[LLVMdev] How to prevent Dead-Code-Elimination pass removing pseudo-instructions ADJCALLSTACK(DOWN | UP)?

[杨勇勇]

Thank you, Marcello. It works.


2013/9/4 Marcello Maggioni <marcello at codeplay.com>

> You should set them as using/defining your stack register with :
>
> let Defs = [STACKREG], Uses = [STACKREG] in {
> __ YOUR INSTRUCTION __
> }
>
> Marcello
>
>
> On 04/09/13 07:56, 杨勇勇 wrote:
>
>> I use pseudo-instructions ADJCALLSTACK(DOWN | UP) to adjust call stacks,
>> and it works well with "-O0" option. However, ADJCALLSTACK(DOWN | UP) are
>> removed during codegen DCE pass under "-O2".
>>
>
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-- 
杨勇勇 (Yang Yong-Yong)
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