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324891
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-12 16:53:27 +00:00
John Stiles
0f37907ac7 Undo call-count fix for intrinsic functions.
This CL is conceptually a revert of http://review.skia.org/320258,
although the code has changed shape a bit since that CL was landed.

This fix was too aggressive, and can lead to functions being dead-
stripped while they still have an active reference.

Change-Id: I6ce8b0ad9cc2a42e8be8cb10d3a8219149eca6aa
Bug: skia:10776
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/325462
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-10-12 15:58:27 +00:00
John Stiles
13fc260c70 Reject struct vardecls with modifiers.
These aren't allowed in GLSL, and typically don't make sense.

Change-Id: I0afca0df638590466922a809e91ef0be35b13ca8
Bug: skia:10765
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324816
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-10-09 22:34:23 +00:00
John Stiles
6f3015a562 Reland "Add sk_Caps.builtinDeterminantSupport and use it in cross()."
This is a reland of 6bbf026b54

Original change's description:
> Add sk_Caps.builtinDeterminantSupport and use it in cross().
>
> This CL partially relands http://review.skia.org/321790.
>
> Change-Id: I26a1aefda8a01167783e6e7fa15a51aa35ee5d82
> Bug: skia:10819, skia:10810
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323784
> Reviewed-by: Chris Dalton <csmartdalton@google.com>
> Commit-Queue: John Stiles <johnstiles@google.com>

Bug: skia:10819
Bug: skia:10810
Change-Id: I7731f93db07bc917707cbbe1daca2e5ce0f763d7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324620
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2020-10-09 14:45:23 +00:00
John Stiles
eaaa71b705 Add test for sk_Caps.mustGuardDivisionEvenAfterExplicitZeroCheck.
Change-Id: Ib1374e1dce1a654a83813dbe341774bd91729796
Bug: skia:10694, skia:10819
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324356
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2020-10-09 13:48:13 +00:00
John Stiles
8f84cee9ab Add test for sk_Caps.inBlendModesFailRandomlyForAllZeroVec.
This CL also alphabetizes the various factories in ShaderCapsFactory.

Change-Id: I0378ceb821678173e72690d5563d2a9a92d90201
Bug: skia:10694, skia:10819
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324257
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-10-09 13:44:43 +00:00
Jim Van Verth
2ae1dd93d8 Revert "Add sk_Caps.builtinDeterminantSupport and use it in cross()."
This reverts commit 6bbf026b54.

Reason for revert: Breaking Metal bot.

Original change's description:
> Add sk_Caps.builtinDeterminantSupport and use it in cross().
>
> This CL partially relands http://review.skia.org/321790.
>
> Change-Id: I26a1aefda8a01167783e6e7fa15a51aa35ee5d82
> Bug: skia:10819, skia:10810
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323784
> Reviewed-by: Chris Dalton <csmartdalton@google.com>
> Commit-Queue: John Stiles <johnstiles@google.com>

TBR=csmartdalton@google.com,johnstiles@google.com

Change-Id: I4a6c1a63dc38682dd965f78f0c1da98f35b6dbad
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:10819
Bug: skia:10810
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324264
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
2020-10-09 00:12:34 +00:00
John Stiles
6bbf026b54 Add sk_Caps.builtinDeterminantSupport and use it in cross().
This CL partially relands http://review.skia.org/321790.

Change-Id: I26a1aefda8a01167783e6e7fa15a51aa35ee5d82
Bug: skia:10819, skia:10810
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323784
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2020-10-08 22:51:15 +00:00
Brian Osman
c021360a88 Only include one variable per declaration statement
This removes VarDeclarationsStatement entirely. VarDeclaration instances
appear directly as statements in Programs. SkSL that declares multiple
variables in a single declaration is transformed to represent that as a
series of VarDeclaration statements.

Similarly, global variable declarations are represented by
GlobalVarDeclaration program elements, one per variable.

Bug: skia:10806
Change-Id: Idd8a2d971a8217733ed57f0dd2249d62f2f0e9c5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323102
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
2020-10-07 17:27:01 +00:00