We have a check that ensures that the optimizer did not change the
binary when it says that it did not. However, when the binary is
converted back to a binary, we made a decision to remove OpNop
instructions. This means that any spv file that contains a NOP
originally will fail this check.
To get around this, we convert the module to a second binary that keeps
the OpNop instructions. That binary is compared against the original.
Fixes https://crbug.com/1010191
Added exports for libraries. External libraries that themselves use
libraries require all dependencies have exports, so not having exports can
cause major problems when used within other projects.
Install paths for exports are now placed in the proper directories expected
by Windows and *nix systems. Config files are generated as well, which
should work with CMake's find_package() function once installed.
This change refactors the 'split blocks' transformation so that an
instruction is identified via a base, opcode, and number of those
opcodes to be skipped when searching from the base, as opposed to the
previous design which used a base and offset.
* Validate that selections are structured
WIP
* new checks that switch and conditional branch are proceeded by a
selection merge where necessary
* Don't consider unreachable blocks
* Add some tests
* Changed how labels are marked as seen
* Moved check to more appropriate place
* Labels are now marked as seen when there are encountered in a
terminator instead of when the block is checked
* more tests
* more tests
* Method comment
* new test for a bad case
A refactoring that separates the identification of an instruction from
the identification of a use in an instruction, to enable the former to
be used independently of the latter.
A new pass that allows the fuzzer to change the 'loop control' operand
(and associated literal operands) of OpLoopMerge instructions.
Fixes#2938.
Fixes#2943.
Adds a fuzzer pass and transformation to create a composite (array,
matrix, struct or vector) from available constituent components, and
inform the fact manager that each component of the new composite is
synonymous with the id that was used to construct it. This allows the
"replace id with synonym" pass to then replace uses of said ids with
uses of elements extracted from the composite.
Fixes#2858.
* Remove Impl struct in Reducer; we can re-add it later (in a cleaner fashion) if we need to.
* Add cleanup passes in Reducer; needed so that removal of constants can be disabled during the main passes, and then enabled during cleanup passes, otherwise some main passes can perform worse due to lack of available constants.
* Delete passes: remove op name, remove relaxed precision. And delete associated tests.
* Add more tests for remove unreferenced instructions.
* Always return and write the output file, even if there was a reduction failure.
* Only exit with 0 if the reduction completed or we hit the reduction step limit.
Issue #2919 identifies a problem in spirv-fuzz's ability to determine
when it is safe to add a new control flow edge without breaking
dominance rules. This change adds a (currently disabled) test to
expose the issue, and a comment to document that the current solution
is incomplete.
We want to handle OpKill better. The wrap opkill causes lots of extra
code to be generated, even when they are not needed to avoid the main
problem: OpKill cannot be found directly in a continue construct.
This change will be more selective on which functions the OpKill will be
wrapped and inlining will avoid inlining.
Fixes#2912
Adds a spirv-fuzz option for converting a SPIR-V shader into a shader
that renders red, whilst containing the body of the original shader.
This is for aiding in compiler crash bug reporting.
* reduce: add -o.
* reduce: add --temp-file-prefix.
* reduce: add interestingness test args.
* Detect bad args with one dash e.g. -a.
* reduce: fix validator args.
* Add = to args that require it.
* More consistent naming/style across fuzz/reduce.
* Change some 0 exit codes to 1.
* Add continue construct analysis to struct cfg analysis
Add the ability to identify which blocks are in the continue construct for a
loop, and to get functions that are called from those blocks, directly or
indirectly.
Part of https://github.com/KhronosGroup/SPIRV-Tools/issues/2912.
There is nothing in the spir-v spec that says the last
instructions in a module cannot be OpLine or OpNoLine.
However, the code that parses the module will simply drop
these instructions.
We add code that will preserve these instructions.
Strip-debug-info is updated to remove these instructions.
Fixes https://crbug.com/1000689.
Because dominance information becomes a bit unreliable when blocks are
unreachable, this change makes it so that the 'dead break'
transformation will not introduce a break to an unreachable block.
Fixes#2907.
The performance of the fuzzer was unacceptable in the 'permute blocks'
transformation, due to dominator analysis being repeatedly invalidated
and recomputed. This change preserves the dominator analysis,
together with the CFG analysis, when a block is moved down.
