gdc for rv32&64

[Iain Buclaw]

On Wednesday, 18 August 2021 at 07:08:09 UTC, Mahdi wrote:
> On Tuesday, 17 August 2021 at 20:39:29 UTC, max haughton wrote:
>> On Tuesday, 17 August 2021 at 18:39:27 UTC, Mahdi wrote:
>>> On Monday, 16 August 2021 at 10:05:08 UTC, Iain Buclaw wrote:
>>>> [...]
>>>
>>> Why does a simple or empty Hello program generate a lot of 
>>> assembly output for the risc-v architecture, but not for the 
>>> ARM and X86 architectures?
>>
>> Need an example.
>
> A helloworld program on the X86_64-pc-linux-gnu platform 
> contains 40 lines of assembly code or on the ARM 
> (aarch64-linux-gnu) platform only 34 lines of assembly code, 
> but on the risc-v(riscv64-unknow-gnu-linux) platform contains 
> 871 lines of code on the explore.dgnu.org site!
>
> I'm concerned that this will affect the performance of the 
> risc-v platform.

A Phobos helloworld is over 1000 lines of assembly on both x86_64 
and ARM64.  My guess is that Compiler Explorer isn't smart enough 
to filter RISC-V assembly in the same way as ARM or X86.