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[mlir][memref] Unranked support for extract_aligned_pointer_as_index #93908

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Merged
merged 1 commit into from
Jun 13, 2024
Merged

[mlir][memref] Unranked support for extract_aligned_pointer_as_index #93908

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2 changes: 1 addition & 1 deletion mlir/include/mlir/Dialect/MemRef/IR/MemRefOps.td
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Original file line number Diff line number Diff line change
Expand Up @@ -892,7 +892,7 @@ def MemRef_ExtractAlignedPointerAsIndexOp :
}];

let arguments = (ins
AnyStridedMemRef:$source
AnyRankedOrUnrankedMemRef:$source
);
let results = (outs Index:$aligned_pointer);

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22 changes: 19 additions & 3 deletions mlir/lib/Conversion/MemRefToLLVM/MemRefToLLVM.cpp
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Expand Up @@ -1590,10 +1590,26 @@ class ConvertExtractAlignedPointerAsIndex
matchAndRewrite(memref::ExtractAlignedPointerAsIndexOp extractOp,
OpAdaptor adaptor,
ConversionPatternRewriter &rewriter) const override {
MemRefDescriptor desc(adaptor.getSource());
BaseMemRefType sourceTy = extractOp.getSource().getType();

Value alignedPtr;
if (sourceTy.hasRank()) {
MemRefDescriptor desc(adaptor.getSource());
alignedPtr = desc.alignedPtr(rewriter, extractOp->getLoc());
} else {
auto elementPtrTy = LLVM::LLVMPointerType::get(
rewriter.getContext(), sourceTy.getMemorySpaceAsInt());

UnrankedMemRefDescriptor desc(adaptor.getSource());
Value descPtr = desc.memRefDescPtr(rewriter, extractOp->getLoc());

alignedPtr = UnrankedMemRefDescriptor::alignedPtr(
rewriter, extractOp->getLoc(), *getTypeConverter(), descPtr,
elementPtrTy);
}

rewriter.replaceOpWithNewOp<LLVM::PtrToIntOp>(
extractOp, getTypeConverter()->getIndexType(),
desc.alignedPtr(rewriter, extractOp->getLoc()));
extractOp, getTypeConverter()->getIndexType(), alignedPtr);
return success();
}
};
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15 changes: 15 additions & 0 deletions mlir/test/Conversion/MemRefToLLVM/memref-to-llvm.mlir
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Expand Up @@ -598,6 +598,21 @@ func.func @extract_aligned_pointer_as_index(%m: memref<?xf32>) -> index {

// -----

// CHECK-LABEL: func @extract_aligned_pointer_as_index_unranked
func.func @extract_aligned_pointer_as_index_unranked(%m: memref<*xf32>) -> index {
%0 = memref.extract_aligned_pointer_as_index %m: memref<*xf32> -> index
// CHECK: %[[PTR:.*]] = llvm.extractvalue %{{.*}}[1] : !llvm.struct<(i64, ptr)>
// CHECK: %[[ALIGNED_FIELD:.*]] = llvm.getelementptr %[[PTR]][1] : (!llvm.ptr) -> !llvm.ptr, !llvm.ptr
// CHECK: %[[ALIGNED_PTR:.*]] = llvm.load %[[ALIGNED_FIELD]] : !llvm.ptr -> !llvm.ptr
// CHECK: %[[I64:.*]] = llvm.ptrtoint %[[ALIGNED_PTR]] : !llvm.ptr to i64
// CHECK: %[[R:.*]] = builtin.unrealized_conversion_cast %[[I64]] : i64 to index

// CHECK: return %[[R]] : index
return %0: index
}

// -----

// CHECK-LABEL: func @extract_strided_metadata(
// CHECK-SAME: %[[ARG:.*]]: memref
// CHECK: %[[MEM_DESC:.*]] = builtin.unrealized_conversion_cast %[[ARG]] : memref<?x?xf32, strided<[?, ?], offset: ?>> to !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
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13 changes: 13 additions & 0 deletions mlir/test/Dialect/MemRef/expand-strided-metadata.mlir
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Expand Up @@ -899,6 +899,19 @@ func.func @extract_aligned_pointer_as_index(%arg0: memref<f32>) -> index {

// -----

// CHECK-LABEL: extract_aligned_pointer_as_index_of_unranked_source
// CHECK-SAME: (%[[ARG0:.*]]: memref<*xf32>
func.func @extract_aligned_pointer_as_index_of_unranked_source(%arg0: memref<*xf32>) -> index {
// CHECK: %[[I:.+]] = memref.extract_aligned_pointer_as_index %[[ARG0]] : memref<*xf32> -> index
// CHECK: return %[[I]]

%r = memref.reinterpret_cast %arg0 to offset: [0], sizes: [], strides: [] : memref<*xf32> to memref<f32>
%i = memref.extract_aligned_pointer_as_index %r : memref<f32> -> index
return %i : index
}

// -----

// Check that we simplify collapse_shape into
// reinterpret_cast(extract_strided_metadata) + <some math>
//
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