[enco] Introduce FreeInstrEliminationPass (#3063)

This commit introduces FreeInstrEliminationPass and uses
it for compilation.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>

diff --git a/contrib/enco/core/src/Backend.cpp b/contrib/enco/core/src/Backend.cpp
index 6165bba..b917307 100644 (file)
--- a/contrib/enco/core/src/Backend.cpp
+++ b/contrib/enco/core/src/Backend.cpp
@@ -122,6 +122,7 @@ void BackendImpl::compile(coco::Module *m, coco::Data *d)
   // Lower ConcatF as Shuffle if it is not delegated to NNAPI yet
   pipeline.append(make_unique<ConcatLoweringPass>());
   pipeline.append(make_unique<BypassGenerationPass>());
+  pipeline.append(make_unique<FreeInstrEliminationPass>());
 
   // Apply transforms in the pipeline
   for (uint32_t n = 0; n < pipeline.size(); ++n)
@@ -140,7 +141,6 @@ void BackendImpl::compile(coco::Module *m, coco::Data *d)
   // that share the same bag as their underlying bag
   assert(!has_inout_bag(code(sess)->module()));
 
-  eliminate_free_instr(code(sess));
   // NOTE Free Op Elimination should be applied after Free Instr Elimination
   //      - Free Instr Elimination may generate additional free Op(s)
   eliminate_free_op(code(sess));

diff --git a/contrib/enco/core/src/Transforms/FreeInstrElimination.h b/contrib/enco/core/src/Transforms/FreeInstrElimination.h
index 46bb30d..1d311cd 100644 (file)
--- a/contrib/enco/core/src/Transforms/FreeInstrElimination.h
+++ b/contrib/enco/core/src/Transforms/FreeInstrElimination.h
@@ -18,6 +18,7 @@
 #define __ENCO_TRANSFORM_FREE_INSTR_ELIMINATION_H__
 
 #include "Code.h"
+#include "Pass.h"
 
 namespace enco
 {
@@ -38,6 +39,16 @@ static inline void eliminate_free_instr(enco::Code *code)
   eliminate_free_instr(code->module());
 }
 
+struct FreeInstrEliminationPass final : public Pass
+{
+  PASS_CTOR(FreeInstrEliminationPass)
+  {
+    // DO NOTHING
+  }
+
+  void run(const SessionID &sess) const override { eliminate_free_instr(code(sess)); }
+};
+
 } // namespace enco
 
 #endif // __ENCO_TRANSFORM_FREE_INSTR_ELIMINATION_H__