<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - AMDGPU white glitches in some games" href="https://bugs.freedesktop.org/show_bug.cgi?id=98578#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - AMDGPU white glitches in some games" href="https://bugs.freedesktop.org/show_bug.cgi?id=98578">bug 98578</a> from <a class="email" href="mailto:nhaehnle@gmail.com" title="Nicolai Hähnle <nhaehnle@gmail.com>"> Nicolai Hähnle</a> <pre>This took a while to track down. There is a shader (source @9633678, linked into program 1127) which relies on -inf * +F == -inf. LLVM transforms the shader in such a way that the result becomes a NaN instead (visible at a single pixel @ 953,0 in the final frame of the trimmed trace at @14722003), which then propagates to an ugly white square in post-processing. The LLVM transform is simply incorrect and fixed by <a href="https://reviews.llvm.org/D26602">https://reviews.llvm.org/D26602</a>.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>