<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#c2">Comment # 2</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>Created <a href="attachment.cgi?id=107527" name="attach_107527" title="Attempt to reduce testcase using bugpoint">attachment 107527</a> <a href="attachment.cgi?id=107527&action=edit" title="Attempt to reduce testcase using bugpoint">[details]</a> Attempt to reduce testcase using bugpoint Tried to reduce the case using bugpoint: PATH=/usr/lib/llvm-3.5/bin/:$PATH bugpoint-3.5 kernel.ll --llc-safe --tool-args -- -march=r600 -mcpu=oland The result leads to other crash, maybe it's also a bug, but it's definitely another bug: llc-3.5 -march=r600 -mcpu=oland bugpoint-reduced-simplified.ll Which leads to a segfault on a non-assert build and to the following message on a release+asserts build: Unhandled loop condition! UNREACHABLE executed at /var/home/vitali/setup/llvm-toolchain-3.5-3.5/lib/Target/R600/SIAnnotateControlFlow.cpp:259! This is probably related to bugpoint replacing the branch conditions with constants, which makes conditional branches effectively unconditional :) and SIAnnotateControlFlow::handleLoopCondition also doesn't handle this case. Looks like an easy to fix problem?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>