[llvm-dev] BUILD_VECTOR disambiguation

[Roman Lebedev via llvm-dev]

On Tue, Jul 7, 2020 at 5:52 PM Cameron McInally via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
> Hey devs,
>
> From ISDOpcodes.h...
>
> /// BUILD_VECTOR(ELT0, ELT1, ELT2, ELT3,...) - Return a fixed-width vector
> /// with the specified, possibly variable, elements. The number of elements
> /// is required to be a power of two. The types of the operands must all be
> /// the same and must match the vector element type, except that integer types

> /// The types of the operands must all be the same and must match the vector element type,
^ ?

> /// are allowed to be larger than the element type, in which case the operands
> /// are implicitly truncated.
> BUILD_VECTOR,
>
> Must the operand types always be the same? Or could we see a
> BUILD_VECTOR with mixed integer types? E.g.:
>
> BUILD_VECTOR(i32, i32, i64, i32)
>
> Thanks,
> Cam
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