[PATCH] Fix incorrect example for insertvalue instruction in LangRef

[Sean Silva]

LGTM.

On Mon, Sep 8, 2014 at 2:20 AM, Dan Liew <dan at su-root.co.uk> wrote:

> Hi Sean,
>
> This patch fixes a mistake in the insertvalue instruction example.
> Trying to assemble this with llvm-as
>
> ```
> define void @main(float %val)
> {
>     %agg1 = insertvalue {i32, float} undef, i32 1, 0              ;
> yields {i32 1, float undef}
>     %agg2 = insertvalue {i32, float} %agg1, float %val, 1         ;
> yields {i32 1, float %val}
>     %agg3 = insertvalue {i32, {float}} %agg1, float %val, 1, 0    ;
> yields {i32 undef, float %val}
>     ret void
> }
> ```
>
> gives the following error
>
> ```
> llvm-as: agg.ll:5:40: error: '%agg1' defined with type '{ i32, float }'
>     %agg3 = insertvalue {i32, {float}} %agg1, float %val, 1, 0    ;
> yields {i32 undef, float %val}
> ```
>
> Which isn't surprising because {i32, {float}} and {i32, float} are not
> the same type.
>
> Using my modified version assembles without error so I think what I've
> done is correct.
>
> Is this okay to commit?
>
> Thanks,
> Dan.
>
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