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[mlir][vector] Add more tests for ConvertVectorToLLVM (1/n) #101936

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Merged
merged 2 commits into from
Aug 8, 2024
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[mlir][vector] Add more tests for ConvertVectorToLLVM (1/n) #101936

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18b4cf4
[mlir][vector] Add more tests for ConvertVectorToLLVM (1/n)
banach-space Aug 4, 2024
f2e1ec8
fixup! [mlir][vector] Add more tests for ConvertVectorToLLVM (1/n)
banach-space Aug 8, 2024
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5 changes: 4 additions & 1 deletion mlir/lib/Dialect/Vector/IR/VectorOps.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2405,7 +2405,10 @@ BroadcastableToResult mlir::vector::isBroadcastableTo(
bool srcDimScalableFlag = srcVectorType.getScalableDims()[dimIdx];
bool dstDimScalableFlag = dstVectorType.getScalableDims()[lead + dimIdx];
if ((srcDim == 1 && srcDimScalableFlag && dstDim != 1) ||
(srcDimScalableFlag != dstDimScalableFlag))
// 1 -> [N] is fine, everything else should be rejected when mixing
// fixed-width and scalable dims
(srcDimScalableFlag != dstDimScalableFlag &&
(srcDim != 1 || srcDimScalableFlag)))
foundMismatchingDims = true;

if (foundMismatchingDims) {
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7 changes: 6 additions & 1 deletion mlir/lib/Dialect/Vector/Transforms/LowerVectorBroadcast.cpp
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Expand Up @@ -125,7 +125,8 @@ class BroadcastOpLowering : public OpRewritePattern<vector::BroadcastOp> {
// ..
// %x = [%a,%b,%c,%d]
VectorType resType =
VectorType::get(dstType.getShape().drop_front(), eltType);
VectorType::get(dstType.getShape().drop_front(), eltType,
dstType.getScalableDims().drop_front());
Value result = rewriter.create<arith::ConstantOp>(
loc, dstType, rewriter.getZeroAttr(dstType));
if (m == 0) {
Expand All @@ -136,6 +137,10 @@ class BroadcastOpLowering : public OpRewritePattern<vector::BroadcastOp> {
result = rewriter.create<vector::InsertOp>(loc, bcst, result, d);
} else {
// Stetch not at start.
if (dstType.getScalableDims()[0]) {
// TODO: For scalable vectors we should emit an scf.for loop.
return failure();
}
for (int64_t d = 0, dim = dstType.getDimSize(0); d < dim; ++d) {
Value ext = rewriter.create<vector::ExtractOp>(loc, op.getSource(), d);
Value bcst = rewriter.create<vector::BroadcastOp>(loc, resType, ext);
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