llvm-project

6c813e8a - [mlir][ROCDL] Add fp4 and fp6 conversion intrinsics, fix fp8 immargs (#140801)

[mlir][ROCDL] Add fp4 and fp6 conversion intrinsics, fix fp8 immargs (#140801) This PR adds support for the scaled conversion intrinsics for fp4 and fp6 types so that they can be targetted by a future amdgpu dialect op or used directly. Additionally, this patch refactors the copy-paste-heavy fp8 versions of these scaled conversion intrinsics with tablegen `foreach` loops, and fixes the fact that certain immargs weren't being stored as attributes. Note that some of the MLIR-level tests for those scaled fp8 intrinsics had incorrect return types, which have been fixed. (Note that while the operations have a known return type, the IR format still prints that type for clarity).