replace greedy pattern rewrites with partial conversions

better failure messages

src/PIM/Conversion/ONNXToSpatial/ONNXToSpatialPass.cpp

@@ -5,15 +5,12 @@
 #include "mlir/IR/IRMapping.h"
 #include "mlir/Pass/Pass.h"
 #include "mlir/Pass/PassManager.h"
-#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
 #include "mlir/Transforms/Passes.h"
 
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/Support/Debug.h"
 
 #include "Common/Common.hpp"
 #include "Common/PimCommon.hpp"
-#include "src/Accelerators/PIM/Common/PimCommon.hpp"
 #include "src/Accelerators/PIM/Compiler/PimCompilerOptions.hpp"
 #include "src/Accelerators/PIM/Conversion/ONNXToSpatial/ConversionPatterns.hpp"
 #include "src/Accelerators/PIM/Conversion/ONNXToSpatial/HostLegality.hpp"
@@ -91,13 +88,25 @@ void ONNXToSpatialPass::runOnOperation() {
   ModuleOp moduleOp = getOperation();
   MLIRContext* ctx = &getContext();
 
+  ConversionTarget preTarget(*ctx);
+  preTarget.addLegalDialect<spatial::SpatialDialect,
+                            ONNXDialect,
+                            tensor::TensorDialect,
+                            arith::ArithDialect,
+                            scf::SCFDialect>();
+  preTarget.addIllegalOp<ONNXConstantOp, ONNXMatMulOp, ONNXFlattenOp>();
+
   RewritePatternSet prePatterns(ctx);
   populatePrePatterns(prePatterns, ctx);
-  if (failed(applyPatternsGreedily(moduleOp, std::move(prePatterns))))
-    moduleOp.emitWarning("failed to apply ONNX-to-Spatial pre-patterns; continuing");
+  if (failed(applyPartialConversion(moduleOp, preTarget, std::move(prePatterns)))) {
+    moduleOp.emitError("failed to apply ONNX-to-Spatial pre-rewrites");
+    signalPassFailure();
+    return;
+  }
 
   auto entryFunc = getPimEntryFunc(moduleOp);
   if (failed(entryFunc)) {
+    moduleOp.emitError("failed to locate the PIM entry function during ONNX-to-Spatial lowering");
     signalPassFailure();
     return;
   }
@@ -130,13 +139,24 @@ void ONNXToSpatialPass::runOnOperation() {
   RewritePatternSet conversionPatterns(ctx);
   populateConversionPatterns(conversionPatterns, ctx);
   if (failed(applyPartialConversion(moduleOp, target, std::move(conversionPatterns)))) {
+    moduleOp.emitError("failed to convert required ONNX ops to Spatial ops");
     signalPassFailure();
     return;
   }
 
+  ConversionTarget earlyPostTarget(*ctx);
+  earlyPostTarget.addLegalDialect<spatial::SpatialDialect,
+                                  ONNXDialect,
+                                  tensor::TensorDialect,
+                                  arith::ArithDialect,
+                                  scf::SCFDialect>();
+  earlyPostTarget.addDynamicallyLegalOp<spatial::SpatComputeBatch>(
+    [](spatial::SpatComputeBatch batchOp) { return !requiresEarlyPostRewrite(batchOp); });
+
   RewritePatternSet earlyPostPatterns(ctx);
   populateEarlyPostPatterns(earlyPostPatterns, ctx);
-  if (failed(applyPatternsGreedily(*entryFunc, std::move(earlyPostPatterns)))) {
+  if (failed(applyPartialConversion(*entryFunc, earlyPostTarget, std::move(earlyPostPatterns)))) {
+    moduleOp.emitError("failed to normalize single-lane spat.compute_batch ops before core assignment checks");
     signalPassFailure();
     return;
   }
@@ -162,14 +182,27 @@ void ONNXToSpatialPass::runOnOperation() {
 
   annotateWeightsConstants(*entryFunc);
 
+  ConversionTarget postTarget(*ctx);
+  postTarget.addLegalDialect<spatial::SpatialDialect,
+                             ONNXDialect,
+                             tensor::TensorDialect,
+                             arith::ArithDialect,
+                             scf::SCFDialect>();
+  postTarget.addDynamicallyLegalOp<spatial::SpatCompute>(
+    [](spatial::SpatCompute computeOp) { return !requiresPostRewrite(computeOp); });
+  postTarget.addDynamicallyLegalOp<spatial::SpatComputeBatch>(
+    [](spatial::SpatComputeBatch computeOp) { return !requiresPostRewrite(computeOp); });
+
   RewritePatternSet postPatterns(ctx);
   populatePostPatterns(postPatterns, ctx);
-  if (failed(applyPatternsGreedily(*entryFunc, std::move(postPatterns)))) {
+  if (failed(applyPartialConversion(*entryFunc, postTarget, std::move(postPatterns)))) {
+    moduleOp.emitError("failed to normalize weight-like Spatial compute operands before Spatial-to-PIM lowering");
     signalPassFailure();
     return;
   }
 
   if (failed(verifyONNXToSpatialHostLegality(*entryFunc))) {
+    moduleOp.emitError("ONNX-to-Spatial host legality verification failed");
     signalPassFailure();
     return;
   }