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-rw-r--r--mlir/lib/Conversion/VectorToLLVM/ConvertVectorToLLVM.cpp169
1 files changed, 114 insertions, 55 deletions
diff --git a/mlir/lib/Conversion/VectorToLLVM/ConvertVectorToLLVM.cpp b/mlir/lib/Conversion/VectorToLLVM/ConvertVectorToLLVM.cpp
index 17fb93396d9..d4c27a69fb5 100644
--- a/mlir/lib/Conversion/VectorToLLVM/ConvertVectorToLLVM.cpp
+++ b/mlir/lib/Conversion/VectorToLLVM/ConvertVectorToLLVM.cpp
@@ -61,6 +61,38 @@ static VectorType reducedVectorTypeBack(VectorType tp) {
return VectorType::get(tp.getShape().take_back(), tp.getElementType());
}
+// Helper that picks the proper sequence for inserting.
+static Value *insertOne(ConversionPatternRewriter &rewriter,
+ LLVMTypeConverter &lowering, Location loc, Value *val1,
+ Value *val2, Type llvmType, int64_t rank, int64_t pos) {
+ if (rank == 1) {
+ auto idxType = rewriter.getIndexType();
+ auto constant = rewriter.create<LLVM::ConstantOp>(
+ loc, lowering.convertType(idxType),
+ rewriter.getIntegerAttr(idxType, pos));
+ return rewriter.create<LLVM::InsertElementOp>(loc, llvmType, val1, val2,
+ constant);
+ }
+ return rewriter.create<LLVM::InsertValueOp>(loc, llvmType, val1, val2,
+ rewriter.getI64ArrayAttr(pos));
+}
+
+// Helper that picks the proper sequence for extracting.
+static Value *extractOne(ConversionPatternRewriter &rewriter,
+ LLVMTypeConverter &lowering, Location loc, Value *val,
+ Type llvmType, int64_t rank, int64_t pos) {
+ if (rank == 1) {
+ auto idxType = rewriter.getIndexType();
+ auto constant = rewriter.create<LLVM::ConstantOp>(
+ loc, lowering.convertType(idxType),
+ rewriter.getIntegerAttr(idxType, pos));
+ return rewriter.create<LLVM::ExtractElementOp>(loc, llvmType, val,
+ constant);
+ }
+ return rewriter.create<LLVM::ExtractValueOp>(loc, llvmType, val,
+ rewriter.getI64ArrayAttr(pos));
+}
+
class VectorBroadcastOpConversion : public LLVMOpLowering {
public:
explicit VectorBroadcastOpConversion(MLIRContext *context,
@@ -77,11 +109,12 @@ public:
return matchFailure();
// Rewrite when the full vector type can be lowered (which
// implies all 'reduced' types can be lowered too).
+ auto adaptor = vector::BroadcastOpOperandAdaptor(operands);
VectorType srcVectorType =
broadcastOp.getSourceType().dyn_cast<VectorType>();
rewriter.replaceOp(
- op, expandRanks(operands[0], // source value to be expanded
- op->getLoc(), // location of original broadcast
+ op, expandRanks(adaptor.source(), // source value to be expanded
+ op->getLoc(), // location of original broadcast
srcVectorType, dstVectorType, rewriter));
return matchSuccess();
}
@@ -142,7 +175,8 @@ private:
assert((llvmType != nullptr) && "unlowerable vector type");
if (rank == 1) {
Value *undef = rewriter.create<LLVM::UndefOp>(loc, llvmType);
- Value *expand = insertOne(undef, value, loc, llvmType, rank, 0, rewriter);
+ Value *expand =
+ insertOne(rewriter, lowering, loc, undef, value, llvmType, rank, 0);
SmallVector<int32_t, 4> zeroValues(dim, 0);
return rewriter.create<LLVM::ShuffleVectorOp>(
loc, expand, undef, rewriter.getI32ArrayAttr(zeroValues));
@@ -152,7 +186,8 @@ private:
reducedVectorTypeFront(dstVectorType), rewriter);
Value *result = rewriter.create<LLVM::UndefOp>(loc, llvmType);
for (int64_t d = 0; d < dim; ++d) {
- result = insertOne(result, expand, loc, llvmType, rank, d, rewriter);
+ result =
+ insertOne(rewriter, lowering, loc, result, expand, llvmType, rank, d);
}
return result;
}
@@ -182,62 +217,86 @@ private:
Value *result = rewriter.create<LLVM::UndefOp>(loc, llvmType);
bool atStretch = dim != srcVectorType.getDimSize(0);
if (rank == 1) {
+ assert(atStretch);
Type redLlvmType = lowering.convertType(dstVectorType.getElementType());
- if (atStretch) {
- Value *one = extractOne(value, loc, redLlvmType, rank, 0, rewriter);
- Value *expand =
- insertOne(result, one, loc, llvmType, rank, 0, rewriter);
- SmallVector<int32_t, 4> zeroValues(dim, 0);
- return rewriter.create<LLVM::ShuffleVectorOp>(
- loc, expand, result, rewriter.getI32ArrayAttr(zeroValues));
- }
- for (int64_t d = 0; d < dim; ++d) {
- Value *one = extractOne(value, loc, redLlvmType, rank, d, rewriter);
- result = insertOne(result, one, loc, llvmType, rank, d, rewriter);
- }
- } else {
- VectorType redSrcType = reducedVectorTypeFront(srcVectorType);
- VectorType redDstType = reducedVectorTypeFront(dstVectorType);
- Type redLlvmType = lowering.convertType(redSrcType);
- for (int64_t d = 0; d < dim; ++d) {
- int64_t pos = atStretch ? 0 : d;
- Value *one = extractOne(value, loc, redLlvmType, rank, pos, rewriter);
- Value *expand = expandRanks(one, loc, redSrcType, redDstType, rewriter);
- result = insertOne(result, expand, loc, llvmType, rank, d, rewriter);
- }
+ Value *one =
+ extractOne(rewriter, lowering, loc, value, redLlvmType, rank, 0);
+ Value *expand =
+ insertOne(rewriter, lowering, loc, result, one, llvmType, rank, 0);
+ SmallVector<int32_t, 4> zeroValues(dim, 0);
+ return rewriter.create<LLVM::ShuffleVectorOp>(
+ loc, expand, result, rewriter.getI32ArrayAttr(zeroValues));
+ }
+ VectorType redSrcType = reducedVectorTypeFront(srcVectorType);
+ VectorType redDstType = reducedVectorTypeFront(dstVectorType);
+ Type redLlvmType = lowering.convertType(redSrcType);
+ for (int64_t d = 0; d < dim; ++d) {
+ int64_t pos = atStretch ? 0 : d;
+ Value *one =
+ extractOne(rewriter, lowering, loc, value, redLlvmType, rank, pos);
+ Value *expand = expandRanks(one, loc, redSrcType, redDstType, rewriter);
+ result =
+ insertOne(rewriter, lowering, loc, result, expand, llvmType, rank, d);
}
return result;
}
+};
- // Picks the proper sequence for inserting.
- Value *insertOne(Value *val1, Value *val2, Location loc, Type llvmType,
- int64_t rank, int64_t pos,
- ConversionPatternRewriter &rewriter) const {
- if (rank == 1) {
- auto idxType = rewriter.getIndexType();
- auto constant = rewriter.create<LLVM::ConstantOp>(
- loc, lowering.convertType(idxType),
- rewriter.getIntegerAttr(idxType, pos));
- return rewriter.create<LLVM::InsertElementOp>(loc, llvmType, val1, val2,
- constant);
+class VectorShuffleOpConversion : public LLVMOpLowering {
+public:
+ explicit VectorShuffleOpConversion(MLIRContext *context,
+ LLVMTypeConverter &typeConverter)
+ : LLVMOpLowering(vector::ShuffleOp::getOperationName(), context,
+ typeConverter) {}
+
+ PatternMatchResult
+ matchAndRewrite(Operation *op, ArrayRef<Value *> operands,
+ ConversionPatternRewriter &rewriter) const override {
+ auto loc = op->getLoc();
+ auto adaptor = vector::ShuffleOpOperandAdaptor(operands);
+ auto shuffleOp = cast<vector::ShuffleOp>(op);
+ auto v1Type = shuffleOp.getV1VectorType();
+ auto v2Type = shuffleOp.getV2VectorType();
+ auto vectorType = shuffleOp.getVectorType();
+ Type llvmType = lowering.convertType(vectorType);
+ auto maskArrayAttr = shuffleOp.mask();
+
+ // Bail if result type cannot be lowered.
+ if (!llvmType)
+ return matchFailure();
+
+ // Get rank and dimension sizes.
+ int64_t rank = vectorType.getRank();
+ assert(v1Type.getRank() == rank);
+ assert(v2Type.getRank() == rank);
+ int64_t v1Dim = v1Type.getDimSize(0);
+
+ // For rank 1, where both operands have *exactly* the same vector type,
+ // there is direct shuffle support in LLVM. Use it!
+ if (rank == 1 && v1Type == v2Type) {
+ Value *shuffle = rewriter.create<LLVM::ShuffleVectorOp>(
+ loc, adaptor.v1(), adaptor.v2(), maskArrayAttr);
+ rewriter.replaceOp(op, shuffle);
+ return matchSuccess();
}
- return rewriter.create<LLVM::InsertValueOp>(loc, llvmType, val1, val2,
- rewriter.getI64ArrayAttr(pos));
- }
- // Picks the proper sequence for extracting.
- Value *extractOne(Value *value, Location loc, Type llvmType, int64_t rank,
- int64_t pos, ConversionPatternRewriter &rewriter) const {
- if (rank == 1) {
- auto idxType = rewriter.getIndexType();
- auto constant = rewriter.create<LLVM::ConstantOp>(
- loc, lowering.convertType(idxType),
- rewriter.getIntegerAttr(idxType, pos));
- return rewriter.create<LLVM::ExtractElementOp>(loc, llvmType, value,
- constant);
+ // For all other cases, insert the individual values individually.
+ Value *insert = rewriter.create<LLVM::UndefOp>(loc, llvmType);
+ int64_t insPos = 0;
+ for (auto en : llvm::enumerate(maskArrayAttr)) {
+ int64_t extPos = en.value().cast<IntegerAttr>().getInt();
+ Value *value = adaptor.v1();
+ if (extPos >= v1Dim) {
+ extPos -= v1Dim;
+ value = adaptor.v2();
+ }
+ Value *extract =
+ extractOne(rewriter, lowering, loc, value, llvmType, rank, extPos);
+ insert = insertOne(rewriter, lowering, loc, insert, extract, llvmType,
+ rank, insPos++);
}
- return rewriter.create<LLVM::ExtractValueOp>(loc, llvmType, value,
- rewriter.getI64ArrayAttr(pos));
+ rewriter.replaceOp(op, insert);
+ return matchSuccess();
}
};
@@ -506,9 +565,9 @@ public:
/// Populate the given list with patterns that convert from Vector to LLVM.
void mlir::populateVectorToLLVMConversionPatterns(
LLVMTypeConverter &converter, OwningRewritePatternList &patterns) {
- patterns.insert<VectorBroadcastOpConversion, VectorExtractOpConversion,
- VectorInsertOpConversion, VectorOuterProductOpConversion,
- VectorTypeCastOpConversion>(
+ patterns.insert<VectorBroadcastOpConversion, VectorShuffleOpConversion,
+ VectorExtractOpConversion, VectorInsertOpConversion,
+ VectorOuterProductOpConversion, VectorTypeCastOpConversion>(
converter.getDialect()->getContext(), converter);
}
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