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<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier">Hi,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">I would like some help regarding the LSR pass. It seems that it likes to duplicate address calculations as in the case above, which is highly undesirable
on my target. <o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">I wonder if there is any way to tell LSR to not duplicate the code in cases like this? Or could I perhaps run CSE after LSR again?
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">What is the logic behind this transformation? It seems that a LSR pass should not insert a multiplication, generally..?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">Thanks,
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">Jonas<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">
</span></font><font size="2" face="Courier"><span lang="SV" style="font-size:10.0pt;font-family:Courier">%_tmp44 = ptrtoint i16* par1 to i16<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %_tmp51 = ptrtoint i16* par2 to i16<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">...<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">inside loop:<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">*** IR Dump After Canonicalize natural loops ***<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">bb7: (header) ; preds = %bb7.lr.ph, %bb11<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp39 = sub i16 %_tmp35, %_tmp38<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %2 = mul i16 %_tmp39, -10<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp41 = add i16 %2, %subframeCount.12.014<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp45 = add i16 %_tmp41, %_tmp44<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp46 = inttoptr i16 %_tmp45 to i16*<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp47 = load i16* %_tmp46, align 1<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">bb8: ; preds = %bb7<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp52 = add i16 %_tmp41, %_tmp51<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp53 = inttoptr i16 %_tmp52 to i16*<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %_tmp54 = load i16* %_tmp53, align 1<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">...<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> br i1 %_tmp64, label %bb7, label %bb13.loopexit<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">(latch)<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">*** IR Dump After
<st1:place w:st="on">Loop</st1:place> Strength Reduction ***<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier">bb7: ; preds = %bb7.lr.ph, %bb11<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %_tmp39 = sub i16 %_tmp35, %_tmp38<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %2 = mul i16 %_tmp39, -10<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %3 = add i16 %_tmp44, %subframeCount.12.014<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %4 = add i16 %3, %2<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %_tmp46 = inttoptr i16 %4 to i16*<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %_tmp47 = load i16* %_tmp46, align 1<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">bb8: ; preds = %bb7<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier"> %5 = sub i16 %_tmp35, %_tmp38<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span style="font-size:10.0pt;
font-family:Courier">
</span></font><font size="2" face="Courier"><span lang="SV" style="font-size:10.0pt;font-family:Courier">%6 = mul i16 %5, -10<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %7 = add i16 %_tmp51, %subframeCount.12.014<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %8 = add i16 %7, %6<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %_tmp53 = inttoptr i16 %8 to i16*<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> %_tmp54 = load i16* %_tmp53, align 1<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier">...<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Courier"><span lang="SV" style="font-size:
10.0pt;font-family:Courier"> br i1 %_tmp64, label %bb7, label %bb13.loopexit<o:p></o:p></span></font></p>
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