llvm-project

6fbc7d3d - [HLSL][SPIR-V] Add `-fspv-enable-maximal-reconvergence` flag to clang dxc. (#163474)

[HLSL][SPIR-V] Add `-fspv-enable-maximal-reconvergence` flag to clang dxc. (#163474) Implement the frontend change to support maximal reconvergence feature. The next work is to generate the corresponding SPIR-V instructions (`OpExtension` and `OpExecutionMode`) based on the llvm ir added in this CL `"enable-maximal-reconvergence"="true"`. Addresses https://github.com/llvm/llvm-project/issues/136930