<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - PHINode containing itself causes segfault in LLVM when compiling Blender OpenCL kernel with R600 backend" href="https://bugs.freedesktop.org/show_bug.cgi?id=84232#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - PHINode containing itself causes segfault in LLVM when compiling Blender OpenCL kernel with R600 backend" href="https://bugs.freedesktop.org/show_bug.cgi?id=84232">bug 84232</a> from <a class="email" href="mailto:vitalif@yourcmc.ru" title="Vitaliy Filippov <vitalif@yourcmc.ru>"> Vitaliy Filippov</a> <pre>I've managed to make a reduced test case with a recursive PHI after StructurizeCFG !!! int main() { int i, j = 0; while (j % 2) { if (j > 100) j += 3; else if (j > 50) break; } return j; } clang-3.5 -S -emit-llvm test3.c opt-3.5 -S -structurizecfg test3.ll > test3cfg.ll Simple to visualise with graphviz: ( echo 'digraph G {'; perl -ne 'if (/\%(\S+) = phi/) { my $a = $1; print "$a -> $_;\n" for /\[ \%([^\s,]+)/g; }' test3cfg.ll; echo '}' ) > test3cfg.dot dot -Tsvg test3cfg.dot > test3cfg.svg %21 and %26 phi's loop in the result. Also there is a branch on constant in the end of test3cfg.ll: br i1 false, label %14, label %Flow2</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>