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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi, <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am experimenting with the dataflow solver and am wondering whether the following is expected behavior.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I took a function with a trivially true if condition. When constructing the CFG, clang seems to take this into account and does not generate a successor/predecessor relationship between blocks B1 and B3 (see below). However, when running the dataflow solver, I get that {field3, field2} and {field1} are possible sets of accesses to fields, while I would expect that either {field3,field1} or nothing is reported instead of {field1}. Currently, it seems block B1 is visited and its results are propagated, but it does not receive input values from B3.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is this the intended behavior? I would expect that blocks without predecessors and that are not entry blocks would be skipped?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Maarten<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Example function:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>void func1()<o:p></o:p></p><p class=MsoNormal>{<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>field3 = 5<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in'>if(1)<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in;text-indent:.5in'>field2 = 2;<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>else<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in;text-indent:.5in'>field1 = 2;<o:p></o:p></p><p class=MsoNormal>}<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>A dump of the CFG gives:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[B4 (Entry) ]<o:p></o:p></p><p class=MsoNormal>Predecessors (0):<o:p></o:p></p><p class=MsoNormal>Successors (1): B3<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[B1]<o:p></o:p></p><p class=MsoNormal>1: this->field1 = 2<o:p></o:p></p><p class=MsoNormal>Predecessors (0);<o:p></o:p></p><p class=MsoNormal>Successors (1): B0<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[B2]<o:p></o:p></p><p class=MsoNormal>1: this->field2 = 2<o:p></o:p></p><p class=MsoNormal>Predecessors(1):B3<o:p></o:p></p><p class=MsoNormal>Successors(1):B0<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[B3]<o:p></o:p></p><p class=MsoNormal>1: this->field3 = 5<o:p></o:p></p><p class=MsoNormal>2: 1<o:p></o:p></p><p class=MsoNormal>T: if [B3.2]<o:p></o:p></p><p class=MsoNormal>Predecessors (1): B4<o:p></o:p></p><p class=MsoNormal>Successors(2): B2 Null<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[B0 (Exit) ]<o:p></o:p></p><p class=MsoNormal>Predecessors(2):B1 B2<o:p></o:p></p><p class=MsoNormal>Successors(0):<o:p></o:p></p></div></body></html>