[PATCH] D77364: [mlir][Linalg] Employ finer-grained control of C interface emission

[Nicolas Vasilache via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGe33a636e2634: [mlir][Linalg] Employ finer-grained control of C interface emission (authored by nicolasvasilache).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D77364/new/

https://reviews.llvm.org/D77364

Files:
  mlir/lib/Conversion/LinalgToLLVM/LinalgToLLVM.cpp
  mlir/test/mlir-cpu-runner/unranked_memref.mlir
  mlir/test/mlir-cpu-runner/utils.mlir


Index: mlir/test/mlir-cpu-runner/utils.mlir
===================================================================
--- mlir/test/mlir-cpu-runner/utils.mlir
+++ mlir/test/mlir-cpu-runner/utils.mlir
@@ -50,7 +50,7 @@
 //    PRINT-3D-NEXT: 2,    2,    4,    2,    2
 //    PRINT-3D-NEXT: 2,    2,    2,    2,    2
 
-func @print_memref_f32(memref<*xf32>)
+func @print_memref_f32(memref<*xf32>) attributes { llvm.emit_c_interface }
 
 !vector_type_C = type vector<4x4xf32>
 !matrix_type_CC = type memref<1x1x!vector_type_C>
@@ -71,4 +71,4 @@
 // PRINT-VECTOR-SPLAT-2D: Memref base@ = {{.*}} rank = 2 offset = 0 sizes = [1, 1] strides = [1, 1] data =
 // PRINT-VECTOR-SPLAT-2D-NEXT: [((10, 10, 10, 10),   (10, 10, 10, 10),   (10, 10, 10, 10),   (10, 10, 10, 10))]
 
-func @print_memref_vector_4x4xf32(memref<?x?x!vector_type_C>)
+func @print_memref_vector_4x4xf32(memref<?x?x!vector_type_C>) attributes { llvm.emit_c_interface }
Index: mlir/test/mlir-cpu-runner/unranked_memref.mlir
===================================================================
--- mlir/test/mlir-cpu-runner/unranked_memref.mlir
+++ mlir/test/mlir-cpu-runner/unranked_memref.mlir
@@ -55,5 +55,5 @@
     return
 }
 
-func @print_memref_i8(memref<*xi8>)
-func @print_memref_f32(memref<*xf32>)
+func @print_memref_i8(memref<*xi8>) attributes { llvm.emit_c_interface }
+func @print_memref_f32(memref<*xf32>) attributes { llvm.emit_c_interface }
Index: mlir/lib/Conversion/LinalgToLLVM/LinalgToLLVM.cpp
===================================================================
--- mlir/lib/Conversion/LinalgToLLVM/LinalgToLLVM.cpp
+++ mlir/lib/Conversion/LinalgToLLVM/LinalgToLLVM.cpp
@@ -400,8 +400,13 @@
   // Insert before module terminator.
   rewriter.setInsertionPoint(module.getBody(),
                              std::prev(module.getBody()->end()));
-  rewriter.create<FuncOp>(op->getLoc(), fnNameAttr.getValue(), libFnType,
-                          ArrayRef<NamedAttribute>{});
+  FuncOp funcOp =
+      rewriter.create<FuncOp>(op->getLoc(), fnNameAttr.getValue(), libFnType,
+                              ArrayRef<NamedAttribute>{});
+  // Insert a function attribute that will trigger the emission of the
+  // corresponding `_mlir_ciface_xxx` interface so that external libraries see
+  // a normalized ABI. This interface is added during std to llvm conversion.
+  funcOp.setAttr("llvm.emit_c_interface", UnitAttr::get(op->getContext()));
   return fnNameAttr;
 }
 
@@ -573,8 +578,7 @@
   LLVMTypeConverter converter(&getContext());
   populateAffineToStdConversionPatterns(patterns, &getContext());
   populateLoopToStdConversionPatterns(patterns, &getContext());
-  populateStdToLLVMConversionPatterns(converter, patterns, /*useAlloca=*/false,
-                                      /*emitCWrappers=*/true);
+  populateStdToLLVMConversionPatterns(converter, patterns);
   populateVectorToLLVMMatrixConversionPatterns(converter, patterns);
   populateVectorToLLVMConversionPatterns(converter, patterns);
   populateLinalgToStandardConversionPatterns(patterns, &getContext());


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