Simpify PassRunner.add() and automatically parallelize parallel functions (#2242)

Main change here is in pass.h, everything else is changes to work with the new API.

The add("name") remains as before, while the weird variadic add(..) which constructed the pass now just gets a std::unique_ptr of a pass. This also makes the memory management internally fully automatic. And it makes it trivial to parallelize WalkerPass::run on parallel passes.

As a benefit, this allows removing a lot of code since in many cases there is no need to create a new pass runner, and running a pass can be just a single line.

1 files changed, 1 insertions, 4 deletions

diff --git a/src/passes/FuncCastEmulation.cpp b/src/passes/FuncCastEmulation.cpp
index b4e600b31..9d6923703 100644
--- a/src/passes/FuncCastEmulation.cpp
+++ b/src/passes/FuncCastEmulation.cpp
@@ -185,10 +185,7 @@ struct FuncCastEmulation : public Pass {
       }
     }
     // update call_indirects
-    PassRunner subRunner(module, runner->options);
-    subRunner.setIsNested(true);
-    subRunner.add<ParallelFuncCastEmulation>(ABIType);
-    subRunner.run();
+    ParallelFuncCastEmulation(ABIType).run(runner, module);
   }
 
 private: