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[mlir][Transforms] OneToNTypeConversion.cpp: Fix invalid IR #77922

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Merged
merged 1 commit into from
Jan 14, 2024
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[mlir][Transforms] OneToNTypeConversion.cpp: Fix invalid IR #77922

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5 changes: 5 additions & 0 deletions mlir/lib/Transforms/Utils/OneToNTypeConversion.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -113,6 +113,11 @@ static const char *const castKindAttrName =
/// result types. Returns the result values of the cast.
static ValueRange buildUnrealizedCast(OpBuilder &builder, TypeRange resultTypes,
ValueRange inputs, CastKind kind) {
// Special case: 1-to-N conversion with N = 0. No need to build an
// UnrealizedConversionCastOp because the op will always be dead.
if (resultTypes.empty())
return ValueRange();

// Create cast.
Location loc = builder.getUnknownLoc();
if (!inputs.empty())
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