[llvm-dev] LLVM-IR: order of a PHI node predecessors ?

[Krzysztof Parzyszek via llvm-dev]

There are no requirements regarding the ordering of PHI node arguments 
(i.e. block/value pairs). The code you showed is valid.

-Krzysztof


On 8/3/2017 8:02 AM, Jeroen Dobbelaere via llvm-dev wrote:
> Hi all,
> 
> are there any restrictions on the order of a PHI node predecessors ?
> 
> Like following example, is this still valid LLVM-IR ?
> 
> ---
> for.body:                                         ; preds = %for.body, %entry
>    %lsr.iv43 = phi i32 [ %lsr.iv.next44, %for.body ], [ 0, %entry ]
>    %i.032 = phi i32 [ 0, %entry ], [ %inc, %for.body ]                           ; %entry and %for.body reversed
> ---
> 
> Greetings,
> 
> Jeroen Dobbelaere
> 
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