| Bug ID | 109608 |
|---|---|
| Summary | Regression from llvm-6: llvm-7 replaces 'undef' with 'NaN', and generates NaN at the assembler level - This issue generates black screen on some fragment shaders. |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/radeonsi |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | patrick9876@free.fr |
| QA Contact | dri-devel@lists.freedesktop.org |
The issue is not related to mesa itself but at the LLVM optimization stage: LLVMRunPassManager(). This bug report is mostly for tracking purposes. Here are two fragment shaders affected: https://www.shadertoy.com/view/ltl3WS and https://www.shadertoy.com/view/MdVcRd Here is the LLVM bug report: https://bugs.llvm.org/show_bug.cgi?id=40690
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