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Also, push and pop operations are slower on some architectures (I
believe the x86_32 is one of them). Smaller instructions are not
always faster.<br>
<br>
<div class="moz-cite-prefix">On 5/14/14 12:53 PM, Reid Kleckner
wrote:<br>
</div>
<blockquote
cite="mid:CACs=tyKiWSUUdVJ1OM6OT3=U+GHEWOdJEXcaQXkL_F2oCcZ5Hw@mail.gmail.com"
type="cite">
<div dir="ltr">To my knowledge, this is an open project. It would
also really help with x86_32 codegen, but people care less and
less about that as time goes on.</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">
On Wed, May 14, 2014 at 4:05 AM, Rodolphe Suescun <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:rsu.medal@dolphin.fr" target="_blank">rsu.medal@dolphin.fr</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
<br>
We are currently developing an LLVM target for a
micro-controller,<br>
and would like our TargetLowering::LowerCall method to emit<br>
PUSH instructions (instead of STORE) to pass arguments
(which<br>
would improve code density for function calls).<br>
<br>
Is there a way of keeping track of the stack pointer changes<br>
implied by the PUSH instruction to calculate the correct<br>
offsets in RegisterInfo::eliminateFrameIndex when the call<br>
sequence is generated ?<br>
<br>
Thanks a lot in advance,<br>
Rod<br>
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