Re: [PATCH 07/23] hw/block/nvme: Use definition to avoid dynamic stack allocation

[Richard Henderson]

On 5/5/21 7:15 PM, Keith Busch wrote:
> Thank you, that makes sense. In this case, we are talking about an
> integer constant expression for the value of a 'const' symbol. That
> seems like perfect fodder for a compiler to optimize. I understand it's
> not obligated to do that, but I assumed it would.

It probably did compile the code such that there is no variable-sized 
allocation from the stack.  That optimization does not change the *semantics* 
of the code as written -- the only reason this compiles is via use of a 
variable length array.


r~