[mlir][Pass] Add a tablegen backend for defining Pass information

This will greatly simplify a number of things related to passes:
* Enables generation of pass registration
* Enables generation of boiler plate pass utilities
* Enables generation of pass documentation

This revision focuses on adding the basic structure and adds support for generating the registration for passes in the Transforms/ directory. Future revisions will add more support and move more passes over.

Differential Revision: https://reviews.llvm.org/D76656

1 files changed, 0 insertions, 4 deletions

diff --git a/mlir/lib/Transforms/LoopInvariantCodeMotion.cpp b/mlir/lib/Transforms/LoopInvariantCodeMotion.cpp
index e616663..3092248 100644
--- a/mlir/lib/Transforms/LoopInvariantCodeMotion.cpp
+++ b/mlir/lib/Transforms/LoopInvariantCodeMotion.cpp
@@ -121,7 +121,3 @@ void LoopInvariantCodeMotion::runOnOperation() {
 std::unique_ptr<Pass> mlir::createLoopInvariantCodeMotionPass() {
   return std::make_unique<LoopInvariantCodeMotion>();
 }
-
-static PassRegistration<LoopInvariantCodeMotion>
-    pass("loop-invariant-code-motion",
-         "Hoist loop invariant instructions outside of the loop");