Making it easier to work with shaders https://git.yummers.dev/slang.git/atom?h=master 2021-05-27T20:40:17+00:00 2021-05-27T20:40:17+00:00 T. Foley tfoleyNV@users.noreply.github.com 2021-05-27T20:40:17+00:00 urn:sha1:63dcc7acf4784d95407866730a70f5d37d391b88 During lowering from AST to IR, the Slang compiler translates code that uses `struct` inheritance: ```hlsl struct Base { int a; } struct Derived : Base {} ``` into code where the inheritance relationship is "witnessed" by a simple field: ```hlsl struct Base { int a; } struct Derived { Base __anonymous_field__; } ``` The underlying bug here is that the `__anonymous_field__` that the compiler generated during IR lowering was not being given any linkage decorations (no mangled name). As a result, if multiple separately-compiled modules all access that field they could disagree on its identity as an IR instruction. This could lead to output code being generated where the declaration of `__anonymous_field__` uses one IR instruction, but accesses use another. This change includes a fix for the issue, and a test that serves as a reproducer for the original problem.