<html>
  <head>

    <meta http-equiv="content-type" content="text/html; charset=utf-8">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <div class="moz-cite-prefix">Hi,<br>
      I don't think your code is correct, because actually there are 2
      structured blocks where you think there is only one.<br>
      According to OpenMP standard structured block "For C/C++, an
      executable statement, ...", i.e. single statement, not several
      statements. So, the detection is correct.<br>
      You have to enclose two first stmts into braces to make it
      compatible with OpenMP standard.<br>
      <br>
      <pre class="moz-signature" cols="72">-- 
Best regards,
Alexey Bataev
=============
Software Engineer
Intel Compiler Team</pre>
      <br>
      18.03.2015 21:08, xiaohui chen пишет:<br>
    </div>
    <blockquote
cite="mid:CALpPt09CHiYF7OtL7FxdmUCSMpQAvsaSxx-+S-Cvx6UqNsGhAA@mail.gmail.com"
      type="cite">
      <div dir="ltr"><br>
        <div class="gmail_extra">just correct a typo, please read the
          below message. </div>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">On Wed, Mar 18, 2015 at 1:01 PM,
            xiaohui chen <span dir="ltr"><<a moz-do-not-send="true"
                href="mailto:xchen198812@gmail.com" target="_blank">xchen198812@gmail.com</a>></span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div dir="ltr">Hi, 
                <div>I am using clang version 3.6.0 (trunk 224915).</div>
                <div><br>
                </div>
                <div>Clang can not parse the following valid OpenMP
                  code:</div>
                <div><br>
                </div>
                <div>
                  <div> 1 #include<omp.h></div>
                  <div>  2 void main()</div>
                  <div>  3 {</div>
                  <div>  4         int i;</div>
                  <div>  5         #pragma omp parallel</div>
                  <div>  6         #pragma omp sections</div>
                  <div>  7         {</div>
                  <div>  8                 i++;</div>
                  <div>  9                 i++;</div>
                  <div> 10                 #pragma omp section</div>
                  <div> 11                 i++;</div>
                  <div> 12         }</div>
                  <div> 13 }</div>
                </div>
                <div><br>
                </div>
                <div>The bug comes from line 8 and 9.</div>
                <div><br>
                </div>
                <div>In OpenMP documentation (<a moz-do-not-send="true"
href="http://www.openmp.org/mp-documents/OpenMP4.0.0.pdf"
                    target="_blank">http://www.openmp.org/mp-documents/OpenMP4.0.0.pdf</a>)
                  page 62,</div>
                <div>it says"Each structured block in the sections
                  construct is preceded by a section directive </div>
                <div>except possibly the first block, for which a
                  preceding section directive is optional." .</div>
                <div><br>
                </div>
                <div>it means that the section directive is optional for
                  the first block, but not the first statement.</div>
                <div><br>
                </div>
                <div>in function  StmtResult
                  Sema::ActOnOpenMPSectionsDirective, </div>
                <div><br>
                </div>
                <div>
                  <div>3021 StmtResult
                    Sema::ActOnOpenMPSectionsDirective(ArrayRef<OMPClause
                    *> Clauses,</div>
                  <div>3022                                            
                      Stmt *AStmt,</div>
                  <div>3023                                            
                      SourceLocation StartLoc,</div>
                  <div>3024                                            
                      SourceLocation EndLoc) {</div>
                  <div>3025   assert(AStmt &&
                    isa<CapturedStmt>(AStmt) && "Captured
                    statement expected");</div>
                  <div>3026   auto BaseStmt = AStmt;</div>
                  <div>3027   while (CapturedStmt *CS =
                    dyn_cast_or_null<CapturedStmt>(BaseStmt))</div>
                  <div>3028     BaseStmt = CS->getCapturedStmt();</div>
                  <div>3029   if (auto C =
                    dyn_cast_or_null<CompoundStmt>(BaseStmt)) {</div>
                  <div>3030     auto S = C->children();</div>
                  <div>3031     if (!S)</div>
                  <div>3032       return StmtError();</div>
                  <div>3033     // All associated statements must be
                    '#pragma omp section' except for</div>
                  <div>3034     // the first one.</div>
                  <div>3035     for (++S; S; ++S) {</div>
                  <div>3036       auto SectionStmt = *S;</div>
                  <div>3037       if (!SectionStmt ||
                    !isa<OMPSectionDirective>(SectionStmt)) {</div>
                  <div>3038         if (SectionStmt)</div>
                  <div>3039          
                    Diag(SectionStmt->getLocStart(),</div>
                  <div>3040              
                     diag::err_omp_sections_substmt_not_section);</div>
                  <div>3041         return StmtError();</div>
                  <div>3042       }</div>
                  <div>3043     }</div>
                  <div>3044   } else {</div>
                  <div>3045     Diag(AStmt->getLocStart(),
                    diag::err_omp_sections_not_compound_stmt);</div>
                  <div>3046     return StmtError();</div>
                  <div>3047   }</div>
                  <div>3048 </div>
                  <div>3049  
                    getCurFunction()->setHasBranchProtectedScope();</div>
                  <div>3050 </div>
                  <div>3051   return
                    OMPSectionsDirective::Create(Context, StartLoc,
                    EndLoc, Clauses,</div>
                  <div>3052                                      
                    AStmt);</div>
                  <div>3053 }</div>
                </div>
                <div><br>
                </div>
                <div>Notice from line 3035 to line 3042, it just checks
                  the first statement not the first block.</div>
                <div><br>
                </div>
                <div><br>
                </div>
              </div>
              <br>
            </blockquote>
          </div>
          <br>
        </div>
      </div>
      <br>
      <br>
      <br>
      <br>
    </blockquote>
    <br>
    <br>
  </body>
</html>