[Bug middle-end/60429] Miscompilation (aliasing) with -finline-functions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60429

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2014-03-06
          Component|libgcc                      |middle-end
     Ever confirmed|0                           |1

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you identify the inlined call?  Is it

                if (pSLL && y == pSLL->scanline) {
                    loadAET(&AET, pSLL->edgelist);
                    pSLL = pSLL->next;
                }

or

                if (pSLL && y == pSLL->scanline) {
                    loadAET(&AET, pSLL->edgelist);
                    computeWAET(&AET);
                    pSLL = pSLL->next;
                }

?

Can you also show the correct and the invalid assembly snippet?

Not sure if it is possible, but having a "driver" around this (in
a separate compilation-unit) that calls PolygonRegion, verifying correct output
for correct input
and thus showing the miscompile would be nice (so there is a runtime
testcase).  It doesn't matter if linking requires Qt.

I am somewhat lost in that large function ;)