microsoft
New include path behaviour
Description
Due to #6317 include paths are now passed to IDxcIncludeHandler::LoadSource normalized to the operating system's path style. i.e. On Windows "/" is replaced with "\".
The issue with this is that it likely breaks some implementations of IDxcIncludeHandler because users have been expecting the argument of IDxcIncludeHandler::LoadSource to be exactly what was in the include directive in the shader source. There are not many programmers who would prefer to write "\" over "/" in their header includes, so for some, upgrading to 1.8.2405.17 will have broken their include handler.
Steps to Reproduce
Write a shader that has an include such as #include "Mylibrary/MyHeader.hlsli" and compile it with DXC using a custom IDxcIncludeHandler.
Actual Behavior
Notice that the string passed to IDxcIncludeHandler::LoadSource is ".\\MyLibrary\\Myheader.hlsli" which is different from the string used in the #include directive
Environment
- DXC version 1.8.2405.17
- Host Operating System Windows 10 Pro 22H2
