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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">Hi,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">The phase of instruction combine cannot handle the instruction
</span><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">%4 = select i1 %tobool.i, metadata !12, metadata !10 generated by the phase of CFG simplification
and the compiler generates an assertion failure.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">I wonder whe</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">ther
this is valid LLVM IR:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">%4 = select i1 %tobool.i, metadata !12, metadata !10</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"></a><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">Before CFGSimplify<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">cond.true.i: ; preds
= %entry<br>
%add.ptr.i = getelementptr inbounds i8, i8* %2, i64 8<br>
%left_.i.i = bitcast i8* %add.ptr.i to i32**<br>
%3 = call i32** @llvm.fakeload.p0p0i32(i32** %left_.i.i, metadata !8) #6 br label %_ZN1G7insert_Ev.exit<br>
<br>
cond.false.i: ; preds = %entry<br>
%right_.i.i = getelementptr inbounds i8, i8* %2, i64 16<br>
%4 = bitcast i8* %right_.i.i to i32**<br>
%5 = call i32** @llvm.fakeload.p0p0i32(i32** %4, metadata !11) #6<br>
br label %_ZN1G7insert_Ev.exit<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">After CFGSimplify<br>
<br>
</span><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:red"> %4 = select i1 %tobool.i, metadata !12, metadata !10</span><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><br>
%add.ptr.i = getelementptr inbounds i8, i8* %2, i64 %3<br>
%left_.i.i = bitcast i8* %add.ptr.i to i32**<br>
%5 = call i32** @llvm.fakeload.p0p0i32(i32** %left_.i.i, metadata %4) #6<br>
%6 = load i32*, i32** %5, align 8, !tbaa !8</span><span style="color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#203864;mso-style-textfill-fill-color:#203864;mso-style-textfill-fill-alpha:100.0%">Jin<o:p></o:p></span></p>
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