[OPS] Add performance model for gemm/gemv (#397)

Significantly improves the performance of `triton.ops.matmul` in memory-bound settings via the use of many more block configs coupled with a performance model to drive the auto-tuning process.

lib/codegen/pass.cc

@@ -52,7 +52,7 @@ std::unique_ptr<llvm::Module> add_passes_to_emit_bin(ir::module &ir, llvm::LLVMC
   peephole.run(ir);
   dce.run(ir);
   pipeline.run(ir);
-  dce.run(ir);
+  dce.run(ir);  
   disassociate.run(ir);
   dce.run(ir);
   align.run(ir);
@@ -85,6 +85,7 @@ std::unique_ptr<llvm::Module> add_passes_to_emit_bin(ir::module &ir, llvm::LLVMC
   allocation.run(ir);
   prefetch_s.run(ir);
   barriers.run(ir);
+  // ir.print(std::cout);
   isel.visit(ir, *llvm);
   shared_static = allocation.allocated_size();
   return llvm;

lib/codegen/transform/cts.cc

@@ -94,4 +94,4 @@ void cts::run(ir::module &mod) {
 
 }
 }
-}
+}

lib/codegen/transform/pipeline.cc

@@ -327,4 +327,4 @@ void pipeline::run(ir::module &mod) {
 
 }
 }
-}
+}