73c57bbe50
A single texture can statically appear in code mixed with a shadow sampler and a non-shadow sampler. This would be create invalid SPIR-V, unless one of them is provably dead. The previous detection of this happened before DCE, so some shaders would trigger the error even though they wouldn't after DCE. To handle that case, this PR splits the texture into two: one with each mode. It sets "needsLegalization" (if that happens for any texture) to warn that this shader will need post-compilation legalization. If the texture is only used with one of the two modes, behavior is as it was before.
Glslang Tests based on the Google Test Framework
This directory contains Google Test based test fixture and test cases for glslang.
Apart from typical unit tests, necessary utility methods are added into
the GlslangTests fixture to provide the ability to do
file-based integration tests. Various *.FromFile.cpp files lists names
of files containing input shader code in the Test/ directory. Utility
methods will load the input shader source, compile them, and compare with
the corresponding expected output in the Test/baseResults/ directory.
How to run the tests
Please make sure you have a copy of Google Test checked out under
the External directory before building. After building, just run the
ctest command or the gtests/glslangtests binary in your build directory.
The gtests/glslangtests binary also provides an --update-mode command
line option, which, if supplied, will overwrite the golden files under
the Test/baseResults/ directory with real output from that invocation.
This serves as an easy way to update golden files.