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JIT/wasm: bail R2R for calls passing 16-byte SIMD by value #129816

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Merged
AndyAyersMS merged 1 commit into from
Jun 25, 2026
+7 −0
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JIT/wasm: bail R2R for calls passing 16-byte SIMD by value #129816

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7 changes: 7 additions & 0 deletions src/coreclr/jit/codegenwasm.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2790,6 +2790,13 @@ void CodeGen::genCallInstruction(GenTreeCall* call)
assert(seg.IsPassedInRegister());
WasmValueType wvt = WasmRegToType(seg.GetRegister());
assert(wvt < WasmValueType::Count);
if (wvt == WasmValueType::V128)
{
// Passing a 16-byte SIMD value by value through a call is not yet correctly
// implemented: the argument is materialized as an i32 (by-ref) while the call
// signature requires v128, producing an invalid module. Bail for now.
NYI_WASM_SIMD("SIMD16 call argument");
}
typeStack.Push((CorInfoWasmType)emitter::GetWasmValueTypeCode(wvt));
}
}
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