<div><br></div><div>Dear Oleson,</div><div><br></div><div>Due to your help, I found the bug in my own target.</div><div>I missed out a glue option of the JumpLink instruction in my InstrInfo.td.</div><div><br></div><div><div>
Thank you so much ! :)</div><div><br></div><div><br></div><div><br></div><div>Hae-woo Park</div><div><br></div></div><div><br></div><br><br><div class="gmail_quote">2011/10/15 Jakob Stoklund Olesen <span dir="ltr"><<a href="mailto:stoklund@2pi.dk">stoklund@2pi.dk</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div style="word-wrap:break-word"><div class="im"><br><div><div>On Oct 14, 2011, at 9:04 PM, Hae-woo Park wrote:</div>
<br><blockquote type="cite"><span style="border-collapse:separate;font-family:Optima;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><div>
I've met a problem that eliminates a live code in code generation phase.</div><div><br></div><div>The initially generated code is shown as follows (as a pseudo code):</div><div>( Before pseudo-code expansion. )</div><div>
<br></div><div>----------</div><div>loop:</div><div> :</div><div> :</div><div> set P0 <- xxx ( P0: a physical register for a parameter of function F )</div><div> set P1 <- yyy ( P1: a physical register for a parameter of function F )</div>
<div> SELECT_CC z1, z2, z3, ...</div><div> ( <- I don't know why this is scheduled at this time,</div><div> however it is independent from function F )</div><div> call F</div><div> :</div><div> :</div>
<div>----------</div><div><br></div><div>After that, pseudo code expansion stage expands SELECT_CC by slicing the machine basic clock.</div></span></blockquote></div><br></div><div>I assume you have your own target? I haven't seen this happening with one of the standard targets.</div>
<div><br></div><div>Your analysis is correct, SELECT_CC shouldn't be scheduled there.</div><div><br></div><div>Normally, LowerCall will create glue edges between the copyToReg SelectionDAG nodes and the CALL node. Is your target not doing that?</div>
<div><br></div><font color="#888888"><div>/jakob</div><div><br></div></font></div></blockquote></div><br>